:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #e2e4e9;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger-bg: #fef2f2;
  --danger-text: #b91c1c;
  --danger-border: #fecaca;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #1a1d24;
    --border: #2a2e37;
    --text: #e8e9ec;
    --text-muted: #9aa0ab;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --danger-bg: #2a1414;
    --danger-text: #f87171;
    --danger-border: #4a1f1f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.login-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.4rem;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.login-card label {
  display: block;
  font-size: 0.85rem;
  margin: 0.9rem 0 0.3rem;
  color: var(--text-muted);
}

.login-card input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.login-card input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.login-card button {
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.65rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

.login-card button:hover { background: var(--accent-hover); }

.alert {
  background: var(--danger-bg);
  color: var(--danger-text);
  border: 1px solid var(--danger-border);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font-size: 0.85rem;
}

/* Portal */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  font-size: 1.2rem;
  margin: 0;
}

.topbar form {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-badge {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}

.btn-ghost:hover { background: var(--bg); }

.content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}

.group { margin-bottom: 2rem; }

.group h2 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 0 0 0.9rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.card-title { font-weight: 600; margin-bottom: 0.25rem; }
.card-desc { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.6rem; }
.card-url { font-size: 0.78rem; color: var(--accent); word-break: break-all; }