/* ConstructionFlow — Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a1f35;
  --bg-card-hover: #222845;
  --bg-input: #1e2440;
  --border: #2a3150;
  --border-focus: #6366f1;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99,102,241,.25);
  --success: #22c55e;
  --success-bg: rgba(34,197,94,.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245,158,11,.12);
  --danger: #ef4444;
  --danger-bg: rgba(239,68,68,.12);
  --info: #3b82f6;
  --info-bg: rgba(59,130,246,.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.4);
  --transition: all .2s cubic-bezier(.4,0,.2,1);
  --sidebar-w: 260px;
  --header-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }

/* Layout */
.app-layout { display: flex; min-height: 100vh; }
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  z-index: 50;
  transition: transform .3s ease;
}
.sidebar-brand {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}
.sidebar-brand .brand-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: white;
}
.sidebar-brand h1 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); }
.sidebar-brand span { font-size: .7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.nav-section { margin-bottom: 24px; }
.nav-section-title {
  font-size: .65rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--text-muted);
  padding: 0 12px; margin-bottom: 8px;
}
.nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: .875rem; font-weight: 500;
  transition: var(--transition); position: relative;
}
.nav-link:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-link.active {
  background: var(--accent-glow); color: var(--accent);
  font-weight: 600;
}
.nav-link.active::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 20px; background: var(--accent); border-radius: 2px;
}
.nav-link svg { width: 20px; height: 20px; flex-shrink: 0; }
.nav-badge {
  margin-left: auto; background: var(--danger);
  color: white; font-size: .7rem; font-weight: 600;
  padding: 2px 7px; border-radius: 10px; min-width: 20px; text-align: center;
}

/* Main Content */
.main-content {
  margin-left: var(--sidebar-w); flex: 1;
  display: flex; flex-direction: column; min-height: 100vh;
}
.top-header {
  height: var(--header-h); background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(12px);
}
.page-title-section h2 { font-size: 1.25rem; font-weight: 700; }
.page-title-section p { font-size: .8rem; color: var(--text-muted); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.content-area { flex: 1; padding: 32px; }

/* User avatar */
.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 700; color: white;
  background: linear-gradient(135deg, var(--accent), #a855f7);
}

/* Cards */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: var(--transition);
}
.card:hover { border-color: var(--border-focus); }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-title { font-size: 1rem; font-weight: 600; }

/* KPI Cards */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 32px; }
.kpi-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  position: relative; overflow: hidden; transition: var(--transition);
}
.kpi-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--border-focus); }
.kpi-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: linear-gradient(90deg, var(--accent), #a855f7);
}
.kpi-card.warning::before { background: linear-gradient(90deg, var(--warning), #f97316); }
.kpi-card.success::before { background: linear-gradient(90deg, var(--success), #34d399); }
.kpi-card.danger::before { background: linear-gradient(90deg, var(--danger), #f87171); }
.kpi-card.info::before { background: linear-gradient(90deg, var(--info), #60a5fa); }
.kpi-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; font-size: 1.25rem;
}
.kpi-icon.accent { background: var(--accent-glow); color: var(--accent); }
.kpi-icon.warning { background: var(--warning-bg); color: var(--warning); }
.kpi-icon.success { background: var(--success-bg); color: var(--success); }
.kpi-icon.danger { background: var(--danger-bg); color: var(--danger); }
.kpi-icon.info { background: var(--info-bg); color: var(--info); }
.kpi-value { font-size: 1.75rem; font-weight: 800; line-height: 1.2; }
.kpi-label { font-size: .8rem; color: var(--text-muted); margin-top: 4px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 600; border: none;
  cursor: pointer; transition: var(--transition);
  font-family: inherit; text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white; box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); color: white; }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.btn-danger { background: var(--danger); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-warning { background: var(--warning); color: #1a1a1a; }
.btn-sm { padding: 6px 14px; font-size: .8rem; }
.btn-icon { padding: 8px; }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { background: var(--bg-card); color: var(--text-primary); }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: .8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: .875rem; font-family: inherit;
  transition: var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-textarea { min-height: 100px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Tables */
.table-container { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th {
  padding: 12px 16px; text-align: left;
  font-size: .75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .5px; color: var(--text-muted);
  background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}
td {
  padding: 14px 16px; border-bottom: 1px solid var(--border);
  font-size: .875rem; vertical-align: middle;
}
tr:hover td { background: var(--bg-card-hover); }
tr:last-child td { border-bottom: none; }

/* Badges / Status */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 20px;
  font-size: .7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .5px;
}
.badge-draft { background: var(--bg-card-hover); color: var(--text-secondary); }
.badge-dispatched, .badge-sent { background: var(--info-bg); color: var(--info); }
.badge-in_progress, .badge-in-progress { background: var(--warning-bg); color: var(--warning); }
.badge-completed, .badge-accepted, .badge-paid, .badge-resolved { background: var(--success-bg); color: var(--success); }
.badge-closed { background: rgba(107,114,128,.15); color: #9ca3af; }
.badge-critical, .badge-overdue, .badge-rejected { background: var(--danger-bg); color: var(--danger); }
.badge-open { background: var(--accent-glow); color: var(--accent); }
.badge-low { background: var(--success-bg); color: var(--success); }
.badge-medium { background: var(--warning-bg); color: var(--warning); }
.badge-high { background: rgba(249,115,22,.12); color: #f97316; }

/* Tabs / Filters */
.tab-filters { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 24px; padding: 4px; background: var(--bg-secondary); border-radius: var(--radius-sm); }
.tab-btn {
  padding: 8px 16px; border-radius: 6px; border: none;
  background: transparent; color: var(--text-secondary);
  font-size: .8rem; font-weight: 500; cursor: pointer;
  transition: var(--transition); font-family: inherit;
}
.tab-btn:hover { background: var(--bg-card); color: var(--text-primary); }
.tab-btn.active { background: var(--accent); color: white; font-weight: 600; }
.tab-count { font-size: .7rem; opacity: .7; margin-left: 4px; }

/* Progress Bar */
.progress-bar {
  height: 6px; background: var(--bg-secondary);
  border-radius: 3px; overflow: hidden;
}
.progress-fill {
  height: 100%; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), #a855f7);
  transition: width .5s ease;
}

/* Flash Messages */
.flash-container { padding: 0 32px; padding-top: 16px; }
.flash {
  padding: 12px 20px; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 500;
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 12px; animation: slideDown .3s ease;
}
.flash-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(34,197,94,.2); }
.flash-error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239,68,68,.2); }
.flash-info { background: var(--info-bg); color: var(--info); border: 1px solid rgba(59,130,246,.2); }

/* Empty State */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state svg { width: 64px; height: 64px; margin-bottom: 16px; opacity: .4; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { font-size: .875rem; margin-bottom: 24px; }

/* Detail Page */
.detail-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 32px; flex-wrap: wrap; gap: 16px; }
.detail-title { font-size: 1.5rem; font-weight: 800; }
.detail-meta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
.detail-meta span { font-size: .8rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }
.detail-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; }
.detail-section { margin-bottom: 24px; }
.detail-section h3 { font-size: .9rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 12px; }
.detail-field { margin-bottom: 12px; }
.detail-field label { font-size: .75rem; color: var(--text-muted); display: block; }
.detail-field p { font-size: .9rem; color: var(--text-primary); }

/* Stats row */
.stats-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; text-align: center; }
.stat-value { font-size: 1.3rem; font-weight: 700; }
.stat-label { font-size: .75rem; color: var(--text-muted); }

/* Ticket Messages */
.message-thread { display: flex; flex-direction: column; gap: 16px; }
.message-bubble {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.message-header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.message-author { font-size: .8rem; font-weight: 600; }
.message-time { font-size: .7rem; color: var(--text-muted); }
.message-body { font-size: .875rem; line-height: 1.7; }

/* Charts area */
.chart-container { position: relative; height: 280px; }

/* Animations */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.animate-in { animation: fadeIn .4s ease; }

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none; background: none; border: none;
  color: var(--text-primary); cursor: pointer; padding: 8px;
}
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.6); z-index: 45;
}

/* Login Page */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg-primary);
  background-image: radial-gradient(circle at 20% 50%, rgba(99,102,241,.08) 0%, transparent 50%),
                    radial-gradient(circle at 80% 50%, rgba(168,85,247,.08) 0%, transparent 50%);
}
.login-card {
  width: 100%; max-width: 420px; padding: 40px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
}
.login-brand { text-align: center; margin-bottom: 32px; }
.login-brand .brand-icon {
  width: 56px; height: 56px; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius); display: flex; align-items: center;
  justify-content: center; font-size: 1.5rem; font-weight: 800; color: white;
}
.login-brand h1 { font-size: 1.5rem; font-weight: 800; }
.login-brand p { font-size: .8rem; color: var(--text-muted); margin-top: 4px; }

/* Action bar */
.action-bar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; margin-bottom: 24px;
}
.search-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 14px; min-width: 240px;
}
.search-box input {
  background: transparent; border: none; color: var(--text-primary);
  font-size: .875rem; outline: none; width: 100%; font-family: inherit;
}
.search-box svg { width: 16px; height: 16px; color: var(--text-muted); }

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

/* Responsive */
@media (max-width: 1024px) {
  .detail-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.active { display: block; }
  .mobile-toggle { display: block; }
  .main-content { margin-left: 0; }
  .content-area { padding: 16px; }
  .top-header { padding: 0 16px; }
  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .form-row { grid-template-columns: 1fr; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .action-bar { flex-direction: column; align-items: stretch; }
  .search-box { min-width: unset; }
  .tab-filters { overflow-x: auto; flex-wrap: nowrap; }
  .detail-header { flex-direction: column; }
  .stats-row { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .kpi-card { padding: 16px; }
}