:root {
  --bg: #0b1120;
  --bg2: #0f1629;
  --card: #151d2e;
  --card-hover: #1a2438;
  --card-active: #1e2a42;
  --border: rgba(148,163,184,0.08);
  --border-light: rgba(148,163,184,0.15);
  --accent: #7c6bc4;
  --accent-soft: rgba(124,107,196,0.08);
  --accent-glow: rgba(124,107,196,0.2);
  --teal: #8b7fd4;
  --teal-soft: rgba(139,127,212,0.06);
  --green: #10b981;
  --yellow: #f59e0b;
  --orange: #f97316;
  --red: #ef4444;
  --pink: #d946a8;
  --text: #e8edf5;
  --text-secondary: #8b95a8;
  --text-dim: #586174;
  --glass: rgba(15,22,41,0.9);
  --serif: 'Merriweather', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}
[data-theme='light'] {
  --bg: #f7f8fb; --bg2: #eef0f5; --card: #ffffff; --card-hover: #f8f9fc;
  --card-active: #eef0f5; --border: rgba(0,0,0,0.06); --border-light: rgba(0,0,0,0.1);
  --accent: #6c5ba7; --accent-soft: rgba(108,91,167,0.06); --accent-glow: rgba(108,91,167,0.12);
  --teal: #7b6fc0; --teal-soft: rgba(123,111,192,0.05);
  --green: #059669; --yellow: #d97706; --orange: #ea580c; --red: #dc2626;
  --pink: #c026a3;
  --text: #1a1f2e; --text-secondary: #4a5568; --text-dim: #8b95a8;
  --glass: rgba(255,255,255,0.95);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  font-size: 15px;
  line-height: 1.6;
}
.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 900; }
h1 { font-size: 2.2rem; letter-spacing: -0.03em; color: var(--text); margin-bottom: 16px; }
h2 { font-size: 1.3rem; letter-spacing: -0.02em; color: var(--text); margin-bottom: 12px; }

/* Nav */
.nav-bar {
  position: sticky; top: 0; z-index: 100;
  background: var(--glass); backdrop-filter: blur(24px) saturate(1.3);
  border-bottom: 1px solid var(--border);
}
.nav-content {
  max-width: 960px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.nav-logo {
  font-family: var(--serif); font-size: 1.15rem; font-weight: 900;
  color: var(--text); text-decoration: none;
  display: flex; align-items: center; gap: 10px;
  letter-spacing: -0.3px;
}
.nav-logo .logo-mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--teal));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 0.95rem; color: white; font-weight: 900;
}
.nav-menu-wrapper { position: relative; }
.nav-menu-trigger {
  color: var(--text-secondary); font-size: 0.82rem; font-weight: 500;
  padding: 6px 14px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--border); background: transparent;
  transition: all var(--transition); display: flex; align-items: center; gap: 6px;
  font-family: var(--sans);
}
.nav-menu-trigger:hover { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.nav-menu-trigger::after { content: "▾"; font-size: 0.65rem; }
.nav-links {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--card);
  border: 1px solid var(--border-light); border-radius: var(--radius);
  padding: 6px 0; box-shadow: var(--shadow-lg);
  z-index: 9999; min-width: 220px; flex-direction: column;
}
.nav-links.open { display: flex; animation: fadeSlide 0.2s ease-out; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.82rem; font-weight: 500;
  padding: 9px 20px; transition: all var(--transition);
  display: block;
}
.nav-links a:hover { background: var(--accent-soft); color: var(--accent); }
.nav-links a.special { border-top: 1px solid var(--border); color: var(--accent); }
.nav-controls { display: flex; align-items: center; gap: 8px; }
.control-button {
  padding: 6px 10px; border-radius: 6px; border: 1px solid var(--border);
  background: transparent; color: var(--text-dim);
  font-size: 0.78rem; font-weight: 500; cursor: pointer;
  transition: all var(--transition); font-family: var(--sans);
}
.control-button:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle { width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }

/* Cards */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  transition: all var(--transition); margin-bottom: 16px;
}
.card:hover { border-color: var(--border-light); }

/* Buttons */
.btn { padding: 10px 24px; border: none; border-radius: 8px; font-family: var(--sans); font-weight: 600; font-size: 0.88rem; cursor: pointer; transition: all var(--transition); }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #6b5ab3; transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* Footer */
.shared-footer {
  text-align: center; padding: 32px 24px; margin-top: 48px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem; color: var(--text-dim); line-height: 1.8;
}
.shared-footer a { color: var(--accent); text-decoration: none; }
.shared-footer a:hover { text-decoration: underline; }

/* Utility */
a { color: var(--accent); }
select, input[type=number], input[type=text], textarea {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px; color: var(--text); font-size: 0.88rem; font-family: var(--sans);
}
select:focus, input:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
label { font-size: 0.82rem; color: var(--text-secondary); display: block; margin-bottom: 4px; }

@media(max-width:600px) {
  h1 { font-size: 1.6rem; }
  .container { padding: 0 16px; }
}