:root {
  --bg: #0b0b0c;
  --surface: #141416;
  --cream: #f3efe5;
  --gold: #c79a3c;
  --muted: rgba(243,239,229,0.5);
  --line: rgba(243,239,229,0.12);
  --frame: #111111;
  --lens: #774dff;
}

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

body {
  background: var(--bg);
  color: var(--cream);
  font-family: 'Manrope', Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* HEADER */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  border-bottom: 1px solid var(--line);
}
.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cream);
  text-decoration: none;
}
.launch-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: 999px;
  padding: 6px 14px;
}

/* MAIN */
main {
  flex: 1;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: 64px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

/* INTRO */
.intro { text-align: center; }
.eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 18px;
}
.intro h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(40px, 8vw, 68px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 14px;
}
.subhead { color: var(--muted); font-size: 15px; }

/* PRODUCT */
.product { display: flex; flex-direction: column; gap: 40px; }

.glasses-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 0;
}
.halo {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--lens) 0%, transparent 65%);
  opacity: 0.28;
  filter: blur(28px);
  transition: background .35s ease;
}
.glasses {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.lens {
  width: 92px;
  height: 62px;
  border: 3px solid var(--frame);
  border-radius: 14px;
  background: var(--lens);
  transition: background .3s ease, border-color .3s ease;
}
.bridge {
  width: 26px;
  height: 3px;
  background: var(--frame);
  transition: background .3s ease;
}
.arm {
  width: 34px;
  height: 3px;
  background: var(--frame);
  transition: background .3s ease;
}
.arm-left { transform: translateX(3px) rotate(-14deg); transform-origin: right center; }
.arm-right { transform: translateX(-3px) rotate(14deg); transform-origin: left center; }

/* CONTROLS */
.color-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.control-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 14px;
}
.swatches { display: flex; gap: 10px; }
.swatch {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color);
  border: 2px solid var(--line);
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease;
}
.swatch:hover { transform: scale(1.08); }
.swatch.active { border-color: var(--gold); }

/* ACCESS */
.access {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 28px;
}
.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 4px;
}
.tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--muted);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all .2s ease;
}
.tab.active { background: rgba(243,239,229,0.08); color: var(--cream); }

.panel { display: none; }
.panel.active { display: block; }

.panel label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.input-row { display: flex; gap: 10px; }
.input-row input {
  flex: 1;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 13px 14px;
  color: var(--cream);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color .2s ease;
}
.input-row input:focus { border-color: var(--gold); }
.input-row input::placeholder { color: rgba(243,239,229,0.3); }

.submit {
  background: var(--gold);
  color: #0b0b0c;
  border: none;
  border-radius: 6px;
  padding: 13px 26px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity .2s ease;
}
.submit:hover { opacity: 0.85; }
.submit:disabled { opacity: 0.4; cursor: default; }

.message {
  margin-top: 14px;
  font-size: 13px;
  min-height: 18px;
}
.message.ok { color: #4ade80; }
.message.err { color: #f87171; }

/* FOOTER */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

/* RESPONSIVE */
@media (max-width: 560px) {
  header, footer { padding: 20px; }
  main { padding: 48px 20px 64px; gap: 44px; }
  .color-controls { grid-template-columns: 1fr; gap: 24px; }
  .halo { width: 240px; height: 240px; }
  .lens { width: 78px; height: 54px; }
  .input-row { flex-direction: column; }
  .submit { width: 100%; }
}