:root {
  --paper: #f2f0eb;
  --paper-strong: #ebe7de;
  --ink: #0f141b;
  --ink-soft: #36404d;
  --accent: #1d4f72;
  --accent-soft: #6991ad;
  --line: rgba(15, 20, 27, 0.12);
  --glass: rgba(255, 255, 255, 0.56);
  --radius: 20px;
  --radius-sm: 12px;
  --shadow-lg: 0 22px 50px rgba(16, 22, 32, 0.12);
  --shadow-md: 0 14px 30px rgba(16, 22, 32, 0.08);
  --max-width: 1180px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 10%, rgba(105, 145, 173, 0.2), transparent 36%),
    radial-gradient(circle at 84% 88%, rgba(24, 42, 65, 0.14), transparent 28%),
    linear-gradient(180deg, #f7f6f1 0%, var(--paper) 44%, #efebe3 100%);
  font-family: "Sora", "Avenir Next", "Segoe UI", sans-serif;
  line-height: 1.55;
  min-height: 100vh;
}

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

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

p {
  margin: 0;
  color: var(--ink-soft);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.1;
  font-family: "Fraunces", "Times New Roman", serif;
  letter-spacing: -0.02em;
}

main {
  padding-top: var(--header-height);
}

.container {
  width: min(var(--max-width), calc(100% - 2.3rem));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 30;
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}

.site-header.scrolled {
  background: rgba(247, 245, 240, 0.74);
  backdrop-filter: blur(16px);
  border-color: var(--line);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(130deg, var(--accent-soft), var(--accent));
  box-shadow: 0 0 0 8px rgba(29, 79, 114, 0.16);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav-links a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(15, 20, 27, 0.7);
  transition: color 200ms ease;
}

.nav-links a.current,
.nav-links a:hover {
  color: var(--ink);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 10px;
  color: var(--ink);
  font-size: 0.9rem;
  padding: 0.35rem 0.58rem;
}

.btn,
.btn-outline {
  border-radius: 999px;
  padding: 0.8rem 1.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: transform 220ms ease, box-shadow 220ms ease, background 220ms ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.42rem;
}

.btn {
  color: #f2f5f8;
  background: linear-gradient(135deg, #1e5d89 0%, #1f3f63 100%);
  box-shadow: 0 10px 24px rgba(31, 63, 99, 0.26);
}

.btn-outline {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
}

.btn:hover,
.btn-outline:hover {
  transform: translateY(-2px);
}

.page-hero {
  padding: clamp(3rem, 6vw, 5.3rem) 0 clamp(3.5rem, 7vw, 6.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: center;
}

.overline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.72rem;
  border-radius: 999px;
  font-size: 0.68rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: #233a54;
  background: rgba(29, 79, 114, 0.12);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.2rem, 4.6vw, 4.8rem);
  margin-bottom: 1.1rem;
}

.hero-copy {
  max-width: 62ch;
  margin-bottom: 1.6rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.hero-stats {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem;
  background: rgba(255, 255, 255, 0.5);
}

.stat strong {
  display: block;
  font-size: 1.3rem;
  font-family: "Fraunces", serif;
  margin-bottom: 0.2rem;
}

.glass-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.24));
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.scene-shell {
  aspect-ratio: 1 / 1;
  min-height: 340px;
}

.webgl-canvas {
  width: 100%;
  height: 100%;
}

.section {
  padding: clamp(3.1rem, 6vw, 6rem) 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.4vw, 3rem);
}

.section-note {
  max-width: 56ch;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-md);
  padding: 1.2rem;
}

.panel h3 {
  margin-bottom: 0.52rem;
  font-size: 1.22rem;
}

.kicker {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: rgba(15, 20, 27, 0.58);
  margin-bottom: 0.45rem;
}

.stacked {
  display: grid;
  gap: 0.9rem;
}

.timeline {
  display: grid;
  gap: 0.9rem;
}

.timeline-item {
  border-left: 2px solid rgba(31, 63, 99, 0.35);
  padding-left: 0.95rem;
}

.timeline-item strong {
  font-size: 1.01rem;
  display: block;
  margin-bottom: 0.28rem;
  font-family: "Fraunces", serif;
}

.split-layout {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 1rem;
}

.tier {
  position: relative;
}

.tier[data-highlight="true"] {
  border-color: rgba(31, 63, 99, 0.34);
}

.tier-price {
  font-size: 2.2rem;
  font-family: "Fraunces", serif;
  margin: 0.4rem 0;
}

.tier ul,
.checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.38rem;
}

.tier li,
.checklist li {
  position: relative;
  padding-left: 1rem;
  color: var(--ink-soft);
  font-size: 0.96rem;
}

.tier li::before,
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 999px;
  background: linear-gradient(140deg, #5f8cae, #1e5d89);
}

.form-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-md);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.form-field {
  display: grid;
  gap: 0.4rem;
}

.form-field.full {
  grid-column: 1 / -1;
}

label {
  font-size: 0.74rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: rgba(15, 20, 27, 0.72);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(250, 250, 247, 0.8);
  border-radius: 10px;
  color: var(--ink);
  padding: 0.72rem 0.82rem;
  font-family: "Sora", sans-serif;
  font-size: 0.93rem;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(31, 63, 99, 0.27);
  outline-offset: 1px;
}

.form-feedback {
  margin-top: 0.78rem;
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: #24537d;
}

.cta-band {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.84), rgba(214, 226, 236, 0.55));
}

.footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 2rem;
  font-size: 0.84rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.footer-links {
  display: inline-flex;
  gap: 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms cubic-bezier(0.2, 0.65, 0.35, 1), transform 700ms cubic-bezier(0.2, 0.65, 0.35, 1);
}

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

.badge {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.24rem 0.58rem;
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: rgba(15, 20, 27, 0.64);
}

.error-shell {
  min-height: calc(100vh - var(--header-height));
  padding: 2rem 0 4rem;
  display: grid;
  place-items: center;
}

.error-wrap {
  width: min(960px, calc(100% - 2.2rem));
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.error-code {
  font-size: clamp(4.6rem, 13vw, 9rem);
  line-height: 0.9;
  color: #1a2532;
  margin-bottom: 0.9rem;
}

.error-hint {
  margin-top: 1.2rem;
  font-size: 0.78rem;
  opacity: 0.58;
}

.game-panel {
  opacity: 0;
  transform: translateY(20px) scale(0.98);
  pointer-events: none;
  transition: opacity 360ms ease, transform 360ms ease;
}

.game-panel.unlocked {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.game-canvas {
  width: 100%;
  height: 320px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: radial-gradient(circle at center, #eff4f7 0%, #c7d9e8 100%);
  touch-action: none;
}

.game-meta {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.control-row {
  display: none;
  margin-top: 0.8rem;
  gap: 0.6rem;
}

.control-btn {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.65rem;
  background: rgba(255, 255, 255, 0.8);
  font-family: "Sora", sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.brand-ghost {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.scene-slim {
  aspect-ratio: 16 / 9;
  min-height: 260px;
}

@media (max-width: 980px) {
  .hero-grid,
  .split-layout,
  .error-wrap {
    grid-template-columns: 1fr;
  }

  .scene-shell {
    min-height: 300px;
    order: -1;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  :root {
    --header-height: 68px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 0.4rem);
    left: 1rem;
    right: 1rem;
    display: grid;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    background: rgba(248, 246, 241, 0.95);
    box-shadow: var(--shadow-md);
    transform-origin: top;
    transform: scaleY(0.7);
    opacity: 0;
    pointer-events: none;
    transition: opacity 220ms ease, transform 220ms ease;
  }

  .nav-links.open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    padding: 0.8rem 0.95rem;
    border-bottom: 1px solid var(--line);
  }

  .nav-links a:last-child {
    border-bottom: 0;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }

  .game-canvas {
    height: 280px;
  }

  .control-row {
    display: flex;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition-duration: 10ms !important;
    scroll-behavior: auto !important;
  }
}