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

:root {
  --font: 'Inter', 'Noto Sans JP', -apple-system, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --accent: #c97b5b;
  --accent-light: #e09070;
  --max-w: 780px;
  --max-w-wide: 1080px;
  --pad: 40px;
}

[data-theme="dark"] {
  --bg: #060606;
  --bg-card: #0f0f0f;
  --bg-card-hover: #161616;
  --bg-nav: rgba(6,6,6,0.92);
  --border: #181818;
  --border-hover: #2a2a2a;
  --text: #eee;
  --text-sub: #9a9a9a;
  --text-muted: #6a6a6a;
  --accent-glow: rgba(201,123,91,0.10);
  --cta-text: #060606;
}

[data-theme="light"] {
  --bg: #f5f3f0;
  --bg-card: #fff;
  --bg-card-hover: #faf8f5;
  --bg-nav: rgba(245,243,240,0.94);
  --border: #e0dbd4;
  --border-hover: #ccc;
  --text: #1a1a1a;
  --text-sub: #666;
  --text-muted: #aaa;
  --accent-glow: rgba(201,123,91,0.07);
  --cta-text: #fff;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { color: var(--accent); }

.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.rv1 { transition-delay: 0.08s; }
.rv2 { transition-delay: 0.16s; }
.rv3 { transition-delay: 0.24s; }
.rv4 { transition-delay: 0.32s; }
.rv5 { transition-delay: 0.40s; }

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease);
}

.nav-inner {
  max-width: var(--max-w-wide); margin: 0 auto;
  padding: 0 var(--pad); height: 56px;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-back {
  font-size: 0.72rem; font-weight: 500;
  color: var(--text-sub); letter-spacing: 0.05em;
  display: flex; align-items: center; gap: 8px;
  transition: color 0.2s;
}

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

.nav-back svg {
  width: 14px; height: 14px; stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

.theme-toggle {
  width: 32px; height: 32px; border-radius: 6px;
  border: 1px solid var(--border); background: transparent;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all 0.3s; color: var(--text-muted);
}

.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.theme-toggle svg {
  width: 14px; height: 14px; stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* HERO */
.list-hero {
  max-width: var(--max-w-wide); margin: 0 auto;
  padding: 120px var(--pad) 48px;
}

.list-label {
  font-size: 0.6rem; font-weight: 600;
  letter-spacing: 0.35em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
  display: flex; align-items: center; gap: 12px;
}

.list-label::before {
  content: ''; width: 20px; height: 1px; background: var(--accent);
}

.list-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800; letter-spacing: -0.02em;
  line-height: 1.4; margin-bottom: 12px;
}

.list-title .accent { color: var(--accent); }

.list-desc {
  font-size: 0.88rem; color: var(--text-sub);
  line-height: 2; max-width: 540px;
  transition: color 0.5s var(--ease);
}

.list-count {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 20px;
  font-size: 0.7rem; color: var(--text-muted);
  letter-spacing: 0.08em;
  transition: color 0.5s var(--ease);
}

.list-count strong {
  font-size: 1.4rem; font-weight: 900;
  color: var(--accent-light);
}

/* TOOLS GRID */
.tools-grid {
  max-width: var(--max-w-wide); margin: 0 auto;
  padding: 0 var(--pad) 80px;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0;
  position: relative; overflow: hidden;
  transition: all 0.4s var(--ease);
  display: flex; flex-direction: column;
  color: inherit;
}

.tool-card-header {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 20px 20px 14px;
}

.tool-card-info { flex: 1; }

.tool-card-video {
  display: block; position: relative;
  margin: 0 12px; border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.tool-card-video img {
  width: 100%; height: 100%; display: block;
  object-fit: cover;
  transition: transform 0.3s var(--ease);
}

.tool-card-video:hover img { transform: scale(1.03); }

.tool-card-play {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 48px; height: 48px;
  background: rgba(0,0,0,0.6);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: #fff;
  transition: background 0.3s;
}

.tool-card-video:hover .tool-card-play { background: rgba(201,123,91,0.8); }

.tool-card-actions {
  padding: 14px 20px 18px;
}

.tool-card-btn {
  display: block; text-align: center;
  background: #E17850; color: #000;
  font-weight: 700; font-size: 0.82rem;
  padding: 10px; border-radius: 6px;
  text-decoration: none;
  transition: all 0.3s var(--ease);
}

.tool-card-btn:hover {
  background: #c96840; transform: translateY(-1px);
}

.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
  opacity: 0; transition: opacity 0.3s;
}

.tool-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(201,123,91,0.06);
}

.tool-card:hover::before { opacity: 1; }

.tool-card-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--accent-glow);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  transition: all 0.3s;
}

.tool-card:hover .tool-card-icon {
  background: rgba(201,123,91,0.18);
  transform: scale(1.05);
}

.tool-card-icon svg {
  width: 18px; height: 18px; stroke: var(--accent-light);
  fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}

.tool-card-category {
  font-size: 0.55rem; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 6px;
}

.tool-card-title {
  font-size: 1rem; font-weight: 700;
  margin-bottom: 8px;
  transition: color 0.3s;
}

.tool-card:hover .tool-card-title { color: var(--accent-light); }

.tool-card-desc {
  font-size: 0.78rem; color: var(--text-muted);
  line-height: 1.7; flex: 1;
  transition: color 0.5s var(--ease);
}

.tool-card-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 16px; padding-top: 12px;
  border-top: 1px solid var(--border);
  transition: border-color 0.5s var(--ease);
}

.tool-card-time {
  font-size: 0.65rem; color: var(--text-muted);
  transition: color 0.5s var(--ease);
}

.tool-card-arrow {
  font-size: 0.75rem; color: var(--accent);
  opacity: 0; transform: translateX(-4px);
  transition: all 0.3s var(--ease);
}

.tool-card:hover .tool-card-arrow {
  opacity: 1; transform: translateX(0);
}

/* COMING SOON CARD */
.tool-card.coming-soon {
  border-style: dashed;
  opacity: 0.5;
  cursor: default;
}

.tool-card.coming-soon:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--border);
  background: var(--bg-card);
}

.tool-card.coming-soon::before { display: none; }

/* FOOTER */
.page-footer {
  max-width: var(--max-w-wide); margin: 0 auto;
  padding: 32px var(--pad);
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  transition: border-color 0.5s var(--ease);
}

.page-footer span {
  font-size: 0.6rem; color: var(--text-muted);
  transition: color 0.5s var(--ease);
}

@media (max-width: 768px) {
  :root { --pad: 20px; }
  .tools-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr; }
  .page-footer { flex-direction: column; gap: 8px; text-align: center; }
}