:root {
  --bg: #f5f7fb;
  --text: #0f172a;
  --muted: #5b6472;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --badge: #f59e0b;
  --shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
  --topbar-bg: rgba(255, 255, 255, 0.85);
  --topbar-text: #0f172a;
  --topbar-border: #e5e7eb;
}
[data-theme="dark"] {
  --bg: #0b1220;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --card: #101827;
  --border: #1e293b;
  --accent: #60a5fa;
  --accent-soft: #1e3a8a;
  --badge: #fbbf24;
  --shadow: 0 15px 35px rgba(0, 0, 0, 0.35);
  --topbar-bg: rgba(15, 23, 42, 0.85);
  --topbar-text: #e2e8f0;
  --topbar-border: #1e293b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--topbar-bg);
  color: var(--topbar-text);
  border-bottom: 1px solid var(--topbar-border);
  backdrop-filter: blur(12px);
}
.topbar.topbar-transparent {
  position: absolute;
  width: 100%;
  background: transparent;
  border-bottom: 1px solid transparent;
}
.topbar nav { display: flex; align-items: center; gap: 14px; }
.brand { font-weight: 700; letter-spacing: 0.4px; }
.theme-toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
}
.container { max-width: 1080px; margin: 32px auto; padding: 0 20px; }
.container.narrow { max-width: 440px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 18px;
  display: block;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { transform: translateY(-3px); }
.card-title { font-weight: 600; margin-bottom: 6px; }
.badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--badge);
  color: #111;
  border-radius: 999px;
  font-size: 12px;
}
form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; color: var(--muted); }
input, select, button {
  padding: 10px 12px;
  font-size: 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}
button { cursor: pointer; }
.btn {
  padding: 10px 14px;
  border: 1px solid var(--border);
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
}
.btn.secondary { background: transparent; color: var(--text); }
.error { color: #ef4444; margin-top: 10px; }
.notice {
  background: rgba(34, 197, 94, 0.1);
  padding: 12px;
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 10px;
}
.hero {
  background: linear-gradient(135deg, #1d4ed8, #3b82f6);
  color: #fff;
  padding: 80px 20px 60px;
}
.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.hero-link {
  color: #fff;
  border: 1px solid #fff;
  padding: 10px 14px;
  border-radius: 10px;
}
.consent-banner {
  position: fixed;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.consent-content { display: grid; gap: 10px; color: var(--text); }