:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #166534;
  --danger: #b91c1c;
  --warning: #92400e;
  --shadow: 0 10px 35px rgba(15, 23, 42, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

.container {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.2px;
}

.brand span { color: var(--primary); }

.menu {
  display: flex;
  gap: 18px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.menu a {
  padding: 6px 8px;
  border-radius: 8px;
}

.menu a:hover { background: #eef2ff; color: #1e3a8a; }

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  padding: 42px 0 28px;
  align-items: stretch;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-main { padding: 34px; }

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.hero-side {
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(135deg, #eff6ff, #ffffff);
}

.badge {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1d4ed8;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}

.badge-off { background: #f3f4f6; color: #6b7280; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 24px 0 48px;
}

.feature { padding: 22px; }

.feature h3 { margin: 0 0 8px; font-size: 18px; }

.feature p { margin: 0; color: var(--muted); line-height: 1.6; font-size: 14px; }

.page { padding: 34px 0 60px; }

.page-title { margin: 0 0 18px; font-size: 30px; }

.muted { color: var(--muted); }

.form-card {
  max-width: 480px;
  padding: 28px;
  margin: 0 auto;
}

label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
}

input, textarea, select {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  margin-bottom: 16px;
  font-size: 15px;
  outline: none;
  background: #fff;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.btn:hover { background: var(--primary-dark); }

.btn-light { background: #eef2ff; color: #1e3a8a; }

.btn-danger { background: #fee2e2; color: #991b1b; }

.alert {
  padding: 14px 16px;
  border-radius: 12px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

.alert-success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }

.alert-warning { background: #fffbeb; color: var(--warning); border: 1px solid #fde68a; }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th, .table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.section { margin-bottom: 24px; }

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-ok { background: #dcfce7; color: #166534; }

.status-pending { background: #e5e7eb; color: #374151; }

footer {
  padding: 22px 0 40px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .columns { grid-template-columns: 1fr; }
  .menu { justify-content: flex-start; }
}