/* styles.css — グラス × 液体メタル × 深い闇のクールな美学 */

* { box-sizing: border-box; }
html, body, #root { margin: 0; padding: 0; height: 100%; overflow: hidden; }
body {
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", -apple-system, sans-serif;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  background: #060814;
  color: #e7e9f0;
}

/* テーマ用 CSS 変数 */
.theme-obsidian {
  --bg-0: #050610;
  --bg-1: #0a0d1f;
  --ink-100: #ffffff;
  --ink-90: rgba(255,255,255,0.92);
  --ink-70: rgba(255,255,255,0.66);
  --ink-50: rgba(255,255,255,0.42);
  --ink-30: rgba(255,255,255,0.22);
  --line: rgba(255,255,255,0.10);
  --glass: rgba(0,0,0,0.25);
  --glass-strong: rgba(0,0,0,0.45);
  --accent-a: oklch(0.78 0.14 220);
  --accent-b: oklch(0.74 0.16 320);
  --accent-c: oklch(0.82 0.12 180);
  --metal-grad: linear-gradient(135deg, oklch(0.78 0.12 250), oklch(0.92 0.10 200), oklch(0.65 0.16 290), oklch(0.82 0.14 210));
}
.theme-porcelain {
  --bg-0: #f3f1ec;
  --bg-1: #e8e4dc;
  --ink-100: #14161e;
  --ink-90: rgba(20,22,30,0.92);
  --ink-70: rgba(20,22,30,0.62);
  --ink-50: rgba(20,22,30,0.42);
  --ink-30: rgba(20,22,30,0.22);
  --line: rgba(20,22,30,0.10);
  --glass: rgba(255,255,255,0.55);
  --glass-strong: rgba(255,255,255,0.75);
  --accent-a: oklch(0.55 0.14 240);
  --accent-b: oklch(0.58 0.16 30);
  --accent-c: oklch(0.50 0.12 160);
  --metal-grad: linear-gradient(135deg, oklch(0.85 0.04 220), oklch(0.92 0.02 60), oklch(0.78 0.06 320), oklch(0.88 0.04 180));
}
.theme-hologram {
  --bg-0: #0a0518;
  --bg-1: #1a0a30;
  --ink-100: #ffffff;
  --ink-90: rgba(255,255,255,0.94);
  --ink-70: rgba(255,255,255,0.70);
  --ink-50: rgba(255,255,255,0.46);
  --ink-30: rgba(255,255,255,0.24);
  --line: rgba(255,255,255,0.14);
  --glass: rgba(0,0,0,0.30);
  --glass-strong: rgba(0,0,0,0.50);
  --accent-a: oklch(0.78 0.22 320);
  --accent-b: oklch(0.78 0.22 200);
  --accent-c: oklch(0.82 0.20 100);
  --metal-grad: linear-gradient(135deg, oklch(0.65 0.24 320), oklch(0.80 0.24 200), oklch(0.85 0.22 100), oklch(0.65 0.24 280));
}

.app {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: radial-gradient(ellipse 100% 80% at 50% 0%, var(--bg-1) 0%, var(--bg-0) 100%);
  color: var(--ink-90);
  overflow: hidden;
  isolation: isolate;
}

/* === 背景の液体メタル === */
.bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}
.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  mix-blend-mode: screen;
  animation: blobFloat 24s ease-in-out infinite;
}
.theme-porcelain .bg-blob { mix-blend-mode: multiply; opacity: 0.35; }
.bg-blob-1 {
  width: 60vw; height: 60vw;
  left: -15vw; top: -15vw;
  background: var(--metal-grad);
}
.bg-blob-2 {
  width: 50vw; height: 50vw;
  right: -10vw; top: 30vh;
  background: var(--metal-grad);
  animation-delay: -8s;
  animation-duration: 32s;
}
.bg-blob-3 {
  width: 45vw; height: 45vw;
  left: 30vw; bottom: -20vw;
  background: var(--metal-grad);
  animation-delay: -16s;
  animation-duration: 28s;
}
@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1) rotate(0deg); }
  33% { transform: translate(8vw, -6vh) scale(1.15) rotate(120deg); }
  66% { transform: translate(-6vw, 8vh) scale(0.9) rotate(240deg); }
}
.bg-grain {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
  opacity: 0.5;
  pointer-events: none;
}

/* === ヘッダー === */
.app-header {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  background: linear-gradient(180deg, rgba(0,0,0,0.25), transparent);
}
.theme-porcelain .app-header { background: linear-gradient(180deg, rgba(255,255,255,0.4), transparent); }
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--ink-90);
  text-transform: uppercase;
}
.logo-mark {
  display: inline-block;
  font-size: 14px;
  background: var(--metal-grad);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  animation: spin 18s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.header-stage {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-50);
  padding: 6px 12px;
  border: 0.5px solid var(--line);
  border-radius: 100px;
  background: var(--glass);
  backdrop-filter: blur(10px);
}

.app-main {
  position: relative;
  z-index: 5;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 20px;
}

/* === Intro === */
.intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 720px;
  gap: 24px;
}
.intro-orb {
  position: relative;
  width: 220px; height: 220px;
  margin-bottom: 8px;
}
.intro-orb-core {
  position: absolute; inset: 30%;
  border-radius: 50%;
  background: var(--metal-grad);
  filter: blur(2px);
  animation: orbPulse 4s ease-in-out infinite;
  box-shadow: 0 0 80px var(--accent-a), 0 0 160px var(--accent-b);
}
.intro-orb-shine {
  position: absolute;
  left: 32%; top: 28%;
  width: 18%; height: 14%;
  border-radius: 50%;
  background: rgba(255,255,255,0.7);
  filter: blur(4px);
}
.intro-orb-ring {
  position: absolute;
  border-radius: 50%;
  border: 0.5px solid var(--ink-30);
  inset: 0;
  animation: orbRing 8s linear infinite;
}
.intro-orb-ring-1 { inset: 0; }
.intro-orb-ring-2 { inset: 12%; animation-duration: 12s; animation-direction: reverse; }
.intro-orb-ring-3 { inset: 22%; animation-duration: 6s; opacity: 0.5; }
@keyframes orbPulse {
  0%,100% { transform: scale(1); filter: blur(2px); }
  50% { transform: scale(1.1); filter: blur(4px); }
}
@keyframes orbRing {
  to { transform: rotate(360deg); }
}
.intro-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-50);
}
.intro-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink-100);
}
.intro-title em {
  font-style: normal;
  font-weight: 500;
  background: var(--metal-grad);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: shimmer 6s linear infinite;
}
@keyframes shimmer {
  to { background-position: 200% 0; }
}
.intro-sub {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0;
}
.intro-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 36px;
  border: none;
  border-radius: 100px;
  background: transparent;
  color: var(--ink-100);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.intro-cta-bg {
  position: absolute;
  inset: 0;
  background: var(--metal-grad);
  background-size: 200% 200%;
  animation: shimmer 4s linear infinite;
  z-index: -1;
}
.intro-cta-text {
  color: #0a0518;
  font-weight: 600;
}
.theme-porcelain .intro-cta-text { color: #1a1a2e; }
.intro-cta-arrow {
  color: #0a0518;
  transition: transform 0.3s;
}
.theme-porcelain .intro-cta-arrow { color: #1a1a2e; }
.intro-cta:hover { transform: translateY(-2px); }
.intro-cta:hover .intro-cta-arrow { transform: translateX(4px); }
.intro-meta {
  display: flex;
  gap: 32px;
  margin-top: 12px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-50);
}
.intro-meta div { display: flex; flex-direction: column; gap: 4px; }
.intro-meta span {
  font-size: 24px;
  font-weight: 300;
  color: var(--ink-90);
  letter-spacing: 0;
}

/* === Demographics === */
.demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 520px;
  width: 100%;
  gap: 28px;
  animation: fadeInUp 0.5s ease-out;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.demo-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-50);
}
.demo-sub {
  font-size: 14px;
  color: var(--ink-50);
  margin: -12px 0 0;
}
.demo-section {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.demo-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-70);
  letter-spacing: 0.04em;
  text-align: left;
}
.demo-label-opt {
  font-size: 11px;
  font-weight: 400;
  color: var(--ink-30);
  margin-left: 6px;
}
.demo-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.demo-chip {
  padding: 10px 22px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--ink-70);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.demo-chip:hover {
  border-color: var(--ink-30);
  color: var(--ink-90);
}
.demo-chip-active {
  border-color: var(--accent-a);
  background: var(--glass-strong);
  color: var(--ink-100);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent-a) 25%, transparent);
}
.demo-genres {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.demo-genre {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 12px 8px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--ink-70);
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}
.demo-genre:hover {
  border-color: var(--ink-30);
}
.demo-genre-active {
  border-color: var(--accent-a);
  background: var(--glass-strong);
  color: var(--ink-100);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent-a) 25%, transparent);
}
.demo-genre-label {
  font-size: 13px;
  font-weight: 500;
}
.demo-genre-sub {
  font-size: 10px;
  color: var(--ink-40);
}
.demo-genre-active .demo-genre-sub {
  color: var(--ink-60);
}
.demo-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  border: none;
  border-radius: 100px;
  background: var(--glass-strong);
  color: var(--ink-100);
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 8px;
  border: 1px solid var(--ink-30);
}
.demo-cta:hover {
  transform: translateY(-2px);
  border-color: var(--accent-a);
  box-shadow: 0 0 24px color-mix(in srgb, var(--accent-a) 30%, transparent);
}
.demo-cta-disabled {
  opacity: 0.3;
  pointer-events: none;
}
.demo-cta-arrow {
  font-size: 18px;
  transition: transform 0.2s ease;
}
.demo-cta:hover .demo-cta-arrow {
  transform: translateX(4px);
}
.demo-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 100px;
  background: transparent;
  color: var(--ink-40);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: color 0.2s;
}
.demo-back:hover {
  color: var(--ink-70);
}
.demo-back-arrow {
  font-size: 14px;
}
@media (max-width: 480px) {
  .demo-genres { grid-template-columns: repeat(2, 1fr); }
  .demo-chip { padding: 9px 16px; font-size: 13px; }
}