/* ========================================
   Helpdesk System - Shared Styles
   ======================================== */

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-50: #e0e7ff;
  --secondary: #0ea5e9;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #6366f1;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --sidebar-width: 260px;
  --header-height: 64px;
  --radius: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --transition: all 0.2s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.5;
  font-size: 14px;
}

/* ---- Layout ---- */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--gray-900);
  color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.sidebar-brand {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-brand svg { flex-shrink: 0; }

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}

.nav-section-title {
  padding: 16px 20px 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray-500);
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  color: var(--gray-400);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  color: #fff;
  background: rgba(255,255,255,0.05);
}

.nav-item.active {
  color: #fff;
  background: rgba(79,70,229,0.2);
  border-left-color: var(--primary);
}

.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; }

.nav-item .badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-footer .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
}

.sidebar-footer .user-info { flex: 1; min-width: 0; }
.sidebar-footer .user-name { font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-footer .user-role { font-size: 12px; color: var(--gray-500); }

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
}

/* ---- Header ---- */
.header {
  height: var(--header-height);
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-left { display: flex; align-items: center; gap: 16px; }
.header-right { display: flex; align-items: center; gap: 16px; }

.page-title { font-size: 18px; font-weight: 700; color: var(--gray-900); }
.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--gray-500); }
.breadcrumb a { color: var(--primary); text-decoration: none; }

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 8px 14px;
  width: 280px;
}

.header-search input {
  border: none;
  background: none;
  outline: none;
  font-size: 13px;
  width: 100%;
  color: var(--gray-700);
}

.header-search svg { color: var(--gray-400); flex-shrink: 0; }

.icon-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}

.icon-btn:hover { background: var(--gray-100); color: var(--gray-700); }
.icon-btn .dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  border: 2px solid #fff;
}

/* ---- Page Content ---- */
.page-content { padding: 24px; }

/* ---- Cards ---- */
.card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title { font-size: 15px; font-weight: 600; color: var(--gray-900); }
.card-body { padding: 20px; }

/* ---- Stat Cards ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.stat-value { font-size: 28px; font-weight: 700; color: var(--gray-900); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--gray-500); margin-top: 4px; }
.stat-change { font-size: 12px; margin-top: 8px; font-weight: 500; display: flex; align-items: center; gap: 4px; }
.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon.blue { background: #dbeafe; color: #2563eb; }
.stat-icon.green { background: #d1fae5; color: #059669; }
.stat-icon.amber { background: #fef3c7; color: #d97706; }
.stat-icon.red { background: #fee2e2; color: #dc2626; }
.stat-icon.purple { background: #ede9fe; color: #7c3aed; }

/* ---- Tables ---- */
.table-wrapper { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-500);
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  white-space: nowrap;
}

td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--gray-100);
  font-size: 14px;
  vertical-align: middle;
}

tr:hover td { background: var(--gray-50); }

/* ---- Badges ---- */
.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-status .dot-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge-open { background: #dbeafe; color: #1e40af; }
.badge-open .dot-indicator { background: #2563eb; }

.badge-progress { background: #fef3c7; color: #92400e; }
.badge-progress .dot-indicator { background: #d97706; }

.badge-pending { background: #fce7f3; color: #9d174d; }
.badge-pending .dot-indicator { background: #db2777; }

.badge-resolved { background: #d1fae5; color: #065f46; }
.badge-resolved .dot-indicator { background: #059669; }

.badge-closed { background: var(--gray-100); color: var(--gray-600); }
.badge-closed .dot-indicator { background: var(--gray-400); }

.badge-priority {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.priority-urgent { background: #fee2e2; color: #991b1b; }
.priority-high { background: #ffedd5; color: #9a3412; }
.priority-medium { background: #fef9c3; color: #854d0e; }
.priority-low { background: #ecfdf5; color: #065f46; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary { background: #fff; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-secondary:hover { background: var(--gray-50); }

.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }

.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-xs { padding: 4px 8px; font-size: 12px; }

/* ---- Forms ---- */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--gray-800);
  background: #fff;
  transition: var(--transition);
  outline: none;
  font-family: inherit;
}

.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }

textarea.form-control { min-height: 100px; resize: vertical; }

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 36px;
}

/* ---- Filters Bar ---- */
.filters-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-group label { font-size: 13px; color: var(--gray-600); font-weight: 500; white-space: nowrap; }

.filter-select {
  padding: 7px 32px 7px 10px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 13px;
  background: #fff;
  color: var(--gray-700);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  outline: none;
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  gap: 0;
  margin-bottom: 20px;
}

.tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.tab:hover { color: var(--gray-700); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.tab .count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-200);
  color: var(--gray-600);
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 6px;
}

.tab.active .count { background: var(--primary-50); color: var(--primary); }

/* ---- Pagination ---- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-top: 1px solid var(--gray-200);
}

.pagination-info { font-size: 13px; color: var(--gray-500); }

.pagination-btns {
  display: flex;
  gap: 4px;
}

.page-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  background: #fff;
  color: var(--gray-600);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
}

.page-btn:hover { background: var(--gray-50); }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Avatar ---- */
.avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}

/* ---- Ticket Detail ---- */
.ticket-conversation { display: flex; flex-direction: column; gap: 16px; }

.message-bubble {
  max-width: 80%;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.6;
}

.message-staff {
  align-self: flex-start;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 4px 12px 12px 12px;
}

.message-customer {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-radius: 12px 4px 12px 12px;
}

.message-meta {
  font-size: 12px;
  color: var(--gray-400);
  margin-top: 6px;
}

.message-customer .message-meta { color: rgba(255,255,255,0.7); }

/* ---- Grid layouts ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }

/* ---- Utilities ---- */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.text-muted { color: var(--gray-500); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---- Login Page ---- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.login-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  padding: 40px;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo h1 { font-size: 24px; font-weight: 700; color: var(--gray-900); margin-top: 12px; }
.login-logo p { font-size: 14px; color: var(--gray-500); margin-top: 4px; }

.login-card .btn-primary { width: 100%; justify-content: center; padding: 12px; font-size: 15px; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr; }
  .filters-bar { flex-direction: column; align-items: stretch; }
  .header-search { display: none; }
}