:root {
  --bg: #f4f8fc;
  --card: #ffffff;
  --muted: #6b7280;
  --primary: #0b69ff; /* bright blue */
  --primary-700: #0a58d8;
  --accent: #60a5fa;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
}

* {
  box-sizing: border-box;
}

body {
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: #0f172a;
  margin: 0;
  padding: 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

header h1 {
  margin: 0;
  font-size: 20px;
  color: var(--primary-700);
}

nav a {
  color: var(--primary);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  font-weight: 600;
}

nav a:hover {
  background: rgba(11, 105, 255, 0.08);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  background: var(--card);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(11, 20, 40, 0.06);
}

h2,
h3 {
  color: #0f172a;
  margin-top: 0;
}

form label {
  display: block;
  margin: 8px 0;
  color: var(--muted);
}

input[type="text"],
input[type="password"],
select {
  padding: 10px;
  border: 1px solid #e6edf3;
  border-radius: 8px;
  width: 100%;
  max-width: 360px;
}

button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
}

button.secondary {
  background: #eef2ff;
  color: var(--primary);
  border: 1px solid rgba(11, 105, 255, 0.12);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

th,
td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid #eef2f6;
}

th {
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.flash {
  padding: 10px;
  border-radius: 8px;
  margin: 10px 0;
}

.flash.success {
  background: rgba(16, 185, 129, 0.08);
  color: var(--success);
}

.flash.danger {
  background: rgba(239, 68, 68, 0.08);
  color: var(--danger);
}

.flash.warning {
  background: rgba(245, 158, 11, 0.08);
  color: var(--warning);
}

.small {
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 600px) {
  .container {
    padding: 12px;
  }

  nav a {
    display: inline-block;
    margin-bottom: 6px;
  }
}