/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deep:    #0a0e1a;
  --bg-mid:     #111827;
  --ocean:      #0d1b2a;
  --land:       #1c2a3d;
  --land-stroke:#2a3f5f;
  --visited:    #f59e0b;
  --visited-glow: rgba(245, 158, 11, 0.5);
  --home:       #ef4444;
  --home-glow:  rgba(239, 68, 68, 0.6);
  --text:       #e2e8f0;
  --text-dim:   #94a3b8;
  --text-faint: #64748b;
  --panel-bg:   rgba(17, 24, 39, 0.85);
  --panel-border: rgba(148, 163, 184, 0.1);
}

html, body {
  width: 100%;
  min-height: 100vh;
  background: var(--bg-deep);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  overflow-x: hidden;
}

/* ========== Starry Background ========== */
.stars-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 20% 50%, #1a2744 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, #1e1a3a 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, #0f2027 0%, transparent 50%),
    var(--bg-deep);
}
.stars-bg::before,
.stars-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 30% 70%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 50% 30%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 70% 80%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 90% 40%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 15% 85%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1.5px 1.5px at 85% 15%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 45% 55%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 65% 25%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 25% 45%, rgba(255,255,255,0.3), transparent);
  background-size: 100% 100%;
  animation: twinkle 8s ease-in-out infinite alternate;
}
.stars-bg::after {
  background-image:
    radial-gradient(1px 1px at 5% 60%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 35% 15%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 55% 75%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 75% 45%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 95% 85%, rgba(255,255,255,0.4), transparent),
    radial-gradient(2px 2px at 50% 10%, rgba(255,255,255,0.8), transparent),
    radial-gradient(1.5px 1.5px at 20% 90%, rgba(255,255,255,0.5), transparent);
  animation-delay: -4s;
}
@keyframes twinkle {
  0%   { opacity: 0.5; }
  100% { opacity: 1; }
}

/* ========== Header ========== */
.site-header {
  text-align: center;
  padding: 3rem 1rem 1.5rem;
}
.site-title {
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
}
.title-en {
  display: block;
  background: linear-gradient(135deg, #f59e0b, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.title-zh {
  display: block;
  font-size: 0.55em;
  font-weight: 400;
  color: var(--text-dim);
  margin-top: 0.2rem;
  letter-spacing: 0.3em;
}
.site-subtitle {
  margin-top: 0.8rem;
  font-size: clamp(0.9rem, 2.2vw, 1.1rem);
  color: var(--text-dim);
}
.site-subtitle strong {
  color: var(--visited);
  font-size: 1.2em;
  font-weight: 700;
}

/* ========== Map ========== */
.map-container {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}
#world-map {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 0 30px rgba(245, 158, 11, 0.08));
}
.country {
  stroke: var(--land-stroke);
  stroke-width: 0.4;
  stroke-linejoin: round;
  cursor: default;
  transition: fill 0.3s ease, stroke-width 0.2s ease, filter 0.3s ease;
}
.country.land {
  fill: var(--land);
}
.country.visited {
  fill: var(--visited);
  stroke: rgba(255, 220, 150, 0.6);
  stroke-width: 0.6;
  cursor: pointer;
  animation: visited-pulse 3s ease-in-out infinite;
}
.country.visited:hover {
  fill: #fbbf24;
  stroke-width: 1.2;
  filter: drop-shadow(0 0 8px var(--visited-glow));
}
.country.home {
  fill: var(--home);
  stroke: rgba(255, 180, 180, 0.8);
  stroke-width: 0.8;
  cursor: pointer;
  animation: home-pulse 2.5s ease-in-out infinite;
}
.country.home:hover {
  fill: #f87171;
  stroke-width: 1.4;
  filter: drop-shadow(0 0 10px var(--home-glow));
}
@keyframes visited-pulse {
  0%, 100% { filter: drop-shadow(0 0 2px var(--visited-glow)); }
  50%      { filter: drop-shadow(0 0 8px var(--visited-glow)); }
}
@keyframes home-pulse {
  0%, 100% { filter: drop-shadow(0 0 3px var(--home-glow)); }
  50%      { filter: drop-shadow(0 0 12px var(--home-glow)); }
}

/* Dot markers (for tiny countries) */
.dot-core {
  transition: transform 0.2s ease;
  transform-origin: center;
  transform-box: fill-box;
}
.dot-core:hover {
  transform: scale(1.4);
}
.dot-glow {
  animation: dot-pulse 2.5s ease-in-out infinite;
  transform-origin: center;
  transform-box: fill-box;
}
@keyframes dot-pulse {
  0%, 100% { transform: scale(1);   opacity: 0.5; }
  50%      { transform: scale(2.2); opacity: 0.1; }
}

/* ========== Tooltip ========== */
.tooltip {
  position: fixed;
  pointer-events: none;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  color: var(--text);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  opacity: 0;
  transform: translate(-50%, -130%);
  transition: opacity 0.15s ease;
  z-index: 100;
  white-space: nowrap;
}
.tooltip.visible { opacity: 1; }
.tooltip-name { font-weight: 600; }
.tooltip-tag {
  display: inline-block;
  margin-top: 0.2rem;
  font-size: 0.7rem;
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}
.tooltip-tag.home { background: rgba(239,68,68,0.2); color: #fca5a5; }
.tooltip-tag.visited { background: rgba(245,158,11,0.2); color: #fcd34d; }

/* ========== Country Panel ========== */
.country-panel {
  max-width: 900px;
  margin: 2rem auto 0;
  padding: 1.5rem 1.5rem 2rem;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
}
.country-panel h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}
.country-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.country-list li {
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  color: #fcd34d;
  transition: all 0.2s ease;
  cursor: pointer;
}
.country-list li:hover {
  background: rgba(245, 158, 11, 0.25);
  transform: translateY(-1px);
}
.country-list li.home-tag {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}
.country-list li.home-tag:hover {
  background: rgba(239, 68, 68, 0.25);
}

/* ========== Footer ========== */
.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-faint);
  font-size: 0.8rem;
}

/* ========== Responsive ========== */
@media (max-width: 640px) {
  .site-header { padding: 2rem 1rem 1rem; }
  .country-panel { margin: 1.5rem 0.75rem 0; padding: 1rem; }
  .country-list li { font-size: 0.78rem; padding: 0.3rem 0.65rem; }
}