/* ===========================================================
   base.css — Global Theme, Glass, Layout, Header
   =========================================================== */

/* -------------------- CSS VARIABLES -------------------- */
:root {
  --max-width: 1200px;

  /* Background tones */
  --bg-dark-1: #05040a;
  --bg-dark-2: #071028;
  --bg-dark-3: #0a1830;

  --bg-light-1: #f7fbff;
  --bg-light-2: #eef6ff;

  /* Glass */
  --glass-blur: 22px;
  --glass-saturation: 160%;
  --radius-md: 12px;
  --radius-lg: 18px;

  /* Neon Colors */
  --accent: #60a5fa;
  --accent-2: #a78bfa;
  --accent-glow: rgba(96,165,250,0.18);

  /* Text */
  --text-light: #eef2ff;
  --muted-light: #9aa8c3;
  --text-dark: #0b1220;
  --muted-dark: #556377;

  /* Borders */
  --border-dark: rgba(255,255,255,0.08);
  --border-light: rgba(15,23,42,0.06);

  --tab-height: 44px;
}

/* -------------------- GLOBAL BASE -------------------- */
body {
  margin: 0;
  font-family: "Inter", system-ui, sans-serif;
  color: var(--text-light);
  background:
    radial-gradient(900px 420px at 12% 6%, rgba(103,23,119,0.12), transparent 8%),
    radial-gradient(700px 380px at 98% 90%, rgba(8,30,66,0.32), transparent 12%),
    linear-gradient(180deg, var(--bg-dark-1), var(--bg-dark-2), var(--bg-dark-3));
  transition: background 0.35s ease, color 0.3s ease;
}

body.theme-light {
  color: var(--text-dark);
  background:
    radial-gradient(800px 400px at 10% 4%, rgba(140,160,255,0.10), transparent 14%),
    linear-gradient(180deg, var(--bg-light-1), var(--bg-light-2));
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px;
}

/* -------------------- HEADER -------------------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 20px;
  border-radius: calc(var(--radius-md) + 6px);

  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.07);
  box-shadow: 0 8px 24px rgba(0,0,0,0.28);
  backdrop-filter: blur(calc(var(--glass-blur) - 8px)) saturate(var(--glass-saturation));
}

body.theme-light .topbar {
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--border-light);
  box-shadow: 0 6px 20px rgba(0,0,0,0.06);
}

.brand h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  margin: 2px 0 0;
  color: var(--muted-light);
}
body.theme-light .subtitle {
  color: var(--muted-dark);
}

/* -------------------- SEARCH -------------------- */
.controls {
  flex: 1;
  max-width: 520px;
}

#search {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: inherit;
  font-size: 14px;
  backdrop-filter: blur(12px) saturate(140%);
  transition: transform .12s ease, border-color .18s ease, box-shadow .18s ease;
}

#search:focus {
  border-color: var(--accent);
  box-shadow: 0 8px 30px var(--accent-glow);
  transform: translateY(-1px);
}

body.theme-light #search {
  background: rgba(255,255,255,0.95);
  border: 1px solid var(--border-light);
  color: var(--text-dark);
}

/* -------------------- THEME BUTTON -------------------- */
.icon-btn {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}

body.theme-light .icon-btn {
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--border-light);
}

/* -------------------- FOOTER -------------------- */
.footer {
  margin-top: 36px;
  padding: 18px;
  text-align: center;
  border-radius: 14px;

  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 8px 24px rgba(0,0,0,0.28);
}

body.theme-light .footer {
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--border-light);
  color: var(--muted-dark);
}

/* -------------------- EMPTY + LOADING -------------------- */
.empty-state,
.loading {
  padding: 40px;
  text-align: center;
  color: var(--muted-light);
}
body.theme-light .empty-state,
body.theme-light .loading {
  color: var(--muted-dark);
}