:root {
  color-scheme: light dark;
  --accent: #4f63d8;
  --accent-strong: #3f51c6;
  --positive: #497a61;
  --warning: #9a6a2f;
  --danger: #a24343;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-soft: 0 12px 40px rgba(20, 24, 40, .06);
  --max: 1120px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

:root,
[data-theme="frost"] {
  --bg: #f5f6f8;
  --surface: rgba(255,255,255,.9);
  --surface-solid: #ffffff;
  --surface-raised: #fdfdfd;
  --text: #111318;
  --text-2: #616774;
  --text-3: #8b919d;
  --border: rgba(17,19,24,.08);
  --track: #e6e8ee;
  --nav: rgba(248,249,251,.9);
}

[data-theme="porcelain"] {
  --bg: #f6f3ee;
  --surface: rgba(255,253,249,.92);
  --surface-solid: #fffdf9;
  --surface-raised: #fbf7f1;
  --text: #181613;
  --text-2: #6d675f;
  --text-3: #9a938a;
  --border: rgba(50,42,32,.08);
  --track: #e8e1d8;
  --nav: rgba(248,244,238,.92);
}

[data-theme="graphite"] {
  color-scheme: dark;
  --bg: #111214;
  --surface: rgba(31,33,37,.94);
  --surface-solid: #1d1f23;
  --surface-raised: #25272c;
  --text: #f4f5f7;
  --text-2: #b5bac4;
  --text-3: #858b96;
  --border: rgba(255,255,255,.08);
  --track: #30333a;
  --nav: rgba(20,21,24,.92);
  --shadow-soft: 0 14px 44px rgba(0,0,0,.25);
}

[data-theme="midnight"] {
  color-scheme: dark;
  --bg: #0d1118;
  --surface: rgba(25,31,42,.95);
  --surface-solid: #181e29;
  --surface-raised: #202837;
  --text: #f3f6fb;
  --text-2: #aeb8c8;
  --text-3: #7f8998;
  --border: rgba(224,232,246,.09);
  --track: #293244;
  --nav: rgba(15,19,27,.94);
  --shadow-soft: 0 14px 44px rgba(0,0,0,.28);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
img, svg { display: block; max-width: 100%; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed; left: 16px; top: -60px; z-index: 1000; padding: 10px 14px;
  background: var(--text); color: var(--bg); border-radius: 10px; text-decoration: none;
}
.skip-link:focus { top: 16px; }

.public-shell { min-height: 100vh; }
.public-nav {
  position: sticky; top: 0; z-index: 20; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid var(--border);
}
.public-nav__inner {
  max-width: var(--max); margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.025em; text-decoration: none; }
.brand-mark { width: 30px; height: 30px; border-radius: 9px; }
.public-nav__links { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.public-nav__links a { color: var(--text-2); text-decoration: none; font-size: 14px; }
.public-nav__links a:hover { color: var(--text); }

.btn {
  appearance: none; border: 0; border-radius: 14px; min-height: 46px; padding: 0 18px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer;
  font-weight: 650; text-decoration: none; transition: transform .16s ease, background .16s ease, opacity .16s ease;
}
.btn:active { transform: scale(.98); }
.btn:focus-visible, .icon-btn:focus-visible, .scale-btn:focus-visible, .chip:focus-visible, .nav-tab:focus-visible,
.theme-tile:focus-visible, .toggle-row input:focus-visible + .toggle-track { outline: 3px solid color-mix(in srgb, var(--accent) 42%, transparent); outline-offset: 3px; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-secondary { background: var(--surface-solid); color: var(--text); border: 1px solid var(--border); }
.btn-quiet { background: transparent; color: var(--text-2); }
.btn-danger { background: color-mix(in srgb, var(--danger) 14%, var(--surface-solid)); color: var(--danger); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

.hero { max-width: 920px; margin: 0 auto; padding: 112px 24px 64px; text-align: center; }
.hero-eyebrow { color: var(--accent); font-weight: 650; font-size: 14px; margin-bottom: 20px; }
.hero h1 { margin: 0; font-size: clamp(52px, 8vw, 88px); line-height: .98; letter-spacing: -.06em; font-weight: 760; }
.hero p { max-width: 680px; margin: 28px auto 0; font-size: clamp(19px, 2vw, 24px); color: var(--text-2); letter-spacing: -.018em; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.hero-trust { margin-top: 20px; color: var(--text-3); font-size: 13px; }

.preview-wrap { max-width: 860px; margin: 18px auto 110px; padding: 0 24px; }
.preview-card {
  background: var(--surface-solid); border: 1px solid var(--border); border-radius: 34px; padding: 26px;
  box-shadow: var(--shadow-soft); display: grid; gap: 18px;
}
.preview-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.preview-kicker { color: var(--text-3); font-size: 13px; }
.preview-value { font-size: 44px; font-weight: 720; letter-spacing: -.05em; }
.preview-chart { height: 160px; background: linear-gradient(to bottom, transparent 49%, var(--border) 50%, transparent 51%); border-radius: 20px; overflow: hidden; }
.preview-insight { padding: 18px; border-radius: 20px; background: var(--surface-raised); }
.preview-insight strong { display: block; margin-bottom: 5px; }
.preview-insight p { margin: 0; color: var(--text-2); }

.section { max-width: var(--max); margin: 0 auto; padding: 88px 24px; }
.section-narrow { max-width: 780px; }
.section h2 { font-size: clamp(34px, 4.4vw, 56px); line-height: 1.02; letter-spacing: -.045em; margin: 0 0 18px; }
.section-lede { color: var(--text-2); font-size: 20px; max-width: 720px; margin: 0 0 42px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { background: var(--surface-solid); border: 1px solid var(--border); border-radius: 24px; padding: 24px; }
.feature-card h3 { margin: 16px 0 8px; letter-spacing: -.02em; }
.feature-card p { margin: 0; color: var(--text-2); }
.feature-icon { width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 11%, transparent); color: var(--accent); font-weight: 700; }
.prose { font-size: 17px; }
.prose h1 { font-size: clamp(42px, 6vw, 64px); letter-spacing: -.05em; line-height: 1; margin: 42px 0 22px; }
.prose h2 { font-size: 28px; letter-spacing: -.03em; margin-top: 44px; }
.prose p, .prose li { color: var(--text-2); }
.prose strong { color: var(--text); }
.prose a { color: var(--accent); }
.notice { border: 1px solid var(--border); background: var(--surface-solid); border-radius: 20px; padding: 20px; }
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.support-card { background: var(--surface-solid); border: 1px solid var(--border); border-radius: 24px; padding: 24px; }
.support-card h2, .support-card h3 { margin-top: 0; }
.support-card p { color: var(--text-2); }
.footer { border-top: 1px solid var(--border); margin-top: 60px; }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 30px 24px 42px; color: var(--text-3); font-size: 13px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer a { color: var(--text-2); }

.app-body { min-height: 100vh; }
#app { min-height: 100vh; }
.app-shell { min-height: 100vh; padding-bottom: calc(86px + var(--safe-bottom)); }
.app-topbar {
  height: 64px; display: flex; align-items: center; max-width: 920px; margin: 0 auto; padding: 0 20px;
  position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid var(--border);
}
.app-topbar .brand { font-size: 15px; }
.app-topbar__actions { margin-left: auto; display: flex; gap: 6px; }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border: 0; background: transparent; color: var(--text-2); border-radius: 12px; cursor: pointer; }
.icon-btn:hover { background: var(--surface-raised); color: var(--text); }
.app-main { max-width: 760px; margin: 0 auto; padding: 28px 20px 60px; }
.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.page-heading h1 { margin: 0; font-size: clamp(34px, 7vw, 48px); line-height: 1; letter-spacing: -.05em; }
.page-heading p { margin: 10px 0 0; color: var(--text-2); }

.app-card { background: var(--surface-solid); border: 1px solid var(--border); border-radius: 24px; padding: 22px; box-shadow: 0 8px 30px rgba(20,24,40,.025); }
.stack { display: grid; gap: 14px; }
.stack-lg { display: grid; gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.metric-card { min-height: 138px; display: flex; flex-direction: column; }
.metric-label { color: var(--text-2); font-size: 14px; }
.metric-number { margin-top: 8px; font-size: 38px; line-height: 1; letter-spacing: -.05em; font-weight: 720; }
.metric-meta { color: var(--text-3); font-size: 12px; margin-top: auto; padding-top: 16px; }
.sparkline { height: 44px; margin-top: 12px; }
.empty-state { text-align: center; padding: 38px 18px; }
.empty-state h2 { margin: 0 0 8px; letter-spacing: -.03em; }
.empty-state p { color: var(--text-2); max-width: 430px; margin: 0 auto 20px; }

.bottom-nav {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 0; z-index: 40;
  width: min(100%, 760px); display: grid; grid-template-columns: repeat(4, 1fr); padding: 8px 12px calc(8px + var(--safe-bottom));
  background: var(--nav); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border-top: 1px solid var(--border);
}
.nav-tab { border: 0; background: transparent; color: var(--text-3); border-radius: 12px; min-height: 54px; cursor: pointer; display: grid; place-items: center; gap: 2px; font-size: 11px; }
.nav-tab svg { width: 21px; height: 21px; }
.nav-tab.is-active { color: var(--accent); }

.onboarding, .lock-screen { min-height: 100vh; display: grid; place-items: center; padding: 28px 20px; }
.onboarding-panel { width: min(100%, 620px); }
.onboarding-progress { display: flex; gap: 6px; margin-bottom: 26px; }
.onboarding-progress span { height: 4px; flex: 1; border-radius: 100px; background: var(--track); }
.onboarding-progress span.is-active { background: var(--accent); }
.onboarding h1, .lock-screen h1 { font-size: clamp(38px, 8vw, 58px); line-height: 1; letter-spacing: -.055em; margin: 0 0 16px; }
.onboarding .lede, .lock-screen .lede { font-size: 18px; color: var(--text-2); margin: 0 0 28px; }
.privacy-points { display: grid; gap: 12px; margin: 24px 0 30px; }
.privacy-point { display: flex; align-items: flex-start; gap: 12px; color: var(--text-2); }
.privacy-point strong { color: var(--text); display: block; }
.privacy-dot { width: 34px; height: 34px; flex: 0 0 34px; border-radius: 11px; background: var(--surface-solid); border: 1px solid var(--border); display: grid; place-items: center; color: var(--accent); }

.choice-grid { display: grid; gap: 10px; }
.choice-card { position: relative; display: block; }
.choice-card input { position: absolute; opacity: 0; pointer-events: none; }
.choice-card__surface { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border: 1px solid var(--border); background: var(--surface-solid); border-radius: 18px; cursor: pointer; transition: border-color .15s ease, transform .15s ease, background .15s ease; }
.choice-card input:checked + .choice-card__surface { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); background: color-mix(in srgb, var(--accent) 7%, var(--surface-solid)); }
.choice-card input:focus-visible + .choice-card__surface { outline: 3px solid color-mix(in srgb, var(--accent) 42%, transparent); outline-offset: 2px; }
.choice-card__title { font-weight: 650; }
.choice-card__desc { color: var(--text-2); font-size: 13px; margin-top: 2px; }
.choice-check { margin-left: auto; width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--border); display: grid; place-items: center; color: transparent; }
.choice-card input:checked + .choice-card__surface .choice-check { background: var(--accent); color: white; border-color: var(--accent); }

.pin-input { width: 100%; min-height: 62px; border: 1px solid var(--border); background: var(--surface-solid); color: var(--text); border-radius: 18px; padding: 0 18px; font-size: 28px; letter-spacing: .28em; text-align: center; }
.pin-input:focus { outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent); border-color: var(--accent); }
.field-label { display: block; font-weight: 650; margin-bottom: 8px; }
.field-help { color: var(--text-3); font-size: 13px; margin-top: 8px; }
.error-text { color: var(--danger); font-size: 13px; margin-top: 8px; }

.checkin-shell { min-height: calc(100vh - 64px); display: flex; flex-direction: column; }
.checkin-head { padding: 18px 20px 0; max-width: 720px; width: 100%; margin: 0 auto; }
.checkin-progress { height: 4px; border-radius: 999px; overflow: hidden; background: var(--track); }
.checkin-progress > span { display: block; height: 100%; background: var(--accent); transition: width .25s ease; }
.checkin-count { color: var(--text-3); font-size: 12px; margin-top: 10px; }
.question-wrap { flex: 1; display: grid; place-items: center; padding: 26px 20px 120px; }
.question-card { width: min(100%, 620px); }
.question-card h1 { font-size: clamp(36px, 8vw, 58px); line-height: 1.03; letter-spacing: -.052em; margin: 0; text-align: center; }
.question-help { max-width: 500px; margin: 14px auto 30px; text-align: center; color: var(--text-2); }
.scale-value { text-align: center; font-size: 64px; font-weight: 730; letter-spacing: -.06em; margin: 20px 0; }
.scale-grid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 7px; }
.scale-btn { aspect-ratio: 1; min-width: 0; border: 0; background: var(--surface-solid); color: var(--text-2); border-radius: 50%; cursor: pointer; transition: transform .12s ease, background .12s ease, color .12s ease; }
.scale-btn:hover { transform: translateY(-1px); }
.scale-btn.is-selected { background: var(--accent); color: white; }
.scale-anchors { display: flex; justify-content: space-between; color: var(--text-3); font-size: 12px; margin-top: 9px; }
.range-wrap { max-width: 480px; margin: 28px auto; }
.range-wrap input[type="range"] { width: 100%; accent-color: var(--accent); }
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.chip { min-height: 42px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface-solid); color: var(--text-2); cursor: pointer; }
.chip.is-selected { background: var(--accent); color: white; border-color: var(--accent); }
.question-actions { display: flex; justify-content: center; gap: 10px; margin-top: 32px; flex-wrap: wrap; }

.swipe-card { max-width: 460px; min-height: 250px; margin: 26px auto 0; border: 1px solid var(--border); border-radius: 30px; background: var(--surface-solid); box-shadow: var(--shadow-soft); display: grid; place-items: center; padding: 28px; touch-action: pan-y; user-select: none; transition: transform .18s ease; position: relative; overflow: hidden; }
.swipe-card.is-dragging { transition: none; }
.swipe-card__hint { color: var(--text-3); font-size: 13px; text-align: center; }
.swipe-card__label { font-size: 30px; font-weight: 680; letter-spacing: -.035em; text-align: center; }
.swipe-card__edge { position: absolute; top: 16px; font-size: 12px; font-weight: 650; opacity: .45; }
.swipe-card__edge.left { left: 18px; color: var(--text-2); }
.swipe-card__edge.right { right: 18px; color: var(--accent); }
.swipe-actions { display: flex; justify-content: center; gap: 12px; margin-top: 18px; }
.swipe-actions .btn { min-width: 112px; }

.private-note { width: 100%; min-height: 180px; resize: vertical; border: 1px solid var(--border); border-radius: 20px; background: var(--surface-solid); color: var(--text); padding: 16px; line-height: 1.5; }
.private-note:focus { outline: 3px solid color-mix(in srgb, var(--accent) 32%, transparent); border-color: var(--accent); }
.private-note-label { display: flex; align-items: center; justify-content: center; gap: 6px; color: var(--text-2); font-size: 13px; margin: 8px 0 14px; }

.history-row { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.history-row:last-child { border-bottom: 0; }
.history-date { width: 86px; }
.history-date strong { display: block; }
.history-date span { color: var(--text-3); font-size: 12px; }
.history-values { flex: 1; color: var(--text-2); font-size: 13px; }
.history-score { font-size: 22px; font-weight: 680; }

.settings-section h2 { font-size: 18px; letter-spacing: -.02em; margin: 0 0 10px 4px; }
.settings-list { background: var(--surface-solid); border: 1px solid var(--border); border-radius: 22px; overflow: hidden; }
.settings-row { min-height: 58px; padding: 12px 16px; display: flex; align-items: center; gap: 14px; border-bottom: 1px solid var(--border); }
.settings-row:last-child { border-bottom: 0; }
.settings-row__meta { flex: 1; }
.settings-row__meta strong { display: block; }
.settings-row__meta span { display: block; color: var(--text-3); font-size: 12px; margin-top: 2px; }
.settings-row select { border: 0; background: var(--surface-raised); color: var(--text); border-radius: 10px; padding: 8px 10px; }
.toggle-row { cursor: pointer; }
.toggle-row input { position: absolute; opacity: 0; }
.toggle-track { width: 46px; height: 27px; border-radius: 999px; background: var(--track); padding: 3px; transition: background .15s ease; }
.toggle-thumb { width: 21px; height: 21px; border-radius: 50%; background: white; box-shadow: 0 1px 4px rgba(0,0,0,.2); transition: transform .15s ease; }
.toggle-row input:checked + .toggle-track { background: var(--accent); }
.toggle-row input:checked + .toggle-track .toggle-thumb { transform: translateX(19px); }

.theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.theme-tile { border: 1px solid var(--border); border-radius: 18px; padding: 12px; background: var(--surface-solid); color: var(--text); cursor: pointer; text-align: left; }
.theme-tile.is-selected { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.theme-preview { height: 70px; border-radius: 12px; margin-bottom: 10px; position: relative; overflow: hidden; border: 1px solid rgba(128,128,128,.15); }
.theme-preview::after { content: ""; position: absolute; left: 12px; right: 12px; top: 14px; height: 8px; border-radius: 8px; background: currentColor; opacity: .85; box-shadow: 0 18px 0 color-mix(in srgb, currentColor 35%, transparent), 0 32px 0 color-mix(in srgb, currentColor 20%, transparent); }
.theme-preview.frost { background:#f5f6f8; color:#111318; }
.theme-preview.porcelain { background:#f6f3ee; color:#181613; }
.theme-preview.graphite { background:#111214; color:#f4f5f7; }
.theme-preview.midnight { background:#0d1118; color:#f3f6fb; }

.modal-backdrop { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.38); display: grid; place-items: end center; padding: 18px; }
.modal { width: min(100%, 620px); max-height: 88vh; overflow: auto; background: var(--surface-solid); border-radius: 28px; padding: 24px; box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.modal h2 { margin: 0 0 10px; font-size: 28px; letter-spacing: -.035em; }
.modal p { color: var(--text-2); }

.report { display: none; }
@media print {
  body { background: white !important; color: #111 !important; }
  .app-shell, .modal-backdrop { display: none !important; }
  .report { display: block; padding: 24px; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
  .report h1 { font-size: 30px; margin-bottom: 4px; }
  .report small, .report p { color: #444; }
  .report table { width: 100%; border-collapse: collapse; margin-top: 18px; }
  .report th, .report td { text-align: left; border-bottom: 1px solid #ddd; padding: 8px 4px; font-size: 12px; }
}

@media (max-width: 760px) {
  .public-nav__links a:not(.btn) { display: none; }
  .hero { padding-top: 80px; }
  .feature-grid, .support-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .public-nav__inner { padding-inline: 16px; }
  .hero, .section, .preview-wrap { padding-left: 18px; padding-right: 18px; }
  .hero h1 { font-size: 52px; }
  .grid-2 { grid-template-columns: 1fr; }
  .app-main { padding-left: 16px; padding-right: 16px; }
  .scale-grid { gap: 4px; }
  .scale-btn { font-size: 12px; }
  .question-card h1 { font-size: 38px; }
  .theme-grid { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; }
}