/* =========================================================
   Apple Watch Ultra 3 — Landing Page
   Responsive, dark, premium aesthetic.
   ========================================================= */

:root {
  --bg: #000;
  --ink: #f5f5f7;
  --ink-dim: #a1a1a6;
  --line: rgba(255, 255, 255, 0.12);
  --grad: linear-gradient(120deg, #ffd9a8 0%, #e9c2ff 35%, #8ec8ff 70%, #a4f0ff 100%);
  --maxw: 1280px;
  --pad: clamp(1.25rem, 4vw, 4rem);
  --radius: 22px;
  --ease: cubic-bezier(.2,.65,.25,1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2.4rem, 6vw, 5.5rem); line-height: 1.05; }
h2 { font-size: clamp(1.9rem, 4.4vw, 3.6rem); line-height: 1.08; }
h3 { font-size: 1.25rem; }

p { line-height: 1.55; margin: 0; color: var(--ink-dim); }
.lead { font-size: clamp(1rem, 1.4vw, 1.2rem); color: var(--ink); opacity: 0.85; max-width: 60ch; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  color: var(--ink-dim);
  margin-bottom: 1rem;
}

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(0, 0, 0, 0.55);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.85rem var(--pad);
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav__logo {
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.3s var(--ease);
}
.nav__logo:hover { opacity: 0.85; }
.nav__logo svg { width: 22px; height: 22px; display: block; }
.nav__wordmark {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.nav__wordmark b {
  font-weight: 600;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-left: 1px;
}
.nav__links {
  display: flex;
  gap: 1.75rem;
  margin-left: 0.5rem;
  flex: 1;
}
.nav__links a {
  font-size: 0.86rem;
  color: var(--ink-dim);
  transition: color 0.3s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__cta {
  font-size: 0.86rem;
  padding: 0.5rem 1rem;
  background: var(--ink);
  color: #000;
  border-radius: 999px;
  font-weight: 500;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav__cta:hover { transform: translateY(-1px); opacity: 0.9; }

@media (max-width: 720px) {
  .nav__links { display: none; }
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.6rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--ink);
  color: #000;
}
.btn--primary:hover { transform: translateY(-2px); }
.btn--ghost {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.08); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute; inset: 0;
  background-image: url("WatchBackgroundWide.png");
  background-size: cover;
  background-position: center;
  z-index: -2;
  transform: scale(1.02);
  animation: floatBG 18s ease-in-out infinite alternate;
}
.hero__overlay {
  position: absolute; inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 60% at 50% 20%, rgba(0,0,0,0) 0%, rgba(0,0,0,0.55) 60%, rgba(0,0,0,0.85) 100%),
    linear-gradient(180deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0) 30%, rgba(0,0,0,0) 70%, rgba(0,0,0,0.85) 100%);
}

@keyframes floatBG {
  0%   { transform: scale(1.02) translateY(0); }
  100% { transform: scale(1.06) translateY(-1.5%); }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  padding: 8rem var(--pad) 4rem;
}
.hero__title {
  max-width: 18ch;
  margin-bottom: 1.4rem;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}
.hero__sub {
  max-width: 52ch;
  color: var(--ink);
  opacity: 0.82;
  font-size: clamp(1rem, 1.25vw, 1.15rem);
  margin-bottom: 2.2rem;
}
.hero__ctas { display: flex; gap: 0.85rem; flex-wrap: wrap; }

.hero__scroll {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--ink-dim);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.hero__scroll span {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, transparent, var(--ink) 70%, transparent);
  margin: 0 auto 0.5rem;
  animation: scrollPulse 2.2s var(--ease) infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: translateY(0); }
  50%      { opacity: 1;   transform: translateY(6px); }
}

/* Mobile background swap */
@media (max-width: 768px) {
  .hero__bg {
    background-image: url("WatchBackgroundLong.png");
    background-position: center top;
  }
  .hero__content { padding-top: 7rem; padding-bottom: 6rem; }
  .hero__title { max-width: 14ch; }
}

/* ---------- MARQUEE ---------- */
.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.25rem 0;
  overflow: hidden;
  background: #050505;
}
.marquee__track {
  display: flex;
  gap: 2rem;
  white-space: nowrap;
  animation: scroll 40s linear infinite;
  font-size: 0.95rem;
  color: var(--ink-dim);
  letter-spacing: 0.02em;
}
.marquee__track span {
  flex: 0 0 auto;
}
@keyframes scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ---------- EXPLODED VIDEO SECTION (9:16 vertical) ---------- */
.exploded {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 8rem) var(--pad);
  display: grid;
  grid-template-columns: 1fr minmax(280px, 360px);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  justify-items: center;
}
.exploded__copy { justify-self: stretch; }
.exploded__copy h2 { margin-bottom: 1.2rem; }
.exploded__copy p { margin-top: 0.5rem; }

.exploded__video-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 9 / 16;
  width: 100%;
  max-width: 360px;
  background: #0a0a0a;
  isolation: isolate;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.8);
}
.exploded__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
}
.exploded__glow {
  position: absolute; inset: -1px;
  border-radius: var(--radius);
  pointer-events: none;
  background: radial-gradient(60% 80% at 50% 50%, transparent 55%, rgba(0,0,0,0.55) 100%);
  z-index: 1;
}
.exploded__video-wrap::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius) + 2px);
  background: var(--grad);
  z-index: -1;
  opacity: 0.35;
  filter: blur(22px);
}

@media (max-width: 880px) {
  .exploded {
    grid-template-columns: 1fr;
    text-align: left;
    justify-items: stretch;
  }
  .exploded__video-wrap {
    margin: 0 auto;
    max-width: 320px;
  }
}

/* ---------- FEATURES GRID ---------- */
.features {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 7rem) var(--pad);
}
.features__header {
  text-align: center;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}
.features__header h2 { max-width: 20ch; margin: 0 auto; }
.features__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}
.feature {
  grid-column: span 2;
  background: linear-gradient(180deg, #0d0d10, #050507);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), background 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.feature::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  background: radial-gradient(400px 200px at var(--mx, 50%) var(--my, 0%), rgba(255,255,255,0.07), transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.feature:hover::after { opacity: 1; }
.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}
.feature--lg { grid-column: span 3; min-height: 280px; }
.feature--wide { grid-column: span 3; }
.feature__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.03));
  display: grid;
  place-items: center;
  color: #fff;
  margin-bottom: 0.4rem;
}
.feature__icon svg { width: 22px; height: 22px; }
.feature h3 { font-size: 1.15rem; }

@media (max-width: 980px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .feature, .feature--lg, .feature--wide { grid-column: span 1; }
}
@media (max-width: 540px) {
  .features__grid { grid-template-columns: 1fr; }
}

/* ---------- HEALTH ---------- */
.health {
  background: linear-gradient(180deg, #050507 0%, #0a0a10 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.health__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) var(--pad);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.health__list {
  list-style: none;
  padding: 0;
  margin: 1.6rem 0 0;
  display: grid;
  gap: 0.85rem;
}
.health__list li {
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--ink-dim);
}
.health__list strong { color: var(--ink); }

.health__viz {
  display: grid;
  place-items: center;
  position: relative;
  min-height: 360px;
}
.ring {
  --size: 200px;
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  border: 3px solid transparent;
  background:
    radial-gradient(closest-side, #050507 78%, transparent 78%),
    conic-gradient(from -90deg, #ffd9a8, #e9c2ff, #8ec8ff, #a4f0ff, #ffd9a8);
  display: grid;
  place-items: center;
  position: absolute;
  text-align: center;
  animation: spin 28s linear infinite;
}
.ring span {
  position: absolute;
  top: 40%;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.ring b {
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--ink);
  position: absolute;
  top: 50%;
  transform: translateY(0);
}
.ring--1 { --size: 280px; opacity: 0.95; }
.ring--2 { --size: 200px; opacity: 0.85; transform: translate(-90px, 60px); }
.ring--3 { --size: 160px; opacity: 0.85; transform: translate(100px, -50px); }

@keyframes spin {
  to { transform: rotate(360deg); }
}
.ring--2 { animation: spin2 22s linear infinite; }
.ring--3 { animation: spin3 18s linear infinite reverse; }
@keyframes spin2 { from { transform: translate(-90px, 60px) rotate(0); } to { transform: translate(-90px, 60px) rotate(360deg); } }
@keyframes spin3 { from { transform: translate(100px, -50px) rotate(0); } to { transform: translate(100px, -50px) rotate(-360deg); } }

@media (max-width: 880px) {
  .health__inner { grid-template-columns: 1fr; }
  .health__viz { min-height: 320px; margin-top: 1rem; }
  .ring--1 { --size: 220px; }
  .ring--2 { --size: 160px; transform: translate(-70px, 50px); }
  .ring--3 { --size: 130px; transform: translate(80px, -40px); }
  @keyframes spin2 { from { transform: translate(-70px, 50px) rotate(0); } to { transform: translate(-70px, 50px) rotate(360deg); } }
  @keyframes spin3 { from { transform: translate(80px, -40px) rotate(0); } to { transform: translate(80px, -40px) rotate(-360deg); } }
}

/* ---------- SPECS ---------- */
.specs {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) var(--pad);
}
.specs__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: clamp(2rem, 5vw, 3rem);
}
.spec {
  padding: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #0a0a0d 0%, #050507 100%);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
.spec:hover { transform: translateY(-3px); border-color: rgba(255,255,255,0.2); }
.spec span {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.spec b { font-size: 1rem; font-weight: 500; color: var(--ink); }

@media (max-width: 880px) { .specs__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .specs__grid { grid-template-columns: 1fr; } }

/* ---------- FINAL CTA ---------- */
.cta {
  position: relative;
  padding: clamp(5rem, 12vw, 9rem) var(--pad);
  text-align: center;
  background:
    radial-gradient(60% 80% at 50% 50%, rgba(142, 200, 255, 0.18), transparent 70%),
    radial-gradient(50% 60% at 80% 20%, rgba(233, 194, 255, 0.15), transparent 70%),
    #000;
  border-top: 1px solid var(--line);
}
.cta__inner {
  max-width: 60ch;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}
.cta__inner .hero__ctas { justify-content: center; }

/* ---------- FOOT ---------- */
.foot {
  border-top: 1px solid var(--line);
  padding: 2rem var(--pad);
  text-align: center;
  font-size: 0.75rem;
  color: var(--ink-dim);
  display: grid;
  gap: 0.4rem;
}

/* ---------- REVEAL / SCROLL ANIM ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .hero__bg { animation: none; }
}