/* ─────────────── tokens ─────────────── */

:root {
  /* surfaces */
  --bg: #f4f6f9;
  --bg-soft: #ebeef3;
  --bg-tinted: #eaf2fb;         /* soft blue wash, like recording screen */
  --bg-tinted-warm: #fff1e5;    /* soft sauna/onsen warm wash */
  --card: #ffffff;

  /* labels (iOS systemLabel scale) */
  --fg: #1c1c1e;
  --fg-muted: #3c3c43a8;        /* iOS secondaryLabel */
  --fg-dim: #3c3c4399;          /* iOS tertiaryLabel */
  --rule: rgba(60, 60, 67, 0.14);
  --rule-soft: rgba(60, 60, 67, 0.06);

  /* activity / data colors (pulled from app screenshots) */
  --blue: #4da6ff;              /* soak / temp / primary */
  --blue-strong: #1f86ec;
  --red: #ff3b30;               /* heart rate peaks */
  --red-soft: #ff5a5f;
  --orange: #ff9500;            /* sauna */
  --orange-soft: #ffb366;
  --pink: #ff375f;              /* favorites */
  --green: #34c759;             /* positive / home */
  --cold: #6ba7d6;              /* cold plunge — muted blue */

  --shadow-card: 0 1px 2px rgba(18, 24, 40, 0.04), 0 4px 16px rgba(18, 24, 40, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(18, 24, 40, 0.06), 0 12px 28px rgba(18, 24, 40, 0.1);
  --shadow-phone: 0 30px 60px -20px rgba(18, 24, 40, 0.22), 0 10px 24px -8px rgba(77, 166, 255, 0.18);
  --shadow-watch: 0 18px 32px -10px rgba(18, 24, 40, 0.35);

  --radius-card: 20px;
  --radius-card-sm: 14px;
  --radius-pill: 999px;
  --radius-phone: 40px;
  --radius-watch: 36px;

  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro", "Helvetica Neue", "Noto Sans JP", system-ui, sans-serif;
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro", "Noto Sans JP", sans-serif;
  --font-num: "Inter", "SF Pro Rounded", -apple-system, system-ui, sans-serif;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

:lang(ja) {
  --font-body: "Noto Sans JP", "Inter", -apple-system, sans-serif;
  --font-display: "Noto Sans JP", "Inter", -apple-system, sans-serif;
}

/* ─────────────── reset ─────────────── */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.5;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─────────────── typography ─────────────── */

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue-strong);
}

.eyebrow--warm { color: var(--orange); }
.eyebrow--cool { color: var(--blue-strong); }
.eyebrow--hot { color: var(--red-soft); }

.section-heading,
.feature-heading {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--fg);
}

.section-heading { font-size: clamp(1.9rem, 3.8vw, 2.75rem); }
.feature-heading { font-size: clamp(1.7rem, 3vw, 2.3rem); }

:lang(ja) .section-heading,
:lang(ja) .feature-heading,
:lang(ja) .hero-title,
:lang(ja) .cta-heading {
  letter-spacing: -0.01em;
  line-height: 1.25;
}

/* ─────────────── buttons ─────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: transform 0.15s var(--ease-out), background 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--fg);
  color: #fff;
  box-shadow: 0 2px 6px rgba(28, 28, 30, 0.12);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(28, 28, 30, 0.2);
}

.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  color: var(--fg);
  background: rgba(28, 28, 30, 0.06);
}

.btn--ghost:hover { background: rgba(28, 28, 30, 0.1); }

/* Apple App Store download button */
.btn--app-store {
  padding: 11px 22px 11px 18px;
}

.btn--app-store .apple-logo {
  width: 22px;
  height: 26px;
  flex-shrink: 0;
  margin-top: -2px;
}

.btn--app-store .btn-label {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-align: left;
}

.btn--app-store .btn-label-small {
  font-size: 0.7rem;
  font-weight: 500;
  opacity: 0.8;
  letter-spacing: 0;
}

.btn--app-store .btn-label-large {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ─────────────── sticky header ─────────────── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 14px 0;
  transition: background 0.25s var(--ease-out), backdrop-filter 0.25s var(--ease-out), border-color 0.25s;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(244, 246, 249, 0.85);
  backdrop-filter: saturate(1.8) blur(20px);
  -webkit-backdrop-filter: saturate(1.8) blur(20px);
  border-bottom-color: var(--rule-soft);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--fg);
}

.site-nav {
  display: flex;
  gap: 32px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg-muted);
}

.site-nav a { transition: color 0.2s; }
.site-nav a:hover { color: var(--fg); }

.site-header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  padding: 6px 10px;
  background: rgba(28, 28, 30, 0.06);
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  transition: background 0.2s, color 0.2s;
}

.lang-switch:hover { background: rgba(28, 28, 30, 0.1); color: var(--fg); }

.site-header-cta {
  padding: 8px 18px;
  background: var(--fg);
  color: #fff;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  transition: transform 0.15s, background 0.2s;
}

.site-header-cta:hover {
  background: var(--blue-strong);
  transform: translateY(-1px);
}

/* ─────────────── HERO ─────────────── */

.hero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(180deg, var(--bg-tinted) 0%, var(--bg) 70%);
}

.hero-bg { position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }

.hero-bg-glow {
  position: absolute;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.45;
}

.hero-bg-glow--warm {
  top: -10%;
  right: -15%;
  background: radial-gradient(circle, rgba(255, 149, 0, 0.22), transparent 60%);
}

.hero-bg-glow--cool {
  bottom: -30%;
  left: -15%;
  background: radial-gradient(circle, rgba(77, 166, 255, 0.22), transparent 60%);
}

.hero-bg-steam { display: none; }

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 220px);
}

.hero-content { max-width: 620px; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 16px 0 20px;
  color: var(--fg);
}

.hero-title .accent { color: var(--blue-strong); }

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.55;
  color: var(--fg-muted);
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-platforms {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--card);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-card);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
}

.hero-platforms::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(52, 199, 89, 0.2);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 620px;
}

/* ─────────────── phone frames ─────────────── */

.phone-frame {
  position: relative;
  width: 300px;
  aspect-ratio: 1179 / 2556;
  border-radius: var(--radius-phone);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-phone);
  border: 8px solid #0f1115;
  transform-origin: center;
  transition: transform 0.4s var(--ease-out);
}

.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.phone-frame--hero {
  width: 340px;
  transform: rotate(-2deg);
  animation: hero-float 7s var(--ease-soft) infinite alternate;
}

.phone-frame--floating { width: 320px; transform: rotate(1.5deg); }

.phone-frame--hero:hover,
.phone-frame--floating:hover { transform: rotate(0deg) translateY(-6px); }

@keyframes hero-float {
  0%   { transform: rotate(-2deg) translateY(0); }
  100% { transform: rotate(-1deg) translateY(-10px); }
}

.feature-visual--stack {
  position: relative;
  min-height: 640px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-frame--stack-back {
  position: absolute;
  width: 280px;
  transform: translate(-80px, -24px) rotate(-4deg);
}

.phone-frame--stack-front {
  position: relative;
  width: 300px;
  transform: translate(50px, 30px) rotate(3deg);
  z-index: 2;
}

.phone-frame--stack-front:hover { transform: translate(50px, 20px) rotate(2deg); }
.phone-frame--stack-back:hover { transform: translate(-80px, -34px) rotate(-3deg); }

.watch-orbit {
  position: absolute;
  right: 6%;
  bottom: 12%;
  pointer-events: none;
}

.watch-frame {
  width: 130px;
  aspect-ratio: 416 / 496;
  border-radius: var(--radius-watch);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-watch);
  border: 6px solid #0a0a0c;
  pointer-events: auto;
  transition: transform 0.4s var(--ease-out);
}

.watch-frame img { width: 100%; height: 100%; object-fit: cover; }

.watch-frame--orbit {
  width: 118px;
  transform: rotate(5deg);
  animation: watch-wiggle 5s var(--ease-soft) infinite alternate;
}

@keyframes watch-wiggle {
  0%   { transform: rotate(5deg) translateY(0); }
  100% { transform: rotate(3deg) translateY(-6px); }
}

/* ─────────────── stats strip (iOS-style card) ─────────────── */

.stats-strip {
  padding: 40px 0 60px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 36px 24px;
  gap: 0;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 24px;
  text-align: center;
}

.stat:not(:last-child) {
  border-right: 1px solid var(--rule-soft);
}

.stat-value {
  font-family: var(--font-num);
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--blue-strong);
  font-variant-numeric: tabular-nums;
}

.stat:nth-child(2) .stat-value { color: var(--orange); }
.stat:nth-child(3) .stat-value { color: var(--red-soft); }

.stat-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

/* ─────────────── feature sections ─────────────── */

.feature-section {
  padding: 100px 0;
  position: relative;
}

.feature-section--reverse { background: var(--card); }

.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.feature-split--reverse > .feature-copy { order: 2; }
.feature-split--reverse > .feature-visual { order: 1; }

.feature-copy .eyebrow { margin-bottom: 14px; }

.feature-heading { margin-bottom: 16px; }

.feature-body {
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--fg-muted);
  margin-bottom: 28px;
  max-width: 520px;
}

.feature-body--wide {
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  text-wrap: pretty;
}

.bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bullet-list li {
  position: relative;
  padding: 18px 22px;
  background: var(--card);
  border-radius: var(--radius-card-sm);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s;
}

.feature-section--reverse .bullet-list li {
  background: var(--bg);
  box-shadow: none;
  border: 1px solid var(--rule-soft);
}

.bullet-list li:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.bullet-list strong {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  color: var(--fg);
  margin-bottom: 3px;
  letter-spacing: -0.005em;
}

.bullet-list span {
  display: block;
  font-size: 0.93rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

.feature-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  min-height: 640px;
}

/* ─────────────── watch section ─────────────── */

.watch-section {
  padding: 120px 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-tinted-warm) 50%, var(--bg) 100%);
  text-align: center;
  text-wrap: pretty;
}

.watch-section-inner { text-align: center; }

.watch-copy { max-width: 680px; margin: 0 auto 56px; }

.watch-copy .eyebrow { margin-bottom: 14px; }

.watch-row {
  display: flex;
  gap: 24px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.watch-row .watch-frame { width: 150px; }

.watch-row .watch-frame:nth-child(odd) { transform: rotate(-3deg) translateY(10px); }
.watch-row .watch-frame:nth-child(even) { transform: rotate(2deg); }

.watch-row .watch-frame:hover {
  transform: rotate(0deg) translateY(-6px) scale(1.04);
  z-index: 2;
}

/* ─────────────── features grid (app-like cards) ─────────────── */

.features-section { padding: 110px 0; background: var(--card); }

.features-heading {
  text-align: center;
  text-wrap: pretty;
  max-width: 680px;
  margin: 0 auto 56px;
}

.features-heading .eyebrow { margin-bottom: 14px; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  position: relative;
  padding: 32px;
  background: var(--bg);
  border-radius: var(--radius-card);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s;
  overflow: hidden;
  isolation: isolate;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out);
  z-index: 1;
}

.feature-card:nth-child(2)::before { background: var(--red-soft); }
.feature-card:nth-child(3)::before { background: var(--green); }
.feature-card:nth-child(4)::before { background: var(--orange); }

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  background: var(--card);
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-card-num {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(77, 166, 255, 0.1);
  color: var(--blue-strong);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.feature-card:nth-child(2) .feature-card-num {
  background: rgba(255, 59, 48, 0.1);
  color: var(--red);
}
.feature-card:nth-child(3) .feature-card-num {
  background: rgba(52, 199, 89, 0.1);
  color: var(--green);
}
.feature-card:nth-child(4) .feature-card-num {
  background: rgba(255, 149, 0, 0.1);
  color: var(--orange);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--fg);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* ─────────────── tech ─────────────── */

.tech-section { padding: 120px 0; background: var(--bg); }

.tech-heading { text-align: center; text-wrap: pretty; max-width: 720px; margin: 0 auto 56px; }
.tech-heading .eyebrow { margin-bottom: 14px; }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.tech-card {
  padding: 32px;
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s;
}

.tech-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.tech-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 10px;
  color: var(--fg);
}

.tech-card p {
  font-size: 0.98rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 780px;
  margin: 0 auto;
}

.tech-chip {
  padding: 6px 14px;
  background: var(--card);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius-pill);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.tech-chip:hover {
  color: var(--blue-strong);
  border-color: var(--blue);
  background: rgba(77, 166, 255, 0.06);
}

/* ─────────────── FAQ ─────────────── */

.faq-section { padding: 120px 0; background: var(--card); }

.faq-heading { text-align: center; text-wrap: pretty; max-width: 620px; margin: 0 auto 48px; }
.faq-heading .eyebrow { margin-bottom: 14px; }

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--bg);
  border-radius: var(--radius-card-sm);
  overflow: hidden;
  transition: background 0.2s;
}

.faq-item[open] { background: var(--bg-tinted); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  gap: 24px;
}

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

.faq-q {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.005em;
  line-height: 1.4;
}

.faq-chevron {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--fg-muted);
  background: var(--card);
  border-radius: 50%;
  transition: transform 0.3s var(--ease-out), background 0.2s, color 0.2s;
}

.faq-item[open] .faq-chevron {
  transform: rotate(45deg);
  background: var(--blue);
  color: #fff;
}

.faq-a { padding: 0 24px 22px; animation: faq-open 0.3s var(--ease-out); }

.faq-a p {
  color: var(--fg-muted);
  line-height: 1.6;
  font-size: 0.98rem;
  max-width: 680px;
}

@keyframes faq-open {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─────────────── CTA ─────────────── */

.cta-section {
  position: relative;
  padding: 120px 0;
  text-align: center;
  text-wrap: pretty;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(180deg, var(--bg-tinted) 0%, var(--bg-tinted-warm) 100%);
}

.cta-bg { position: absolute; inset: 0; z-index: -1; overflow: hidden; }

.cta-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 700px;
  height: 700px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 149, 0, 0.15), transparent 60%);
  filter: blur(80px);
  animation: cta-pulse 8s var(--ease-soft) infinite alternate;
}

@keyframes cta-pulse {
  0%   { transform: translate(-50%, -50%) scale(0.9); opacity: 0.6; }
  100% { transform: translate(-50%, -50%) scale(1.1); opacity: 1; }
}

.cta-inner { max-width: 680px; margin: 0 auto; }

.cta-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  color: var(--fg);
}

.cta-body {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

.cta-note { margin-top: 16px; font-size: 0.85rem; color: var(--fg-dim); }

/* ─────────────── footer ─────────────── */

.site-footer {
  border-top: 1px solid var(--rule-soft);
  padding: 32px 0;
  background: var(--card);
}

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

.site-footer-brand { display: flex; align-items: baseline; gap: 14px; }

.site-footer-logo {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.site-footer-copy { font-size: 0.85rem; color: var(--fg-dim); }

.site-footer-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--fg-muted);
  transition: color 0.2s;
}

.site-footer-link:hover { color: var(--blue-strong); }

/* ─────────────── reveal animations ─────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}

.reveal--slow { transition-duration: 1s; }

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal--slow {
    opacity: 1 !important;
    transform: none !important;
    transition: none;
  }
  .hero-bg-glow, .phone-frame--hero, .watch-frame--orbit, .cta-bg-glow {
    animation: none !important;
  }
  html { scroll-behavior: auto; }
}

/* ─────────────── responsive ─────────────── */

@media (max-width: 960px) {
  .site-nav { display: none; }
  .hero { padding-top: 120px; padding-bottom: 60px; }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    min-height: 0;
  }
  .hero-visual { min-height: 520px; }
  .feature-section { padding: 70px 0; }
  .feature-split, .feature-split--reverse {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .feature-split--reverse > .feature-copy { order: 1; }
  .feature-split--reverse > .feature-visual { order: 2; }
  .feature-visual, .feature-visual--stack { min-height: 520px; }
  .features-grid, .tech-grid { grid-template-columns: 1fr; }
  .watch-row .watch-frame { width: 120px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .site-header { padding: 12px 0; }
  .site-header-cta { display: none; }
  .stats-grid {
    grid-template-columns: 1fr;
    padding: 12px 20px;
  }
  .stat {
    padding: 22px 0;
  }
  .stat:not(:last-child) {
    border-right: 0;
    border-bottom: 1px solid var(--rule-soft);
  }
  .phone-frame { width: 260px; }
  .phone-frame--hero { width: 280px; }
  .phone-frame--stack-back { width: 220px; transform: translate(-50px, -20px) rotate(-4deg); }
  .phone-frame--stack-front { width: 260px; transform: translate(30px, 20px) rotate(3deg); }
  .watch-orbit { right: 5%; bottom: -4%; }
  .watch-row { gap: 14px; }
  .watch-row .watch-frame { width: 100px; }
  .hero-title { font-size: clamp(2.1rem, 10vw, 2.8rem); }
  .cta-section, .tech-section, .faq-section, .features-section, .watch-section { padding: 80px 0; }
}