:root {
  --ph-body-bg: #f5f7fb;
  --ph-surface: #ffffff;
  --ph-surface-2: #f8fafc;
  --ph-text: #172033;
  --ph-text-muted: #6b7280;
  --ph-border: #e5e7eb;
  --ph-primary: #2563eb;
  --ph-primary-hover: #1d4ed8;
  --ph-success: #16a34a;
  --ph-warning: #d97706;
  --ph-danger: #dc2626;
  --ph-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --ph-shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.06);
  --ph-radius: 1rem;
  --ph-radius-sm: 0.75rem;
  --ph-navbar-bg: rgba(255, 255, 255, 0.9);
  --ph-footer-bg: #0f172a;
  --ph-footer-text: #cbd5e1;
}

[data-theme="dark"] {
  --ph-body-bg: #0b1220;
  --ph-surface: #111827;
  --ph-surface-2: #0f172a;
  --ph-text: #e5eefb;
  --ph-text-muted: #9ca3af;
  --ph-border: #243041;
  --ph-primary: #60a5fa;
  --ph-primary-hover: #3b82f6;
  --ph-success: #22c55e;
  --ph-warning: #f59e0b;
  --ph-danger: #f87171;
  --ph-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
  --ph-shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.22);
  --ph-navbar-bg: rgba(11, 18, 32, 0.88);
  --ph-footer-bg: #020617;
  --ph-footer-text: #94a3b8;
}

html {
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

body {
  background: var(--ph-body-bg);
  color: var(--ph-text);
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  transition: background-color .25s ease, color .25s ease;
}

.main-content {
  min-height: calc(100vh - 140px);
}

.ph-navbar {
  background: var(--ph-navbar-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ph-border);
}

.ph-brand {
  color: var(--ph-text) !important;
  letter-spacing: -0.02em;
}

.ph-navbar .nav-link,
.ph-navbar .navbar-toggler,
.ph-navbar .btn-link,
.ph-navbar .dropdown-toggle {
  color: var(--ph-text) !important;
}

.ph-navbar .nav-link.active,
.ph-navbar .nav-link:hover,
.ph-navbar .dropdown-item.active,
.ph-navbar .dropdown-item:active {
  color: var(--ph-primary) !important;
}

.ph-navbar .dropdown-menu,
.modal-content,
.card,
.alert,
.table,
.list-group-item,
.offcanvas {
  background-color: var(--ph-surface);
  color: var(--ph-text);
  border-color: var(--ph-border);
}

.card,
.modal-content,
.dropdown-menu,
.offcanvas,
.alert {
  border-radius: var(--ph-radius);
  box-shadow: var(--ph-shadow-sm);
}

.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--ph-text);
  --bs-table-border-color: var(--ph-border);
  --bs-table-hover-bg: rgba(37, 99, 235, 0.04);
}

.text-muted,
.text-secondary,
.small,
.form-text,
.dropdown-item-text,
.table thead th {
  color: var(--ph-text-muted) !important;
}

.bg-light,
.bg-white {
  background-color: var(--ph-surface) !important;
}

.border,
.border-top,
.border-bottom,
.border-start,
.border-end,
hr,
.dropdown-divider {
  border-color: var(--ph-border) !important;
}

.btn-primary {
  background-color: var(--ph-primary);
  border-color: var(--ph-primary);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: var(--ph-primary-hover) !important;
  border-color: var(--ph-primary-hover) !important;
}

.btn-outline-light {
  border-color: var(--ph-border);
  color: var(--ph-text);
}

.btn-outline-light:hover,
.btn-outline-secondary:hover {
  background-color: var(--ph-surface-2);
  color: var(--ph-text);
  border-color: var(--ph-border);
}

.form-control,
.form-select {
  background-color: var(--ph-surface);
  color: var(--ph-text);
  border-color: var(--ph-border);
  min-height: 46px;
}

.form-control:focus,
.form-select:focus {
  background-color: var(--ph-surface);
  color: var(--ph-text);
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 0 0 .25rem rgba(37, 99, 235, 0.14);
}

.ph-surface {
  background: var(--ph-surface);
  border: 1px solid var(--ph-border);
  border-radius: var(--ph-radius);
  box-shadow: var(--ph-shadow-sm);
}

.ph-hero {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(37, 99, 235, 0.02) 100%);
  border: 1px solid var(--ph-border);
  border-radius: calc(var(--ph-radius) + 0.25rem);
  box-shadow: var(--ph-shadow);
}

[data-theme="dark"] .ph-hero {
  background: linear-gradient(180deg, rgba(96, 165, 250, 0.12) 0%, rgba(96, 165, 250, 0.04) 100%);
}

.ph-footer {
  background: var(--ph-footer-bg);
  color: var(--ph-footer-text);
}

.ph-footer a {
  color: #e2e8f0;
}

.theme-toggle-btn {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
}

@media (max-width: 991.98px) {
  .ph-navbar .navbar-collapse {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--ph-surface);
    border: 1px solid var(--ph-border);
    border-radius: var(--ph-radius);
    box-shadow: var(--ph-shadow-sm);
  }
}

@media (max-width: 767.98px) {
  .container {
    --bs-gutter-x: 1rem;
  }

  .card,
  .modal-content,
  .alert,
  .ph-surface,
  .ph-hero {
    border-radius: 1rem;
  }

  .table-responsive {
    border-radius: 1rem;
  }
}

.ph-footer a:hover { color: var(--ph-primary) !important; }
.modal-content .input-group-text { background: var(--ph-surface-2) !important; }
.btn-primary:disabled { opacity: 0.7; }

.ph-tabs-header .nav-link {
  border-color: transparent !important;
}
.ph-tabs-header .nav-link:hover {
  color: var(--ph-primary) !important;
  border-color: var(--ph-primary) !important;
  background: var(--ph-surface-2) !important;
}
.ph-tabs-header .nav-link.active {
  color: var(--ph-primary) !important;
  border-color: var(--ph-primary) !important;
  background: rgba(var(--ph-primary-rgb), 0.1) !important;
  box-shadow: 0 2px 8px rgba(var(--ph-primary-rgb), 0.15);
}
.ph-surface .nav-tabs { border-bottom: none; }
[data-theme="dark"] .ph-tabs-header .nav-link.active {
  background: rgba(var(--ph-primary-rgb), 0.2) !important;
}

.ph-tab-pill { border: 2px solid transparent; transition: all 0.3s; }
.ph-tab-pill:hover, .ph-tab-pill.active { border-color: var(--ph-primary) !important; background: rgba(var(--ph-primary-rgb), 0.1) !important; color: var(--ph-primary) !important; }
.bg-gradient-ph { background: linear-gradient(135deg, var(--ph-gradient-start), var(--ph-gradient-end)); }

.ph-toast.toast {
  border-radius: var(--ph-radius-lg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--ph-border);
  font-family: 'Poppins', sans-serif;
}
.ph-toast.toast-light {
  background: rgba(var(--ph-surface-rgb), 0.95);
  color: var(--ph-text);
  box-shadow: var(--ph-shadow-lg);
}
.ph-toast.toast-dark {
  background: rgba(var(--ph-surface-dark-rgb), 0.95);
  color: var(--ph-text-light);
  box-shadow: var(--ph-shadow-dark-lg);
}
.ph-toast .toast-title { font-weight: 600; font-size: 1rem; }
.ph-toast i { font-size: 1.2rem; opacity: 0.9; }
.toast-progress { background: linear-gradient(90deg, var(--ph-primary), var(--ph-primary-light)); }

.bg-ph-primary { --bs-bg-opacity: 1; background-color: rgba(var(--ph-primary-rgb), var(--bs-bg-opacity)) !important; }
.bg-ph-success { --bs-bg-opacity: 1; background-color: rgba(var(--ph-success-rgb), var(--bs-bg-opacity)) !important; }
.bg-ph-secondary { --bs-bg-opacity: 1; background-color: rgba(107, 114, 128, var(--bs-bg-opacity)) !important; }