@import url("./tokens.css");

/* home_ui_v3 — cinematic shell */

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--ice);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Aurora mesh backdrop */
.mesh {
  position: fixed;
  inset: -20vmax;
  z-index: -3;
  pointer-events: none;
  background:
    radial-gradient(38vmax 30vmax at 18% 12%, rgba(20, 194, 122, 0.20), transparent 62%),
    radial-gradient(34vmax 28vmax at 82% 8%, rgba(33, 184, 212, 0.18), transparent 60%),
    radial-gradient(40vmax 32vmax at 72% 78%, rgba(123, 108, 246, 0.14), transparent 62%),
    radial-gradient(30vmax 26vmax at 12% 82%, rgba(155, 225, 93, 0.16), transparent 58%);
  filter: blur(28px) saturate(118%);
  animation: meshDrift 26s var(--ease) infinite alternate;
}

.mesh::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(244, 248, 249, 0.35), rgba(244, 248, 249, 0.72));
}

@keyframes meshDrift {
  0%   { transform: translate3d(-2%, -1%, 0) scale(1); }
  50%  { transform: translate3d(2%, 1.5%, 0) scale(1.06); }
  100% { transform: translate3d(-1%, 2%, 0) scale(1.02); }
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: 0.5;
  background-image: radial-gradient(rgba(13, 26, 23, 0.05) 0.5px, transparent 0.5px);
  background-size: 3px 3px;
}

/* Layout */
.wrap {
  width: min(76rem, calc(100% - 3rem));
  margin: 0 auto;
}

.section { padding: 6rem 0; }

.section-head {
  max-width: 44rem;
  margin: 0 0 2.75rem;
}

.section-head h2 {
  margin: 0.65rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.04rem;
}

.overline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.8rem 0.3rem 0.55rem;
  border-radius: 999px;
  background: var(--glass-strong);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift-1);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--spring-deep);
  backdrop-filter: blur(10px);
}

.overline i {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--spring);
  box-shadow: 0 0 0 3px rgba(20, 194, 122, 0.18);
  animation: beat 2s ease-in-out infinite;
}

@keyframes beat {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

/* Floating glass nav */
.nav {
  position: fixed;
  top: 0.9rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  width: min(76rem, calc(100% - 1.5rem));
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.55rem 0.6rem 0.55rem 1rem;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift-1);
  backdrop-filter: blur(18px) saturate(140%);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav.scrolled {
  background: var(--glass-strong);
  box-shadow: var(--lift-2);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.nav-brand .mark {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 0.55rem;
  display: grid;
  place-items: center;
  color: #eafff4;
  background: linear-gradient(145deg, var(--spring), var(--spring-deep));
  box-shadow: 0 4px 14px rgba(20, 194, 122, 0.35);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: auto;
}

.nav-links a {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  font-size: 0.86rem;
  color: var(--ink-soft);
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
}

.nav-cta { margin-left: 0.35rem; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle span {
  position: relative;
  display: block;
  width: 1rem;
  height: 1.5px;
  background: currentColor;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 100%;
  background: currentColor;
  transition: transform 0.25s var(--ease);
}

.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.83rem; }

.btn-primary {
  color: #04140d;
  background: linear-gradient(135deg, var(--lime), var(--spring) 55%, var(--aqua));
  box-shadow: 0 10px 26px rgba(20, 194, 122, 0.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(20, 194, 122, 0.4);
}

.btn-glass {
  background: var(--glass-strong);
  border-color: var(--glass-line);
  color: var(--ink);
  box-shadow: var(--lift-1);
  backdrop-filter: blur(10px);
}

.btn-glass:hover {
  transform: translateY(-2px);
  box-shadow: var(--lift-2);
}

.btn-quiet {
  padding: 0;
  border-radius: 0;
  color: var(--spring-deep);
  border-bottom: 1.5px solid rgba(20, 194, 122, 0.45);
}

.btn-quiet:hover { color: var(--ink); border-color: var(--ink); }

/* Glass card + cursor spotlight */
.glass {
  position: relative;
  border-radius: 1.15rem;
  background: var(--glass-strong);
  border: 1px solid var(--glass-line);
  box-shadow: var(--lift-1);
  backdrop-filter: blur(16px) saturate(130%);
  overflow: hidden;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
  transform-style: preserve-3d;
}

.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  background: radial-gradient(22rem 22rem at var(--mx) var(--my), rgba(20, 194, 122, 0.16), transparent 62%);
  transition: opacity 0.35s var(--ease);
}

.glass:hover::before,
.glass:focus-within::before { opacity: 1; }

.glass:hover { box-shadow: var(--halo); }

/* Footer */
.site-foot {
  position: relative;
  padding: 3rem 0 2.5rem;
  border-top: 1px solid var(--line);
}

.foot-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

.foot-grid strong { color: var(--ink); }

.foot-grid nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

.foot-grid a:hover { color: var(--spring-deep); }

.editions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.5rem;
}

.editions span,
.editions a {
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.editions span {
  color: var(--spring-deep);
  border-color: rgba(20, 194, 122, 0.4);
  background: rgba(20, 194, 122, 0.08);
}

.editions a:hover { color: var(--ink); border-color: var(--ink); }

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

@media (max-width: 900px) {
  .section { padding: 4rem 0; }
  .wrap { width: calc(100% - 2rem); }

  .nav { padding-right: 0.5rem; }
  .nav-toggle { display: grid; }

  .nav-links {
    position: absolute;
    top: calc(100% + 0.6rem);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    margin: 0;
    padding: 0.6rem;
    border-radius: 1.1rem;
    background: var(--glass-strong);
    border: 1px solid var(--glass-line);
    box-shadow: var(--lift-2);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
  }

  .nav-links a { padding: 0.7rem 0.9rem; }

  body.nav-open .nav-links {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  body.nav-open .nav-toggle span { background: transparent; }
  body.nav-open .nav-toggle span::before { transform: translateY(5px) rotate(45deg); }
  body.nav-open .nav-toggle span::after { transform: translateY(-5px) rotate(-45deg); }

  .nav .nav-cta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mesh { animation: none; }
  .overline i { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .glass:hover { transform: none; }
}