:root {
  color-scheme: light dark;
  --accent: #8a4af3;
  --accent-deep: #5b39c7;
  --accent-bright: #a34fff;
  --canvas: #f6f4fb;
  --surface: #ffffff;
  --surface-soft: #f5efff;
  --lilac: #eee3ff;
  --mint: #59d19f;
  --lime: #d9ff59;
  --ink: #17151c;
  --muted: #716d7a;
  --line: rgba(41, 31, 58, .09);
  --shadow: 0 18px 48px rgba(64, 45, 96, .10);
  --radius: 22px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-synthesis: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #120f1a;
    --surface: #211b2b;
    --surface-soft: #332849;
    --lilac: #2e2145;
    --ink: #fbf9ff;
    --muted: #b9b1c4;
    --line: rgba(255,255,255,.08);
    --shadow: 0 18px 48px rgba(0,0,0,.26);
  }
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--canvas); }
body { margin: 0; min-width: 320px; min-height: 100vh; color: var(--ink); background: var(--canvas); -webkit-font-smoothing: antialiased; }
body.is-booting { overflow: hidden; }
body.is-booting #app { visibility: hidden; }
.boot-splash { position: fixed; z-index: 1000; inset: 0; display: grid; place-items: center; padding: max(24px, env(safe-area-inset-top, 0px)) max(24px, env(safe-area-inset-right, 0px)) max(24px, env(safe-area-inset-bottom, 0px)) max(24px, env(safe-area-inset-left, 0px)); background: radial-gradient(circle at 50% 43%, rgba(138,74,243,.12), transparent 31%), var(--canvas); opacity: 1; transition: opacity .3s ease, visibility .3s ease; }
.boot-splash.is-hiding { opacity: 0; visibility: hidden; }
.boot-splash__logo { width: min(34vw, 150px); height: min(25vw, 104px); display: grid; place-items: center; overflow: hidden; }
.boot-splash__logo svg { width: 100% !important; height: 100% !important; display: block; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
.lucide { display: inline-block; flex: 0 0 auto; vertical-align: -.18em; }
.icon--14 { width: 14px; height: 14px; }
.icon--15 { width: 15px; height: 15px; }
.icon--17 { width: 17px; height: 17px; }
.icon--18 { width: 18px; height: 18px; }
.icon--19 { width: 19px; height: 19px; }
.icon--20 { width: 20px; height: 20px; }
.icon--21 { width: 21px; height: 21px; }
.icon--23 { width: 23px; height: 23px; }
.icon--25 { width: 25px; height: 25px; }
.icon--50 { width: 50px; height: 50px; }
.text-center { text-align: center; }
.skip-link { position: fixed; z-index: 999; left: 16px; top: -80px; padding: 12px 16px; background: var(--ink); color: var(--surface); border-radius: 12px; }
.skip-link:focus { top: 16px; }

.app-frame { min-height: 100dvh; padding-bottom: calc(90px + var(--safe-bottom)); background: radial-gradient(circle at 50% -5%, rgba(138,74,243,.11), transparent 32%), var(--canvas); }
.topbar { position: sticky; top: 0; z-index: 20; height: calc(58px + env(safe-area-inset-top, 0px)); padding: env(safe-area-inset-top, 0px) max(16px, env(safe-area-inset-right, 0px)) 0 max(16px, env(safe-area-inset-left, 0px)); display: flex; align-items: center; justify-content: center; background: color-mix(in srgb, var(--canvas) 88%, transparent); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); }
.topbar__inner { width: min(100%, 560px); height: 58px; display: grid; grid-template-columns: 48px 1fr 48px; align-items: center; }
.topbar__title { margin: 0; text-align: center; font-size: 1.03rem; line-height: 1.2; font-weight: 750; letter-spacing: -.015em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.icon-button { width: 44px; height: 44px; border: 0; border-radius: 50%; background: transparent; display: grid; place-items: center; cursor: pointer; color: var(--accent-deep); }
.icon-button:hover { background: var(--surface-soft); }
.brand-mark { width: 48px; height: 38px; display: block; overflow: hidden; }
.brand-mark svg { width: 100% !important; height: 100% !important; display: block; }

.screen { width: min(100%, 560px); margin: 0 auto; padding: 8px 16px 28px; }
.screen--study { width: min(100%, 600px); }
.stack { display: grid; gap: 18px; }
.stack--tight { gap: 12px; }
.section-title { margin: 0 0 10px; font-size: 1.02rem; }
.muted { color: var(--muted); }
.caption { font-size: .78rem; line-height: 1.35; }
.eyebrow { margin: 0; color: var(--accent-deep); font-size: .72rem; line-height: 1.2; font-weight: 800; letter-spacing: .03em; text-transform: uppercase; }
.eyebrow--icon, .study-card__label--icon, .study-card__hint--icon, .meta-icon { display: inline-flex; align-items: center; gap: 5px; }
.title { margin: 0; font-size: clamp(1.35rem, 6vw, 1.72rem); line-height: 1.05; letter-spacing: -.035em; }
.subtitle { margin: 0; color: var(--muted); line-height: 1.42; }

.card { position: relative; border-radius: var(--radius); padding: 20px; background: var(--surface); border: 1px solid var(--line); overflow: hidden; }
.card--spotlight { background: linear-gradient(145deg, var(--surface-soft), color-mix(in srgb, var(--lilac) 62%, var(--surface))); border-color: rgba(138,74,243,.14); }
.card--success { background: color-mix(in srgb, var(--mint) 12%, var(--surface)); border-color: color-mix(in srgb, var(--mint) 30%, transparent); }
.card--danger { border-color: rgba(207,53,77,.26); }
.guide { min-height: 168px; display: grid; grid-template-columns: minmax(0,1fr) 98px; align-items: center; gap: 10px; }
.guide__copy { display: grid; gap: 7px; min-width: 0; }
.guide__character { width: 98px; height: 120px; padding: 7px; border-radius: 24px; overflow: hidden; align-self: end; background: #fff; box-shadow: 0 10px 24px rgba(80,45,130,.10); }
.guide__character img { width: 100%; height: 100%; object-fit: contain; }
.hero-action { margin-top: 16px; }

.button { min-height: 50px; border: 0; border-radius: 15px; padding: 12px 17px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; font-weight: 750; text-decoration: none; cursor: pointer; transition: transform .16s ease, opacity .16s ease, background .16s ease; }
.button:active { transform: scale(.985); }
.button:disabled { opacity: .48; cursor: not-allowed; }
.button--primary { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-deep)); box-shadow: 0 7px 0 #39246f; }
.button--primary:active { transform: translateY(3px); box-shadow: 0 4px 0 #39246f; }
.button--secondary { color: var(--accent-deep); background: var(--lilac); }
.button--plain { color: var(--accent-deep); background: transparent; }
.button--danger { color: #b02740; background: color-mix(in srgb, #ef4665 11%, var(--surface)); }
.button--full { width: 100%; }
.button-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.step { text-align: center; display: grid; justify-items: center; gap: 7px; font-size: .74rem; font-weight: 700; }
.step__icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 13px; color: var(--accent); background: var(--surface-soft); font-size: 1.25rem; }
.scan-actions { display: grid; gap: 12px; }
.privacy-note { display: flex; align-items: flex-start; gap: 8px; color: var(--muted); font-size: .78rem; line-height: 1.35; }
.privacy-note strong { color: var(--ink); }

.bottom-nav { position: fixed; z-index: 30; left: 50%; bottom: calc(10px + var(--safe-bottom)); transform: translateX(-50%); width: min(calc(100% - 20px), 560px); height: 70px; padding: 6px; display: grid; grid-template-columns: repeat(4, 1fr); background: color-mix(in srgb, var(--surface) 88%, transparent); border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 24px; backdrop-filter: blur(22px); }
.tab { border: 0; border-radius: 18px; background: transparent; color: var(--muted); display: grid; justify-items: center; align-content: center; gap: 3px; font-size: .66rem; font-weight: 720; cursor: pointer; }
.tab__icon { height: 22px; display: grid; place-items: center; line-height: 1; }
.tab.is-active { color: var(--accent); background: var(--surface-soft); }

.goal { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 14px; padding: 4px 8px; }
.stars { display: flex; gap: 7px; color: color-mix(in srgb, var(--accent-deep) 34%, transparent); }
.stars span { display: grid; place-items: center; }
.stars .earned { color: var(--accent-deep); filter: drop-shadow(0 2px 3px rgba(91,57,199,.18)); }
.stars .earned svg { fill: var(--lime); }
.list-card { display: grid; grid-template-columns: 52px 1fr auto; align-items: center; gap: 14px; padding: 17px 18px; color: inherit; text-decoration: none; }
.list-card__icon { width: 48px; height: 48px; border-radius: 50%; background: var(--surface-soft); display: grid; place-items: center; color: var(--accent-deep); font-weight: 850; overflow: hidden; }
.list-card__icon img { width: 100%; height: 100%; object-fit: contain; }
.list-card h3 { margin: 0 0 4px; font-size: 1rem; }
.list-card p { margin: 0; color: var(--muted); font-size: .83rem; }
.chevron { color: var(--muted); font-size: 1.25rem; }
.progress-meta { margin-top: 10px; display: flex; align-items: center; gap: 8px; color: var(--accent); font-size: .76rem; font-weight: 700; }

.page-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.page-row { display: grid; grid-template-columns: 62px 1fr auto; gap: 13px; align-items: center; padding: 10px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); }
.page-thumb { width: 62px; height: 78px; border-radius: 10px; object-fit: cover; border: 1px solid var(--line); }
.page-row h3 { margin: 0 0 4px; font-size: .94rem; }
.page-tools { display: grid; grid-template-columns: repeat(2, 34px); gap: 4px; }
.mini-button { width: 34px; height: 34px; border-radius: 10px; border: 0; background: var(--surface-soft); color: var(--accent-deep); cursor: pointer; }
.mini-button--delete { grid-column: 1 / -1; width: 72px; color: #b02740; }

.generation { min-height: calc(100dvh - 150px); display: grid; place-items: center; text-align: center; }
.generation__content { width: 100%; display: grid; justify-items: center; gap: 18px; }
.generation__character { width: 150px; height: 150px; object-fit: contain; animation: breathe 2s ease-in-out infinite; }
.progress-track { width: min(100%, 360px); height: 7px; border: 0; border-radius: 99px; overflow: hidden; appearance: none; background: rgba(91,57,199,.16); }
.progress-track::-webkit-progress-bar { border-radius: 99px; background: rgba(91,57,199,.16); }
.progress-track::-webkit-progress-value { border-radius: 99px; background: var(--lime); border: 1px solid rgba(91,57,199,.45); transition: width .35s ease; }
.progress-track::-moz-progress-bar { border-radius: 99px; background: var(--lime); border: 1px solid rgba(91,57,199,.45); transition: width .35s ease; }
@keyframes breathe { 50% { transform: translateY(-7px) scale(1.025); } }

.set-hero { display: grid; grid-template-columns: 1fr 96px; align-items: center; gap: 12px; }
.set-hero img { width: 96px; height: 112px; object-fit: contain; }
.practice-list { padding: 8px 18px; }
.practice-link { width: 100%; border: 0; border-bottom: 1px solid var(--line); padding: 11px 0; background: transparent; display: grid; grid-template-columns: 44px 1fr auto; gap: 12px; align-items: center; text-align: left; cursor: pointer; }
.practice-link:last-of-type { border-bottom: 0; }
.practice-link:disabled { opacity: .48; }
.practice-link__icon { width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center; background: var(--surface-soft); color: var(--accent); font-size: 1.2rem; }
.practice-link strong, .practice-link small { display: block; }
.practice-link small { margin-top: 3px; color: var(--muted); line-height: 1.3; }

.study-progress { display: grid; grid-template-columns: 1fr 86px; gap: 10px; align-items: center; padding: 14px; border-radius: 18px; background: linear-gradient(145deg, var(--surface-soft), var(--lilac)); border: 1px solid rgba(138,74,243,.11); }
.study-progress img { width: 86px; height: 86px; object-fit: contain; }
.study-progress__meta { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 10px; color: var(--muted); font-size: .84rem; font-weight: 700; }
.study-card { min-height: 280px; padding: 26px 22px; display: grid; align-content: center; text-align: center; cursor: pointer; perspective: 900px; }
.study-card__label { color: var(--accent); font-size: .73rem; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
.study-card__text { margin: 18px 0 8px; font-size: clamp(1.45rem, 7vw, 2.15rem); line-height: 1.16; letter-spacing: -.035em; }
.study-card__hint { color: var(--muted); font-size: .87rem; }
.choices { display: grid; gap: 11px; }
.choice { min-height: 54px; border-radius: 15px; border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--line)); background: var(--surface); text-align: left; padding: 13px 16px; font-weight: 650; cursor: pointer; }
.choice.is-correct { border-color: #35a475; background: color-mix(in srgb, var(--mint) 16%, var(--surface)); }
.choice.is-wrong { border-color: #cf354d; background: color-mix(in srgb, #ef4665 12%, var(--surface)); }
.feedback { display: grid; grid-template-columns: 78px 1fr; gap: 12px; align-items: center; }
.feedback img { width: 78px; height: 90px; object-fit: contain; }
.feedback h3, .feedback p { margin: 0; }
.feedback p { margin-top: 4px; color: var(--muted); }

.completion { min-height: calc(100dvh - 150px); display: grid; align-content: center; gap: 22px; text-align: center; }
.completion__character { width: 150px; height: 150px; object-fit: contain; margin: 0 auto; padding: 12px; border-radius: 44px; background: linear-gradient(145deg, var(--surface-soft), var(--lilac)); }
.completion > img { width: 150px; height: 150px; object-fit: contain; margin: 0 auto; padding: 12px; border-radius: 44px; background: linear-gradient(145deg, var(--surface-soft), var(--lilac)); }
.score { font-size: 2.2rem; font-weight: 850; color: var(--accent-deep); }

.rows { counter-reset: row; }
.row-item { display: grid; grid-template-columns: 28px 1fr; gap: 10px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.row-item:last-child { border: 0; }
.row-item::before { counter-increment: row; content: counter(row) "."; color: var(--accent); font-weight: 800; }
.row-item strong, .row-item span { display: block; }
.row-item span { margin-top: 5px; color: var(--muted); }
.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.match-tile { min-height: 82px; border: 1px solid var(--line); border-radius: 15px; padding: 10px; background: var(--surface); cursor: pointer; font-size: .85rem; }
.match-tile.is-selected { border-color: var(--accent); background: var(--surface-soft); }
.match-tile.is-matched { opacity: .28; pointer-events: none; }

.settings-list { padding: 0; overflow: hidden; }
.setting { min-height: 56px; padding: 12px 18px; display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 10px; border-bottom: 1px solid var(--line); }
.setting:last-child { border: 0; }
.setting button { border: 0; background: transparent; color: var(--accent-deep); font-weight: 700; cursor: pointer; }
.setting select { min-height: 40px; max-width: 172px; appearance: none; -webkit-appearance: none; padding: 8px 38px 8px 13px; border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--line)); border-radius: 12px; color: var(--accent-deep); background-color: var(--surface-soft); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%235b39c7' stroke-width='2.25' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 11px center; font-weight: 750; cursor: pointer; }
.setting select:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 28%, transparent); outline-offset: 2px; }
.credit-badge { display: inline-flex; align-items: center; gap: 6px; padding: 7px 10px; border-radius: 99px; background: var(--surface-soft); color: var(--accent-deep); font-size: .78rem; font-weight: 800; }
.benefits { display: grid; gap: 14px; }
.benefit { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.paywall-icon { width: 112px; height: 112px; margin: 10px auto 0; border-radius: 30px; display: grid; place-items: center; background: var(--surface-soft); color: var(--accent); font-size: 3.1rem; }

.modal-backdrop { position: fixed; z-index: 100; inset: 0; padding: 18px; display: grid; place-items: end center; background: rgba(16,11,24,.48); backdrop-filter: blur(4px); }
.modal { width: min(100%, 520px); max-height: min(88dvh, 760px); overflow: auto; padding: 22px; border-radius: 26px; background: var(--surface); box-shadow: 0 24px 70px rgba(0,0,0,.26); }
.modal h2 { margin: 0 0 10px; }
.modal p { color: var(--muted); line-height: 1.5; }
.modal-actions { display: grid; gap: 10px; margin-top: 20px; }
.field { display: grid; gap: 7px; margin-top: 16px; text-align: left; }
.field label { font-size: .82rem; font-weight: 750; }
.field input, .field select { width: 100%; min-height: 50px; padding: 11px 13px; border-radius: 14px; border: 1px solid var(--line); color: var(--ink); background: var(--canvas); }
.toast { position: fixed; z-index: 130; left: 50%; bottom: calc(96px + var(--safe-bottom)); transform: translateX(-50%); width: min(calc(100% - 32px), 500px); padding: 13px 16px; border-radius: 15px; color: #fff; background: #251b35; box-shadow: var(--shadow); text-align: center; font-weight: 650; }
.toast--error { background: #8f2438; }
.empty { padding: 28px 22px; text-align: center; }
.empty h2 { margin: 0 0 7px; }
.empty p { margin: 0 0 18px; color: var(--muted); line-height: 1.45; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (min-width: 760px) {
  .app-frame { padding-top: 18px; }
  .topbar { top: 18px; width: min(calc(100% - 36px), 596px); margin: 0 auto; border: 1px solid var(--line); border-radius: 22px 22px 0 0; }
  .screen { padding-top: 18px; }
  .bottom-nav { bottom: 18px; }
  .card { box-shadow: 0 8px 26px rgba(64,45,96,.045); }
}

@media (max-width: 380px) {
  .screen { padding-inline: 12px; }
  .guide { grid-template-columns: 1fr 80px; }
  .guide__character { width: 80px; height: 104px; }
  .button-row { grid-template-columns: 1fr; }
  .tab { font-size: .61rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}