/* ========== Reset ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body { width: 100%; height: 100%; overflow: hidden; background: #000; }
body { font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif; color: #fff; -webkit-font-smoothing: antialiased; }

/* ========== CSS Variables ========== */
:root {
  --deep-sea: #05080f;
  --midnight: #0a0a1a;
  --starlight: #1a3a5c;
  --electron-blue: #00d4ff;
  --electron-purple: #aa88ff;
  --silver-blue: #88ddff;
  --lighthouse-gold: #f0c040;
  --warm-white: #fff8e7;
  --moon-silver: #c0d0e0;
  --blood-dark: #2b0a0a;
  --blood-deep: #110404;
  --dark-gold: #c99a3b;
  --pure-white: #ffffff;
  --glass-bg: rgba(10, 14, 26, 0.85);
  --glass-border: rgba(0, 212, 255, 0.15);
  --transition-page: 0.8s ease;
  --transition-modal-in: 0.3s ease;
  --transition-modal-out: 0.2s ease;
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-heading: 'Orbitron', 'PingFang SC', sans-serif;
  --font-body: 'Inter', 'PingFang SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --glow-blue: 0 0 10px rgba(0, 212, 255, 0.6), 0 0 30px rgba(0, 212, 255, 0.2);
  --glow-gold: 0 0 10px rgba(240, 192, 64, 0.6), 0 0 30px rgba(240, 192, 64, 0.2);
}

/* ========== Page System ========== */
.page {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-page);
  z-index: 1;
  overflow: hidden;
}
.page.active {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
}

/* ========== Glass Panel ========== */
.glass-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 2rem;
  max-width: 520px;
  width: 90%;
  position: relative;
}

/* ========== Buttons ========== */
.glow-btn {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--pure-white);
  background: transparent;
  border: 1px solid var(--electron-blue);
  border-radius: 6px;
  padding: 0.7rem 1.6rem;
  cursor: pointer;
  text-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
  box-shadow: var(--glow-blue);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  letter-spacing: 0.05em;
}
.glow-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.8), 0 0 45px rgba(0, 212, 255, 0.3);
}
.glow-btn:active { transform: scale(0.95); }
.pulse-btn { animation: pulse-glow 2s ease-in-out infinite; }

/* ========== Global Nav ========== */
#global-nav {
  position: fixed; bottom: 1.5rem; left: 1.5rem; z-index: 100; display: flex; gap: 0.5rem;
}
.nav-btn {
  font-family: var(--font-heading); font-size: 0.75rem; font-weight: 400;
  color: var(--silver-blue); background: var(--glass-bg);
  border: 1px solid var(--glass-border); border-radius: 6px;
  padding: 0.5rem 0.8rem; cursor: pointer; backdrop-filter: blur(8px);
  transition: opacity 0.2s, transform 0.15s;
}
.nav-btn:hover { transform: scale(1.05); }
.nav-btn:active { transform: scale(0.95); }
.nav-btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none; }

/* ========== Audio Panel ========== */
#audio-panel { position: fixed; top: 1.5rem; right: 1.5rem; z-index: 100; }
.audio-btn {
  font-size: 1.2rem; color: var(--silver-blue); background: var(--glass-bg);
  border: 1px solid var(--glass-border); border-radius: 50%;
  width: 40px; height: 40px; cursor: pointer; backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
}
.audio-controls {
  margin-top: 0.5rem; background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 0.8rem; display: flex; flex-direction: column;
  gap: 0.5rem; backdrop-filter: blur(12px);
}
.audio-label {
  font-family: var(--font-heading); font-size: 0.65rem; color: var(--silver-blue);
  cursor: pointer; text-align: center; padding: 0.3rem;
  border: 1px solid var(--glass-border); border-radius: 4px;
}
#audio-volume { width: 100%; accent-color: var(--electron-blue); }

/* ========== Modal ========== */
.modal {
  position: fixed; inset: 0; z-index: 200; display: flex; align-items: center;
  justify-content: center; opacity: 0; pointer-events: none;
  transition: opacity var(--transition-modal-in);
}
.modal.visible { opacity: 1; pointer-events: auto; display: flex !important; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.7); }
.modal-content { position: relative; z-index: 1; }
.modal-close {
  position: absolute; top: 0.8rem; right: 0.8rem; background: none; border: none;
  color: var(--silver-blue); font-size: 1.2rem; cursor: pointer; z-index: 10;
}

/* ========== Toast ========== */
#toast-container {
  position: fixed; top: 1.5rem; left: 50%; transform: translateX(-50%);
  z-index: 300; display: flex; flex-direction: column; gap: 0.5rem;
  align-items: center; pointer-events: none;
}
.toast {
  font-family: var(--font-body); font-size: 0.85rem; color: var(--warm-white);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 8px; padding: 0.6rem 1.2rem; backdrop-filter: blur(12px);
  pointer-events: auto; animation: toast-in 0.3s ease forwards;
}
.toast.fade-out { animation: toast-out 0.3s ease forwards; }

/* ========== Utility ========== */
.hidden { display: none !important; }
.text-glow { text-shadow: 0 0 10px rgba(0, 212, 255, 0.5); }
.text-glow-gold { text-shadow: 0 0 10px rgba(240, 192, 64, 0.5); }

/* ========== Ship SVG ========== */
.ship-svg { width: 100%; height: 100%; }