:root {
  --bg: #0a0d13;
  --bg-2: #0f131c;
  --panel: #131826;
  --panel-2: #1a2133;
  --border: rgba(148, 163, 214, 0.14);
  --text: #e7ecf6;
  --text-dim: #8b95ad;
  --accent: #5b8cff;
  --accent-2: #37d8c3;
  --grad: linear-gradient(120deg, #5b8cff, #37d8c3);
  --new-bg: rgba(80, 145, 255, 0.22);
  --new-border: rgba(80, 145, 255, 0.55);
  --learn-bg: rgba(255, 199, 66, 0.28);
  --learn-border: rgba(255, 199, 66, 0.6);
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  font-size: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, Roboto, sans-serif;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(91, 140, 255, 0.12), transparent 60%),
    radial-gradient(900px 400px at 5% 110%, rgba(55, 216, 195, 0.08), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 28px;
  padding: 14px 28px;
  background: rgba(10, 13, 19, 0.8);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; letter-spacing: 0.2px; cursor: pointer; user-select: none; }
.brand em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--grad); color: #061019;
  display: grid; place-items: center; font-weight: 800;
  box-shadow: 0 4px 14px rgba(91, 140, 255, 0.4);
}
.nav { display: flex; gap: 6px; }
.nav-btn {
  background: none; border: none; color: var(--text-dim);
  font: inherit; font-weight: 600; padding: 8px 14px; border-radius: 10px; cursor: pointer;
  transition: 0.15s;
}
.nav-btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav-btn.active { color: var(--text); background: rgba(91, 140, 255, 0.15); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }

.stat-pills { display: flex; gap: 8px; }
.pill {
  display: flex; align-items: center; gap: 7px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-dim); white-space: nowrap;
}
.pill b { color: var(--text); font-variant-numeric: tabular-nums; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.known { background: #4ade80; }
.dot.learning { background: #fbbf24; }
.dot.streak { background: #f97360; }

.lang-select, select, input, textarea {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  font: inherit; padding: 8px 12px; outline: none;
}
select:focus, input:focus, textarea:focus { border-color: var(--accent); }
.lang-select { font-weight: 600; cursor: pointer; }

/* ---------- main layout ---------- */
main { max-width: 1180px; margin: 0 auto; padding: 34px 28px 80px; }
.view-head { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.view-head h1 { font-size: 1.7rem; letter-spacing: -0.3px; }
.view-head .spacer { flex: 1; }

.btn {
  border: 1px solid var(--border); background: var(--panel);
  color: var(--text); font: inherit; font-weight: 600;
  padding: 10px 18px; border-radius: 11px; cursor: pointer;
  transition: 0.15s;
}
.btn:hover { background: var(--panel-2); }
.btn.primary {
  background: var(--grad); border: none; color: #061019;
  box-shadow: 0 6px 20px rgba(91, 140, 255, 0.35);
}
.btn.primary:hover { filter: brightness(1.1); }
.btn.wide { width: 100%; padding: 13px; font-size: 1rem; }
.btn.ghost { background: transparent; }
.btn.danger:hover { border-color: #f87171; color: #f87171; }
.icon-btn {
  background: none; border: none; color: var(--text-dim); font-size: 1rem;
  cursor: pointer; padding: 6px 9px; border-radius: 8px;
}
.icon-btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }

/* ---------- library ---------- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.course-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; cursor: pointer; transition: 0.18s; position: relative;
}
.course-card:hover { transform: translateY(-3px); border-color: rgba(91, 140, 255, 0.4); box-shadow: var(--shadow); }
.course-cover { height: 108px; position: relative; }
.course-cover::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, var(--panel));
}
.course-cover .cover-letter {
  position: absolute; left: 18px; bottom: 6px;
  font-size: 2.6rem; font-weight: 800; color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}
.course-body { padding: 4px 18px 16px; }
.course-body h3 { font-size: 1.05rem; margin-bottom: 6px; line-height: 1.3; }
.course-meta { color: var(--text-dim); font-size: 0.82rem; display: flex; gap: 12px; flex-wrap: wrap; }
.course-lang-badge {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  background: rgba(6, 12, 20, 0.65); backdrop-filter: blur(6px);
  padding: 4px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.8px;
}
.course-delete { position: absolute; top: 10px; left: 10px; z-index: 2; opacity: 0; transition: 0.15s; }
.course-card:hover .course-delete { opacity: 1; }
.progress-track { height: 4px; background: rgba(255, 255, 255, 0.07); border-radius: 4px; margin-top: 12px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--grad); border-radius: 4px; }

.empty-state {
  text-align: center; padding: 90px 20px; color: var(--text-dim);
  border: 1.5px dashed var(--border); border-radius: var(--radius);
}
.empty-state .big { font-size: 2.6rem; margin-bottom: 12px; }
.empty-state h2 { color: var(--text); margin-bottom: 8px; }
.empty-state p { max-width: 440px; margin: 0 auto 20px; line-height: 1.5; }

/* ---------- course detail ---------- */
.lesson-list { display: flex; flex-direction: column; gap: 10px; }
.lesson-row {
  display: flex; align-items: center; gap: 16px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 15px 20px; cursor: pointer; transition: 0.15s;
}
.lesson-row:hover { border-color: rgba(91, 140, 255, 0.4); background: var(--panel-2); }
.lesson-num {
  width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0;
  display: grid; place-items: center; font-weight: 700; font-size: 0.85rem;
  background: rgba(91, 140, 255, 0.14); color: var(--accent);
}
.lesson-row.done .lesson-num { background: rgba(74, 222, 128, 0.15); color: #4ade80; }
.lesson-row .grow { flex: 1; }
.lesson-row .meta { color: var(--text-dim); font-size: 0.82rem; }
.back-link { color: var(--text-dim); text-decoration: none; font-weight: 600; cursor: pointer; background: none; border: none; font: inherit; padding: 0; }
.back-link:hover { color: var(--accent); }

/* ---------- reader ---------- */
.reader-wrap { max-width: 760px; margin: 0 auto; }
.reader-toolbar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 22px; flex-wrap: wrap;
}
.reader-toolbar .title { font-weight: 700; font-size: 1.05rem; flex: 1; min-width: 200px; }
.reader-toolbar .title small { display: block; color: var(--text-dim); font-weight: 500; font-size: 0.78rem; margin-top: 2px; }
.mode-toggle { display: flex; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.mode-toggle button { background: none; border: none; color: var(--text-dim); font: inherit; font-size: 0.85rem; font-weight: 600; padding: 8px 13px; cursor: pointer; }
.mode-toggle button.active { background: rgba(91, 140, 255, 0.18); color: var(--text); }

.reader-page {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 40px 46px; min-height: 420px;
  font-size: 1.22rem; line-height: 2.05; letter-spacing: 0.1px;
  box-shadow: var(--shadow);
}
.reader-page p { margin-bottom: 1.1em; }

.w {
  cursor: pointer; border-radius: 5px; padding: 1px 2px; margin: 0 -2px;
  transition: background 0.12s, box-shadow 0.12s;
}
.w.new { background: var(--new-bg); box-shadow: inset 0 -2px 0 var(--new-border); }
.w.l1 { background: var(--learn-bg); box-shadow: inset 0 -2px 0 var(--learn-border); }
.w.l2 { background: rgba(255, 199, 66, 0.21); box-shadow: inset 0 -2px 0 rgba(255, 199, 66, 0.45); }
.w.l3 { background: rgba(255, 199, 66, 0.13); box-shadow: inset 0 -2px 0 rgba(255, 199, 66, 0.32); }
.w.l4 { background: rgba(255, 199, 66, 0.06); box-shadow: inset 0 -2px 0 rgba(255, 199, 66, 0.22); }
.w:hover { background: rgba(91, 140, 255, 0.32); }
.w.selected { background: rgba(91, 140, 255, 0.45); box-shadow: 0 0 0 2px rgba(91, 140, 255, 0.55); }
.phrase-hl { background: rgba(139, 92, 246, 0.3); border-radius: 5px; }

.reader-nav {
  display: flex; align-items: center; justify-content: space-between; margin-top: 20px;
}
.page-info { color: var(--text-dim); font-size: 0.85rem; font-variant-numeric: tabular-nums; }
.reader-nav .btns { display: flex; gap: 8px; }

.sentence-block { text-align: center; padding: 30px 10px; }
.sentence-translation {
  margin-top: 26px; padding: 16px 20px; border-radius: 12px;
  background: rgba(55, 216, 195, 0.08); border: 1px solid rgba(55, 216, 195, 0.25);
  color: var(--accent-2); font-size: 1rem; line-height: 1.6;
}

.kbd-hints { display: flex; gap: 14px; justify-content: center; margin-top: 26px; color: var(--text-dim); font-size: 0.75rem; flex-wrap: wrap; }
.kbd-hints kbd {
  background: var(--panel-2); border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 5px; padding: 1px 6px; font-family: ui-monospace, monospace; font-size: 0.72rem;
}

/* ---------- word popup ---------- */
.word-popup {
  position: absolute; z-index: 100; width: 320px;
  background: rgba(19, 24, 38, 0.97); backdrop-filter: blur(16px);
  border: 1px solid rgba(91, 140, 255, 0.35); border-radius: 16px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.6);
  padding: 16px;
  animation: pop 0.14s ease-out;
}
@keyframes pop { from { opacity: 0; transform: translateY(6px) scale(0.97); } }
.word-popup .wp-term { font-size: 1.25rem; font-weight: 700; margin-bottom: 2px; }
.word-popup .wp-sub { color: var(--text-dim); font-size: 0.75rem; margin-bottom: 12px; }
.wp-translation {
  width: 100%; background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 12px; color: var(--accent-2);
  font: inherit; font-size: 0.95rem; resize: vertical; min-height: 42px;
}
.wp-loading { color: var(--text-dim); font-size: 0.85rem; padding: 8px 0; }
.wp-alts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.wp-alt {
  background: rgba(91, 140, 255, 0.1); border: 1px solid rgba(91, 140, 255, 0.25);
  color: var(--text); font-size: 0.78rem; padding: 4px 10px; border-radius: 999px; cursor: pointer;
}
.wp-alt:hover { background: rgba(91, 140, 255, 0.25); }
.wp-alt small { color: var(--text-dim); }
.wp-statuses { display: flex; gap: 6px; margin-top: 14px; }
.wp-status {
  flex: 1; padding: 8px 0; border-radius: 9px; border: 1px solid var(--border);
  background: var(--bg-2); color: var(--text-dim); font-weight: 700; font-size: 0.85rem; cursor: pointer;
  transition: 0.12s;
}
.wp-status:hover { border-color: rgba(255, 199, 66, 0.6); color: var(--text); }
.wp-status.active { background: rgba(255, 199, 66, 0.22); border-color: rgba(255, 199, 66, 0.7); color: #ffd875; }
.wp-status.known-btn:hover, .wp-status.known-btn.active { background: rgba(74, 222, 128, 0.16); border-color: rgba(74, 222, 128, 0.6); color: #4ade80; }
.wp-status.ignore-btn:hover, .wp-status.ignore-btn.active { border-color: rgba(148, 163, 214, 0.5); color: var(--text); }
.wp-labels { display: flex; gap: 6px; margin-top: 5px; }
.wp-labels span { flex: 1; text-align: center; font-size: 0.6rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.4px; }

/* ---------- vocabulary ---------- */
.vocab-controls { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.vocab-controls input[type="search"] { flex: 1; min-width: 220px; }
.filter-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--border); background: var(--panel); color: var(--text-dim);
  font: inherit; font-size: 0.82rem; font-weight: 600; padding: 8px 14px; border-radius: 999px; cursor: pointer;
}
.chip.active { background: rgba(91, 140, 255, 0.18); border-color: rgba(91, 140, 255, 0.5); color: var(--text); }

.vocab-table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.vocab-table th {
  text-align: left; padding: 12px 16px; color: var(--text-dim);
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.8px;
  border-bottom: 1px solid var(--border); background: var(--bg-2);
}
.vocab-table td { padding: 11px 16px; border-bottom: 1px solid rgba(148, 163, 214, 0.07); vertical-align: middle; }
.vocab-table tr:last-child td { border-bottom: none; }
.vocab-table .term-cell { font-weight: 700; }
.vocab-table .ctx { color: var(--text-dim); font-size: 0.8rem; max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vocab-table .trans-input { width: 100%; background: transparent; border: 1px solid transparent; color: var(--accent-2); padding: 5px 8px; border-radius: 7px; }
.vocab-table .trans-input:hover { border-color: var(--border); }
.vocab-table .trans-input:focus { border-color: var(--accent); background: var(--bg-2); }
.status-select { font-size: 0.8rem; padding: 5px 8px; }
.status-badge { font-size: 0.72rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
.status-badge.s1, .status-badge.s2, .status-badge.s3, .status-badge.s4 { background: rgba(255, 199, 66, 0.15); color: #ffd875; }
.status-badge.s5 { background: rgba(74, 222, 128, 0.14); color: #4ade80; }
.status-badge.s0 { background: rgba(148, 163, 214, 0.12); color: var(--text-dim); }

/* ---------- review (flashcards) ---------- */
.review-card {
  max-width: 480px; margin: 40px auto; text-align: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 20px;
  padding: 54px 34px; box-shadow: var(--shadow); cursor: pointer;
}
.review-card .rc-term { font-size: 2.1rem; font-weight: 800; }
.review-card .rc-answer { font-size: 1.3rem; color: var(--accent-2); margin-top: 18px; }
.review-card .rc-hint { color: var(--text-dim); font-size: 0.8rem; margin-top: 26px; }
.review-actions { display: flex; gap: 12px; justify-content: center; margin-top: 24px; }
.review-progress { text-align: center; color: var(--text-dim); font-size: 0.85rem; margin-top: 18px; }

/* ---------- modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(5, 8, 14, 0.72); backdrop-filter: blur(6px);
  display: grid; place-items: center; padding: 20px;
}
.modal {
  width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto;
  background: var(--panel); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow);
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px 0; }
.modal-head h2 { font-size: 1.25rem; }
.import-tabs { display: flex; gap: 4px; padding: 16px 24px 0; border-bottom: 1px solid var(--border); }
.import-tab {
  background: none; border: none; color: var(--text-dim); font: inherit; font-weight: 600;
  padding: 10px 16px; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.import-tab.active { color: var(--text); border-bottom-color: var(--accent); }
.modal-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field > span { font-size: 0.82rem; font-weight: 600; color: var(--text-dim); }
.field small { font-weight: 400; }
textarea { resize: vertical; font-size: 0.92rem; line-height: 1.5; }

.dropzone {
  border: 1.5px dashed rgba(91, 140, 255, 0.4); border-radius: 14px;
  padding: 34px 20px; text-align: center; cursor: pointer; transition: 0.15s;
}
.dropzone:hover, .dropzone.drag { background: rgba(91, 140, 255, 0.07); border-color: var(--accent); }
.dropzone-icon { font-size: 1.8rem; margin-bottom: 8px; color: var(--accent); }
.dropzone p { margin-bottom: 4px; }
.file-picked { color: var(--accent-2); font-weight: 600; margin-top: 8px; }
.muted { color: var(--text-dim); font-size: 0.8rem; line-height: 1.5; }
.import-error {
  background: rgba(248, 113, 113, 0.1); border: 1px solid rgba(248, 113, 113, 0.4);
  color: #fca5a5; padding: 11px 14px; border-radius: 10px; font-size: 0.87rem;
}

.hidden { display: none !important; }

.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 300;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 22px; font-weight: 600; box-shadow: var(--shadow);
  animation: toast-in 0.2s ease-out;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 10px); } }

.spinner {
  width: 16px; height: 16px; border: 2px solid rgba(255,255,255,0.25); border-top-color: #061019;
  border-radius: 50%; display: inline-block; vertical-align: -3px; margin-right: 8px;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ================= v2: profiles, insights, difficulty ================= */

/* ---------- known counter (always visible) ---------- */
.known-counter {
  display: flex; align-items: baseline; gap: 6px;
  padding: 7px 14px; border-radius: 11px;
  background: linear-gradient(120deg, rgba(74, 222, 128, 0.14), rgba(55, 216, 195, 0.1));
  border: 1px solid rgba(74, 222, 128, 0.35);
  white-space: nowrap;
}
.known-counter b { font-size: 1.05rem; color: #4ade80; font-variant-numeric: tabular-nums; }
.known-counter span { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.6px; }
.known-counter.bump b { animation: bump 0.35s ease; }
@keyframes bump { 40% { transform: scale(1.25); } }

/* ---------- profiles ---------- */
.avatar {
  width: 36px; height: 36px; border-radius: 50%; border: 2px solid var(--border);
  color: #061019; font-weight: 800; font-size: 0.95rem; cursor: pointer;
  display: grid; place-items: center; flex-shrink: 0;
}
.avatar:hover { filter: brightness(1.15); }
.profile-menu {
  position: fixed; top: 60px; right: 20px; z-index: 250; min-width: 220px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); padding: 8px; animation: pop 0.14s ease-out;
}
.profile-menu .pm-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: none; border: none; color: var(--text); font: inherit;
  padding: 9px 10px; border-radius: 9px; cursor: pointer; text-align: left;
}
.profile-menu .pm-item:hover { background: rgba(255, 255, 255, 0.06); }
.profile-menu .pm-item.active { background: rgba(91, 140, 255, 0.14); }
.profile-menu .pm-avatar { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-size: 0.75rem; font-weight: 800; color: #061019; }
.profile-menu .pm-sub { color: var(--text-dim); font-size: 0.72rem; }

.profile-gate {
  position: fixed; inset: 0; z-index: 400; background: var(--bg);
  display: grid; place-items: center; padding: 20px;
}
.profile-gate-inner { text-align: center; max-width: 420px; width: 100%; }
.profile-gate h1 { margin: 10px 0 26px; font-size: 1.6rem; }
.profile-list { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; margin-bottom: 26px; }
.profile-tile { background: none; border: none; cursor: pointer; color: var(--text); font: inherit; }
.profile-tile .pt-avatar {
  width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 8px;
  display: grid; place-items: center; font-size: 1.6rem; font-weight: 800; color: #061019;
  border: 3px solid transparent; transition: 0.15s;
}
.profile-tile:hover .pt-avatar { border-color: var(--accent); transform: scale(1.05); }
.profile-create { display: flex; flex-direction: column; gap: 14px; text-align: left; margin-bottom: 16px; }
.profile-create input[type="text"] { font-size: 1.05rem; padding: 12px 14px; }
.color-swatches { display: flex; gap: 10px; justify-content: center; }
.color-swatches button { width: 30px; height: 30px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; }
.color-swatches button.active { border-color: #fff; transform: scale(1.15); }

/* ---------- difficulty badges ---------- */
.diff-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.75rem; font-weight: 700; padding: 3px 10px; border-radius: 999px;
  border: 1px solid; white-space: nowrap;
}
.diff-1 { color: #4ade80; border-color: rgba(74, 222, 128, 0.4); background: rgba(74, 222, 128, 0.08); }
.diff-2 { color: #a3e635; border-color: rgba(163, 230, 53, 0.4); background: rgba(163, 230, 53, 0.08); }
.diff-3 { color: #fbbf24; border-color: rgba(251, 191, 36, 0.4); background: rgba(251, 191, 36, 0.08); }
.diff-4 { color: #fb923c; border-color: rgba(251, 146, 60, 0.4); background: rgba(251, 146, 60, 0.08); }
.diff-5 { color: #f87171; border-color: rgba(248, 113, 113, 0.4); background: rgba(248, 113, 113, 0.08); }
.diff-badge .pct { font-weight: 500; opacity: 0.8; }

/* ---------- CEFR ---------- */
.cefr-badge {
  display: inline-flex; align-items: center;
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.5px;
  padding: 3px 9px; border-radius: 7px; border: 1px solid; white-space: nowrap;
}
.cefr-A0 { color: #8b95ad; border-color: rgba(139, 149, 173, 0.4); background: rgba(139, 149, 173, 0.08); }
.cefr-A1 { color: #4ade80; border-color: rgba(74, 222, 128, 0.45); background: rgba(74, 222, 128, 0.08); }
.cefr-A2 { color: #a3e635; border-color: rgba(163, 230, 53, 0.45); background: rgba(163, 230, 53, 0.08); }
.cefr-B1 { color: #fbbf24; border-color: rgba(251, 191, 36, 0.45); background: rgba(251, 191, 36, 0.08); }
.cefr-B2 { color: #fb923c; border-color: rgba(251, 146, 60, 0.45); background: rgba(251, 146, 60, 0.08); }
.cefr-C1 { color: #f472b6; border-color: rgba(244, 114, 182, 0.45); background: rgba(244, 114, 182, 0.08); }
.cefr-C2 { color: #a78bfa; border-color: rgba(167, 139, 250, 0.45); background: rgba(167, 139, 250, 0.08); }

.badge-row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

.cefr-hero { text-align: center; padding-top: 24px; }
.cefr-hero .ch-level {
  font-size: 3.2rem; font-weight: 800; letter-spacing: -1px; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.cefr-hero .ch-label { color: var(--text-dim); font-size: 0.85rem; margin-top: 6px; }
.cefr-hero .ch-progress { margin: 18px 0 8px; }
.cefr-hero .ch-next { font-size: 0.8rem; color: var(--text-dim); }
.cefr-hero .ch-next b { color: var(--text); }
.cefr-scale { display: flex; gap: 4px; margin-top: 16px; }
.cefr-scale span {
  flex: 1; text-align: center; font-size: 0.66rem; font-weight: 700; padding: 4px 0;
  border-radius: 6px; background: var(--bg-2); color: var(--text-dim); border: 1px solid transparent;
}
.cefr-scale span.hit { border-color: currentColor; }

/* ---------- insights dashboard ---------- */
.insight-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.icard {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; grid-column: span 4; min-width: 0;
}
.icard.span6 { grid-column: span 6; }
.icard.span8 { grid-column: span 8; }
.icard.span12 { grid-column: span 12; }
.icard h3 {
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.9px;
  color: var(--text-dim); margin-bottom: 12px; font-weight: 700;
}
.icard h3 .hint { text-transform: none; letter-spacing: 0; font-weight: 400; float: right; }
.icard svg { display: block; width: 100%; height: auto; }

.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px;
}
.stat-card .sc-value { font-size: 1.65rem; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -0.5px; }
.stat-card .sc-value small { font-size: 0.85rem; font-weight: 600; color: var(--text-dim); }
.stat-card .sc-label { color: var(--text-dim); font-size: 0.75rem; margin-top: 3px; }
.stat-card.green .sc-value { color: #4ade80; }
.stat-card.yellow .sc-value { color: #fbbf24; }
.stat-card.blue .sc-value { color: var(--accent); }
.stat-card.red .sc-value { color: #f87171; }
.stat-card.teal .sc-value { color: var(--accent-2); }

.forecast-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.forecast-chip {
  background: rgba(91, 140, 255, 0.08); border: 1px solid rgba(91, 140, 255, 0.3);
  border-radius: 999px; padding: 5px 13px; font-size: 0.78rem; color: var(--text);
}
.forecast-chip b { color: var(--accent); }

.ilist { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.ilist li {
  display: flex; align-items: center; gap: 10px; font-size: 0.87rem;
  padding: 7px 10px; border-radius: 9px; background: var(--bg-2);
}
.ilist .term { font-weight: 700; }
.ilist .sub { color: var(--text-dim); font-size: 0.76rem; margin-left: auto; text-align: right; }
.ilist-empty { color: var(--text-dim); font-size: 0.85rem; padding: 12px 0; }

.pos-rows { display: flex; flex-direction: column; gap: 8px; }
.pos-row { display: grid; grid-template-columns: 90px 1fr auto; align-items: center; gap: 10px; font-size: 0.82rem; }
.pos-row .pr-label { color: var(--text-dim); text-transform: capitalize; }
.pos-row .pr-bar { height: 14px; border-radius: 5px; background: var(--bg-2); overflow: hidden; display: flex; }
.pos-row .pr-known { background: #4ade80cc; }
.pos-row .pr-learning { background: #fbbf24aa; }
.pos-row .pr-nums { color: var(--text-dim); font-variant-numeric: tabular-nums; white-space: nowrap; }

.legend { display: flex; gap: 14px; margin-top: 10px; font-size: 0.74rem; color: var(--text-dim); flex-wrap: wrap; }
.legend span { display: flex; align-items: center; gap: 5px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

/* ---------- POS chips in popup ---------- */
.wp-pos { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 10px; }
.wp-pos-chip {
  background: var(--bg-2); border: 1px solid var(--border); color: var(--text-dim);
  font-size: 0.68rem; font-weight: 700; padding: 3px 8px; border-radius: 999px; cursor: pointer;
  text-transform: capitalize;
}
.wp-pos-chip:hover { color: var(--text); border-color: var(--accent); }
.wp-pos-chip.active { background: rgba(91, 140, 255, 0.2); border-color: var(--accent); color: var(--text); }

/* ---------- word journey ---------- */
.journey-head { padding: 22px 24px 6px; }
.journey-head .jh-term { font-size: 1.5rem; font-weight: 800; }
.journey-head .jh-trans { color: var(--accent-2); margin-top: 2px; }
.journey-stats { display: flex; gap: 18px; padding: 12px 24px; flex-wrap: wrap; }
.journey-stats div { font-size: 0.8rem; color: var(--text-dim); }
.journey-stats b { display: block; font-size: 1.05rem; color: var(--text); }
.timeline { padding: 6px 24px 24px; }
.timeline-item { display: flex; gap: 12px; padding: 7px 0; font-size: 0.85rem; align-items: baseline; }
.timeline-item .tl-date { color: var(--text-dim); font-size: 0.74rem; min-width: 118px; font-variant-numeric: tabular-nums; }
.timeline-item .tl-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; align-self: center; }

.vocab-table .pos-cell { color: var(--text-dim); font-size: 0.78rem; text-transform: capitalize; }
.vocab-table tr[data-id] { cursor: pointer; }
.vocab-table tr[data-id]:hover td { background: rgba(91, 140, 255, 0.05); }
.vocab-meta-cell { color: var(--text-dim); font-size: 0.76rem; white-space: nowrap; }

.reader-diff { font-size: 0.78rem; color: var(--text-dim); }

/* ---------- audiobook / TTS ---------- */
.w.speaking {
  background: rgba(55, 216, 195, 0.4) !important;
  box-shadow: 0 0 0 2px rgba(55, 216, 195, 0.55) !important;
  border-radius: 5px;
}
.wp-extra {
  margin-top: 10px; padding: 10px 12px; border-radius: 10px;
  background: rgba(91, 140, 255, 0.06); border: 1px solid rgba(91, 140, 255, 0.2);
  display: flex; flex-direction: column; gap: 5px; font-size: 0.82rem; line-height: 1.45;
}
.wp-extra span {
  color: var(--text-dim); font-size: 0.66rem; text-transform: uppercase;
  letter-spacing: 0.5px; margin-right: 4px;
}
.wp-term .icon-btn { font-size: 0.85rem; vertical-align: 2px; }

/* ---------- AI job progress ---------- */
.ai-progress {
  margin: 12px 0; padding: 12px 16px; border-radius: 12px;
  background: rgba(91, 140, 255, 0.07); border: 1px solid rgba(91, 140, 255, 0.3);
}
.ai-progress-top {
  display: flex; justify-content: space-between; gap: 12px;
  font-size: 0.8rem; margin-bottom: 8px;
}
.ai-progress-top span:first-child { color: var(--text); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ai-progress-top span:last-child { color: var(--text-dim); white-space: nowrap; font-variant-numeric: tabular-nums; }
.ai-progress-track { height: 6px; background: rgba(255, 255, 255, 0.07); border-radius: 6px; overflow: hidden; }
.ai-progress-fill { height: 100%; background: var(--grad); border-radius: 6px; width: 0; transition: width 0.4s ease; }

/* ---------- TTS download strip ---------- */
.tts-progress {
  position: fixed; bottom: 20px; right: 20px; z-index: 300; width: 300px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 16px; box-shadow: var(--shadow);
}
.tts-progress-label { font-size: 0.76rem; color: var(--text-dim); margin-bottom: 7px; }
.tts-progress-track { height: 5px; background: rgba(255, 255, 255, 0.08); border-radius: 5px; overflow: hidden; }
.tts-progress-fill { height: 100%; background: var(--grad); width: 0; transition: width 0.3s; }

/* ---------- chart range selector ---------- */
.range-chips { display: flex; gap: 4px; margin-bottom: 12px; }
.range-chips .chip { padding: 4px 11px; font-size: 0.74rem; }

/* ---------- library v2 ---------- */
.lib-section { margin-bottom: 34px; }
.lib-section h2 { font-size: 1.02rem; margin-bottom: 14px; display: flex; align-items: baseline; }
.lib-count {
  margin-left: 8px; font-size: 0.7rem; font-weight: 700; color: var(--text-dim);
  background: var(--panel); border: 1px solid var(--border); border-radius: 999px; padding: 2px 8px;
}
.course-cover.has-image {
  background-size: cover; background-position: center;
}
.course-cover.has-image::after {
  background: linear-gradient(180deg, rgba(10, 13, 19, 0.05) 20%, var(--panel));
}
.card-footer { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.card-footer .progress-track { margin-top: 0; }
.continue-btn {
  background: rgba(91, 140, 255, 0.14); border: 1px solid rgba(91, 140, 255, 0.4);
  color: var(--accent); font: inherit; font-size: 0.75rem; font-weight: 700;
  padding: 4px 12px; border-radius: 999px; cursor: pointer; white-space: nowrap; transition: 0.15s;
}
.continue-btn:hover { background: rgba(91, 140, 255, 0.28); }
.done-tag { color: #4ade80; font-size: 0.74rem; font-weight: 700; white-space: nowrap; }

.course-hero {
  position: relative; min-height: 240px; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--border); display: flex; box-shadow: var(--shadow);
}
.course-hero-img {
  position: absolute; inset: 0; background-size: cover; background-position: center 22%;
}
.course-hero-body {
  position: relative; margin-top: auto; width: 100%; padding: 30px 26px 22px;
  background: linear-gradient(180deg, transparent, rgba(10, 13, 19, 0.5) 42%, rgba(10, 13, 19, 0.94));
}
.course-hero-body h1 { font-size: 1.85rem; letter-spacing: -0.4px; line-height: 1.22; text-shadow: 0 2px 18px rgba(0, 0, 0, 0.7); }
.course-hero-body .course-meta { margin-top: 9px; color: #c8d0e4; }
.course-plainhead { margin-bottom: 4px; }
.course-plainhead h1 { font-size: 1.7rem; letter-spacing: -0.3px; }
.course-plainhead .course-meta { margin-top: 8px; }
.course-actions { display: flex; gap: 10px; margin: 18px 0 4px; flex-wrap: wrap; }

.reader-progress-track {
  height: 3px; background: rgba(255, 255, 255, 0.06); border-radius: 3px;
  margin-bottom: 10px; overflow: hidden;
}
.reader-progress-fill {
  height: 100%; background: var(--grad); border-radius: 3px; width: 0;
  transition: width 0.25s ease;
}

/* ---------- discover ---------- */
.discover-topic { font-size: 0.95rem; margin: 26px 0 12px; color: var(--text); }
.discover-topic:first-child { margin-top: 0; }
.source-list { display: flex; flex-direction: column; gap: 10px; }
.source-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 13px;
  padding: 13px 18px; transition: 0.15s;
}
.source-card:hover { border-color: rgba(91, 140, 255, 0.35); }
.source-head { display: flex; align-items: center; gap: 12px; }
.source-head .grow { flex: 1; }
.source-items { margin-top: 12px; border-top: 1px solid var(--border); padding-top: 6px; }
.feed-item {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 4px; border-bottom: 1px solid rgba(148, 163, 214, 0.07);
}
.feed-item:last-child { border-bottom: none; }
.feed-item .grow { flex: 1; min-width: 0; }
.fi-title { font-weight: 600; font-size: 0.92rem; line-height: 1.35; }
.fi-meta { color: var(--text-dim); font-size: 0.76rem; margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fi-badges { display: flex; align-items: center; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.fi-badges .cefr-badge { font-size: 0.66rem; padding: 2px 7px; }
.fi-badges .diff-badge { font-size: 0.68rem; padding: 2px 8px; }
.fi-words { color: var(--text-dim); font-size: 0.7rem; }
.fi-analyzing { color: var(--text-dim); font-size: 0.7rem; animation: pulse-dim 1.4s ease-in-out infinite; }
@keyframes pulse-dim { 50% { opacity: 0.35; } }

/* ---------- billing / plans ---------- */
.points-wallet {
  display: flex; flex-direction: column; gap: 2px;
  background: linear-gradient(120deg, rgba(91, 140, 255, 0.12), rgba(55, 216, 195, 0.1));
  border: 1px solid rgba(91, 140, 255, 0.3); border-radius: 14px; padding: 16px 20px;
}
.pw-balance { font-size: 1.1rem; color: var(--text-dim); }
.pw-balance span { font-size: 2.1rem; font-weight: 800; color: var(--text); letter-spacing: -0.5px; }
.pw-sub { color: var(--text-dim); font-size: 0.82rem; }

/* admin usage rows */
.usage-rows { display: flex; flex-direction: column; gap: 4px; }
.usage-row { display: flex; justify-content: space-between; gap: 16px; font-size: 0.86rem; padding: 3px 0; }
.usage-row span { color: var(--text-dim); }
.usage-row b { font-variant-numeric: tabular-nums; }

/* voice picker: fixed height, ellipsis for long names — never grows the box */
.voice-select {
  width: 100%; height: 40px; box-sizing: border-box;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.plan-box {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px; display: flex; flex-direction: column; gap: 8px;
}
.plan-box.active { border-color: rgba(74, 222, 128, 0.55); background: rgba(74, 222, 128, 0.05); }
.plan-box .pb-name { font-weight: 700; }
.plan-box .pb-price { font-size: 1.6rem; font-weight: 800; }
.plan-box .pb-price small { font-size: 0.8rem; color: var(--text-dim); font-weight: 500; }
.plan-box .muted { flex: 1; line-height: 1.45; font-size: 0.78rem; }

/* ---------- live AI translation ---------- */
.reader-page.translating p { transition: opacity 0.3s; }
.tr-pending { opacity: 0.32; font-style: italic; }
.tr-done { animation: tr-flash 1.2s ease-out; }
@keyframes tr-flash {
  0% { background: rgba(55, 216, 195, 0.22); opacity: 0; transform: translateY(4px); }
  100% { background: transparent; opacity: 1; transform: none; }
}
.ai-translated-badge {
  position: absolute; top: 12px; right: 52px; z-index: 2;
  background: rgba(30, 12, 40, 0.75); backdrop-filter: blur(6px);
  color: #c084fc; border: 1px solid rgba(192, 132, 252, 0.5);
  padding: 4px 10px; border-radius: 999px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.4px; white-space: nowrap;
}

/* ---------- book shelves ---------- */
.shelf { margin-bottom: 32px; }
.shelf h2 { font-size: 0.98rem; margin-bottom: 14px; }
.shelf h2 .hint { font-weight: 400; color: var(--text-dim); font-size: 0.76rem; margin-left: 8px; }
.shelf-row {
  display: flex; gap: 16px; overflow-x: auto; padding-bottom: 10px;
  scrollbar-width: thin;
}
.book-card { width: 132px; flex-shrink: 0; cursor: pointer; transition: transform 0.15s; }
.book-card:hover { transform: translateY(-4px); }
.book-cover-wrap { position: relative; }
.owned-badge {
  position: absolute; top: 8px; left: 8px;
  background: rgba(6, 16, 12, 0.85); backdrop-filter: blur(4px);
  color: #4ade80; border: 1px solid rgba(74, 222, 128, 0.5);
  font-size: 0.62rem; font-weight: 800; letter-spacing: 0.3px;
  padding: 3px 8px; border-radius: 999px;
}
.nplus-badge {
  position: absolute; bottom: 8px; left: 8px; right: 8px; text-align: center;
  background: rgba(20, 14, 2, 0.88); backdrop-filter: blur(4px);
  color: #fbbf24; border: 1px solid rgba(251, 191, 36, 0.55);
  font-size: 0.6rem; font-weight: 800; letter-spacing: 0.3px;
  padding: 3px 6px; border-radius: 999px; white-space: nowrap; overflow: hidden;
}
.nplus-callout {
  margin-top: 12px; padding: 10px 14px; border-radius: 10px;
  background: rgba(251, 191, 36, 0.08); border: 1px solid rgba(251, 191, 36, 0.35);
  font-size: 0.84rem; line-height: 1.5;
}
.nplus-callout b { color: #fbbf24; }
.bm-stats { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 10px; }
.bm-stat { color: var(--text-dim); font-size: 0.76rem; white-space: nowrap; }
.bm-desc { margin-top: 12px; font-size: 0.86rem; line-height: 1.55; color: var(--text); opacity: 0.92; }
.book-cover {
  width: 132px; height: 198px; object-fit: cover; border-radius: 10px;
  background: var(--panel-2); border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35); display: block;
}
.book-title {
  font-size: 0.8rem; font-weight: 600; margin-top: 9px; line-height: 1.3;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.book-author { font-size: 0.72rem; color: var(--text-dim); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-rating { font-size: 0.72rem; color: #fbbf24; margin-top: 3px; }
.book-rating span { color: var(--text-dim); }

.book-modal { display: flex; gap: 22px; padding: 10px 24px 26px; }
.bm-cover {
  width: 170px; height: 255px; object-fit: cover; border-radius: 12px; flex-shrink: 0;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.bm-info { min-width: 0; }
.bm-info h2 { font-size: 1.25rem; line-height: 1.3; }
.bm-author { color: var(--text-dim); margin-top: 4px; }
.bm-subjects { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.bm-subjects span {
  font-size: 0.7rem; color: var(--text-dim); background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 999px; padding: 3px 10px;
}
.bm-actions { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.bm-actions .btn { text-decoration: none; text-align: center; }
@media (max-width: 640px) {
  .book-modal { flex-direction: column; align-items: center; text-align: center; }
  .bm-subjects { justify-content: center; }
}

@media (max-width: 900px) {
  .icard, .icard.span6, .icard.span8 { grid-column: span 12; }
}

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; gap: 10px; padding: 12px 16px; }
  .stat-pills { display: none; }
  main { padding: 20px 16px 60px; }
  .reader-page { padding: 26px 22px; font-size: 1.1rem; }
  .view-head { flex-wrap: wrap; }
  .view-head input[type="search"] { order: 3; width: 100% !important; }
}

/* ================= landing + auth pages ================= */
body.landing { max-width: none; }
.landing-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 32px; max-width: 1100px; margin: 0 auto;
}
.landing-nav-links { display: flex; gap: 10px; }
.landing-main { max-width: 1000px; margin: 0 auto; padding: 0 24px 40px; }
.hero { text-align: center; padding: 70px 10px 60px; }
.hero-badge {
  display: inline-block; font-size: 0.8rem; font-weight: 600; color: var(--accent-2);
  background: rgba(55, 216, 195, 0.1); border: 1px solid rgba(55, 216, 195, 0.3);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 24px;
}
.hero h1 { font-size: 2.9rem; line-height: 1.12; letter-spacing: -1px; margin-bottom: 20px; }
.hero-sub { max-width: 620px; margin: 0 auto 30px; color: var(--text-dim); font-size: 1.12rem; line-height: 1.6; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn.big { padding: 14px 26px; font-size: 1.02rem; border-radius: 13px; }
.hero-note { color: var(--text-dim); font-size: 0.85rem; margin-top: 18px; }

.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px; margin-top: 40px;
}
.feature {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px;
}
.feature-icon { font-size: 1.8rem; margin-bottom: 12px; }
.feature h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature p { color: var(--text-dim); line-height: 1.55; font-size: 0.92rem; }

.landing-cta {
  text-align: center; margin: 70px auto 20px; max-width: 640px;
  background: linear-gradient(120deg, rgba(91,140,255,0.1), rgba(55,216,195,0.08));
  border: 1px solid var(--border); border-radius: 20px; padding: 46px 24px;
}
.landing-cta h2 { font-size: 1.7rem; margin-bottom: 22px; letter-spacing: -0.3px; }
.landing-footer {
  display: flex; gap: 14px; align-items: center; justify-content: center; flex-wrap: wrap;
  padding: 30px; color: var(--text-dim); border-top: 1px solid var(--border); margin-top: 40px;
}
.landing-footer em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* auth card */
.auth-wrap { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; padding: 24px; }
.auth-card {
  width: 100%; max-width: 400px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 18px; padding: 26px; box-shadow: var(--shadow);
}
.auth-tabs { display: flex; gap: 4px; background: var(--bg-2); border-radius: 11px; padding: 4px; margin-bottom: 20px; }
.auth-tab {
  flex: 1; background: none; border: none; color: var(--text-dim); font: inherit; font-weight: 600;
  padding: 9px; border-radius: 8px; cursor: pointer;
}
.auth-tab.active { background: var(--panel-2); color: var(--text); }
.auth-or { display: flex; align-items: center; gap: 12px; margin: 16px 0; color: var(--text-dim); font-size: 0.82rem; }
.auth-or::before, .auth-or::after { content: ""; flex: 1; height: 1px; background: var(--border); }
#gButton { display: flex; justify-content: center; }
#authForm { display: flex; flex-direction: column; gap: 14px; }
.auth-error {
  background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.4);
  color: #fca5a5; padding: 10px 13px; border-radius: 10px; font-size: 0.87rem;
}
.auth-switch { text-align: center; margin-top: 16px; font-size: 0.88rem; }
.auth-switch a { color: var(--accent); }

@media (max-width: 640px) { .hero h1 { font-size: 2.1rem; } }

/* ---------- AI toggle switch (reader) ---------- */
.ai-switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.85rem; font-weight: 600; color: var(--text-dim); user-select: none; }
.ai-switch input { display: none; }
.ai-track { width: 38px; height: 22px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--border); position: relative; transition: 0.15s; flex-shrink: 0; }
.ai-knob { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: var(--text-dim); transition: 0.15s; }
.ai-switch input:checked + .ai-track { background: rgba(91,140,255,0.3); border-color: var(--accent); }
.ai-switch input:checked + .ai-track .ai-knob { left: 18px; background: var(--accent); }
.ai-switch:has(input:checked) { color: var(--text); }

/* ---------- topbar points ---------- */
.points-chip {
  display: inline-flex; align-items: baseline; gap: 5px; cursor: pointer;
  padding: 6px 12px; border-radius: 999px; white-space: nowrap;
  background: linear-gradient(120deg, rgba(91,140,255,0.12), rgba(55,216,195,0.1));
  border: 1px solid rgba(91,140,255,0.3);
}
.points-chip b { color: var(--accent); font-variant-numeric: tabular-nums; }
.points-chip span { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }