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<!DOCTYPE html>
<html lang="en" data-theme="light">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>FactFlow</title>
<style>
:root, [data-theme="light"] {
--font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;
--text-xs: 0.72rem; --text-sm: 0.85rem; --text-base: 1rem;
--space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
--color-bg: #f7f6f2; --color-surface: #f9f8f5; --color-surface-2: #fbfbf9; --color-surface-offset: #f3f0ec; --color-border: #d4d1ca; --color-divider: #dcd9d5;
--color-text: #28251d; --color-text-muted: #66655f; --color-text-faint: #9a9892; --color-text-inverse: #f9f8f4;
--color-primary: #01696f; --color-primary-hover: #0c4e54; --color-primary-highlight: #cedcd8;
--color-success: #437a22; --color-success-highlight: #d4dfcc; --color-error: #a12c7b; --color-error-highlight: #e0ced7; --color-gold: #d19900; --color-gold-highlight: #e9e0c6;
--radius-sm: 4px; --radius-md: 6px; --radius-lg: 10px; --radius-xl: 14px; --radius-full: 9999px;
--shadow-sm: 0 1px 2px rgba(30,25,15,0.06); --shadow-md: 0 4px 12px rgba(30,25,15,0.08);
--cell-fluent: #437a22; --cell-learning: #d19900; --cell-struggling: #a12c7b; --cell-locked: #d4d1ca; --cell-empty: #e8e5df; --cell-near-ready: #7caa4a;
}
[data-theme="dark"] {
--color-bg: #171614; --color-surface: #1c1b19; --color-surface-2: #201f1d; --color-surface-offset: #22211f; --color-border: #393836; --color-divider: #262523;
--color-text: #e0ded8; --color-text-muted: #a6a29a; --color-text-faint: #6f6b64; --color-text-inverse: #1d1b17;
--color-primary: #4f98a3; --color-primary-hover: #227f8b; --color-primary-highlight: #313b3b;
--color-success: #6daa45; --color-success-highlight: #31422b; --color-error: #d163a7; --color-error-highlight: #4c3d46; --color-gold: #e8af34; --color-gold-highlight: #4d4332;
--shadow-sm: 0 1px 2px rgba(0,0,0,0.2); --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
--cell-fluent: #6daa45; --cell-learning: #e8af34; --cell-struggling: #d163a7; --cell-locked: #393836; --cell-empty: #2a2926; --cell-near-ready: #8fc45a;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: none; text-size-adjust: none; }
body { margin: 0; min-height: 100dvh; font-family: var(--font-body); font-size: var(--text-base); line-height: 1.5; color: var(--color-text); background: var(--color-bg); }
h1, h2, h3 { line-height: 1.15; margin: 0; }
p { margin: 0; color: var(--color-text-muted); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; }
button, .keypad, .key-btn, .btn, .btn-ghost, .icon-btn {
-webkit-tap-highlight-color: transparent;
user-select: none;
touch-action: manipulation;
}
input, select { width: 100%; min-height: 42px; border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent); background: var(--color-surface-2); border-radius: var(--radius-md); padding: 0.65rem 0.8rem; }
.app { max-width: 1220px; margin: 0 auto; padding: var(--space-4); display: grid; gap: var(--space-4); }
.header { background: linear-gradient(135deg, var(--color-primary), color-mix(in srgb, var(--color-primary) 75%, black)); color: var(--color-text-inverse); border-radius: var(--radius-xl); padding: var(--space-3) var(--space-5); display: flex; justify-content: space-between; align-items: center; box-shadow: var(--shadow-md); }
.brand { display: flex; gap: var(--space-3); align-items: center; }
.logo { width: 38px; height: 38px; border-radius: var(--radius-full); background: transparent; display: grid; place-items: center; flex: 0 0 auto; overflow: hidden; line-height: 0; align-self: center; }
.logo-mark { width: 100%; height: 100%; display: block; }
.header h1 { font-size: 1.15rem; }
.header-actions { display: flex; gap: var(--space-2); align-items: center; }
.header-google-auth { display: flex; align-items: center; justify-content: flex-end; min-width: 0; }
.header-google-auth .btn-google-signin { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 8px 16px; border-radius: var(--radius-md); background: #ffffff; color: #3c4043; border: 1px solid #dadce0; font-size: var(--text-sm); font-weight: 700; white-space: nowrap; box-shadow: 0 2px 6px rgba(15, 23, 42, 0.14); }
.header-google-auth .btn-google-signin:hover { background: #f8f9fa; }
.header-google-auth .header-user-info { display: none; align-items: center; gap: 10px; flex-wrap: wrap; padding: 6px 8px; background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.34); border-radius: var(--radius-lg); }
.header-google-auth .auth-status { color: rgba(255,255,255,0.9); font-size: 13px; max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.header-google-auth .auth-status strong { color: #ffffff; }
.header-google-auth .drive-sync-status { color: rgba(255,255,255,0.85); font-size: 12px; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.drive-sync-dot { width: 8px; height: 8px; border-radius: 50%; background: #94a3b8; display: inline-block; flex: 0 0 auto; }
.drive-sync-dot.synced { background: #10b981; }
.drive-sync-dot.syncing { background: #f59e0b; animation: pulse 1.2s infinite; }
.drive-sync-dot.error { background: #ef4444; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.35; } }
.header-google-auth .btn-google-signout { min-height: 36px; padding: 6px 14px; border-radius: var(--radius-md); color: #ffffff; border: 1px solid rgba(255,255,255,0.45); background: rgba(255,255,255,0.1); font-size: var(--text-xs); font-weight: 700; }
.header-google-auth .btn-google-signout:hover { background: rgba(255,255,255,0.22); }
.signout-short { display: none; }
.header-google-auth .signed-in-label { }
.header, .header-actions, .header-google-auth, .header-google-auth .header-user-info { min-width: 0; }
.header-google-auth .header-user-info { max-width: 100%; flex-wrap: nowrap; }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border-radius: var(--radius-md); background: rgba(255,255,255,0.12); color: var(--color-text-inverse); border: 1px solid rgba(255,255,255,0.16); font-size: 1rem; }
.icon-btn:hover, .icon-btn.active { background: rgba(255,255,255,0.22); }
.google-logo { width: 23px; height: 23px; display: block; }
.settings-icon .google-logo { width: 20px; height: 20px; }
.panel { background: var(--color-surface); border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent); border-radius: var(--radius-xl); padding: var(--space-4); box-shadow: var(--shadow-sm); }
.panel h2 { font-size: 1.1rem; margin-bottom: var(--space-1); }
.subtle { font-size: var(--text-sm); color: var(--color-text-muted); }
.row { display: flex; gap: var(--space-2); flex-wrap: wrap; align-items: center; }
.btn { padding: 0.75rem 1.2rem; background: var(--color-primary); color: var(--color-text-inverse); border-radius: var(--radius-md); font-weight: 600; }
.btn:hover { background: var(--color-primary-hover); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-ghost { padding: 0.75rem 1rem; background: transparent; color: var(--color-text); border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent); border-radius: var(--radius-md); font-size: var(--text-sm); }
.metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2); }
.stat { padding: var(--space-2) var(--space-3); background: var(--color-surface-2); border: 1px solid color-mix(in srgb, var(--color-text) 6%, transparent); border-radius: var(--radius-lg); }
.stat .label { font-size: var(--text-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat .value { margin-top: 0.1rem; font-size: 1.15rem; font-weight: 700; }
.stat.time-warn { background: var(--color-gold-highlight); transition: background 0.4s ease; }
.stat.time-danger { background: var(--color-error-highlight); transition: background 0.4s ease; }
.practice-subtitle-row { display: flex; align-items: center; gap: 0; flex-wrap: wrap; }
.daily-quizzes { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 700; white-space: nowrap; }
.quiz-stat-divider { margin: 0 0.35rem; color: var(--color-text-faint); }
.bar-block { margin-top: var(--space-3); }
.bar-label-row { display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-2); flex-wrap: wrap; margin-bottom: 0.35rem; font-size: var(--text-sm); color: var(--color-text-muted); }
.bar-label-main { color: var(--color-text); font-weight: 800; }
.bar-label-meta { font-size: var(--text-xs); font-weight: 700; color: var(--color-text-muted); }
.settings-item.active { background: var(--color-primary-highlight); color: var(--color-text); font-weight: 800; }
.practice-layout { display: grid; grid-template-columns: minmax(0, 1fr) 410px; gap: var(--space-4); align-items: stretch; }
.problem-area { padding: var(--space-5) 0 var(--space-3); text-align: center; position: relative; }
.problem-text { font-size: clamp(2.4rem, 6vw, 4.5rem); font-weight: 700; letter-spacing: -0.03em; }
.answer-wrap { max-width: 260px; margin: 0 auto; position: relative; }
.cooldown-stack {
width: min(92%, 680px);
margin: 0 auto;
display: grid;
gap: 0.35rem;
pointer-events: none;
z-index: 90;
}
.cooldown-banner {
margin-top: 0;
box-shadow: var(--shadow-md);
}
.answer-input { text-align: center; font-size: clamp(1.6rem, 4vw, 2.5rem); font-weight: 700; min-height: 64px; }
.answer-input:disabled { opacity: 0.45; }
.feedback-pill { position: absolute; right: 0.6rem; top: 50%; transform: translateY(-50%); border-radius: var(--radius-full); padding: 0.3rem 0.55rem; font-size: var(--text-xs); font-weight: 700; opacity: 0; transition: opacity 150ms; pointer-events: none; }
.feedback-pill.show { opacity: 1; transform: translateY(-50%) scale(1.02); }
.feedback-pill.good { background: var(--color-success-highlight); color: var(--color-success); }
.feedback-pill.bad { background: var(--color-error-highlight); color: var(--color-error); }
.keypad { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2); }
.key-btn { padding: 0.75rem 0.4rem; background: var(--color-surface-2); border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent); border-radius: var(--radius-md); font-weight: 700; font-size: 1.05rem; }
.key-btn:hover { background: var(--color-surface-offset); }
.key-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.key-btn.wide { grid-column: span 2; }
.score-note { margin-top: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); padding: 0.5rem 0.75rem; background: var(--color-surface-offset); border-radius: var(--radius-md); display: none; }
.score-note.visible { display: block; }
.status-text { margin-top: var(--space-2); padding: 0.7rem 0.85rem; border-radius: var(--radius-md); background: var(--color-surface-offset); color: var(--color-text-muted); font-size: var(--text-sm); }
.status-text.good { background: var(--color-success-highlight); color: var(--color-text); }
.status-text.warn { background: var(--color-gold-highlight); color: var(--color-text); }
.status-text.bad { background: var(--color-error-highlight); color: var(--color-text); }
.classroom-submit-box {
display: grid;
gap: 0.35rem;
justify-items: center;
margin-top: var(--space-2);
padding: 0.55rem 0.7rem;
border: 1px solid color-mix(in srgb, var(--color-primary) 18%, transparent);
background: color-mix(in srgb, var(--color-primary-highlight) 62%, var(--color-surface));
border-radius: var(--radius-md);
color: var(--color-text-muted);
font-size: var(--text-xs);
text-align: center;
}
.classroom-badge {
display: inline-flex;
align-items: center;
gap: 0.3rem;
font-weight: 800;
color: var(--color-text);
line-height: 1.25;
}
.classroom-submit-status { line-height: 1.3; }
.classroom-submit-status.ok { color: var(--color-success); font-weight: 700; }
.classroom-submit-status.error { color: var(--color-error); font-weight: 700; }
.classroom-retry-btn {
min-height: 0;
padding: 0.3rem 0.6rem;
font-size: var(--text-xs);
border-radius: var(--radius-full);
}
.pill { display: inline-flex; padding: 0.25rem 0.55rem; border-radius: var(--radius-full); background: var(--color-surface-offset); font-size: var(--text-xs); font-weight: 600; }
.timeout-overlay { display: none; text-align: center; padding: var(--space-4); background: var(--color-gold-highlight); border-radius: var(--radius-lg); border: 2px solid var(--color-gold); margin-top: var(--space-3); }
.timeout-overlay.active { display: block; }
.timeout-overlay .answer-reveal { font-size: 1.5rem; font-weight: 700; margin: var(--space-2) 0; }
.new-fact-label {
display: block;
position: absolute;
top: -0.22rem;
left: 50%;
right: auto;
width: max-content;
max-width: 90%;
opacity: 0;
pointer-events: none;
font-size: 0.86rem;
font-weight: 850;
color: var(--color-primary);
text-align: center;
letter-spacing: 0.045em;
text-transform: uppercase;
margin-bottom: 0;
min-height: 0;
padding: 0.2rem 0.62rem;
border-radius: var(--radius-full);
background: var(--color-primary-highlight);
border: 1px solid color-mix(in srgb, var(--color-primary) 22%, transparent);
box-shadow: var(--shadow-sm);
transform: translateX(-50%) translateY(-0.18rem);
transition: opacity 140ms ease, transform 140ms ease;
z-index: 3;
white-space: nowrap;
}
.new-fact-label.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.cooldown-banner { display: none; text-align: center; padding: var(--space-2) var(--space-3); background: var(--color-error-highlight); color: var(--color-error); border-radius: var(--radius-lg); font-weight: 700; font-size: var(--text-sm); margin-top: var(--space-2); }
.cooldown-banner.active { display: block; }
.cooldown-stack .cooldown-banner { margin-top: 0; }
.cooldown-stack .cooldown-banner.active { margin-bottom: var(--space-2); }
.completion-celebration {
display: none;
max-width: 380px;
margin: 0 auto var(--space-3);
text-align: center;
justify-items: center;
gap: 0.8rem;
}
.completion-celebration.active {
display: grid;
}
.completion-video {
display: block;
width: min(360px, 92vw);
max-height: min(58vh, 460px);
object-fit: contain;
border-radius: var(--radius-xl);
box-shadow: var(--shadow-md);
background: var(--color-surface-2);
border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
}
.play-panel.complete-mode .cooldown-stack,
.play-panel.complete-mode .problem-area,
.play-panel.complete-mode .answer-wrap,
.play-panel.complete-mode .timeout-overlay,
.play-panel.complete-mode .keypad {
display: none !important;
}
.graduate-banner {
display: none;
position: fixed;
top: 72px;
left: 50%;
width: min(92vw, 680px);
transform: translateX(-50%) translateY(-6px);
text-align: center;
padding: var(--space-3) var(--space-4);
background: var(--color-success-highlight);
color: var(--color-success);
border: 1px solid color-mix(in srgb, var(--color-success) 26%, transparent);
border-radius: var(--radius-lg);
font-weight: 700;
font-size: var(--text-base);
margin-bottom: 0;
box-shadow: var(--shadow-md);
pointer-events: none;
z-index: 1001;
}
.graduate-banner.active { display: block; animation: toastPopIn 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
@keyframes popIn { 0% { transform: scale(0.9); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
@keyframes toastPopIn { 0% { transform: translateX(-50%) translateY(-6px) scale(0.98); opacity: 0; } 100% { transform: translateX(-50%) translateY(0) scale(1); opacity: 1; } }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }
/* ── Progress Grid ── */
.pg-panel {
padding: var(--space-3);
overflow: hidden;
display: flex;
flex-direction: column;
}
.pg-panel h2 {
font-size: var(--text-sm);
text-transform: uppercase;
letter-spacing: 0.06em;
color: var(--color-text-muted);
margin-bottom: var(--space-3);
}
.pg-table {
display: grid;
grid-template-columns: 32px repeat(11, 22px);
grid-auto-rows: 22px;
gap: 3px;
justify-content: center;
align-items: center;
padding: 0.75rem 0.55rem;
border-radius: var(--radius-lg);
background: var(--color-surface-2);
border: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
overflow-x: auto;
}
.pg-corner {
width: 32px;
height: 22px;
}
.pg-top-label,
.pg-row-label {
display: grid;
place-items: center;
font-size: 0.62rem;
font-weight: 850;
line-height: 1;
color: var(--color-text-muted);
white-space: nowrap;
}
.pg-row-label {
justify-content: end;
padding-right: 4px;
}
.pg-row-label.current-row {
color: var(--color-primary);
font-weight: 900;
}
.pg-cell {
width: 22px;
height: 22px;
border-radius: 7px;
display: grid;
place-items: center;
position: relative;
font-size: 0.62rem;
font-weight: 850;
line-height: 1;
border: 1px solid rgba(40, 37, 29, 0.10);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.24), 0 1px 2px rgba(0,0,0,0.06);
transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
white-space: nowrap;
}
.pg-cell:hover {
transform: translateY(-1px);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.28), 0 3px 7px rgba(0,0,0,0.12);
}
.pg-cell.fluent,
.pg-cell.review {
background: var(--cell-fluent);
color: var(--color-text-inverse);
}
.pg-cell.review::after {
content: '';
position: absolute;
right: 3px;
top: 3px;
width: 5px;
height: 5px;
border-radius: var(--radius-full);
background: var(--cell-learning);
border: 1px solid rgba(255,255,255,0.7);
box-shadow: 0 1px 2px rgba(0,0,0,0.16);
}
.pg-cell.learning {
background: var(--cell-learning);
color: #28251d;
}
.pg-cell.struggling {
background: var(--cell-struggling);
color: var(--color-text-inverse);
}
.pg-cell.locked {
background: var(--cell-locked);
color: var(--color-text-muted);
opacity: 0.38;
box-shadow: none;
}
.pg-cell.empty {
background: var(--cell-empty);
color: var(--color-text-muted);
}
.pg-cell.near-ready {
background: var(--cell-near-ready);
color: var(--color-text-inverse);
opacity: 0.82;
}
.pg-cell.near-ready::before {
content: '';
position: absolute;
inset: 0;
border-radius: inherit;
border: 2px dashed rgba(255,255,255,0.55);
pointer-events: none;
}
.pg-cell.current-focus {
outline: 2px solid var(--color-primary);
outline-offset: 1px;
box-shadow: inset 0 1px 0 rgba(255,255,255,0.26), 0 0 0 3px rgba(1, 105, 111, 0.15), 0 2px 5px rgba(0,0,0,0.10);
}
.pg-legend {
display: grid;
grid-template-columns: repeat(3, auto);
justify-content: center;
align-items: center;
gap: 0.55rem 1rem;
margin-top: var(--space-3);
font-size: var(--text-xs);
color: var(--color-text-muted);
}
.pg-legend span {
display: flex;
align-items: center;
gap: 5px;
white-space: nowrap;
}
.pg-legend .swatch {
width: 12px;
height: 12px;
border-radius: 4px;
flex-shrink: 0;
box-shadow: inset 0 1px 0 rgba(255,255,255,0.22);
}
.pg-legend .swatch.fl { background: var(--cell-fluent); }
.pg-legend .swatch.nr { background: var(--cell-near-ready); position: relative; }
.pg-legend .swatch.nr::before { content: ''; position: absolute; inset: 0; border-radius: inherit; border: 1px dashed rgba(255,255,255,0.6); }
.pg-legend .swatch.rv { background: var(--cell-fluent); position: relative; }
.pg-legend .swatch.rv::after {
content: '';
position: absolute;
right: 1px;
top: 1px;
width: 4px;
height: 4px;
border-radius: var(--radius-full);
background: var(--cell-learning);
border: 1px solid rgba(255,255,255,0.7);
}
.pg-legend .swatch.ln { background: var(--cell-learning); }
.pg-legend .swatch.st { background: var(--cell-struggling); }
.pg-legend .swatch.emp { background: var(--cell-empty); }
/* ── Answer glow ── */
.answer-input {
transition: box-shadow 150ms ease, border-color 150ms ease, background-color 150ms ease;
}
.answer-input.glow-good {
border-color: var(--color-success);
box-shadow: 0 0 0 8px rgba(67, 122, 34, 0.32), 0 0 28px rgba(67, 122, 34, 0.42);
}
.answer-input.glow-bad {
border-color: var(--color-error);
box-shadow: 0 0 0 8px rgba(161, 44, 123, 0.30), 0 0 28px rgba(161, 44, 123, 0.38);
}
/* -- Streak meter -- */
.streak-meter {
display: grid;
grid-template-columns: minmax(0, 1fr) auto;
gap: 0.55rem;
align-items: center;
margin-top: var(--space-3);
padding: 0.55rem 0.7rem;
background: var(--color-surface-2);
border: 1px solid color-mix(in srgb, var(--color-text) 7%, transparent);
border-radius: var(--radius-lg);
}
.streak-track {
height: 13px;
border-radius: var(--radius-full);
background: color-mix(in srgb, var(--color-text) 8%, transparent);
overflow: hidden;
box-shadow: inset 0 1px 2px rgba(0,0,0,0.16);
}
.streak-fill {
width: 0%;
height: 100%;
border-radius: inherit;
background: #2d8cff;
transition: width 180ms ease;
}
.streak-flame {
font-size: 1.15rem;
line-height: 1;
filter: grayscale(0.65);
opacity: 0.65;
transform-origin: 50% 70%;
}
.streak-flame.hot {
filter: none;
opacity: 1;
animation: flamePulse 700ms ease-in-out infinite alternate;
}
@keyframes flamePulse {
0% { transform: scale(1) rotate(-4deg); }
100% { transform: scale(1.24) rotate(5deg); }
}
/* -- FPM meter -- */
.fpm-fill {
width: 0%;
height: 100%;
border-radius: inherit;
background: #2d8cff;
transition: width 300ms ease;
}
.fpm-runner {
font-size: 1.15rem;
line-height: 1;
filter: grayscale(0.65);
opacity: 0.65;
transform-origin: 50% 70%;
}
.fpm-runner.fast {
filter: none;
opacity: 1;
animation: runPulse 500ms ease-in-out infinite alternate;
}
@keyframes runPulse {
0% { transform: translateY(0) scaleX(1); }
100% { transform: translateY(-2px) scaleX(1.12); }
}
/* -- Progress graph -- */
.progress-graph-wrap {
margin-top: var(--space-4);
padding-top: var(--space-3);
border-top: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
flex: 1;
display: flex;
flex-direction: column;
}
.progress-graph-wrap h3 {
font-size: var(--text-sm);
text-transform: uppercase;
letter-spacing: 0.06em;
color: var(--color-text-muted);
margin-bottom: var(--space-3);
}
.progress-graph {
border-radius: var(--radius-lg);
background: var(--color-surface-2);
border: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
overflow: hidden;
flex: 1;
display: flex;
flex-direction: column;
}
.progress-graph svg {
display: block;
width: 100%;
flex: 1;
min-height: 300px;
}
/* -- Mastery score card -- */
.mastery-scorecard {
padding: 0.75rem 0.75rem 0.5rem;
border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
text-align: center;
}
.mastery-big-num {
display: block;
font-size: 2.65rem;
font-weight: 800;
line-height: 1;
color: var(--color-primary);
letter-spacing: -0.04em;
margin: 0.15rem 0;
}
.mastery-score-label {
display: block;
font-size: var(--text-xs);
text-transform: uppercase;
letter-spacing: 0.06em;
color: var(--color-text-muted);
font-weight: 700;
line-height: 1.4;
}
.mastery-score-head {
display: inline-flex;
align-items: center;
justify-content: center;
gap: 0.35rem;
}
.mastery-info-btn {
width: 22px;
height: 22px;
border-radius: var(--radius-full);
display: inline-grid;
place-items: center;
background: var(--color-surface-offset);
color: var(--color-text-muted);
border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
font-size: 0.72rem;
font-weight: 900;
line-height: 1;
padding: 0;
}
.mastery-info-btn:hover {
color: var(--color-primary);
border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
background: var(--color-primary-highlight);
}
.mastery-stats {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 0.15rem 0.45rem;
font-size: var(--text-xs);
color: var(--color-text-muted);
letter-spacing: 0.01em;
}
.mastery-stat-piece {
white-space: nowrap;
}
.mastery-chart-note {
padding: 0 var(--space-3) var(--space-2);
margin-top: 0.35rem;
font-size: 0.66rem;
line-height: 1.35;
color: var(--color-text-faint);
text-align: center;
}
.mastery-empty-note {
font-size: var(--text-xs);
color: var(--color-text-faint);
padding: var(--space-2) 0;
text-transform: uppercase;
letter-spacing: 0.06em;
font-weight: 700;
}
.graph-axis, .graph-grid-line {
stroke: color-mix(in srgb, var(--color-text) 18%, transparent);
stroke-width: 1;
}
.graph-grid-line {
stroke: color-mix(in srgb, var(--color-text) 8%, transparent);
}
.graph-line {
fill: none;
stroke: var(--color-primary);
stroke-width: 3;
stroke-linecap: round;
stroke-linejoin: round;
}
.graph-dot {
fill: var(--color-primary);
stroke: var(--color-surface-2);
stroke-width: 2;
}
.graph-label {
fill: var(--color-text-muted);
font-size: 9px;
font-weight: 700;
}
.graph-empty {
fill: var(--color-text-muted);
font-size: 11px;
font-weight: 700;
}
.graph-milestone-line {
stroke: var(--color-gold);
stroke-width: 1.8;
stroke-dasharray: 3,2;
opacity: 0.82;
}
.graph-milestone-label-bg {
fill: var(--color-gold);
stroke: var(--color-surface-2);
stroke-width: 1.2;
}
.graph-milestone-label-text {
fill: var(--color-text-inverse);
font-size: 10px;
font-weight: 900;
letter-spacing: -0.02em;
}
@media (max-width: 820px) {
.practice-layout { grid-template-columns: 1fr; }
.pg-panel { order: 10; }
.pg-table { grid-template-columns: 30px repeat(11, 21px); grid-auto-rows: 21px; gap: 3px; }
.pg-cell { width: 21px; height: 21px; border-radius: 6px; font-size: 0.58rem; }
}
@media (max-width: 500px) {
.app { padding: 0.5rem; gap: var(--space-2); }
.header { border-radius: var(--radius-lg); padding: 0.45rem 0.6rem; align-items: center; gap: var(--space-2); }
.brand { gap: 0.45rem; align-items: center; }
.logo { width: 32px; height: 32px; border-radius: var(--radius-full); }
.header h1 { font-size: 1rem; }
.header-actions { flex-wrap: nowrap; justify-content: flex-end; gap: 0.4rem; }
.header-google-auth { flex: 1 1 auto; justify-content: flex-end; min-width: 0; }
.header-google-auth .btn-google-signin { padding: 8px 10px; font-size: 0.78rem; }
.header-google-auth .header-user-info { gap: 7px; padding: 5px 7px; flex-wrap: nowrap; min-width: 0; }
.header-google-auth .auth-status { max-width: 92px; font-size: 12px; }
.header-google-auth .signed-in-label { display: none; }
.header-google-auth .drive-sync-status { font-size: 11px; }
.header-google-auth .btn-google-signout { min-width: 42px; min-height: 34px; padding: 5px 8px; flex: 0 0 auto; font-size: 0.68rem; }
.signout-full { display: none; }
.signout-short { display: inline; }
.icon-btn { width: 36px; height: 36px; }
.settings-dropdown { right: 0; min-width: min(92vw, 300px); }
.panel { padding: 0.65rem; border-radius: var(--radius-lg); }
.metrics { grid-template-columns: repeat(3, 1fr); gap: 0.45rem; }
.stat { padding: 0.45rem 0.5rem; }
.stat .label { font-size: 0.6rem; }
.stat .value { font-size: 1rem; }
.practice-subtitle-row { gap: 0; }
.daily-quizzes, .bar-label-row { font-size: 0.76rem; }
.bar-label-meta { font-size: 0.68rem; }
.bar-block { margin-top: 0.65rem; }
.streak-meter { margin-top: 0.35rem; padding: 0.42rem 0.55rem; }
.problem-area { padding: 0.65rem 0 0.5rem; }
.problem-text { font-size: clamp(2.4rem, 12vw, 3.4rem); }
.answer-wrap { max-width: 230px; }
.completion-celebration { max-width: 300px; margin-bottom: 0.75rem; }
.completion-video { width: min(300px, 92vw); max-height: min(54vh, 420px); }
.answer-input { min-height: 56px; font-size: 2rem; }
.keypad { gap: 0.45rem; margin-top: 0.65rem !important; }
.key-btn { min-height: 54px; padding: 0.65rem 0.3rem; font-size: 1.2rem; }
.row[style*="margin-top:var(--space-3)"] { margin-top: 0.65rem !important; }
.status-text { padding: 0.55rem 0.65rem; font-size: 0.78rem; }
.pg-panel { padding: var(--space-2); }
.pg-table { grid-template-columns: 27px repeat(11, 20px); grid-auto-rows: 20px; gap: 2px; padding: 0.45rem; }
.pg-cell { width: 20px; height: 20px; border-radius: 5px; font-size: 0.54rem; }
.pg-top-label, .pg-row-label { font-size: 0.58rem; }
.pg-legend {
grid-template-columns: repeat(2, minmax(0, 1fr));
justify-content: stretch;
gap: 0.45rem 0.65rem;
}
.progress-graph svg { min-height: 300px; }
body.mobile-play-mode.round-active .pg-panel { display: none; }
body.mobile-play-mode.round-active .progress-graph-wrap { display: none; }
}
/* ──── Floating mobile corner timer ──── */
#mobileCornerTimer {
display: none;
position: fixed;
top: var(--space-3);
right: var(--space-3);
z-index: 900;
min-width: 54px;
text-align: center;
padding: 0.3rem 0.6rem;
border-radius: var(--radius-full);
background: var(--color-surface-2);
border: 2px solid var(--color-border);
color: var(--color-text-muted);
font-size: 1.05rem;
font-weight: 800;
line-height: 1.3;
box-shadow: var(--shadow-md);
pointer-events: none;
transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease;
letter-spacing: -0.02em;
}
#mobileCornerTimer.warn {
background: var(--color-gold-highlight);
border-color: var(--color-gold);
color: var(--color-text);
}
#mobileCornerTimer.danger {
background: var(--color-error-highlight);
border-color: var(--color-error);
color: var(--color-error);
animation: timerPulse 0.6s ease-in-out infinite alternate;
}
@keyframes timerPulse {
0% { transform: scale(1); }
100% { transform: scale(1.1); }
}
body.mobile-play-mode.round-active #mobileCornerTimer { display: block; }
/* ──── Settings dropdown ──── */
.settings-menu-wrap { position: relative; }
.settings-dropdown {
display: none; position: absolute; top: calc(100% + 8px); right: 0;
background: var(--color-surface);
border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
padding: 0.6rem; min-width: 290px; z-index: 300;
}
.settings-dropdown.open { display: block; }
.settings-section-label {
font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.07em;
color: var(--color-text-faint); font-weight: 800;
padding: 0.55rem 0.55rem 0.3rem;
}
.settings-item {
display: block; width: 100%; text-align: left;
padding: var(--space-2) var(--space-3); border-radius: var(--radius-md);
font-size: var(--text-sm); color: var(--color-text); background: none; border: none;
cursor: pointer;
}
.settings-item:hover { background: var(--color-surface-offset); }
.settings-item.active { background: var(--color-primary-highlight); color: var(--color-text); font-weight: 700; }
.settings-item-row {
display: grid;
grid-template-columns: 32px minmax(0, 1fr) 18px;
align-items: center;
gap: 0.65rem;
min-height: 54px;
padding: 0.56rem 0.65rem;
border-radius: var(--radius-lg);
font-size: var(--text-base);
}
.settings-icon {
width: 32px;
height: 32px;
display: grid;
place-items: center;
border-radius: var(--radius-md);
background: var(--color-surface-offset);
color: var(--color-text-muted);
border: 1px solid color-mix(in srgb, var(--color-text) 7%, transparent);
}
.settings-icon svg,
.settings-check svg {
display: block;
}
.settings-title {
display: block;
font-size: 0.94rem;
font-weight: 700;
line-height: 1.2;
}
.settings-subtitle {
display: block;
margin-top: 0.12rem;
font-size: 0.74rem;
color: var(--color-text-muted);
line-height: 1.25;
}
.settings-item.active .settings-icon {
background: color-mix(in srgb, var(--color-primary) 15%, var(--color-surface));
color: var(--color-primary);
border-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
}
.settings-check {
visibility: hidden;
color: var(--color-primary);
display: grid;
place-items: center;
}
.settings-item.active .settings-check { visibility: visible; }
.settings-divider {
height: 1px;
background: color-mix(in srgb, var(--color-text) 9%, transparent);
margin: 0.45rem 0;
}
.settings-item.danger { color: var(--color-error); }
.settings-item.danger .settings-title { color: var(--color-error); }
.settings-item.danger:hover { background: var(--color-error-highlight); }
.settings-confirm-box {
margin-top: 0.25rem;
padding: var(--space-2);
border-radius: var(--radius-lg);
background: var(--color-error-highlight);
border: 1px solid color-mix(in srgb, var(--color-error) 25%, transparent);
}
.settings-confirm-box p {
font-size: var(--text-xs); color: var(--color-text);
margin-bottom: var(--space-2); max-width: none; line-height: 1.5;
}
.settings-confirm-box .settings-item { margin-bottom: var(--space-1); }
/* ──── Mobile haptics information button ──── */
.haptics-row {
grid-template-columns: 32px minmax(0, 1fr) 24px 18px;
}
.haptics-info-btn {
width: 22px;
height: 22px;
border-radius: var(--radius-full);
display: inline-grid;
place-items: center;
background: var(--color-surface-offset);
color: var(--color-text-muted);
border: 1px solid color-mix(in srgb, var(--color-text) 12%, transparent);
font-size: 0.72rem;
font-weight: 900;
line-height: 1;
padding: 0;
}
.haptics-info-btn:hover,
.haptics-info-btn:focus-visible {
color: var(--color-primary);
border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
background: var(--color-primary-highlight);
outline: none;
}
/* ──── Speed target slider ──── */
.speed-target-row {
cursor: default;
--speed-target-thumb-size: 24px;
--speed-target-track-height: 7px;
--speed-target-fill: 0%;
}
.speed-target-row input[type="range"] {
width: 100%;
height: var(--speed-target-thumb-size);
min-height: var(--speed-target-thumb-size);
margin: 0.35rem 0 0;
padding: 0;
display: block;
background: transparent;
-webkit-appearance: none;
appearance: none;
}
.speed-target-row input[type="range"]::-webkit-slider-runnable-track {
width: 100%;
height: var(--speed-target-track-height);
border-radius: var(--radius-full);
border: 1px solid color-mix(in srgb, var(--color-text) 24%, transparent);
background: linear-gradient(to right,
var(--color-primary) 0%,
var(--color-primary) var(--speed-target-fill),
color-mix(in srgb, var(--color-text) 12%, transparent) var(--speed-target-fill),
color-mix(in srgb, var(--color-text) 12%, transparent) 100%
);
}
.speed-target-row input[type="range"]::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: var(--speed-target-thumb-size);
height: var(--speed-target-thumb-size);
margin-top: calc((var(--speed-target-track-height) - var(--speed-target-thumb-size)) / 2);
border-radius: 50%;
background: var(--color-text-muted);
border: 3px solid var(--color-surface-2);
box-shadow: 0 1px 4px rgba(0,0,0,0.32);
}
.speed-target-row input[type="range"]::-moz-range-track {
width: 100%;
height: var(--speed-target-track-height);
border-radius: var(--radius-full);
border: 1px solid color-mix(in srgb, var(--color-text) 24%, transparent);
background: color-mix(in srgb, var(--color-text) 12%, transparent);
}
.speed-target-row input[type="range"]::-moz-range-progress {
height: var(--speed-target-track-height);
border-radius: var(--radius-full);
background: var(--color-primary);
}
.speed-target-row input[type="range"]::-moz-range-thumb {
width: calc(var(--speed-target-thumb-size) - 6px);
height: calc(var(--speed-target-thumb-size) - 6px);
border-radius: 50%;
background: var(--color-text-muted);
border: 3px solid var(--color-surface-2);
box-shadow: 0 1px 4px rgba(0,0,0,0.32);
}
.speed-target-row input[type="range"]:focus-visible {
outline: none;
}
.speed-target-row input[type="range"]:focus-visible::-webkit-slider-thumb {
box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 24%, transparent), 0 1px 4px rgba(0,0,0,0.32);
}
.speed-target-row input[type="range"]:focus-visible::-moz-range-thumb {
box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 24%, transparent), 0 1px 4px rgba(0,0,0,0.32);
}
.speed-target-row .speed-target-marks {
display: block;
position: relative;
width: 100%;
height: 0.9rem;
margin: 0.18rem 0 0;
overflow: visible;
font-size: 0.66rem;
color: var(--color-text-muted);
font-weight: 700;
/* CRITICAL PATCH: Align labels with thumb travel path */
/* Uses half the thumb size to create the necessary offset */
padding: 0 calc(var(--speed-target-thumb-size) / 2);
box-sizing: border-box;
}
.speed-target-row .speed-target-marks span {
position: absolute;
top: 0;
line-height: 1.2;
text-align: center;
transform: translateX(-50%);
white-space: nowrap;
}
.speed-target-row .speed-target-marks span:nth-child(1) { left: calc(var(--speed-target-thumb-size) / 2); }
.speed-target-row .speed-target-marks span:nth-child(2) { left: calc(25% + var(--speed-target-thumb-size) / 4); }
.speed-target-row .speed-target-marks span:nth-child(3) { left: 50%; }
.speed-target-row .speed-target-marks span:nth-child(4) { left: calc(75% - var(--speed-target-thumb-size) / 4); }
.speed-target-row .speed-target-marks span:nth-child(5) { left: calc(100% - var(--speed-target-thumb-size) / 2); }
.speed-target-note {
display: block;
margin-top: 0.3rem;
font-size: 0.68rem;
color: var(--color-text-faint);
line-height: 1.25;
}
.graph-dot.speed-mastered,
.graph-dot.speed-learning,
.graph-dot.speed-struggling {
fill: var(--color-primary);
}
/* ──── Level-up toast ──── */
.levelup-toast {
display: none; position: fixed; top: 72px; left: 50%;
transform: translateX(-50%) translateY(-6px); opacity: 0;
background: var(--color-primary); color: var(--color-text-inverse);
padding: var(--space-2) var(--space-6); border-radius: var(--radius-full);
font-weight: 700; font-size: var(--text-base); box-shadow: var(--shadow-md);
z-index: 1000; transition: opacity 260ms ease, transform 260ms ease;
white-space: nowrap; pointer-events: none;
}
.levelup-toast.show {
display: block; opacity: 1; transform: translateX(-50%) translateY(0);
}