/* ==========================================================================
   Kuberam Infotech - Modern Leave Management Application Stylesheet
   Framework: Bootstrap 5.3.3 + CSS Custom Properties (Variables)
   ========================================================================== */

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

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;

  /* Brand Palette */
  --kuberam-blue: #2563eb;
  --kuberam-blue-hover: #1d4ed8;
  --kuberam-navy: #0f172a;
  --kuberam-gold: #f59e0b;
  --kuberam-emerald: #10b981;
  --kuberam-rose: #ef4444;
  --kuberam-indigo: #6366f1;

  /* Light Theme Defaults */
  --app-bg: #f8fafc;
  --app-surface: #ffffff;
  --app-surface-hover: #f1f5f9;
  --app-text: #0f172a;
  --app-text-muted: #64748b;
  --app-border: #e2e8f0;
  --app-border-subtle: #f1f5f9;
  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-hover: rgba(255, 255, 255, 0.06);
  --sidebar-active-bg: #2563eb;
  --topbar-bg: rgba(255, 255, 255, 0.95);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

  --bs-body-color: var(--app-text);
  --bs-body-bg: var(--app-bg);
}

[data-bs-theme="dark"] {
  --app-bg: #0b0f17;
  --app-surface: #161e2e;
  --app-surface-hover: #1f293d;
  --app-text: #f8fafc;
  --app-text-muted: #94a3b8;
  --app-border: #26334d;
  --app-border-subtle: #1e293b;
  --sidebar-bg: #0d131f;
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;
  --sidebar-hover: rgba(255, 255, 255, 0.08);
  --sidebar-active-bg: #2563eb;
  --topbar-bg: rgba(22, 30, 46, 0.95);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);

  --bs-body-color: var(--app-text);
  --bs-body-bg: var(--app-bg);
  --bs-secondary-color: var(--app-text-muted);
  --bs-border-color: var(--app-border);
}

/* Global Reset & Typography */
body {
  font-family: var(--font-sans);
  background-color: var(--app-bg) !important;
  color: var(--app-text) !important;
  min-height: 100vh;
  margin: 0;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--app-text) !important;
}

p, span, label, div {
  color: inherit;
}

.text-muted {
  color: var(--app-text-muted) !important;
}

/* Kuberam Brand Logo Styling */
.brand-logo-full {
  height: 42px;
  max-width: 100%;
  object-fit: contain;
  transition: transform 0.2s ease;
}

.brand-logo-icon {
  height: 38px;
  width: 38px;
  object-fit: contain;
}

.auth-logo {
  max-height: 54px;
  width: auto;
  object-fit: contain;
  transition: filter 0.2s ease;
}

[data-bs-theme="dark"] .auth-logo {
  filter: invert(1) hue-rotate(180deg) brightness(1.15) contrast(1.05);
}

/* Main Layout Structure */
#app-wrapper {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Sidebar Styles */
#app-sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1040;
}

#app-sidebar.collapsed {
  width: 78px;
}

#app-sidebar .sidebar-brand-icon {
  display: none;
}

#app-sidebar .sidebar-header {
  height: 70px;
  padding: 0.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#app-sidebar.collapsed .sidebar-header {
  height: 70px !important;
  padding: 0 !important;
  flex-direction: row !important;
  align-items: center !important;
  justify-content: center !important;
}

#app-sidebar.collapsed .sidebar-brand-text {
  display: none !important;
}

#app-sidebar.collapsed .sidebar-brand-icon {
  display: block !important;
  margin: 0 auto;
}

#app-sidebar.collapsed .nav-header {
  display: none !important;
}

#app-sidebar .sidebar-nav {
  list-style: none;
  padding: 1rem 0.75rem;
  margin: 0;
  flex-grow: 1;
}

#app-sidebar .nav-item {
  margin-bottom: 0.25rem;
}

#app-sidebar .nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: var(--sidebar-text);
  font-weight: 500;
  font-size: 0.925rem;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

#app-sidebar .nav-link i {
  font-size: 1.2rem;
  margin-right: 0.85rem;
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

#app-sidebar.collapsed .nav-link {
  justify-content: center;
  padding: 0.75rem 0.5rem;
}

#app-sidebar.collapsed .nav-link span,
#app-sidebar.collapsed .badge-count {
  display: none !important;
}

#app-sidebar.collapsed .nav-link i {
  margin-right: 0 !important;
}

#app-sidebar .nav-link:hover {
  color: var(--sidebar-text-active);
  background-color: var(--sidebar-hover);
}

#app-sidebar .nav-link.active {
  color: #ffffff !important;
  background-color: var(--sidebar-active-bg);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

#app-sidebar .badge-count {
  margin-left: auto;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
}

#app-sidebar.collapsed .badge-count {
  display: none;
}

/* Main Content & Topbar */
#app-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

#app-topbar {
  height: 70px;
  background-color: var(--topbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--app-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 1030;
}

#app-content {
  padding: 1.75rem 1.5rem;
  flex-grow: 1;
}

/* Cards & Surface Components */
.card-modern {
  background-color: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  border-radius: 0.875rem;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  overflow: hidden;
  color: var(--app-text) !important;
}

.card-modern:hover {
  box-shadow: var(--card-shadow-hover);
}

.card-modern .card-header-modern {
  padding: 1.25rem 1.5rem;
  background-color: transparent;
  border-bottom: 1px solid var(--app-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-modern .card-body-modern {
  padding: 1.5rem;
}

/* KPI Stat Cards */
.stat-card {
  padding: 1.5rem;
  border-radius: 0.875rem;
  background-color: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  box-shadow: var(--card-shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-icon.primary { background: rgba(37, 99, 235, 0.15); color: var(--kuberam-blue); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.15); color: var(--kuberam-gold); }
.stat-icon.success { background: rgba(16, 185, 129, 0.15); color: var(--kuberam-emerald); }
.stat-icon.danger { background: rgba(239, 68, 68, 0.15); color: var(--kuberam-rose); }
.stat-icon.indigo { background: rgba(99, 102, 241, 0.15); color: var(--kuberam-indigo); }

.stat-val {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0.25rem;
  color: var(--app-text) !important;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--app-text-muted) !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Modern Leave Type Visual Selector */
.leave-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.leave-type-option {
  position: relative;
  cursor: pointer;
  margin: 0;
}

.leave-type-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.leave-type-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 0.75rem;
  border-radius: 0.75rem;
  background-color: var(--app-surface-hover);
  border: 2px solid var(--app-border);
  text-align: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.leave-type-option:hover .leave-type-card {
  border-color: var(--kuberam-blue);
  transform: translateY(-2px);
}

.leave-type-option input[type="radio"]:checked + .leave-type-card {
  border-color: var(--kuberam-blue);
  background-color: rgba(37, 99, 235, 0.08);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

[data-bs-theme="dark"] .leave-type-option input[type="radio"]:checked + .leave-type-card {
  background-color: rgba(37, 99, 235, 0.2);
  border-color: #60a5fa;
}

.leave-type-card .lt-icon {
  font-size: 1.5rem;
  margin-bottom: 0.35rem;
  color: var(--kuberam-blue);
  transition: transform 0.2s ease;
}

.leave-type-option input[type="radio"]:checked + .leave-type-card .lt-icon {
  transform: scale(1.15);
}

.leave-type-card .lt-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--app-text) !important;
}

.leave-type-check {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 0.9rem;
  color: var(--kuberam-blue);
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.2s ease;
}

.leave-type-option input[type="radio"]:checked + .leave-type-card .leave-type-check {
  opacity: 1;
  transform: scale(1);
}

/* Status Pill Badges */
.badge-status {
  padding: 0.35em 0.85em;
  font-size: 0.775rem;
  font-weight: 600;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-transform: capitalize;
}

.badge-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
}

.badge-status.approved, .badge-status.success {
  background-color: rgba(16, 185, 129, 0.15);
  color: #059669 !important;
}
[data-bs-theme="dark"] .badge-status.approved, [data-bs-theme="dark"] .badge-status.success {
  color: #34d399 !important;
}

.badge-status.pending, .badge-status.warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: #d97706 !important;
}
[data-bs-theme="dark"] .badge-status.pending, [data-bs-theme="dark"] .badge-status.warning {
  color: #fbbf24 !important;
}

.badge-status.recommended, .badge-status.info {
  background-color: rgba(37, 99, 235, 0.15);
  color: #2563eb !important;
}
[data-bs-theme="dark"] .badge-status.recommended, [data-bs-theme="dark"] .badge-status.info {
  color: #60a5fa !important;
}

.badge-status.rejected, .badge-status.danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: #dc2626 !important;
}
[data-bs-theme="dark"] .badge-status.rejected, [data-bs-theme="dark"] .badge-status.danger {
  color: #f87171 !important;
}

/* Modern Tables */
.table-responsive-modern {
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--app-border);
}

.table-modern {
  width: 100%;
  margin-bottom: 0;
  color: var(--app-text) !important;
  vertical-align: middle;
  border-collapse: separate;
  border-spacing: 0;
}

.table-modern th {
  background-color: var(--app-border-subtle) !important;
  color: var(--app-text-muted) !important;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--app-border);
}

.table-modern td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--app-border);
  background-color: var(--app-surface) !important;
  color: var(--app-text) !important;
  font-size: 0.9rem;
  transition: background-color 0.15s ease;
}

.table-modern tr:last-child td {
  border-bottom: none;
}

.table-modern tbody tr:hover td {
  background-color: var(--app-surface-hover) !important;
}

/* Empty States */
.empty-state {
  padding: 3.5rem 1.5rem;
  text-align: center;
}

.empty-state-icon {
  font-size: 3.5rem;
  color: var(--app-text-muted) !important;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.empty-state-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--app-text) !important;
  margin-bottom: 0.5rem;
}

.empty-state-desc {
  color: var(--app-text-muted) !important;
  max-width: 420px;
  margin: 0 auto 1.5rem;
  font-size: 0.9rem;
}

/* Form Controls & Modal Contrast Overrides */
.form-label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--app-text) !important;
  margin-bottom: 0.4rem;
}

.form-control, .form-select {
  background-color: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  color: var(--app-text) !important;
  border-radius: 0.5rem;
  padding: 0.65rem 0.9rem;
  font-size: 0.9rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* Universal Select Option Color & Contrast Fix */
select option, .form-select option {
  background-color: #ffffff !important;
  color: #0f172a !important;
  padding: 0.5rem 0.75rem;
}

select option:disabled, .form-select option:disabled {
  color: #94a3b8 !important;
  background-color: #f1f5f9 !important;
}

[data-bs-theme="dark"] select option, 
[data-bs-theme="dark"] .form-select option {
  background-color: #161e2e !important;
  color: #f8fafc !important;
}

[data-bs-theme="dark"] select option:disabled, 
[data-bs-theme="dark"] .form-select option:disabled {
  color: #64748b !important;
  background-color: #0f172a !important;
}

.form-control::placeholder {
  color: var(--app-text-muted) !important;
  opacity: 0.7;
}

.form-control:focus, .form-select:focus {
  background-color: var(--app-surface) !important;
  border-color: var(--kuberam-blue) !important;
  color: var(--app-text) !important;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2) !important;
}

.dropdown-menu {
  background-color: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  color: var(--app-text) !important;
}

.dropdown-item {
  color: var(--app-text) !important;
}

.dropdown-item:hover {
  background-color: var(--app-surface-hover) !important;
  color: var(--kuberam-blue) !important;
}

.modal-content {
  background-color: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  color: var(--app-text) !important;
}

.list-group-item {
  background-color: var(--app-surface) !important;
  border-color: var(--app-border) !important;
  color: var(--app-text) !important;
}

.list-group-item:hover {
  background-color: var(--app-surface-hover) !important;
}

.btn-primary-kuberam {
  background-color: var(--kuberam-blue);
  border-color: var(--kuberam-blue);
  color: #ffffff !important;
  font-weight: 500;
  border-radius: 0.5rem;
  padding: 0.65rem 1.25rem;
  transition: all 0.2s ease;
}

.btn-primary-kuberam:hover, .btn-primary-kuberam:focus {
  background-color: var(--kuberam-blue-hover);
  border-color: var(--kuberam-blue-hover);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Auth / Login Page Layout */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.18), transparent 65%), var(--app-bg) !important;
  padding: 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  border-radius: 1.25rem;
  box-shadow: var(--card-shadow-hover);
  padding: 2.5rem 2rem;
  color: var(--app-text) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  animation: fadeInUp 0.35s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Modern Auth Input Icons & Floating Elements */
.input-icon-wrapper {
  position: relative;
  width: 100%;
}

.input-icon-wrapper .input-icon {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.15rem;
  color: var(--app-text-muted);
  pointer-events: none;
  transition: color 0.2s ease;
  z-index: 5;
}

.form-control-modern {
  background-color: var(--app-surface) !important;
  border: 1.5px solid var(--app-border) !important;
  color: var(--app-text) !important;
  border-radius: 0.65rem !important;
  font-size: 0.95rem;
  transition: all 0.2s ease-in-out;
}

.form-control-modern::placeholder {
  color: var(--app-text-muted) !important;
  opacity: 0.65;
  font-size: 0.9rem;
}

.form-control-modern:focus {
  background-color: var(--app-surface) !important;
  border-color: var(--kuberam-blue) !important;
  box-shadow: 0 0 0 3.5px rgba(37, 99, 235, 0.18) !important;
}

.input-icon-wrapper:focus-within .input-icon {
  color: var(--kuberam-blue) !important;
}

/* Password Toggle Button */
.password-toggle-btn {
  z-index: 6;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--app-text-muted) !important;
  transition: color 0.2s ease;
}

.password-toggle-btn:hover {
  color: var(--kuberam-blue) !important;
}

/* Auth Link Styling */
.auth-link {
  transition: color 0.2s ease, opacity 0.2s ease;
}

.auth-link:hover {
  text-decoration: underline !important;
  opacity: 0.9;
}

/* FullCalendar Modern Tweaks */
.fc {
  --fc-border-color: var(--app-border);
  --fc-page-bg-color: var(--app-surface);
  --fc-neutral-bg-color: var(--app-border-subtle);
  --fc-list-event-hover-bg-color: var(--app-surface-hover);
  --fc-theme-standard-border-color: var(--app-border);
  font-family: var(--font-sans);
  color: var(--app-text) !important;
}

.fc .fc-toolbar-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--app-text) !important;
}

.fc .fc-button-primary {
  background-color: var(--kuberam-blue);
  border-color: var(--kuberam-blue);
  border-radius: 0.4rem;
}

.fc .fc-button-primary:hover {
  background-color: var(--kuberam-blue-hover);
  border-color: var(--kuberam-blue-hover);
}

/* Responsive Utilities */
@media (max-width: 991.98px) {
  #app-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: -270px;
  }
  #app-sidebar.show-mobile {
    left: 0;
    box-shadow: 0 0 25px rgba(0,0,0,0.5);
  }
  #app-sidebar.collapsed {
    width: 260px;
  }
  #app-sidebar.collapsed .sidebar-brand-text {
    display: block;
  }
  #app-sidebar.collapsed .nav-link span {
    display: inline;
  }
  #app-topbar {
    padding: 0 1rem;
  }
  #app-content {
    padding: 1.25rem 1rem;
  }
}