@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Light Mode (Default) */
:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-inverse: #ffffff;

  --border-color: #e2e8f0;
  --border-color-hover: #cbd5e1;

  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;

  --success: #059669;
  --success-bg: #d1fae5;
  --warning: #d97706;
  --warning-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition: all 0.2s ease-in-out;
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d28;
  --bg-tertiary: #232736;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-inverse: #ffffff;

  --border-color: #334155;
  --border-color-hover: #475569;

  --accent-primary: #3b82f6;
  --accent-hover: #60a5fa;

  --success: #34d399;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #fbbf24;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #f87171;
  --danger-bg: rgba(239, 68, 68, 0.15);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.02em; color: var(--text-primary); }
a { color: var(--accent-primary); }

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 2rem; width: 100%; }
.auth-container, .form-container {
  max-width: 520px; margin: 4rem auto; padding: 2.5rem;
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
}
.dashboard-container { max-width: 1200px; margin: 2rem auto; }

/* Header */
header {
  background: var(--bg-secondary); border-bottom: 1px solid var(--border-color);
  padding: 1rem 0; position: sticky; top: 0; z-index: 10;
}
.nav-content { max-width: 1200px; margin: 0 auto; padding: 0 2rem; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); text-decoration: none; display: flex; align-items: center; gap: 0.5rem; }
.logo span { color: var(--accent-primary); }
.logo i { color: var(--accent-primary); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: inherit; font-size: 0.9rem; font-weight: 500;
  padding: 0.6rem 1.1rem; border-radius: var(--radius-md);
  border: 1px solid transparent; cursor: pointer; transition: var(--transition);
  text-decoration: none; white-space: nowrap;
}
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--accent-primary); color: var(--text-inverse); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-secondary); color: var(--text-primary); border-color: var(--border-color); }
.btn-secondary:hover { border-color: var(--border-color-hover); background: var(--bg-tertiary); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-icon { background: none; border: none; cursor: pointer; color: var(--text-secondary); font-size: 1rem; }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 500; margin-bottom: 0.4rem; color: var(--text-primary); }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
  width: 100%; padding: 0.6rem 0.8rem; font-family: inherit; font-size: 0.9rem;
  background: var(--bg-secondary); color: var(--text-primary);
  border: 1px solid var(--border-color); border-radius: var(--radius-md);
  transition: var(--transition); outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent-primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.form-group input[type="file"] { font-size: 0.85rem; }

/* Alerts */
.alert { display: none; padding: 0.85rem 1rem; border-radius: var(--radius-md); margin-bottom: 1.5rem; font-size: 0.9rem; }
.alert-success { display: block; background: var(--success-bg); color: var(--success); }
.alert-error { display: block; background: var(--danger-bg); color: var(--danger); }

/* Badges */
.badge {
  display: inline-block; padding: 0.25rem 0.6rem; border-radius: 999px;
  font-size: 0.72rem; font-weight: 600; line-height: 1.4;
}
.badge-open { background: var(--danger-bg); color: var(--danger); }
.badge-progress { background: var(--warning-bg); color: var(--warning); }
.badge-resolved { background: var(--success-bg); color: var(--success); }
.badge-high { background: var(--danger-bg); color: var(--danger); }
.badge-medium { background: var(--warning-bg); color: var(--warning); }
.badge-low { background: var(--bg-tertiary); color: var(--text-secondary); }

/* Summary cards */
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2rem; }
.summary-card {
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 1rem 1.5rem;
  display: flex; align-items: center; gap: 1rem; box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--text-secondary);
}
.summary-card .icon { font-size: 1.5rem; color: var(--text-secondary); }
.summary-card .label { color: var(--text-secondary); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.25rem; }
.summary-card .value { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); line-height: 1; }
.summary-card.accent { border-left-color: var(--accent-primary); } .summary-card.accent .icon { color: var(--accent-primary); }
.summary-card.warning { border-left-color: var(--warning); } .summary-card.warning .icon { color: var(--warning); }
.summary-card.success { border-left-color: var(--success); } .summary-card.success .icon { color: var(--success); }

/* Search bar */
.search-bar {
  display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem;
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 0.75rem 1rem; box-shadow: var(--shadow-sm);
}
.search-bar input {
  flex: 1; border: none; background: transparent; color: var(--text-primary);
  outline: none; font-size: 0.95rem; font-family: inherit;
}
.search-bar i { color: var(--text-secondary); }

/* Table */
.table-container {
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
}
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
thead { background: var(--bg-tertiary); }
thead th { text-align: left; padding: 0.85rem 1.25rem; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); font-weight: 600; }
tbody td { padding: 0.85rem 1.25rem; font-size: 0.875rem; border-top: 1px solid var(--border-color); }
tbody tr:hover { background: var(--bg-tertiary); }

/* Pagination */
.pagination-controls { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; margin-top: 1.5rem; }
.pagination-info { color: var(--text-secondary); font-size: 0.875rem; }
.pagination-buttons { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; justify-content: center; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.5);
  display: none; align-items: center; justify-content: center; padding: 1rem; z-index: 100;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  width: 100%; max-width: 700px; max-height: 90vh; overflow-y: auto; padding: 2rem;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.modal-close { background: none; border: none; font-size: 1.25rem; color: var(--text-secondary); cursor: pointer; }
.modal-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 2rem; border-top: 1px solid var(--border-color); padding-top: 1.5rem; }

/* Attachments */
.attachment-item {
  display: flex; align-items: center; gap: 0.75rem; padding: 0.5rem;
  border: 1px solid var(--border-color); border-radius: var(--radius-md); margin-bottom: 0.5rem;
}
.attachment-item img { width: 48px; height: 48px; object-fit: cover; border-radius: var(--radius-sm); border: 1px solid var(--border-color); }
.attachment-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-primary); text-decoration: none; }
.attachment-link { color: var(--accent-primary); text-decoration: none; }
.attachment-link:hover { text-decoration: underline; }

/* Status page */
.status-card {
  max-width: 760px; margin: 2rem auto; background: var(--bg-secondary);
  border: 1px solid var(--border-color); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 2.5rem;
}
.status-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 2rem; }
.status-badge { display: inline-block; padding: 0.35rem 0.9rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; white-space: nowrap; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.detail-item label { display: block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); margin-bottom: 0.25rem; }
.ticket-description { background: var(--bg-tertiary); border-radius: var(--radius-md); padding: 1.25rem; font-size: 0.925rem; white-space: pre-wrap; }
.loading-state, .error-state { text-align: center; padding: 3rem 1rem; color: var(--text-secondary); }
.error-state h2 { margin-bottom: 0.5rem; }
.error-state i { font-size: 3rem; margin-bottom: 1rem; color: var(--danger); }

/* Misc */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.empty-state { text-align: center; padding: 3rem; color: var(--text-secondary); }
.demo-banner {
  background: var(--accent-primary); color: var(--text-inverse); text-align: center;
  padding: 0.5rem 1rem; font-size: 0.8rem; font-weight: 500;
}

@media (max-width: 768px) {
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .nav-content { padding: 0 1rem; }
}