/* LiveBill GST Software - Official Asset Stylesheet
 * Palette: White Canvas (#FFFFFF), Surface (#F8FAFC), Dark Slate (#0F172A)
 * Accents: Indian Kesariya (#FF671F), Royal Purple (#6A1B9A), Sky Blue (#0284C7)
 */

:root {
  --bg-canvas: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-sidebar: #FFFFFF;
  --bg-header: #FFFFFF;

  --primary-slate: #0F172A;
  --primary-slate-hover: #1E293B;

  --kesariya: #FF671F;
  --kesariya-hover: #E55A16;
  --kesariya-light: #FFF7ED;

  --purple: #6A1B9A;
  --purple-hover: #581682;
  --purple-light: #F3E8FF;

  --sky: #0284C7;
  --sky-hover: #0369A1;
  --sky-light: #E0F2FE;

  --success: #16A34A;
  --success-light: #DCFCE7;
  --warning: #D97706;
  --warning-light: #FEF3C7;
  --danger: #DC2626;
  --danger-light: #FEE2E2;

  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-subtle: #94A3B8;

  --border-light: #E2E8F0;
  --border-medium: #CBD5E1;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 12px 28px -6px rgba(15, 23, 42, 0.1), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

.app-sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.sidebar-brand {
  padding: 20px 24px;
  border-bottom: 2px solid var(--kesariya-light);
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--purple-light);
  color: var(--purple);
  border: 1px solid rgba(106, 27, 154, 0.2);
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
}

.brand-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-slate);
  letter-spacing: -0.5px;
}
.brand-title span {
  color: var(--kesariya);
}

.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.15s ease;
  margin-bottom: 4px;
  cursor: pointer;
}

.nav-item:hover {
  background-color: var(--bg-canvas);
  color: var(--primary-slate);
}

.nav-item.active {
  background-color: var(--primary-slate);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.nav-item.active .nav-icon {
  color: #FFFFFF;
}

.nav-icon {
  font-size: 18px;
  width: 22px;
  text-align: center;
}

.app-main {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.app-topbar {
  height: 64px;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.topbar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-slate);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--purple);
  color: #FFFFFF;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

/* Page Content Area */
.content-area {
  padding: 28px;
  flex: 1;
}

/* Cards & Containers */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 24px;
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-slate);
}

/* Dashboard Metric Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-slate);
}

.stat-subtext {
  font-size: 12px;
  color: var(--text-subtle);
  margin-top: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

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

.btn-kesariya {
  background-color: var(--kesariya);
  color: #FFFFFF;
}
.btn-kesariya:hover {
  background-color: var(--kesariya-hover);
}

.btn-purple {
  background-color: var(--purple);
  color: #FFFFFF;
}
.btn-purple:hover {
  background-color: var(--purple-hover);
}

.btn-sky {
  background-color: var(--sky);
  color: #FFFFFF;
}
.btn-sky:hover {
  background-color: var(--sky-hover);
}

.btn-outline {
  background-color: #FFFFFF;
  border-color: var(--border-medium);
  color: var(--text-main);
}
.btn-outline:hover {
  background-color: var(--bg-canvas);
  border-color: var(--primary-slate);
}

.btn-danger {
  background-color: var(--danger);
  color: #FFFFFF;
}
.btn-danger:hover {
  background-color: #B91C1C;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* Form Controls */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-main);
  background-color: #FFFFFF;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
  border-color: var(--sky);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

/* Data Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  background-color: var(--bg-canvas);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
  vertical-align: middle;
}

.data-table tr:hover td {
  background-color: #F1F5F9;
}

/* Status Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-active { background-color: var(--success-light); color: var(--success); }
.badge-warning { background-color: var(--warning-light); color: var(--warning); }
.badge-danger { background-color: var(--danger-light); color: var(--danger); }
.badge-purple { background-color: var(--purple-light); color: var(--purple); }
.badge-sky { background-color: var(--sky-light); color: var(--sky); }

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid var(--border-light);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  background-color: var(--bg-canvas);
}