:root {
  --bg: #0f172a;
  --card: #ffffff;
  --muted: #64748b;
  --green: #05a045;
  --green-dark: #048a3a;
  --border: #e2e8f0;
  --error: #b91c1c;
  --error-bg: #fef2f2;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }

.auth-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #0f172a 0%, #1e293b 45%, #ecfdf5 100%);
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.35);
}
.auth-card.wide { max-width: 440px; }

.auth-card h1 { margin: 0 0 8px; font-size: 1.35rem; color: #0f172a; }
.muted { color: var(--muted); font-size: 0.9rem; margin: 0 0 20px; }
.hint { margin-top: 16px; font-size: 0.85rem; }
.hint a { color: var(--green); font-weight: 600; }

.form-stack { display: flex; flex-direction: column; gap: 14px; }
.form-stack label { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; color: #334155; }
.form-stack input {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.95rem;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); }
.btn-ghost { background: #f1f5f9; color: #0f172a; }

.alert { padding: 12px 14px; border-radius: 12px; font-size: 0.9rem; margin-bottom: 16px; }
.alert-error { background: var(--error-bg); color: var(--error); }
.alert-ok { background: #ecfdf5; color: #065f46; }

.layout { display: flex; min-height: 100vh; background: #f8fafc; }

.sidebar {
  width: 240px;
  background: var(--bg);
  color: #e2e8f0;
  padding: 24px 0;
  flex-shrink: 0;
}
.brand { padding: 0 20px 20px; font-weight: 900; font-size: 1rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar nav { padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; }
.sidebar nav a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.9rem;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar nav a.active { background: var(--green); color: #fff; }
.sidebar nav a.disabled { opacity: 0.45; pointer-events: none; cursor: default; }
.nav-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.12em; color: #64748b; padding: 12px 12px 4px; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.content { padding: 28px; }
.content h2 { margin: 0 0 12px; font-size: 1.5rem; color: #0f172a; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 20px; }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 1px 2px rgba(15,23,42,0.04);
}
.card h3 { margin: 0 0 8px; font-size: 1rem; color: #0f172a; }
.card p { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.6; }
.card code { font-size: 0.8rem; background: #f1f5f9; padding: 2px 6px; border-radius: 6px; }