/*
  Training Tracker website. Mirrors the app's visual language
  (Training Tracker/DesignSystem.swift): native inset-grouped surfaces, one
  indigo accent for interaction, green/red for progress, gold for personal
  records only, an expanded display face for titles and rounded numerals.
  The hero card is the only large color field.
*/

:root {
  color-scheme: light dark;

  /* Theme tokens (light) */
  --accent: #4F46E5;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --positive: #15803D;
  --negative: #DC2626;
  --record: #D97706;
  --flame: #EA580C;
  --hero-from: #4F46E5;
  --hero-to: #7C3AED;

  /* iOS system surfaces */
  --bg: #F2F2F7;
  --card: #FFFFFF;
  --label: #000000;
  --label-2: rgba(60, 60, 67, 0.62);
  --label-3: rgba(60, 60, 67, 0.32);
  --separator: rgba(60, 60, 67, 0.16);
  --fill: rgba(118, 118, 128, 0.12);
  --bar: rgba(242, 242, 247, 0.78);
  --shadow: 0 1px 2px rgba(17, 12, 46, 0.04), 0 10px 30px rgba(17, 12, 46, 0.06);
  --phone-edge: #1d1d22;

  /* Radii and spacing */
  --r-tile: 12px;
  --r-control: 14px;
  --r-panel: 20px;
  --r-hero: 28px;
  --gutter: 16px;

  --font-text: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  --font-rounded: ui-rounded, "SF Pro Rounded", var(--font-text);
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #7B78FF;
    --accent-soft: rgba(123, 120, 255, 0.18);
    --positive: #4ADE80;
    --negative: #F87171;
    --record: #FBBF24;
    --flame: #FB923C;
    --hero-from: #4338CA;
    --hero-to: #6D28D9;

    --bg: #000000;
    --card: #1C1C1E;
    --label: #FFFFFF;
    --label-2: rgba(235, 235, 245, 0.62);
    --label-3: rgba(235, 235, 245, 0.32);
    --separator: rgba(84, 84, 88, 0.55);
    --fill: rgba(118, 118, 128, 0.24);
    --bar: rgba(0, 0, 0, 0.72);
    --shadow: none;
    --phone-edge: #3a3a40;
  }
}

/* Language switching: every localized block has one child per language. */
html:not(.js) .l10n > [lang]:not([lang="en"]),
.js[data-lang="en"] .l10n > [lang]:not([lang="en"]),
.js[data-lang="de"] .l10n > [lang]:not([lang="de"]),
.js[data-lang="fr"] .l10n > [lang]:not([lang="fr"]),
.js[data-lang="uk"] .l10n > [lang]:not([lang="uk"]),
.js[data-lang="es"] .l10n > [lang]:not([lang="es"]),
.js[data-lang="ja"] .l10n > [lang]:not([lang="ja"]),
.js[data-lang="pt"] .l10n > [lang]:not([lang="pt"]) {
  display: none !important;
}

/* Base */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--label);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

:lang(ja) { line-break: strict; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 8px;
}

img { max-width: 100%; display: block; }
p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }
ul { margin: 0 0 12px; padding-left: 22px; }
li { margin-bottom: 6px; }
li:last-child { margin-bottom: 0; }
strong { font-weight: 650; }

.icon {
  width: 1em;
  height: 1em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.wrap.narrow { max-width: 760px; }

@media (min-width: 640px) {
  :root { --gutter: 24px; }
}

/* Typography: expanded display face for titles, like Font.display */

.display {
  font-weight: 800;
  font-stretch: 125%;
  font-variation-settings: "wdth" 125;
  letter-spacing: -0.005em;
  line-height: 1.12;
}

:lang(ja) .display, .display:lang(ja) { letter-spacing: 0; }

.metric {
  font-family: var(--font-rounded);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.secondary { color: var(--label-2); }

/* Top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bar);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--separator);
}

.topbar .wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--label);
  font-size: 17px;
  min-width: 0;
}

.brand:hover { text-decoration: none; }

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 22.5%;
  box-shadow: 0 0 0 0.5px var(--separator);
}

.brand span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.nav {
  display: none;
  gap: 4px;
  margin-left: auto;
}

.nav a {
  color: var(--label-2);
  font-size: 15px;
  font-weight: 600;
  padding: 7px 12px;
  border-radius: 999px;
}

.nav a:hover { color: var(--label); background: var(--fill); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }

@media (min-width: 760px) {
  .nav { display: flex; }
  .nav + .lang-picker { margin-left: 4px; }
}

/* Language picker: a soft accent chip like ChipButtonStyle */

.lang-picker {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: auto;
  flex: none;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
}

html:not(.js) .lang-picker { display: none; }

.lang-picker .icon {
  position: absolute;
  left: 11px;
  font-size: 16px;
  pointer-events: none;
}

.lang-picker .icon.chevron {
  left: auto;
  right: 10px;
  font-size: 12px;
  stroke-width: 2.6;
}

.lang-picker select {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  min-height: 36px;
  padding: 0 28px 0 34px;
  border-radius: 999px;
  cursor: pointer;
}

.lang-picker select option { color: initial; }

/* Page header (docs) */

.page-head {
  padding: 36px 0 8px;
}

.page-head h1 {
  font-size: clamp(34px, 7vw, 46px);
  margin: 0 0 10px;
}

.page-head .lead {
  font-size: 19px;
  color: var(--label-2);
  margin: 0;
  max-width: 34em;
}

.page-head .meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--label-2);
}

/* Sections and cards: inset-grouped panels under bold section titles */

.section { margin-top: 32px; }

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
  margin: 0 0 12px;
  padding: 0 4px;
}

.card {
  background: var(--card);
  border-radius: var(--r-panel);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}

.card + .card { margin-top: 12px; }

.card h3 {
  font-size: 17px;
  margin: 18px 0 6px;
}

.card h3:first-child { margin-top: 0; }

.footnote {
  font-size: 14px;
  color: var(--label-2);
  margin: 10px 4px 0;
}

/* Icon tiles: Settings-style colored squares with a white symbol (IconTile) */

.tile {
  --c: var(--accent);
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 8.5px;
  color: #fff;
  background: linear-gradient(180deg, color-mix(in srgb, var(--c) 78%, #fff), var(--c));
  font-size: 17px;
}

.tile .icon { stroke-width: 2.2; }
.tile.lg { width: 44px; height: 44px; border-radius: 12px; font-size: 24px; }

.c-indigo { --c: #5856D6; }
.c-orange { --c: #FF9500; }
.c-teal { --c: #30B0C7; }
.c-pink { --c: #FF2D55; }
.c-blue { --c: #007AFF; }
.c-purple { --c: #AF52DE; }
.c-green { --c: #34C759; }
.c-gray { --c: #8E8E93; }
.c-gold { --c: var(--record); }
.c-accent { --c: var(--accent); }
.c-flame { --c: var(--flame); }

/* Grouped rows */

.group {
  background: var(--card);
  border-radius: var(--r-panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 18px;
  position: relative;
}

.row + .row::before,
.faq + .faq::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 62px;
  border-top: 0.5px solid var(--separator);
}

.faq + .faq::before { left: 18px; }

.row .tile { margin-top: 1px; }
.row-title { font-weight: 650; display: block; }
.row-text { color: var(--label-2); font-size: 15px; display: block; }

/* FAQ disclosure rows */

.faq { position: relative; }

.faq summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  font-weight: 600;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary .chevron {
  margin-left: auto;
  color: var(--label-3);
  font-size: 15px;
  stroke-width: 2.6;
  transition: transform 0.25s ease;
}

.faq[open] summary .chevron { transform: rotate(180deg); color: var(--accent); }

.faq .answer {
  padding: 0 18px 16px;
  color: var(--label);
}

.faq .answer p, .faq .answer li { color: var(--label-2); }
.faq .answer strong, .faq .answer .ui { color: var(--label); }

.ui { font-weight: 600; }

kbd, code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--fill);
  border-radius: 6px;
  padding: 1px 6px;
}

pre {
  margin: 10px 0 0;
  padding: 12px 14px;
  background: var(--fill);
  border-radius: var(--r-tile);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.55;
}

pre code { background: none; padding: 0; font-size: inherit; }

/* Buttons: accent capsule (PrimaryButtonStyle) and soft chip */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 26px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 17px;
  font-weight: 650;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover { text-decoration: none; opacity: 0.92; }
.btn:active { transform: scale(0.97); }
.btn .icon { font-size: 18px; stroke-width: 2.4; }

.btn.soft { background: var(--accent-soft); color: var(--accent); }
.btn.light { background: #fff; color: #4338CA; }
.btn.glass { background: rgba(255, 255, 255, 0.18); color: #fff; }

/* Badges */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  white-space: nowrap;
}

.badge .icon { font-size: 12px; stroke-width: 2.6; }

/* Contact card */

.contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 20px;
}

.contact .text { flex: 1 1 260px; }
.contact .text strong { display: block; font-size: 19px; }

/* Footer */

.footer {
  margin-top: 56px;
  padding: 28px 0 40px;
  border-top: 0.5px solid var(--separator);
  font-size: 14px;
  color: var(--label-2);
}

.footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
  justify-content: space-between;
}

.footer nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.footer a { color: var(--label-2); }
.footer a:hover { color: var(--accent); }

/* Marketing: hero card, the page's only large color field */

.hero {
  position: relative;
  margin-top: 20px;
  border-radius: var(--r-hero);
  background: linear-gradient(135deg, var(--hero-from), var(--hero-to));
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 70%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 62%);
  z-index: -1;
}

.hero-inner {
  display: grid;
  gap: 28px;
  padding: 32px 24px 0;
}

.hero-icon {
  width: 84px;
  height: 84px;
  border-radius: 22.5%;
  box-shadow: 0 10px 30px rgba(20, 8, 70, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.hero h1 {
  font-size: clamp(38px, 8vw, 60px);
  margin: 20px 0 12px;
}

.hero .tagline {
  font-size: clamp(19px, 2.6vw, 22px);
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.86);
  max-width: 28em;
  margin: 0 0 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.hero-chips .badge {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  font-weight: 650;
}

.hero-chips .badge.streak .icon { color: #FDBA74; }
.hero-chips .badge.record .icon { color: #FBBF24; }

.hero-shots {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  height: 380px;
  overflow: hidden;
  margin: 0 -24px;
}

.hero-shots .phone { width: 250px; flex: none; }
.hero-shots .phone.back { display: none; }

@media (min-width: 880px) {
  .hero-inner {
    grid-template-columns: 1.05fr 1fr;
    align-items: center;
    padding: 56px 0 0 56px;
    gap: 24px;
  }

  .hero-copy { padding-bottom: 56px; }

  .hero-shots {
    height: 560px;
    margin: 0;
    align-self: end;
  }

  .hero-shots .phone { width: 270px; position: absolute; top: 40px; }
  .hero-shots .phone.front { left: 4%; z-index: 1; }
  .hero-shots .phone.back { display: block; left: 46%; top: 88px; opacity: 0.96; }
}

/* Phone frame (drawn, not Apple's bezel) */

.phone {
  position: relative;
  padding: 9px;
  border-radius: 46px;
  background: var(--phone-edge);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset, 0 24px 60px rgba(17, 12, 46, 0.32);
}

.phone img,
.phone picture {
  border-radius: 37px;
  width: 100%;
  height: auto;
  aspect-ratio: 590 / 1282;
  background: var(--bg);
}

.phone picture img { border-radius: inherit; }

/* Marketing: features */

.intro {
  text-align: center;
  max-width: 40em;
  margin: 64px auto 28px;
}

.intro h2 { font-size: clamp(28px, 5vw, 38px); margin: 0 0 12px; }
.intro p { font-size: 19px; color: var(--label-2); }

.features {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 980px) {
  .features { grid-template-columns: repeat(3, 1fr); }
}

.feature {
  background: var(--card);
  border-radius: var(--r-panel);
  box-shadow: var(--shadow);
  padding: 22px 22px 24px;
}

.feature h3 {
  font-size: 19px;
  margin: 16px 0 8px;
}

.feature p { color: var(--label-2); font-size: 16px; }

/* Marketing: screenshot gallery */

.gallery {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px var(--gutter) 28px;
  margin: 0 calc(var(--gutter) * -1);
  scrollbar-width: none;
}

.gallery::-webkit-scrollbar { display: none; }

.shot {
  flex: 0 0 min(72vw, 270px);
  scroll-snap-align: center;
  margin: 0;
}

.shot figcaption {
  margin-top: 16px;
  text-align: center;
}

.shot figcaption strong { display: block; font-size: 17px; }
.shot figcaption span { font-size: 15px; color: var(--label-2); }

@media (min-width: 900px) {
  .gallery { justify-content: center; overflow: visible; }
}

/* Marketing: privacy band and closing call to action */

.split {
  display: grid;
  gap: 12px;
}

@media (min-width: 760px) {
  .split { grid-template-columns: 1fr 1fr; }
}

.checks { list-style: none; padding: 0; margin: 0; }

.checks li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.checks .icon { color: var(--positive); font-size: 20px; margin-top: 2px; stroke-width: 2.6; }

.cta {
  text-align: center;
  padding: 40px 24px;
}

.cta img {
  width: 76px;
  height: 76px;
  border-radius: 22.5%;
  margin: 0 auto 18px;
  box-shadow: var(--shadow);
}

.cta h2 { font-size: clamp(26px, 5vw, 34px); margin: 0 0 10px; }
.cta p { color: var(--label-2); margin-bottom: 22px; }

.langs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

@media print {
  .topbar, .lang-picker, .footer nav { display: none; }
  body { background: #fff; }
  .card, .group, .feature { box-shadow: none; border: 1px solid #ddd; }
  .faq .answer { display: block; }
}

.section-title.intro-title {
  justify-content: center;
  text-align: center;
  font-size: clamp(26px, 4.5vw, 34px);
  margin-top: 64px;
  margin-bottom: 20px;
}

.split > .card + .card { margin-top: 0; }

@media (max-width: 400px) {
  .brand span { display: none; }
}

@media (max-width: 639px) {
  .contact { align-items: flex-start; }
}