:root {
  --primary: #0056b3;
  --primary-dark: #003d80;
  --danger: #dc3545;
  --success: #28a745;
  --warning: #f0ad4e;
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #212529;
  --muted: #6c757d;
  --border: #dee2e6;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  box-shadow: var(--shadow);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header .brand {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
}

.header nav a {
  margin-left: 18px;
  font-size: 0.95rem;
  color: var(--muted);
}

.header nav a:hover { color: var(--primary); }

.main { padding: 30px 0; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

h1, h2, h3 { margin-top: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 0;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.danger { background: var(--danger); }
.btn.success { background: var(--success); }
.btn.warning { background: var(--warning); color: #000; }
.btn.secondary { background: var(--muted); }

.btn-small { padding: 6px 12px; font-size: 0.85rem; }

.form-group { margin-bottom: 18px; }
label { display: block; margin-bottom: 6px; font-weight: 500; }
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
}
textarea { min-height: 120px; resize: vertical; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 18px;
}
.alert-error { background: #f8d7da; color: #721c24; }
.alert-success { background: #d4edda; color: #155724; }

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 12px;
  border-bottom: 1px solid var(--border);
}
th { font-weight: 600; color: var(--muted); }

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}
.badge-open { background: #e2e3e5; color: #383d41; }
.badge-helpdesk { background: #fff3cd; color: #856404; }
.badge-work_in_progress { background: #cce5ff; color: #004085; }
.badge-user_acceptance { background: #d1ecf1; color: #0c5460; }
.badge-closed { background: #d4edda; color: #155724; }
.badge-done { background: #c3e6cb; color: #155724; }

.priority-low { color: #6c757d; }
.priority-medium { color: #f0ad4e; }
.priority-high { color: #fd7e14; }
.priority-critical { color: #dc3545; font-weight: 700; }

.grid { display: grid; gap: 20px; }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.stat {
  background: var(--card);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}
.stat .value { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat .label { color: var(--muted); font-size: 0.9rem; }

.message {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}
.message.internal { background: #fffbea; border-color: #ffe58f; }
.message .meta { font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }

.locale-switch { margin-left: 18px; }
.locale-switch select { width: auto; display: inline-block; padding: 6px 10px; }

.login-box { max-width: 420px; margin: 60px auto; }

@media (max-width: 768px) {
  .header .container { flex-wrap: wrap; }
  .header nav { margin-top: 10px; }
  .header nav a { margin-left: 0; margin-right: 14px; }
}