/* ============================================================
   GlassDisk — styles.css
   Apple-inspired dark glass landing page
   ============================================================ */

:root {
  --bg: #000005;
  --bg-soft: #0a0a12;
  --text: #f5f5f7;
  --text-dim: #a1a1aa;
  --text-faint: #6e6e76;
  --accent: #64d2ff;
  --accent-2: #5e5ce6;
  --accent-3: #bf5af2;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-highlight: rgba(255, 255, 255, 0.16);
  --radius: 22px;
  --radius-sm: 14px;
  --maxw: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ============================================================
   Background aurora
   ============================================================ */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(1200px 800px at 50% -10%, #10131f 0%, transparent 60%),
    var(--bg);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  will-change: transform;
}

.orb-1 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--accent-2), transparent 70%);
  top: -120px;
  left: -80px;
  animation: float1 18s var(--ease) infinite alternate;
}

.orb-2 {
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  top: 20%;
  right: -120px;
  animation: float2 22s var(--ease) infinite alternate;
}

.orb-3 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--accent-3), transparent 70%);
  bottom: -100px;
  left: 30%;
  opacity: 0.35;
  animation: float3 26s var(--ease) infinite alternate;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
}

@keyframes float1 {
  to { transform: translate(60px, 40px) scale(1.1); }
}
@keyframes float2 {
  to { transform: translate(-50px, 60px) scale(1.05); }
}
@keyframes float3 {
  to { transform: translate(40px, -40px) scale(1.12); }
}

/* ============================================================
   Glass utility
   ============================================================ */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow:
    0 1px 0 var(--glass-highlight) inset,
    0 20px 60px rgba(0, 0, 0, 0.45);
}

/* ============================================================
   Navigation
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 14px 20px;
  transition: padding 0.4s var(--ease);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  border-radius: 100px;
  background: rgba(10, 10, 18, 0.4);
  border: 1px solid transparent;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: all 0.4s var(--ease);
}

.nav.scrolled .nav-inner {
  background: rgba(10, 10, 18, 0.6);
  border-color: var(--glass-border);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: inline-flex;
  filter: drop-shadow(0 2px 10px rgba(58, 160, 255, 0.55));
}

.brand-mark img {
  display: block;
}

.brand-name {
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.25s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 8px 16px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(94, 92, 230, 0.4);
}

.nav-cta:hover {
  filter: brightness(1.08);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), filter 0.25s var(--ease),
    background 0.25s var(--ease), box-shadow 0.25s var(--ease);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 10px 30px rgba(94, 92, 230, 0.45);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(94, 92, 230, 0.55);
}

.btn-secondary {
  background: var(--glass-bg);
  border-color: var(--glass-border);
  color: var(--text);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 20px 80px;
  text-align: center;
}

.hero-inner {
  max-width: 860px;
}

.hero-logo {
  width: clamp(96px, 18vw, 132px);
  margin: 0 auto 28px;
  filter: drop-shadow(0 0 28px rgba(58, 160, 255, 0.55))
    drop-shadow(0 0 60px rgba(47, 107, 255, 0.35));
  animation: logoBreath 6s var(--ease) infinite alternate;
}

.hero-logo img {
  width: 100%;
  height: auto;
}

@keyframes logoBreath {
  from { transform: translateY(0) scale(1); opacity: 0.95; }
  to { transform: translateY(-6px) scale(1.03); opacity: 1; }
}

.eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(100, 210, 255, 0.1);
  border: 1px solid rgba(100, 210, 255, 0.2);
}

.hero-title {
  font-size: clamp(2.6rem, 8vw, 5.4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.02;
  background: linear-gradient(180deg, #ffffff 0%, #c7c7d1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 22px;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 14px;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.18rem);
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 36px;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

/* ============================================================
   Hero product visual — the GlassDisk library
   ============================================================ */
.hero-stage {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
}

.hero-glow {
  position: absolute;
  inset: -12% -6% -20%;
  z-index: -1;
  background:
    radial-gradient(60% 60% at 50% 30%, rgba(58, 160, 255, 0.35), transparent 70%);
  filter: blur(40px);
}

.library-window {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow:
    0 1px 0 var(--glass-highlight) inset,
    0 40px 110px rgba(0, 0, 0, 0.7);
  transform: perspective(1600px) rotateX(4deg);
  transition: transform 0.6s var(--ease);
}

.hero-stage:hover .library-window {
  transform: perspective(1600px) rotateX(0deg);
}

.library-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 320px;
}

.library-rail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 14px;
  background: rgba(0, 0, 0, 0.25);
  border-right: 1px solid var(--glass-border);
  text-align: left;
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 4px 10px 12px;
}

.rail-item {
  font-size: 0.92rem;
  color: var(--text-dim);
  padding: 9px 12px;
  border-radius: 10px;
}

.rail-item.active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(100, 210, 255, 0.18), rgba(94, 92, 230, 0.14));
  border: 1px solid var(--glass-border);
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 22px;
  align-content: start;
}

.tile {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 2px;
  aspect-ratio: 1 / 1.08;
  padding: 14px;
  border-radius: var(--radius-sm);
  background:
    radial-gradient(120% 120% at 50% 0%, rgba(26, 32, 48, 0.9) 0%, rgba(10, 13, 22, 0.9) 70%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: left;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.tile::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 14px;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px rgba(58, 160, 255, 0.4);
  opacity: 0.92;
}

.tile-dos::before { background: linear-gradient(135deg, #b0b4c0, #5e6270); }
.tile-game::before { background: linear-gradient(135deg, #bf5af2, #5e5ce6); }
.tile-office::before { background: linear-gradient(135deg, #ff9f0a, #ff375f); }
.tile-paint::before { background: linear-gradient(135deg, #64d2ff, #28c840); }
.tile-arcade::before { background: linear-gradient(135deg, #ff375f, #ff9f0a); }
.tile-strategy::before { background: linear-gradient(135deg, #5e5ce6, #64d2ff); }
.tile-utils::before { background: linear-gradient(135deg, #8e8e93, #c7c7d1); }

.tile b {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.tile i {
  font-size: 0.68rem;
  font-style: normal;
  color: var(--text-faint);
}

.tile:hover {
  transform: translateY(-4px);
  border-color: var(--glass-highlight);
}
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--glass-border);
  position: relative;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.window-title {
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-faint);
  pointer-events: none;
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 100px 20px;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 16px;
  background: linear-gradient(180deg, #ffffff 0%, #c7c7d1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-dim);
}

/* ============================================================
   Features
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  border-radius: var(--radius);
  padding: 30px;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-highlight);
}

.feature-card-wide {
  grid-column: 1 / -1;
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(100, 210, 255, 0.16), rgba(94, 92, 230, 0.12));
  border: 1px solid var(--glass-border);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-dim);
  font-size: 0.98rem;
}

/* ============================================================
   Why GlassDisk exists
   ============================================================ */
.why {
  display: flex;
  justify-content: center;
}

.why-inner {
  max-width: 760px;
  text-align: center;
}

.why .eyebrow {
  margin-bottom: 22px;
}

.why-title {
  font-size: clamp(1.8rem, 4.4vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 28px;
  background: linear-gradient(180deg, #ffffff 0%, #c7c7d1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.why-body {
  max-width: 620px;
  margin: 0 auto;
}

.why-body p {
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  color: var(--text-dim);
  margin-bottom: 18px;
}

.why-body p:last-child {
  margin-bottom: 0;
  color: var(--text);
}

/* ============================================================
   Roadmap tiers
   ============================================================ */
.roadmap-tiers {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.tier-head {
  margin-bottom: 16px;
}

.tier-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: 100px;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
}

.tier-label-now {
  color: #28c840;
  background: rgba(40, 200, 64, 0.12);
  border-color: rgba(40, 200, 64, 0.3);
}

.tier-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.platform-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px 24px;
  border-radius: var(--radius-sm);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}

.platform-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-highlight);
}

.platform-name {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.platform-note {
  font-size: 0.95rem;
  color: var(--text-dim);
}

.platform-live {
  border-color: rgba(40, 200, 64, 0.3);
  box-shadow:
    0 1px 0 var(--glass-highlight) inset,
    0 20px 60px rgba(40, 200, 64, 0.12);
}

/* ============================================================
   Signup
   ============================================================ */
.signup {
  display: flex;
  justify-content: center;
}

.signup-logo {
  width: 56px;
  margin: 0 auto 18px;
  filter: drop-shadow(0 0 18px rgba(58, 160, 255, 0.5));
}

.signup-logo img {
  width: 100%;
  height: auto;
}

.signup-card {
  width: 100%;
  max-width: 620px;
  text-align: center;
  padding: 48px 36px;
  border-radius: var(--radius);
}

.signup-form {
  margin-top: 28px;
}

.field {
  display: flex;
  gap: 10px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  padding: 6px 6px 6px 8px;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.field:focus-within {
  border-color: rgba(100, 210, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(100, 210, 255, 0.12);
}

.field input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font);
  padding: 10px 16px;
  min-width: 0;
}

.field input::placeholder {
  color: var(--text-faint);
}

.field .btn {
  padding: 12px 22px;
}

.form-note {
  margin-top: 16px;
  font-size: 0.88rem;
  color: var(--text-faint);
  min-height: 1.2em;
  transition: color 0.3s var(--ease);
}

.form-note.success {
  color: #28c840;
}

.form-note.error {
  color: #ff5f57;
}

.signup-counter {
  margin-top: 22px;
  font-size: 0.95rem;
  color: var(--text-faint);
}

.signup-counter[hidden] {
  display: none;
}

.signup-counter-value {
  font-weight: 600;
  color: var(--text);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 50px 20px;
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
}

.brand-footer {
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.footer-tagline {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.footer-copy {
  color: var(--text-faint);
  font-size: 0.85rem;
}

.footer-credit {
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-top: 6px;
}

.footer-credit-link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.footer-credit-link:hover {
  color: var(--text);
}

.footer-credit-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ============================================================
   Scroll reveal
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  will-change: opacity, transform;
}

.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 720px) {
  .nav-links a:not(.nav-cta) {
    display: none;
  }

  .section {
    padding: 70px 18px;
  }

  .hero {
    padding: 120px 18px 60px;
  }

  .field {
    flex-direction: column;
    border-radius: var(--radius-sm);
    padding: 10px;
  }

  .field .btn {
    width: 100%;
  }

  .library-body {
    grid-template-columns: 1fr;
  }

  .library-rail {
    display: none;
  }

  .library-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 16px;
  }

  .library-window {
    transform: none;
  }

  .platform-card:hover {
    transform: none;
  }
}

@media (max-width: 420px) {
  .hero-actions .btn {
    width: 100%;
  }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}