:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #eff6ff;
  --secondary: #64748b;
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --warning: #eab308;
  --warning-bg: #fef9c3;
  --danger: #ef4444;
  --danger-bg: #fee2e2;
  --radius: 12px;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  margin: 0;
  line-height: 1.5;
}

* { box-sizing: border-box; }

a { text-decoration: none; color: inherit; transition: color 0.2s; }

/* LAYOUT */
.dashboard-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* NAVBAR */
.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}

.nav-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-item {
  font-weight: 500;
  color: var(--secondary);
  font-size: 0.95rem;
}
.nav-item:hover, .nav-item.active {
  color: var(--primary);
}

/* GRID SYSTEM */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .navbar { padding: 0 16px; }
  .dashboard-container { padding: 16px; }
}

/* CARDS */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  height: 100%;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
}

/* STATS CARD */
.stat-card {
  display: flex;
  flex-direction: column;
}
.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 8px 0;
}
.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  gap: 8px;
}
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

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

.btn-secondary { background: white; border: 1px solid var(--border); color: var(--text-main); }
.btn-secondary:hover { background: var(--bg-body); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { opacity: 0.9; }

.btn-success { background: var(--success); color: white; }

/* TABLE */
.table-container {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th {
  text-align: left;
  padding: 12px 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--bg-body);
}
td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
  font-size: 0.95rem;
}
tr:last-child td { border-bottom: none; }

/* BADGES */
.badge {
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-block;
}
.badge-active { background: var(--success-bg); color: var(--success); }
.badge-expired { background: var(--danger-bg); color: var(--danger); }
.badge-pending { background: var(--warning-bg); color: var(--warning); }

/* CHAT / MESSAGES */
.chat-box {
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  height: 300px;
  overflow-y: auto;
  margin-bottom: 16px;
}
.msg {
  margin-bottom: 12px;
  max-width: 80%;
  padding: 12px;
  border-radius: 12px;
  font-size: 0.95rem;
}
.msg-in {
  background: white;
  border: 1px solid var(--border);
  margin-right: auto;
  border-bottom-left-radius: 2px;
}
.msg-out {
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  margin-left: auto;
  border-bottom-right-radius: 2px;
}
.msg-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  display: block;
}

/* FORMS */
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* UTILS */
.mt-4 { margin-top: 24px; }
.mb-4 { margin-bottom: 24px; }
.text-right { text-align: right; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }