/* =========================================
   zhaozhaomumu.fun — Design System
   Bright · Clean · 8-bit Pixel Accents
   ========================================= */

/* --- Design Tokens --- */
:root {
  --bg: #FAFAF9;
  --card: #FFFFFF;
  --text: #292524;
  --text-muted: #A8A29E;
  --text-dim: #D6D3D1;
  --border: #E7E5E4;
  --blue: #3B82F6;
  --blue-deep: #2563EB;
  --amber: #F59E0B;
  --amber-deep: #D97706;
  --green: #10B981;
  --green-deep: #059669;
  --font-pixel: "Press Start 2P", monospace;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; height: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: 800px;
  padding: 2rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/* --- Header / Brand --- */
header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  margin-bottom: 1.5rem;
}

.brand {
  font-family: var(--font-pixel);
  font-size: 0.8rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

.brand-dot { color: var(--blue); }

/* --- Tab Navigation --- */
header nav { display: flex; gap: 2px; }

.tab-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.2rem;
  font-family: var(--font-pixel);
  font-size: 0.6rem;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--card);
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text);
  border-color: var(--blue);
  background: #EFF6FF;
}

.tab-btn.active {
  color: var(--card);
  background: var(--blue);
  border-color: var(--blue-deep);
}

/* --- Main Content Area --- */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: 2rem;
}

/* --- Hero Title --- */
.hero-title {
  text-align: center;
}

.hero-title h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  margin-bottom: 0.4rem;
}

.hero-title .slogan {
  font-size: 1.15rem;
  color: var(--blue);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* --- Scene Wrapper --- */
.scene-wrapper {
  border: 2px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  width: 640px;
  max-width: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.scene-wrapper:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
}

#pixel-scene {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
}

/* --- Scene Overlay --- */
.scene-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.8rem 0 1rem;
  background: var(--card);
  border-top: 1px solid var(--border);
}

.overlay-title {
  font-family: var(--font-pixel);
  font-size: 0.6rem;
  color: var(--text);
  letter-spacing: 0.05em;
}

.overlay-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* --- Section Nav (entry cards) --- */
.section-nav {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.section-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 1.5rem 2.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.25s ease;
  min-width: 160px;
}

.section-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.12);
}

.section-card .icon {
  font-size: 1.8rem;
}

.section-card .label {
  font-family: var(--font-pixel);
  font-size: 0.6rem;
  color: var(--text);
}

.section-card .desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Pixel Divider --- */
.pixel-divider {
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 3px;
  padding: 1.5rem 0 1rem;
  height: 32px;
  align-items: center;
}

.pixel-divider::before,
.pixel-divider::after {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  background: var(--border);
}

.pixel-divider::before {
  box-shadow:
    12px 0 0 0 var(--border),
    24px 0 0 0 var(--blue),
    36px 0 0 0 var(--border),
    48px 0 0 0 var(--amber),
    60px 0 0 0 var(--border);
}

.pixel-divider::after {
  box-shadow:
    -12px 0 0 0 var(--border),
    -24px 0 0 0 var(--blue),
    -36px 0 0 0 var(--border),
    -48px 0 0 0 var(--amber),
    -60px 0 0 0 var(--border);
}

/* --- Footer --- */
footer {
  width: 100%;
  text-align: center;
  padding: 1rem 0 1.5rem;
}

footer p { font-size: 0.75rem; color: var(--text-dim); }
footer a { color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
footer a:hover { color: var(--text-muted); }
.copyright { margin-top: 0.3rem; }

/* --- Responsive --- */
@media (max-width: 700px) {
  .container { padding: 1.25rem 1rem; }
  header { flex-direction: column; gap: 1rem; }
  
  .hero-title h1 { font-size: 1.3rem; }
  .hero-title .slogan { font-size: 1rem; }
  
  .scene-wrapper { width: 100%; }
  
  .section-nav { flex-direction: column; align-items: center; }
  .section-card { min-width: 220px; width: 100%; max-width: 300px; }
}