:root {
  --bg: #1C1917;
  --surface: #252220;
  --surface2: #2E2B28;
  --surface3: #363230;
  --ink: #F0EDE8;
  --ink2: #A89F96;
  --ink3: #6B6460;
  --accent: #E8643A;
  --accent-light: rgba(232,100,58,0.15);
  --accent-border: rgba(232,100,58,0.35);
  --accent2: #4CAF82;
  --accent2-light: rgba(76,175,130,0.15);
  --accent2-border: rgba(76,175,130,0.35);
  --accent3: #7B9FE0;
  --accent3-light: rgba(123,159,224,0.15);
  --border: rgba(240,237,232,0.1);
  --border2: rgba(240,237,232,0.06);
  --serif: 'DM Serif Display', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
  --radius: 10px;
  --radius-lg: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--sans); background: var(--bg); color: var(--ink); min-height: 100vh; font-size: 15px; }
.shell { max-width: 820px; margin: 0 auto; padding: 0 1.25rem 4rem; }
nav { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; border-bottom: 1px solid var(--border); margin-bottom: 1.75rem; gap: 12px; }
.nav-logo { font-family: var(--serif); font-size: 22px; color: var(--ink); letter-spacing: -0.02em; cursor: default; flex-shrink: 0; }
.nav-logo span { color: var(--accent); font-style: italic; }
.nav-meta { font-size: 12px; color: var(--ink3); letter-spacing: 0.04em; text-transform: uppercase; }

/* ── Main nav links ── */
.nav-links { display: flex; align-items: center; gap: 6px; flex: 1; margin-left: 8px; }
.nav-link { font-size: 13px; padding: 7px 14px; border-radius: var(--radius); border: 1px solid var(--border); cursor: pointer; color: var(--ink2); background: var(--surface2); font-family: var(--sans); transition: all 0.15s; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.nav-link:hover { color: var(--ink); border-color: rgba(240,237,232,0.3); background: var(--surface3); }
.nav-link.active { color: var(--ink); border-color: rgba(240,237,232,0.25); background: var(--surface3); }
.nav-link.disabled { opacity: 0.4; cursor: default; pointer-events: none; }
.nav-link-arrow { font-size: 9px; opacity: 0.6; transition: transform 0.2s; }
.nav-link.open .nav-link-arrow { transform: rotate(180deg); }
.nav-dd-btn-inner { display: flex; flex-direction: column; align-items: flex-start; gap: 1px; }
.nav-dd-btn-eyebrow { font-size: 9px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink3); line-height: 1; }
.nav-dd-btn-title { font-size: 13px; color: var(--ink); font-weight: 500; line-height: 1.2; white-space: nowrap; }

/* ── Chapters dropdown ── */
.nav-dropdown-wrap { position: relative; }
.nav-dropdown { position: absolute; top: calc(100% + 8px); left: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 6px; min-width: 260px; z-index: 100; box-shadow: 0 8px 32px rgba(0,0,0,0.35); opacity: 0; pointer-events: none; transform: translateY(-6px); transition: opacity 0.15s, transform 0.15s; }
.nav-dropdown.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
.nav-dd-item { display: flex; align-items: center; gap: 12px; padding: 9px 12px; border-radius: var(--radius); cursor: pointer; transition: background 0.1s; }
.nav-dd-item:hover { background: var(--surface2); }
.nav-dd-item.active-ch { background: var(--surface2); }
.nav-dd-item.locked-ch { opacity: 0.5; }
.nav-dd-item.locked-ch:hover { background: var(--surface2); }
.nav-dd-dot { width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--border); background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; color: var(--ink3); flex-shrink: 0; }
.nav-dd-dot.done { background: var(--accent2); border-color: var(--accent2); color: white; font-size: 12px; }
.nav-dd-dot.active { background: var(--accent); border-color: var(--accent); color: white; }
.nav-dd-info { flex: 1; min-width: 0; }
.nav-dd-label { font-size: 11px; color: var(--ink3); letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 1px; }
.nav-dd-name { font-size: 13px; color: var(--ink); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-dd-prog { height: 2px; background: var(--border); border-radius: 2px; margin-top: 5px; overflow: hidden; }
.nav-dd-prog-fill { height: 100%; background: var(--accent2); border-radius: 2px; }
.nav-dd-item.active-ch .nav-dd-prog-fill { background: var(--accent); }
.nav-dd-divider { height: 1px; background: var(--border); margin: 4px 0; }
.nav-dd-course-label { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); padding: 8px 12px 3px; font-weight: 600; }
.nav-dd-course-divider { margin: 6px 0; }

/* ── Help dropdown ── */
.help-dd-item { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: var(--radius); cursor: pointer; transition: background 0.1s; }
.help-dd-item:hover { background: var(--surface2); }
.help-dd-icon { font-size: 18px; width: 32px; text-align: center; flex-shrink: 0; }
.help-dd-info { flex: 1; }
.help-dd-name { font-size: 13px; color: var(--ink); font-weight: 500; margin-bottom: 2px; }
.help-dd-desc { font-size: 12px; color: var(--ink3); }

/* ── Help modal ── */
.help-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 1.5rem; }
.help-modal { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); max-width: 560px; width: 100%; max-height: 80vh; overflow: hidden; display: flex; flex-direction: column; box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.help-modal-header { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.help-modal-title { font-family: var(--serif); font-size: 20px; color: var(--ink); }
.help-modal-close { font-size: 13px; color: var(--ink3); cursor: pointer; border: 1px solid var(--border); border-radius: 20px; padding: 4px 12px; background: transparent; font-family: var(--sans); transition: all 0.15s; }
.help-modal-close:hover { color: var(--ink); border-color: rgba(240,237,232,0.3); }
.help-modal-body { padding: 1.5rem; overflow-y: auto; flex: 1; }
.help-os-tabs { display: flex; gap: 4px; background: var(--surface2); border: 1px solid var(--border); border-radius: 24px; padding: 3px; width: fit-content; margin-bottom: 1.25rem; }
.help-os-btn { font-size: 13px; padding: 5px 16px; border-radius: 20px; border: none; cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; }
.help-os-btn.on { background: var(--surface3); color: var(--ink); }
.help-char-grid { display: flex; flex-direction: column; gap: 6px; margin-bottom: 1rem; }
.help-char-row { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.help-char-letter { font-family: var(--serif); font-size: 20px; color: var(--ink); flex-shrink: 0; }
.help-char-shortcut { font-size: 12px; color: var(--ink3); line-height: 1.6; text-align: right; }
.help-char-shortcut code { background: var(--bg); border: 1px solid var(--border); border-radius: 4px; padding: 2px 8px; font-size: 11px; color: var(--ink2); font-family: monospace; white-space: nowrap; display: inline-block; }
.help-section-label { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink3); margin: 1.25rem 0 10px; }
.help-section-label:first-child { margin-top: 0; }
.help-tip { font-size: 13px; color: var(--ink2); line-height: 1.6; background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; margin-bottom: 8px; }
.help-tip strong { color: var(--ink); }
.help-flow-step { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 10px; }
.help-flow-num { width: 24px; height: 24px; border-radius: 50%; background: var(--accent); color: white; font-size: 12px; font-weight: 600; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px; }
.help-flow-text { font-size: 13px; color: var(--ink2); line-height: 1.6; flex: 1; }
.help-flow-text strong { color: var(--ink); }

/* ── Nav right side ── */
.nav-right { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.tab-row { display: flex; gap: 6px; margin-bottom: 1.75rem; flex-wrap: wrap; }
.tab { font-size: 12px; padding: 6px 12px; border-radius: 10px; border: 1px solid var(--border); cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; text-align: left; min-width: 90px; }
.tab:hover { border-color: rgba(240,237,232,0.25); color: var(--ink); }
.tab.on { background: var(--surface2); color: var(--ink); border-color: rgba(240,237,232,0.25); }
.tab-name { font-size: 12px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.tab-cap { font-size: 10px; color: var(--ink3); letter-spacing: 0.05em; margin-bottom: 2px; }
.tab.on .tab-cap { color: var(--ink2); }
.tab-prog-wrap { height: 2px; background: var(--border); border-radius: 2px; margin-top: 4px; overflow: hidden; }
.tab-prog-fill { height: 100%; background: var(--accent2); border-radius: 2px; transition: width 0.4s; }
.tab.on .tab-prog-fill { background: var(--accent); }
.ch-header { margin-bottom: 1.75rem; }
.ch-eyebrow { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink3); margin-bottom: 6px; }
.ch-title { font-family: var(--serif); font-size: 34px; color: var(--ink); line-height: 1.1; margin-bottom: 8px; }
.ch-desc { font-size: 14px; color: var(--ink2); line-height: 1.6; }
.section-nav { display: flex; gap: 4px; margin-bottom: 1.75rem; background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 4px; width: fit-content; }
.sec-btn { font-size: 13px; padding: 6px 18px; border-radius: 20px; border: none; cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; }
.sec-btn:hover { color: var(--ink); }
.sec-btn.on { background: var(--surface3); color: var(--ink); }
/* ── Topic path / timeline ── */
.topic-list { display: flex; flex-direction: column; margin-bottom: 2rem; position: relative; padding-left: 24px; }
.topic-list::before { content: ''; position: absolute; left: 23px; top: 28px; bottom: 28px; width: 2px; background: var(--border); }
.topic-row-item { display: flex; align-items: flex-start; gap: 18px; padding: 6px 0 20px 44px; cursor: pointer; position: relative; transition: opacity 0.15s; }
.topic-row-item:last-child { padding-bottom: 0; }
.topic-row-item:hover .topic-card { border-color: var(--accent); transform: translateX(3px); }
.topic-node { position: absolute; left: 0; top: 6px; width: 36px; height: 36px; border-radius: 50%; border: 2px solid var(--border); background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; color: var(--ink3); flex-shrink: 0; z-index: 1; transition: all 0.2s; font-family: var(--sans); }
.topic-node.done { background: var(--accent2); border-color: var(--accent2); color: white; font-size: 15px; }
.topic-node.active { background: var(--accent); border-color: var(--accent); color: white; box-shadow: 0 0 0 5px var(--accent-light); }
.topic-card { flex: 1; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px 20px; transition: all 0.15s; }
.topic-card.done { border-color: var(--accent2-border); }
.topic-card.active-card { border-color: var(--accent-border); background: var(--surface2); }
.topic-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
.topic-name { font-size: 16px; font-weight: 500; color: var(--ink); line-height: 1.3; }
.topic-status { font-size: 11px; padding: 3px 10px; border-radius: 20px; background: var(--surface2); color: var(--ink3); border: 1px solid var(--border); white-space: nowrap; flex-shrink: 0; }
.topic-status.done { background: var(--accent2-light); color: var(--accent2); border-color: var(--accent2-border); }
.topic-sub { font-size: 13px; color: var(--ink2); line-height: 1.5; margin-bottom: 8px; }
.topic-time { font-size: 11px; color: var(--ink3); margin-top: 6px; opacity: 0.7; }
.topic-prog-bar { height: 3px; background: var(--surface3); border-radius: 2px; margin: 8px 0 4px; overflow: hidden; }
.topic-prog-fill { height: 100%; background: var(--accent2); border-radius: 2px; }
.topic-card-footer { display: flex; align-items: center; gap: 6px; margin-top: 10px; }
.topic-score-badge { font-size: 11px; padding: 2px 8px; border-radius: 20px; background: var(--surface2); color: var(--ink3); border: 1px solid var(--border); }
.topic-review-badge { font-size: 11px; padding: 2px 8px; border-radius: 20px; background: var(--accent-light); color: var(--accent); border: 1px solid var(--accent-border); cursor: pointer; }
.topic-node.locked { background: var(--surface2); border-color: var(--border); color: var(--ink3); font-size: 13px; }
.topic-card.locked-card { opacity: 0.45; cursor: default; }
.topic-row-item.topic-locked { cursor: default; }
.topic-row-item.topic-locked:hover .topic-card { border-color: var(--border); transform: none; }
.topic-status.locked { background: var(--surface2); color: var(--ink3); border-color: var(--border); }
.topic-lock-msg { font-size: 12px; color: var(--ink3); margin-top: 6px; font-style: italic; }
.lesson-header { display: flex; align-items: center; gap: 12px; margin-bottom: 1.75rem; }
.back-btn { font-size: 13px; color: var(--ink3); cursor: pointer; border: 1px solid var(--border); border-radius: 20px; padding: 5px 14px; background: transparent; font-family: var(--sans); transition: all 0.15s; }
.back-btn:hover { color: var(--ink); border-color: rgba(240,237,232,0.25); }
.lesson-title { font-family: var(--serif); font-size: 26px; color: var(--ink); }
.step-indicator { display: flex; align-items: center; gap: 6px; margin-bottom: 1.5rem; }
.step-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--surface3); transition: all 0.3s; }
.step-dot.done { background: var(--accent2); }
.step-dot.current { background: var(--accent); width: 20px; border-radius: 4px; }
.step-label { font-size: 12px; color: var(--ink3); margin-left: 6px; }
.explain-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1.25rem; }
.explain-card h3 { font-family: var(--serif); font-size: 22px; color: var(--ink); margin-bottom: 12px; }
.explain-card p { font-size: 14px; color: var(--ink2); line-height: 1.75; margin-bottom: 12px; }
.explain-card p:last-child { margin-bottom: 0; }
.explain-card strong { color: var(--ink); font-weight: 500; }
.explain-card em { color: var(--accent); font-style: normal; font-weight: 500; }
.callout { background: var(--accent3-light); border: 1px solid rgba(123,159,224,0.25); border-radius: var(--radius); padding: 12px 16px; margin: 14px 0; }
.callout p { font-size: 13px; color: var(--accent3); margin: 0; line-height: 1.6; }
.callout strong { color: var(--accent3); }
.warning-callout { background: var(--accent-light); border: 1px solid var(--accent-border); border-radius: var(--radius); padding: 12px 16px; margin: 14px 0; }
.warning-callout p { font-size: 13px; color: var(--accent); margin: 0; line-height: 1.6; }
.warning-callout strong { color: var(--accent); }
.conj-table-wrap { margin: 16px 0; }
.conj-label { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink3); margin-bottom: 8px; }
.conj-table { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.conj-cell { padding: 9px 14px; font-size: 13px; background: var(--surface2); border-bottom: 1px solid var(--border2); border-right: 1px solid var(--border2); display: flex; justify-content: space-between; align-items: center; }
.conj-cell:nth-child(even) { border-right: none; }
.conj-cell:nth-last-child(-n+2) { border-bottom: none; }
.conj-pron { color: var(--ink3); }
.conj-form { color: var(--ink); font-weight: 500; }
.conj-header-row { background: var(--bg); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink3); text-align: center; padding: 6px; grid-column: span 2; }
.examples { margin: 14px 0; display: flex; flex-direction: column; gap: 8px; }
.ex-sentence { background: var(--surface2); border-radius: var(--radius); padding: 10px 14px; }
.ex-es { font-size: 14px; color: var(--ink); margin-bottom: 3px; }
.ex-es .hl { color: var(--accent); font-weight: 500; }
.ex-en { font-size: 12px; color: var(--ink3); }
.compare-table { width: 100%; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 14px 0; border-collapse: collapse; }
.compare-table th { background: var(--bg); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; padding: 8px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.compare-table th.c0 { color: var(--accent2); }
.compare-table th.c1 { color: var(--accent); }
.compare-table td { padding: 9px 14px; font-size: 13px; border-bottom: 1px solid var(--border2); background: var(--surface2); }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table td.c0 { color: var(--accent2); font-weight: 500; }
.compare-table td.c1 { color: var(--accent); }
.continue-btn { padding: 11px 28px; border-radius: var(--radius); border: 1px solid var(--accent); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--accent); background: var(--accent-light); transition: all 0.15s; margin-top: 0.75rem; }
.continue-btn:hover { background: var(--accent); color: white; }
.ex-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1rem; }
.ex-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.ex-type-badge { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 10px; border-radius: 20px; background: var(--surface2); border: 1px solid var(--border); color: var(--ink3); }
.ex-num { font-size: 12px; color: var(--ink3); margin-left: auto; }
.ex-prompt { font-size: 17px; color: var(--ink); line-height: 1.6; margin-bottom: 1.25rem; }
.ex-prompt .blank { display: inline-block; width: 90px; height: 1px; background: var(--ink2); vertical-align: middle; margin: 0 3px; }
.ex-prompt em { color: var(--ink3); font-style: normal; font-size: 14px; }
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.choice-btn { text-align: left; padding: 10px 16px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: var(--surface2); transition: all 0.15s; }
.choice-btn:hover:not(:disabled) { border-color: rgba(240,237,232,0.3); }
.choice-btn.correct { background: var(--accent2-light); border-color: var(--accent2); color: var(--accent2); }
.choice-btn.wrong { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }
.choice-btn:disabled { cursor: default; }
.fill-wrap { display: flex; gap: 8px; align-items: flex-start; flex-wrap: wrap; }
.fill-input { padding: 10px 14px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 15px; font-family: var(--sans); color: var(--ink); background: var(--surface2); outline: none; flex: 1; min-width: 160px; }
.fill-input:focus { border-color: rgba(240,237,232,0.35); }
.fill-input.correct { border-color: var(--accent2); background: var(--accent2-light); color: var(--accent2); }
.fill-input.wrong { border-color: var(--accent); background: var(--accent-light); color: var(--accent); }
.check-btn { padding: 10px 20px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: var(--surface2); transition: all 0.15s; white-space: nowrap; }
.check-btn:hover { border-color: rgba(240,237,232,0.3); }
.feedback { font-size: 13px; margin-top: 10px; line-height: 1.5; padding: 10px 14px; border-radius: var(--radius); }
.feedback.correct { background: var(--accent2-light); color: var(--accent2); border: 1px solid var(--accent2-border); }
.feedback.wrong { background: var(--accent-light); color: var(--accent); border: 1px solid var(--accent-border); }
.next-btn { margin-top: 1rem; padding: 10px 24px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: transparent; transition: all 0.15s; display: none; }
.next-btn:hover { background: var(--surface2); }
.next-btn.visible { display: inline-block; }
.progress-bar-wrap { background: var(--surface2); border-radius: 4px; height: 3px; margin-top: 1.5rem; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--accent2); border-radius: 4px; transition: width 0.4s ease; }
.progress-label { font-size: 12px; color: var(--ink3); margin-top: 6px; }
.score-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; text-align: center; }
.score-big { font-family: var(--serif); font-size: 56px; color: var(--ink); margin-bottom: 6px; }
.score-sub { font-size: 14px; color: var(--ink2); margin-bottom: 1.5rem; }
.score-btns { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.score-btns button { padding: 9px 20px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 13px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: transparent; }
.score-btns button:hover { background: var(--surface2); }
/* ── Vocab tab ── */
.vocab-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 1.25rem; flex-wrap: wrap; }
.vocab-mode-row { display: flex; gap: 4px; background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 3px; }
.vocab-mode-btn { font-size: 13px; padding: 5px 16px; border-radius: 20px; border: none; cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; }
.vocab-mode-btn.on { background: var(--surface3); color: var(--ink); }
.vocab-wordcount { font-size: 12px; color: var(--ink3); }
.vocab-filters { display: flex; gap: 6px; margin-bottom: 1.25rem; flex-wrap: wrap; }
.vocab-filter { font-size: 12px; padding: 4px 12px; border-radius: 20px; border: 1px solid var(--border); cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; }
.vocab-filter:hover { color: var(--ink); border-color: rgba(240,237,232,0.25); }
.vocab-filter.on { background: var(--surface3); color: var(--ink); border-color: rgba(240,237,232,0.25); }
.vocab-topic-row { display: flex; gap: 6px; margin-bottom: 1rem; flex-wrap: wrap; }
.vocab-topic-btn { font-size: 12px; padding: 4px 12px; border-radius: 20px; border: 1px solid var(--border); cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; }
.vocab-topic-btn:hover { color: var(--ink); border-color: rgba(240,237,232,0.25); }
.vocab-topic-btn.on { background: var(--accent2); color: white; border-color: var(--accent2); }

/* Browse mode — table */
.vocab-table { width: 100%; border-collapse: collapse; }
.vocab-table-head th { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink3); padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); background: var(--surface); }
.vocab-table-row { border-bottom: 1px solid var(--border2); cursor: default; transition: background 0.1s; }
.vocab-table-row:hover { background: var(--surface); }
.vocab-table-row td { padding: 9px 12px; font-size: 14px; vertical-align: middle; }
.vt-es { color: var(--ink); font-weight: 500; }
.vt-en { color: var(--ink2); }
.vt-pos { font-size: 11px; color: var(--ink3); text-transform: uppercase; letter-spacing: 0.04em; }
.vt-known { text-align: center; }
.vt-known-btn { background: none; border: 1px solid var(--border); border-radius: 20px; padding: 2px 10px; font-size: 11px; color: var(--ink3); cursor: pointer; font-family: var(--sans); transition: all 0.15s; white-space: nowrap; }
.vt-known-btn.known { background: var(--accent2-light); border-color: var(--accent2); color: var(--accent2); }
.vt-known-btn:hover { border-color: rgba(240,237,232,0.3); color: var(--ink); }

/* Flashcard mode */
.flashcard-wrap { display: flex; flex-direction: column; align-items: center; gap: 1.25rem; }
.flashcard-progress { font-size: 12px; color: var(--ink3); align-self: stretch; display: flex; justify-content: space-between; align-items: center; }
.flashcard-known-count { font-size: 12px; color: var(--accent2); }
.flashcard { width: 100%; min-height: 220px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); cursor: pointer; user-select: none; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2.5rem 2rem; text-align: center; transition: border-color 0.2s, transform 0.15s; position: relative; }
.flashcard:hover { border-color: rgba(240,237,232,0.25); transform: translateY(-2px); }
.flashcard.revealed { border-color: var(--accent2-border); background: var(--surface2); }
.fc-pos { font-size: 11px; color: var(--ink3); text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 12px; }
.fc-word { font-family: var(--serif); font-size: 40px; color: var(--ink); line-height: 1.15; margin-bottom: 8px; }
.fc-hint { font-size: 13px; color: var(--ink3); }
.fc-translation { font-size: 22px; color: var(--accent2); margin-top: 16px; font-weight: 500; }
.fc-tap-hint { position: absolute; bottom: 14px; right: 18px; font-size: 11px; color: var(--ink3); opacity: 0.6; }
.flashcard-nav { display: flex; gap: 10px; align-items: center; width: 100%; }
.fc-nav-btn { padding: 9px 20px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink2); background: transparent; transition: all 0.15s; }
.fc-nav-btn:hover:not(:disabled) { color: var(--ink); border-color: rgba(240,237,232,0.3); }
.fc-nav-btn:disabled { opacity: 0.3; cursor: default; }
.fc-know-btn { flex: 1; padding: 9px 20px; border-radius: var(--radius); border: 1px solid var(--accent2-border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--accent2); background: var(--accent2-light); transition: all 0.15s; }
.fc-know-btn:hover { background: var(--accent2); color: white; }
.fc-know-btn.known { background: var(--accent2); color: white; border-color: var(--accent2); }
.flashcard-done { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2.5rem; text-align: center; width: 100%; }

/* Quiz mode */
.vocab-quiz-wrap { display: flex; flex-direction: column; gap: 1rem; }
.vq-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.5rem; }
.vq-direction-row { display: flex; gap: 4px; background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 3px; }
.vq-dir-btn { font-size: 12px; padding: 4px 14px; border-radius: 20px; border: none; cursor: pointer; color: var(--ink2); background: transparent; font-family: var(--sans); transition: all 0.15s; }
.vq-dir-btn.on { background: var(--surface3); color: var(--ink); }
.vocab-quiz-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; text-align: center; }
.vq-progress { font-size: 12px; color: var(--ink3); margin-bottom: 1.25rem; }
.vq-prompt-label { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink3); margin-bottom: 10px; }
.vq-word { font-family: var(--serif); font-size: 40px; color: var(--ink); margin-bottom: 6px; line-height: 1.2; }
.vq-pos { font-size: 12px; color: var(--ink3); margin-bottom: 1.5rem; }
.vq-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; text-align: left; max-width: 500px; margin: 0 auto 1rem; }
.vq-btn { padding: 11px 16px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: var(--surface2); transition: all 0.15s; line-height: 1.3; }
.vq-btn:hover:not(:disabled) { border-color: rgba(240,237,232,0.3); }
.vq-btn.correct { background: var(--accent2-light); border-color: var(--accent2); color: var(--accent2); }
.vq-btn.wrong { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }
.vq-btn:disabled { cursor: default; }
.vq-next { margin-top: 1rem; padding: 9px 22px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: transparent; display: none; }
.vq-next.visible { display: inline-block; }
.vq-next:hover { background: var(--surface2); }
.divider { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }

/* ── THEMES ── */
body.theme-white{--bg:#F5F2EB;--surface:#FDFBF7;--surface2:#F0EDE6;--surface3:#E8E4DC;--ink:#1A1714;--ink2:#6B6560;--ink3:#A09990;--accent:#C4451A;--accent-light:rgba(196,69,26,0.1);--accent-border:rgba(196,69,26,0.3);--accent2:#1A7A52;--accent2-light:rgba(26,122,82,0.1);--accent2-border:rgba(26,122,82,0.3);--accent3:#2B5BA8;--accent3-light:rgba(43,91,168,0.1);--border:rgba(26,23,20,0.12);--border2:rgba(26,23,20,0.06);}
/* dark = default :root vars, no class needed */

/* ── Themed mode: chapter-specific palettes ──
   Applied as body.theme-themed.ch-P, body.theme-themed.ch-1, etc.
   Shared structural overrides apply to all themed chapters.          */

/* Shared themed structure */
body.theme-themed {
  --radius: 6px;
  --radius-lg: 10px;
  transition: background 0.7s ease, color 0.7s ease;
}
body.theme-themed::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.06;
  pointer-events: none;
  background-image: var(--tile-pattern);
  background-size: var(--tile-size, 60px) var(--tile-size, 60px);
}
body.theme-themed .explain-card { border-left: 3px solid var(--accent-border); }
body.theme-themed .topic-card.active-card { border-left: 3px solid var(--accent); }
body.theme-themed .topic-card.done { border-left: 3px solid var(--accent2-border); }
body.theme-themed .dash-card { border-bottom: 2px solid var(--accent-border); border-radius: 6px 6px 4px 4px; }
body.theme-themed .tab { border-radius: 6px; }
body.theme-themed .tab.on { background: var(--accent-light); border-color: var(--accent-border); }
body.theme-themed #bg-canvas { display: none; }

/* Cap. P — Slate chalk board. You're just starting. */
body.theme-themed.ch-P {
  --bg: #1A1F24;
  --surface: #242B32;
  --surface2: #2E3740;
  --surface3: #38434E;
  --ink: #EDF2F0;
  --ink2: #8FA8A0;
  --ink3: #556B66;
  --accent: #E07B54;
  --accent-light: rgba(224,123,84,0.15);
  --accent-border: rgba(224,123,84,0.35);
  --accent2: #5BB89A;
  --accent2-light: rgba(91,184,154,0.15);
  --accent2-border: rgba(91,184,154,0.35);
  --accent3: #7B9FD4;
  --accent3-light: rgba(123,159,212,0.15);
  --border: rgba(237,242,240,0.1);
  --border2: rgba(237,242,240,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Cline x1='0' y1='20' x2='40' y2='20' stroke='%23EDF2F0' stroke-width='0.4'/%3E%3Cline x1='20' y1='0' x2='20' y2='40' stroke='%23EDF2F0' stroke-width='0.4'/%3E%3C/svg%3E");
  --tile-size: 40px;
}

/* Cap. 1 — Deep navy academia. Lecture halls, worn wood, candlelight. */
body.theme-themed.ch-1 {
  --bg: #0F1B2D;
  --surface: #162440;
  --surface2: #1D2E50;
  --surface3: #253860;
  --ink: #EEE8D8;
  --ink2: #8A9EC0;
  --ink3: #4A6080;
  --accent: #C9993A;
  --accent-light: rgba(201,153,58,0.15);
  --accent-border: rgba(201,153,58,0.35);
  --accent2: #4A9E82;
  --accent2-light: rgba(74,158,130,0.15);
  --accent2-border: rgba(74,158,130,0.35);
  --accent3: #9B7ED4;
  --accent3-light: rgba(155,126,212,0.15);
  --border: rgba(238,232,216,0.1);
  --border2: rgba(238,232,216,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Crect x='1' y='1' width='58' height='58' fill='none' stroke='%23EEE8D8' stroke-width='0.4'/%3E%3Cpath d='M1,1 L59,59 M59,1 L1,59' stroke='%23EEE8D8' stroke-width='0.2'/%3E%3C/svg%3E");
  --tile-size: 60px;
}

/* Cap. 2 — Warm coral social. Conversation, laughter, summer afternoons. */
body.theme-themed.ch-2 {
  --bg: #2A1218;
  --surface: #3A1A22;
  --surface2: #4A222C;
  --surface3: #5A2A36;
  --ink: #F5E8E0;
  --ink2: #C09088;
  --ink3: #805858;
  --accent: #E8703A;
  --accent-light: rgba(232,112,58,0.15);
  --accent-border: rgba(232,112,58,0.35);
  --accent2: #5AB898;
  --accent2-light: rgba(90,184,152,0.15);
  --accent2-border: rgba(90,184,152,0.35);
  --accent3: #D4847B;
  --accent3-light: rgba(212,132,123,0.15);
  --border: rgba(245,232,224,0.1);
  --border2: rgba(245,232,224,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50'%3E%3Ccircle cx='25' cy='25' r='20' fill='none' stroke='%23F5E8E0' stroke-width='0.4'/%3E%3Ccircle cx='25' cy='25' r='8' fill='none' stroke='%23F5E8E0' stroke-width='0.3'/%3E%3C/svg%3E");
  --tile-size: 50px;
}

/* Cap. 3 — Deep burgundy festive. Music, food, celebration. */
body.theme-themed.ch-3 {
  --bg: #1E0F18;
  --surface: #2C1624;
  --surface2: #3A1E30;
  --surface3: #48263C;
  --ink: #F0E4D0;
  --ink2: #B89070;
  --ink3: #785840;
  --accent: #D4882A;
  --accent-light: rgba(212,136,42,0.15);
  --accent-border: rgba(212,136,42,0.35);
  --accent2: #6AAA78;
  --accent2-light: rgba(106,170,120,0.15);
  --accent2-border: rgba(106,170,120,0.35);
  --accent3: #C47AAA;
  --accent3-light: rgba(196,122,170,0.15);
  --border: rgba(240,228,208,0.1);
  --border2: rgba(240,228,208,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpolygon points='30,4 56,18 56,42 30,56 4,42 4,18' fill='none' stroke='%23F0E4D0' stroke-width='0.4'/%3E%3Cpolygon points='30,16 44,24 44,36 30,44 16,36 16,24' fill='none' stroke='%23F0E4D0' stroke-width='0.3'/%3E%3C/svg%3E");
  --tile-size: 60px;
}

/* Cap. 4 — Forest green family. Roots, growth, earth. */
body.theme-themed.ch-4 {
  --bg: #0E1A10;
  --surface: #162418;
  --surface2: #1E3020;
  --surface3: #263C28;
  --ink: #E8F0DC;
  --ink2: #88A878;
  --ink3: #486848;
  --accent: #C8883A;
  --accent-light: rgba(200,136,58,0.15);
  --accent-border: rgba(200,136,58,0.35);
  --accent2: #62B878;
  --accent2-light: rgba(98,184,120,0.15);
  --accent2-border: rgba(98,184,120,0.35);
  --accent3: #8AC8A8;
  --accent3-light: rgba(138,200,168,0.15);
  --border: rgba(232,240,220,0.1);
  --border2: rgba(232,240,220,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50'%3E%3Cpath d='M25,2 Q35,12 48,25 Q35,38 25,48 Q15,38 2,25 Q15,12 25,2 Z' fill='none' stroke='%23E8F0DC' stroke-width='0.4'/%3E%3C/svg%3E");
  --tile-size: 50px;
}

/* Cap. 5 — Dusty blue domestic. Quiet rooms, linen, afternoon light. */
body.theme-themed.ch-5 {
  --bg: #131C26;
  --surface: #1A2636;
  --surface2: #223046;
  --surface3: #2A3A56;
  --ink: #E8EEF4;
  --ink2: #7898B8;
  --ink3: #486078;
  --accent: #C8A05A;
  --accent-light: rgba(200,160,90,0.15);
  --accent-border: rgba(200,160,90,0.35);
  --accent2: #5AAAB0;
  --accent2-light: rgba(90,170,176,0.15);
  --accent2-border: rgba(90,170,176,0.35);
  --accent3: #8898D8;
  --accent3-light: rgba(136,152,216,0.15);
  --border: rgba(232,238,244,0.1);
  --border2: rgba(232,238,244,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Crect x='5' y='5' width='50' height='50' fill='none' stroke='%23E8EEF4' stroke-width='0.4' rx='4'/%3E%3Crect x='15' y='15' width='30' height='30' fill='none' stroke='%23E8EEF4' stroke-width='0.3' rx='2'/%3E%3Ccircle cx='30' cy='30' r='6' fill='none' stroke='%23E8EEF4' stroke-width='0.3'/%3E%3C/svg%3E");
  --tile-size: 60px;
}

/* Cap. 6 — Deep indigo mercado. Saffron lanterns, silk, market stalls. */
body.theme-themed.ch-6 {
  --bg: #100E24;
  --surface: #181634;
  --surface2: #201E44;
  --surface3: #282654;
  --ink: #F2ECD8;
  --ink2: #A898C8;
  --ink3: #686080;
  --accent: #E8B83A;
  --accent-light: rgba(232,184,58,0.15);
  --accent-border: rgba(232,184,58,0.35);
  --accent2: #5AB8A0;
  --accent2-light: rgba(90,184,160,0.15);
  --accent2-border: rgba(90,184,160,0.35);
  --accent3: #C87EC8;
  --accent3-light: rgba(200,126,200,0.15);
  --border: rgba(242,236,216,0.1);
  --border2: rgba(242,236,216,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Crect width='60' height='60' fill='none' stroke='%23F2ECD8' stroke-width='0.4'/%3E%3Ccircle cx='30' cy='30' r='14' fill='none' stroke='%23F2ECD8' stroke-width='0.4'/%3E%3Cpath d='M0,0 L60,60 M60,0 L0,60' stroke='%23F2ECD8' stroke-width='0.2'/%3E%3Ccircle cx='0' cy='0' r='7' fill='none' stroke='%23F2ECD8' stroke-width='0.4'/%3E%3Ccircle cx='60' cy='0' r='7' fill='none' stroke='%23F2ECD8' stroke-width='0.4'/%3E%3Ccircle cx='0' cy='60' r='7' fill='none' stroke='%23F2ECD8' stroke-width='0.4'/%3E%3Ccircle cx='60' cy='60' r='7' fill='none' stroke='%23F2ECD8' stroke-width='0.4'/%3E%3C/svg%3E");
  --tile-size: 60px;
}

/* Cap. 7 — Sunlit pitch. Grass, open sky, stadium energy. */
body.theme-themed.ch-7 {
  --bg: #0C1A0E;
  --surface: #122018;
  --surface2: #1A2C20;
  --surface3: #22382A;
  --ink: #E8F4E0;
  --ink2: #7AAE88;
  --ink3: #447855;
  --accent: #C8D83A;
  --accent-light: rgba(200,216,58,0.15);
  --accent-border: rgba(200,216,58,0.35);
  --accent2: #4AB898;
  --accent2-light: rgba(74,184,152,0.15);
  --accent2-border: rgba(74,184,152,0.35);
  --accent3: #E8A840;
  --accent3-light: rgba(232,168,64,0.15);
  --border: rgba(232,244,224,0.1);
  --border2: rgba(232,244,224,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cline x1='0' y1='0' x2='60' y2='0' stroke='%23E8F4E0' stroke-width='0.4'/%3E%3Cline x1='0' y1='20' x2='60' y2='20' stroke='%23E8F4E0' stroke-width='0.3'/%3E%3Cline x1='0' y1='40' x2='60' y2='40' stroke='%23E8F4E0' stroke-width='0.3'/%3E%3Cline x1='0' y1='60' x2='60' y2='60' stroke='%23E8F4E0' stroke-width='0.4'/%3E%3Ccircle cx='30' cy='30' r='10' fill='none' stroke='%23E8F4E0' stroke-width='0.4'/%3E%3C/svg%3E");
  --tile-size: 60px;
}

/* Cap. 8 — Festival night. Marigolds, candlelight, papel picado. */
body.theme-themed.ch-8 {
  --bg: #1A0E08;
  --surface: #261610;
  --surface2: #341E18;
  --surface3: #422620;
  --ink: #F8EAD0;
  --ink2: #C89858;
  --ink3: #886038;
  --accent: #E86820;
  --accent-light: rgba(232,104,32,0.15);
  --accent-border: rgba(232,104,32,0.35);
  --accent2: #D4A822;
  --accent2-light: rgba(212,168,34,0.15);
  --accent2-border: rgba(212,168,34,0.35);
  --accent3: #C84878;
  --accent3-light: rgba(200,72,120,0.15);
  --border: rgba(248,234,208,0.1);
  --border2: rgba(248,234,208,0.06);
  --tile-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpolygon points='30,2 36,22 58,22 40,36 47,58 30,44 13,58 20,36 2,22 24,22' fill='none' stroke='%23F8EAD0' stroke-width='0.4'/%3E%3C/svg%3E");
  --tile-size: 60px;
}

/* ── Theme panel ── */
.theme-btn { font-size: 13px; padding: 7px 14px; border-radius: var(--radius); border: 1px solid var(--border); cursor: pointer; color: var(--ink2); background: var(--surface2); font-family: var(--sans); transition: all 0.15s; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.theme-btn:hover { color: var(--ink); border-color: rgba(240,237,232,0.3); background: var(--surface3); }
.theme-panel-wrap{position:relative;}
.theme-panel{position:absolute;right:0;top:calc(100% + 8px);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px;min-width:200px;z-index:100;display:none;box-shadow:0 4px 24px rgba(0,0,0,0.3);}
.theme-panel.open{display:block;}
.theme-panel-title{font-size:11px;letter-spacing:0.07em;text-transform:uppercase;color:var(--ink3);margin-bottom:10px;}
.theme-options{display:flex;flex-direction:column;gap:6px;}
.theme-opt{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius);border:1px solid var(--border);cursor:pointer;transition:all 0.15s;background:transparent;font-family:var(--sans);font-size:13px;color:var(--ink2);width:100%;text-align:left;}
.theme-opt:hover{border-color:var(--accent);color:var(--ink);}
.theme-opt.active{border-color:var(--accent);color:var(--ink);background:var(--surface2);}
.theme-opt-dot{width:18px;height:18px;border-radius:50%;flex-shrink:0;border:1.5px solid rgba(128,128,128,0.3);}
.theme-opt-info{display:flex;flex-direction:column;gap:1px;}
.theme-opt-name{font-size:13px;font-weight:500;}
.theme-opt-desc{font-size:11px;color:var(--ink3);}

/* ── Daily fact card ── */
.daily-fact { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.1rem 1.4rem; margin-bottom: 1.75rem; display: flex; align-items: flex-start; gap: 14px; }
.daily-fact-icon { font-size: 22px; flex-shrink: 0; margin-top: 1px; }
.daily-fact-inner { flex: 1; min-width: 0; }
.daily-fact-label { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 5px; font-weight: 600; }
.daily-fact-text { font-size: 14px; color: var(--ink2); line-height: 1.65; }
.daily-fact-text strong { color: var(--ink); }
.home-hero { padding: 2.5rem 0 2rem; border-bottom: 1px solid var(--border); margin-bottom: 2rem; }
.home-hero-eyebrow { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.home-hero-title { font-family: var(--serif); font-size: 42px; color: var(--ink); line-height: 1.1; margin-bottom: 10px; }
.home-hero-title span { color: var(--accent); font-style: italic; }
.home-hero-sub { font-size: 15px; color: var(--ink2); line-height: 1.6; max-width: 520px; margin-bottom: 1.5rem; }
.home-hero-btns { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.home-resume-btn { padding: 11px 24px; border-radius: var(--radius); border: none; font-size: 14px; font-family: var(--sans); cursor: pointer; color: white; background: var(--accent); font-weight: 500; transition: all 0.15s; }
.home-resume-btn:hover { opacity: 0.88; transform: translateY(-1px); }
.home-browse-btn { padding: 11px 24px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink2); background: transparent; transition: all 0.15s; }
.home-browse-btn:hover { color: var(--ink); border-color: rgba(240,237,232,0.3); }
.home-quiz-btn { padding: 11px 24px; border-radius: var(--radius); border: 1px solid var(--accent-border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--accent); background: var(--accent-light); transition: all 0.15s; }
.home-quiz-btn:hover { background: var(--accent); color: white; transform: translateY(-1px); }
.home-quiz-btn.disabled { opacity: 0.4; cursor: default; pointer-events: none; }

/* ── Quick Quiz overlay ── */
.quiz-overlay { position: fixed; inset: 0; background: var(--bg); z-index: 300; overflow-y: auto; }
.quiz-shell { max-width: 620px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
.quiz-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2rem; }
.quiz-title { font-family: var(--serif); font-size: 24px; color: var(--ink); }
.quiz-close { font-size: 13px; color: var(--ink3); cursor: pointer; border: 1px solid var(--border); border-radius: 20px; padding: 5px 14px; background: transparent; font-family: var(--sans); transition: all 0.15s; }
.quiz-close:hover { color: var(--ink); border-color: rgba(240,237,232,0.3); }
.quiz-progress-wrap { margin-bottom: 1.75rem; }
.quiz-progress-bar { height: 4px; background: var(--surface2); border-radius: 4px; overflow: hidden; margin-bottom: 6px; }
.quiz-progress-fill { height: 100%; background: var(--accent); border-radius: 4px; transition: width 0.4s ease; }
.quiz-progress-label { font-size: 12px; color: var(--ink3); display: flex; justify-content: space-between; }
.quiz-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; margin-bottom: 1rem; }
.quiz-q-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 1rem; }
.quiz-q-badge { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 10px; border-radius: 20px; background: var(--surface2); border: 1px solid var(--border); color: var(--ink3); }
.quiz-q-source { font-size: 12px; color: var(--ink3); margin-left: auto; }
.quiz-q-prompt { font-size: 18px; color: var(--ink); line-height: 1.6; margin-bottom: 1.5rem; }
.quiz-q-prompt .blank { display: inline-block; width: 100px; height: 1px; background: var(--ink2); vertical-align: middle; margin: 0 4px; }
.quiz-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 1rem; }
.quiz-choice { text-align: left; padding: 11px 16px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: var(--surface2); transition: all 0.15s; line-height: 1.4; }
.quiz-choice:hover:not(:disabled) { border-color: rgba(240,237,232,0.3); background: var(--surface3); }
.quiz-choice.correct { background: var(--accent2-light); border-color: var(--accent2); color: var(--accent2); }
.quiz-choice.wrong { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }
.quiz-choice:disabled { cursor: default; }
.quiz-fill-wrap { display: flex; gap: 8px; margin-bottom: 1rem; }
.quiz-fill-input { flex: 1; padding: 11px 14px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 15px; font-family: var(--sans); color: var(--ink); background: var(--surface2); outline: none; }
.quiz-fill-input:focus { border-color: rgba(240,237,232,0.35); }
.quiz-fill-input.correct { border-color: var(--accent2); background: var(--accent2-light); color: var(--accent2); }
.quiz-fill-input.wrong { border-color: var(--accent); background: var(--accent-light); color: var(--accent); }
.quiz-check-btn { padding: 11px 20px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: var(--surface2); white-space: nowrap; transition: all 0.15s; }
.quiz-check-btn:hover { background: var(--surface3); }
.quiz-feedback { font-size: 13px; padding: 10px 14px; border-radius: var(--radius); line-height: 1.5; margin-bottom: 1rem; }
.quiz-feedback.correct { background: var(--accent2-light); color: var(--accent2); border: 1px solid var(--accent2-border); }
.quiz-feedback.wrong { background: var(--accent-light); color: var(--accent); border: 1px solid var(--accent-border); }
.quiz-next-btn { padding: 11px 28px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: transparent; transition: all 0.15s; }
.quiz-next-btn:hover { background: var(--surface2); }
.quiz-score-wrap { text-align: center; padding: 1rem 0; }
.quiz-score-icon { font-size: 48px; margin-bottom: 1rem; }
.quiz-score-title { font-family: var(--serif); font-size: 32px; color: var(--ink); margin-bottom: 8px; }
.quiz-score-num { font-family: var(--serif); font-size: 64px; color: var(--accent); line-height: 1; margin-bottom: 6px; }
.quiz-score-sub { font-size: 15px; color: var(--ink2); margin-bottom: 2rem; }
.quiz-score-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.quiz-score-retake { padding: 11px 28px; border-radius: var(--radius); border: none; font-size: 14px; font-family: var(--sans); cursor: pointer; color: white; background: var(--accent); font-weight: 500; }
.quiz-score-retake:hover { opacity: 0.88; }
.quiz-score-home { padding: 11px 28px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink2); background: transparent; }
.quiz-score-home:hover { color: var(--ink); background: var(--surface2); }

/* Stats row */
.home-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-bottom: 2rem; }
.home-stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px 18px; }
.home-stat-label { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink3); margin-bottom: 6px; }
.home-stat-value { font-family: var(--serif); font-size: 32px; color: var(--ink); line-height: 1; margin-bottom: 3px; }
.home-stat-value.streak { color: var(--accent); }
.home-stat-value.green { color: var(--accent2); }
.home-stat-sub { font-size: 12px; color: var(--ink3); }

/* Resume card */
.home-resume-card { background: var(--surface); border: 1px solid var(--accent-border); border-radius: var(--radius-lg); padding: 1.25rem 1.5rem; margin-bottom: 2rem; display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.home-resume-left { flex: 1; min-width: 0; }
.home-resume-eyebrow { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--accent); margin-bottom: 5px; }
.home-resume-topic { font-size: 18px; font-weight: 500; color: var(--ink); margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.home-resume-chapter { font-size: 13px; color: var(--ink2); }
.home-resume-action { padding: 9px 20px; border-radius: var(--radius); border: 1px solid var(--accent-border); font-size: 13px; font-family: var(--sans); cursor: pointer; color: var(--accent); background: var(--accent-light); white-space: nowrap; transition: all 0.15s; flex-shrink: 0; }
.home-resume-action:hover { background: var(--accent); color: white; }

/* Chapter map */
.home-section-title { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink3); margin-bottom: 1rem; margin-top: 0.5rem; }
.home-chapter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; margin-bottom: 2rem; }
.home-ch-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.1rem 1.25rem; cursor: pointer; transition: all 0.15s; }
.home-ch-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.home-ch-card.ch-active { border-color: var(--accent-border); background: var(--surface2); }
.home-ch-card.ch-done { border-color: var(--accent2-border); }
.home-ch-card.ch-locked { opacity: 0.45; }
.home-ch-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.home-ch-num { width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--border); background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; color: var(--ink3); flex-shrink: 0; }
.home-ch-num.done { background: var(--accent2); border-color: var(--accent2); color: white; }
.home-ch-num.active { background: var(--accent); border-color: var(--accent); color: white; box-shadow: 0 0 0 4px var(--accent-light); }
.home-ch-pct { font-size: 12px; color: var(--ink3); }
.home-ch-pct.green { color: var(--accent2); }
.home-ch-label { font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink3); margin-bottom: 3px; }
.home-ch-name { font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 10px; }
.home-ch-bar { height: 3px; background: var(--surface3); border-radius: 2px; overflow: hidden; }
.home-ch-bar-fill { height: 100%; background: var(--accent2); border-radius: 2px; transition: width 0.4s; }
.home-ch-card.ch-active .home-ch-bar-fill { background: var(--accent); }
.unlock-toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(80px);background:var(--surface);border:1px solid var(--accent);border-radius:var(--radius-lg);padding:14px 20px;font-size:14px;color:var(--ink);z-index:999;transition:transform 0.4s cubic-bezier(0.34,1.56,0.64,1);pointer-events:none;white-space:nowrap;}
.unlock-toast.show{transform:translateX(-50%) translateY(0);}
.unlock-toast strong{color:var(--accent);}

/* ── QOL: dashboard ── */
.dashboard{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin-bottom:1.75rem;}
.dash-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px 16px;}
.dash-label{font-size:11px;letter-spacing:0.07em;text-transform:uppercase;color:var(--ink3);margin-bottom:6px;}
.dash-value{font-family:var(--serif);font-size:28px;color:var(--ink);line-height:1;}
.dash-sub{font-size:12px;color:var(--ink3);margin-top:3px;}
.dash-streak{color:var(--accent);}

/* ── Current chapter subsection list ── */
.ch-subsection-list{display:flex;flex-direction:column;gap:6px;margin-bottom:1.75rem;}
.ch-sub-row{display:flex;align-items:flex-start;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:12px 14px;cursor:pointer;transition:all 0.15s;}
.ch-sub-row:hover{border-color:var(--accent);transform:translateX(2px);}
.ch-sub-row.ch-sub-done{border-color:var(--accent2-border);opacity:0.75;}
.ch-sub-row.ch-sub-done:hover{opacity:1;}
.ch-sub-row.ch-sub-next{border-color:var(--accent-border);}
.ch-sub-node{width:28px;height:28px;border-radius:50%;border:2px solid var(--border);background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;color:var(--ink3);flex-shrink:0;font-family:var(--sans);}
.ch-sub-node.done{background:var(--accent2);border-color:var(--accent2);color:white;font-size:13px;}
.ch-sub-node.active{background:var(--accent);border-color:var(--accent);color:white;box-shadow:0 0 0 3px var(--accent-light);}
.ch-sub-body{flex:1;min-width:0;}
.ch-sub-top{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:2px;}
.ch-sub-name{font-size:14px;font-weight:500;color:var(--ink);}
.ch-sub-badge{font-size:11px;padding:2px 8px;border-radius:20px;}
.ch-sub-badge.done{background:var(--accent2-light);color:var(--accent2);border:1px solid var(--accent2-border);}
.ch-sub-badge.active{background:var(--accent-light);color:var(--accent);border:1px solid var(--accent-border);}
.ch-sub-desc{font-size:12px;color:var(--ink3);}

/* ── QOL: soft lock ── */
.softlock-banner{background:var(--accent-light);border:1px solid var(--accent-border);border-radius:var(--radius-lg);padding:2rem;margin-bottom:1.25rem;font-size:16px;color:var(--accent);display:flex;flex-direction:column;align-items:center;text-align:center;gap:1.25rem;}
.softlock-dismiss{font-size:14px;cursor:pointer;white-space:nowrap;color:white;background:var(--accent);border:none;font-family:var(--sans);padding:10px 24px;border-radius:var(--radius);font-weight:500;}
.softlock-dismiss:hover{opacity:0.9;}

/* ── QOL: score + review badges ── */
.topic-score-badge{font-size:11px;padding:2px 8px;border-radius:20px;background:var(--surface2);color:var(--ink3);border:1px solid var(--border);margin-left:6px;}
.topic-review-badge{font-size:11px;padding:2px 8px;border-radius:20px;background:var(--accent-light);color:var(--accent);border:1px solid var(--accent-border);margin-left:6px;cursor:pointer;}
.topic-actions{display:flex;align-items:center;gap:4px;}

/* ── QOL: tab pips — hidden, replaced by tab progress bars ── */
.tab-pip-row{display:none;}
.tab-pip{width:4px;height:4px;border-radius:50%;background:currentColor;opacity:0.3;}
.tab-pip.done{opacity:1;}
.tab.locked-tab{opacity:0.5;}

/* ── Stepped lesson sections ── */
.lesson-section{border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:1rem;overflow:hidden;}
.lesson-section-header{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;cursor:pointer;background:var(--surface);user-select:none;}
.lesson-section-header:hover{background:var(--surface2);}
.lesson-section-num{font-size:11px;letter-spacing:0.06em;text-transform:uppercase;color:var(--ink3);}
.lesson-section-title{font-size:14px;color:var(--ink);font-weight:500;}
.lesson-section-badge{font-size:11px;padding:2px 8px;border-radius:20px;}
.lesson-section-badge.done{background:var(--accent2-light);color:var(--accent2);border:1px solid var(--accent2-border);}
.lesson-section-badge.active{background:var(--accent-light);color:var(--accent);border:1px solid var(--accent-border);}
.lesson-section-body{padding:1rem 1.25rem 0.5rem;background:var(--surface);border-top:1px solid var(--border);}
.lesson-section-body.hidden{display:none;}

/* ── Check questions ── */
.checks-wrap{padding:0.75rem 1.25rem 1rem;background:var(--surface2);border-top:1px solid var(--border);}
.check-question{margin-bottom:1rem;}
.check-question:last-child{margin-bottom:0;}
.check-q-label{font-size:11px;letter-spacing:0.07em;text-transform:uppercase;color:var(--accent3);margin-bottom:6px;font-weight:500;}
.check-q-prompt{font-size:15px;color:var(--ink);margin-bottom:10px;line-height:1.5;}
.check-choices{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:6px;}
.check-btn-opt{text-align:left;padding:8px 14px;border-radius:var(--radius);border:1px solid var(--border);font-size:13px;font-family:var(--sans);cursor:pointer;color:var(--ink);background:var(--surface);transition:all 0.15s;}
.check-btn-opt:hover:not(:disabled){border-color:rgba(240,237,232,0.3);background:var(--surface2);}
.check-btn-opt.correct{background:var(--accent2-light);border-color:var(--accent2);color:var(--accent2);}
.check-btn-opt.wrong{background:var(--accent-light);border-color:var(--accent);color:var(--accent);}
.check-btn-opt:disabled{cursor:default;}
.check-fill-wrap{display:flex;gap:8px;margin-bottom:6px;}
.check-fill-input{flex:1;padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border);font-size:14px;font-family:var(--sans);color:var(--ink);background:var(--surface);outline:none;}
.check-fill-input:focus{border-color:rgba(240,237,232,0.3);}
.check-fill-input.correct{border-color:var(--accent2);background:var(--accent2-light);color:var(--accent2);}
.check-fill-input.wrong{border-color:var(--accent);background:var(--accent-light);color:var(--accent);}
.check-submit{padding:8px 18px;border-radius:var(--radius);border:1px solid var(--border);font-size:13px;font-family:var(--sans);cursor:pointer;color:var(--ink);background:var(--surface);white-space:nowrap;}
.check-submit:hover{background:var(--surface2);}
.check-feedback{font-size:13px;margin-top:6px;padding:8px 12px;border-radius:var(--radius);line-height:1.5;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.check-feedback.correct{background:var(--accent2-light);color:var(--accent2);border:1px solid var(--accent2-border);}
.check-feedback.wrong{background:var(--accent-light);color:var(--accent);border:1px solid var(--accent-border);}
.check-retry{font-size:13px;margin-top:8px;padding:6px 16px;border-radius:var(--radius);border:1px solid var(--border);font-family:var(--sans);cursor:pointer;color:var(--ink);background:transparent;display:block;}
.check-retry:hover{background:var(--surface2);}
.check-next-btn{flex-shrink:0;padding:7px 18px;border-radius:var(--radius);border:none;font-size:13px;font-family:var(--sans);cursor:pointer;color:white;background:var(--accent);font-weight:500;transition:all 0.15s;}
.check-next-btn:hover{opacity:0.88;transform:translateY(-1px);}
.checks-complete{font-size:13px;color:var(--accent2);padding:6px 0 2px;}
.unlock-next-btn{margin-top:10px;padding:9px 20px;border-radius:var(--radius);background:var(--accent);border:none;color:white;font-size:14px;font-family:var(--sans);cursor:pointer;font-weight:500;}
.unlock-next-btn:hover{opacity:0.9;}

/* ── Softlock modal ── */
.softlock-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 1.5rem; }
.softlock-modal { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; max-width: 400px; width: 100%; box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.softlock-modal-icon { font-size: 32px; margin-bottom: 12px; }
.softlock-modal-title { font-family: var(--serif); font-size: 22px; color: var(--ink); margin-bottom: 8px; }
.softlock-modal-body { font-size: 14px; color: var(--ink2); line-height: 1.6; margin-bottom: 1.5rem; }
.softlock-modal-body strong { color: var(--ink); }
.softlock-modal-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.softlock-go-back { flex: 1; padding: 10px 16px; border-radius: var(--radius); border: 1px solid var(--border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--ink); background: var(--surface2); transition: all 0.15s; }
.softlock-go-back:hover { background: var(--surface3); }
.softlock-continue { flex: 1; padding: 10px 16px; border-radius: var(--radius); border: 1px solid var(--accent-border); font-size: 14px; font-family: var(--sans); cursor: pointer; color: var(--accent); background: var(--accent-light); transition: all 0.15s; }
.softlock-continue:hover { background: var(--accent); color: white; }
#bg-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 0;
  display: none;
  opacity: 0;
  transition: opacity 0.8s ease;
}
body.theme-themed #bg-canvas { display: block; opacity: 1; }
.shell { position: relative; z-index: 1; }
.reset-btn-wrap { margin-top: 24px; display: flex; justify-content: center; }
.reset-btn { font-size: 12px; color: var(--ink3); background: transparent; border: 1px solid var(--border); cursor: pointer; padding: 7px 16px; font-family: var(--sans); border-radius: var(--radius); transition: all 0.15s; }
.reset-btn:hover { color: var(--ink); border-color: rgba(240,237,232,0.25); }
.reset-confirm-wrap { margin-top: 24px; background: var(--accent-light); border: 1px solid var(--accent-border); border-radius: var(--radius-lg); padding: 14px 18px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.reset-confirm-text { font-size: 13px; color: var(--accent); line-height: 1.4; }
.reset-confirm-btns { display: flex; gap: 8px; flex-shrink: 0; }
.reset-confirm-yes { font-size: 12px; padding: 6px 14px; border-radius: var(--radius); border: none; background: var(--accent); color: white; cursor: pointer; font-family: var(--sans); font-weight: 500; }
.reset-confirm-yes:hover { opacity: 0.88; }
.reset-confirm-no { font-size: 12px; padding: 6px 14px; border-radius: var(--radius); border: 1px solid var(--border); background: transparent; color: var(--ink2); cursor: pointer; font-family: var(--sans); }
.reset-confirm-no:hover { background: var(--surface2); }

/* ── Exam ── */
.home-exam-card { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px 20px; margin-bottom: 2rem; transition: all 0.15s; }
.home-exam-card:hover:not([style*="default"]) { border-color: var(--accent-border); background: var(--surface2); }
.exam-match-grid { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; }
.exam-match-row { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--surface2); border-radius: var(--radius); border: 1.5px solid var(--border); transition: border-color 0.2s; }
.exam-match-es { font-weight: 600; font-size: 14px; color: var(--ink); min-width: 140px; flex-shrink: 0; }
.exam-match-select { flex: 1; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 6px 10px; font-size: 13px; color: var(--ink); font-family: var(--sans); cursor: pointer; }
.exam-match-select:focus { outline: none; border-color: var(--accent-border); }
.exam-match-result { flex: 1; font-size: 13px; line-height: 1.4; }

/* ── Auth Modal ── */
.auth-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.65);z-index:1000;display:flex;align-items:center;justify-content:center;padding:1rem;backdrop-filter:blur(4px);}
.auth-modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg, 16px);padding:2rem 2rem 1.75rem;width:100%;max-width:420px;position:relative;max-height:90vh;overflow-y:auto;}
.auth-close{position:absolute;top:1rem;right:1rem;background:transparent;border:none;color:var(--ink3);font-size:16px;cursor:pointer;padding:4px 8px;border-radius:var(--radius);}
.auth-close:hover{color:var(--ink);background:var(--surface2);}
.auth-logo{font-family:var(--serif);font-size:20px;color:var(--ink);letter-spacing:-0.02em;margin-bottom:1.25rem;}
.auth-logo span{color:var(--accent);font-style:italic;}
.auth-title{font-family:var(--serif);font-size:26px;color:var(--ink);margin-bottom:6px;line-height:1.2;}
.auth-sub{font-size:14px;color:var(--ink2);margin-bottom:1.5rem;line-height:1.5;}
.auth-google-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:11px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface2);color:var(--ink);font-family:var(--sans);font-size:14px;font-weight:500;cursor:pointer;transition:all 0.15s;margin-bottom:1rem;}
.auth-google-btn:hover{border-color:rgba(240,237,232,0.3);background:var(--surface3);}
.auth-divider{display:flex;align-items:center;gap:10px;margin-bottom:1rem;color:var(--ink3);font-size:12px;}
.auth-divider::before,.auth-divider::after{content:'';flex:1;height:1px;background:var(--border);}
.auth-error{background:var(--accent-light);border:1px solid var(--accent-border);color:var(--accent);border-radius:var(--radius);padding:8px 12px;font-size:13px;margin-bottom:1rem;}
.auth-field{margin-bottom:1rem;}
.auth-field label{display:block;font-size:12px;color:var(--ink2);margin-bottom:5px;font-weight:500;letter-spacing:0.02em;}
.auth-field input,.auth-field select{width:100%;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;font-size:14px;color:var(--ink);font-family:var(--sans);transition:border-color 0.15s;}
.auth-field input:focus,.auth-field select:focus{outline:none;border-color:var(--accent-border);}
.auth-field input::placeholder{color:var(--ink3);}
.auth-optional{color:var(--ink3);font-weight:400;}
.auth-submit-btn{width:100%;padding:12px;border-radius:var(--radius);border:none;background:var(--accent);color:white;font-family:var(--sans);font-size:15px;font-weight:500;cursor:pointer;transition:opacity 0.15s;margin-top:0.25rem;}
.auth-submit-btn:hover{opacity:0.88;}
.auth-submit-btn:disabled{opacity:0.5;cursor:default;}
.auth-switch{text-align:center;font-size:13px;color:var(--ink3);margin-top:1rem;}
.auth-switch button{background:none;border:none;color:var(--accent);cursor:pointer;font-family:var(--sans);font-size:13px;padding:0;}
.auth-radio-group{display:flex;gap:12px;flex-wrap:wrap;}
.auth-radio{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--ink2);cursor:pointer;}
.auth-radio input{accent-color:var(--accent);}
.auth-upgrade-price{text-align:center;padding:1.25rem 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin:1.25rem 0;}
.auth-price-amount{font-family:var(--serif);font-size:48px;color:var(--ink);letter-spacing:-0.02em;}
.auth-price-period{font-size:16px;color:var(--ink3);}
.auth-upgrade-features{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:1.5rem;}
.auth-upgrade-features li{font-size:14px;color:var(--ink2);}
/* Nav user button */
.nav-user-btn{font-size:12px;padding:6px 14px;border-radius:var(--radius);border:1px solid var(--border);cursor:pointer;color:var(--ink2);background:var(--surface2);font-family:var(--sans);transition:all 0.15s;white-space:nowrap;}
.nav-user-btn:hover{color:var(--ink);border-color:rgba(240,237,232,0.3);}