/**
 * ==========================================
 * 4. THEMES & RESPONSIVE
 * Dark Mode & Mobile Optimizations
 * ==========================================
 */

/* ============================================================
   DARK MODE SUPPORT
   ============================================================ */
[data-bs-theme="dark"] {
    background-color: var(--dark-bg);
    color: var(--text-dark);
}

[data-bs-theme="dark"] body {
    background-color: var(--dark-bg);
    color: var(--text-dark);
}

/* Remove borders in dark mode */
[data-bs-theme="dark"] .section,
[data-bs-theme="dark"] .bordered-section,
[data-bs-theme="dark"] .card,
[data-bs-theme="dark"] .card-body,
[data-bs-theme="dark"] .card-header,
[data-bs-theme="dark"] .card-footer {
    border: none !important;
}

/* Cards */
[data-bs-theme="dark"] .card {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .card-body {
    color: var(--text-dark);
}

[data-bs-theme="dark"] .card-header,
[data-bs-theme="dark"] .card-footer {
    background-color: #334155;
    border-color: #475569;
}

/* Text Colors */
[data-bs-theme="dark"] .bg-light {
    background-color: var(--dark-bg-secondary) !important;
}

[data-bs-theme="dark"] .text-muted,
[data-bs-theme="dark"] .text-secondary {
    color: var(--text-dark-secondary) !important;
}

[data-bs-theme="dark"] a {
    color: #818cf8;
}

[data-bs-theme="dark"] a:hover {
    color: #a78bfa;
}

/* Phone Items */
[data-bs-theme="dark"] .phone-item {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
}

[data-bs-theme="dark"] .phone-item h3 {
    color: var(--text-dark);
}

[data-bs-theme="dark"] .phone-item p {
    color: var(--text-dark-secondary);
}

/* Forms */
[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background-color: #0f172a;
    border-color: var(--border-dark);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    background-color: var(--dark-bg-secondary);
    border-color: #6366f1;
    color: var(--text-dark);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}

[data-bs-theme="dark"] .form-control::placeholder {
    color: #94a3b8;
}

/* Badges */
[data-bs-theme="dark"] .badge {
    background-color: rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
}

[data-bs-theme="dark"] .bg-primary-subtle {
    background-color: rgba(99, 102, 241, 0.2) !important;
}

[data-bs-theme="dark"] .bg-success-subtle {
    background-color: rgba(16, 185, 129, 0.2) !important;
}

[data-bs-theme="dark"] .text-success {
    color: #10b981 !important;
}

[data-bs-theme="dark"] .bg-danger-subtle {
    background-color: rgba(239, 68, 68, 0.2) !important;
}

[data-bs-theme="dark"] .text-danger {
    color: #ef4444 !important;
}

[data-bs-theme="dark"] .bg-info-subtle {
    background-color: rgba(6, 182, 212, 0.2) !important;
}

[data-bs-theme="dark"] .text-info {
    color: #06b6d4 !important;
}

[data-bs-theme="dark"] .bg-secondary-subtle {
    background-color: rgba(148, 163, 184, 0.2) !important;
}

/* Alerts */
[data-bs-theme="dark"] .alert {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.5);
    color: #86efac;
}

[data-bs-theme="dark"] .alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
}

[data-bs-theme="dark"] .alert-info {
    background-color: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.5);
    color: #67e8f9;
}

/* Dropdown */
[data-bs-theme="dark"] .dropdown-menu {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
}

[data-bs-theme="dark"] .dropdown-item {
    color: var(--text-dark);
}

[data-bs-theme="dark"] .dropdown-item:hover,
[data-bs-theme="dark"] .dropdown-item:focus {
    background-color: #334155;
    color: #818cf8;
}

[data-bs-theme="dark"] .dropdown-divider {
    border-color: var(--border-dark);
}

/* List Group */
[data-bs-theme="dark"] .list-group-item {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .list-group-item:hover {
    background-color: #334155;
}

[data-bs-theme="dark"] .list-group-item.active {
    background-color: #6366f1;
    border-color: #6366f1;
}

/* Breadcrumb */
[data-bs-theme="dark"] .breadcrumb {
    background-color: var(--card-dark);
}

[data-bs-theme="dark"] .breadcrumb-nav {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

[data-bs-theme="dark"] .breadcrumb-nav .breadcrumb-item a {
    color: #818cf8;
}

[data-bs-theme="dark"] .breadcrumb-nav .breadcrumb-item a:hover {
    color: #d8b4fe;
}

[data-bs-theme="dark"] .breadcrumb-nav .breadcrumb-item.active {
    color: #94a3b8;
}

/* Pagination */
[data-bs-theme="dark"] .page-link {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
    color: #818cf8;
}

[data-bs-theme="dark"] .page-link:hover {
    background-color: #334155;
    border-color: #475569;
    color: #a78bfa;
}

[data-bs-theme="dark"] .page-item.active .page-link {
    background-color: #6366f1;
    border-color: #6366f1;
}

/* Accordion */
[data-bs-theme="dark"] .accordion-item {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
}

[data-bs-theme="dark"] .accordion-button {
    background-color: #334155;
    color: var(--text-dark);
}

[data-bs-theme="dark"] .accordion-button:not(.collapsed) {
    background-color: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

[data-bs-theme="dark"] .accordion-button:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}

[data-bs-theme="dark"] .accordion-body {
    background-color: #0f172a;
    color: var(--text-dark);
}

/* Table */
[data-bs-theme="dark"] table,
[data-bs-theme="dark"] .table {
    color: var(--text-dark);
    border-color: var(--border-dark);
}

[data-bs-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) {
    background-color: rgba(255, 255, 255, 0.02);
}

[data-bs-theme="dark"] .table-hover > tbody > tr:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

[data-bs-theme="dark"] .table-bordered {
    border-color: var(--border-dark);
}

[data-bs-theme="dark"] .table-bordered > :not(caption) > * > * {
    border-color: var(--border-dark);
}

/* Modal */
[data-bs-theme="dark"] .modal-content {
    background-color: var(--card-dark);
    border-color: var(--border-dark);
}

[data-bs-theme="dark"] .modal-header {
    border-color: var(--border-dark);
    color: var(--text-dark);
}

[data-bs-theme="dark"] .btn-close {
    filter: invert(1);
}

/* Footer */
[data-bs-theme="dark"] footer {
    background: var(--dark-bg-secondary);
    border-top-color: rgba(255, 255, 255, 0.08);
}

/* Share Section */
[data-bs-theme="dark"] .share-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

/* Notifications */
[data-bs-theme="dark"] .notification-card {
    background-color: #334155;
    border-color: #475569;
}

[data-bs-theme="dark"] .notification-card:hover {
    background-color: #475569;
    box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.4) !important;
}

/* Scrollbar */
[data-bs-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--dark-bg-secondary);
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--primary-400);
}

[data-bs-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--primary-500);
}

[data-bs-theme="dark"] {
    scrollbar-color: var(--primary-400) var(--dark-bg-secondary);
}

/* Buttons (Outline) */
[data-bs-theme="dark"] .btn-outline-secondary {
    color: var(--text-dark-secondary);
    border-color: var(--text-dark-secondary);
}

[data-bs-theme="dark"] .btn-outline-secondary:hover {
    background-color: #64748b;
    border-color: var(--text-dark-secondary);
}

/* Skeleton Loading */
[data-bs-theme="dark"] .skeleton {
    background-color: rgba(255, 255, 255, 0.05) !important;
}

/* Divider */
[data-bs-theme="dark"] .divider-modern span {
    background: var(--dark-bg);
}

/* Theme Toggle Icon Animation */
[data-bs-theme="dark"] .btn-theme-toggle i:nth-child(1) {
    opacity: 0;
    transform: rotate(180deg);
}

[data-bs-theme="dark"] .btn-theme-toggle i:nth-child(2) {
    opacity: 1;
    transform: rotate(0deg);
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */

/* Desktop & Large Tablets (1200px and down) */
@media (max-width: 1200px) {
    .phone-list,
    .listing-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 20px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

/* Tablets (992px and down) */
@media (max-width: 992px) {
    .navbar-custom {
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .navbar-collapse {
        background: rgba(0, 0, 0, 0.1);
        border-radius: 8px;
        margin-top: 0.5rem;
        backdrop-filter: blur(10px);
    }

    .navbar-nav .nav-link.active {
        border-left: none;
        border-bottom: 2px solid var(--primary-color);
    }

    /* Mobile Menu - Show labels */
    .nav-link span {
        display: inline !important;
        margin-left: 0.5rem;
    }
}

/* Medium Tablets (768px and down) */
@media (max-width: 768px) {
    .phone-list,
    .listing-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }

    .phone-item,
    .content-card {
        padding: 16px;
    }

    .phone-item h3,
    .content-card-title {
        font-size: 1rem;
    }

    .phone-item p,
    .content-card-excerpt {
        font-size: 0.8rem;
    }

    .hero {
        padding: 40px 16px;
        min-height: 70vh;
    }

    .hero h1,
    .hero-title {
        font-size: 2rem;
    }

    .hero p,
    .hero-subtitle {
        font-size: 1rem;
    }

    .button {
        padding: 10px 20px;
        font-size: 0.95rem;
    }

    footer {
        padding: 30px 0 16px;
    }

    .listing-header {
        flex-direction: column;
        text-align: center;
        margin-bottom: 1.5rem;
    }

    .listing-header h1,
    .listing-header h2 {
        font-size: 1.5rem;
    }

    .filter-card {
        padding: 1rem;
        margin-bottom: 1.5rem;
    }

    .filter-group {
        flex-direction: column;
        gap: 1rem;
    }

    .filter-section {
        width: 100%;
        min-width: 100%;
    }

    .filter-section form {
        flex-direction: column;
    }

    .filter-select,
    .search-input {
        width: 100%;
    }

    .pagination-link,
    .page-link {
        min-width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }

    /* Navbar */
    .nav-link {
        padding: 0.4rem 0.6rem !important;
        font-size: 0.95rem;
    }
    
    .btn-theme-toggle {
        width: 36px;
        height: 36px;
    }

    .navbar-custom .navbar-brand {
        font-size: 1.1rem;
    }

    .navbar-custom {
        padding: 0.5rem 0;
    }

    .navbar-collapse {
        margin-top: 0.5rem;
    }

    .navbar-nav {
        gap: 0.5rem !important;
    }

    /* Share Buttons */
    .share-buttons {
        justify-content: center;
    }

    .share-buttons .btn {
        font-size: 0.75rem;
        padding: 0.35rem 0.75rem;
    }

    .share-buttons .btn i {
        margin-right: 0.3rem !important;
    }

    .share-buttons .btn span {
        display: none;
    }

    /* Services */
    .service-carousel,
    .service-image-container,
    .service-icon-header,
    .service-placeholder {
        height: 250px;
    }

    .hero-stat {
        margin-bottom: 1rem;
    }

    .floating-shape {
        display: none;
    }

    .hero-orb {
        width: 100px !important;
        height: 100px !important;
    }

    /* Containers & Spacing */
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .px-md-5,
    .px-lg-5 {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }

    .py-md-5,
    .py-lg-5 {
        padding-top: 2rem !important;
        padding-bottom: 2rem !important;
    }

    /* Typography */
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    h4 {
        font-size: 1.1rem;
    }

    h5 {
        font-size: 1rem;
    }

    h6 {
        font-size: 0.95rem;
    }

    .display-4 {
        font-size: 2rem;
    }

    .display-5 {
        font-size: 1.75rem;
    }

    .display-6 {
        font-size: 1.5rem;
    }

    .display-md-4 {
        font-size: 2.5rem;
    }
    
    .fs-md-5 {
        font-size: 1.25rem;
    }

    /* Images */
    img {
        max-width: 100%;
        height: auto;
    }

    .img-thumbnail {
        padding: 0.5rem;
    }
}

/* Small Tablets & Large Phones (576px and down) */
@media (max-width: 576px) {
    .phone-list,
    .listing-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .phone-item,
    .content-card {
        padding: 12px;
    }

    .phone-item img {
        max-height: 150px;
    }

    .phone-item h3,
    .content-card-title {
        font-size: 0.95rem;
        margin-top: 10px;
    }

    .phone-item p,
    .content-card-excerpt {
        font-size: 0.75rem;
        margin-top: 5px;
    }

    .hero {
        padding: 30px 12px;
    }

    .hero h1,
    .hero-title {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .hero::before {
        width: 200px;
        height: 200px;
    }

    .button,
    .btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    footer {
        padding: 24px 0 12px;
    }

    footer h5,
    footer h6 {
        font-size: 1rem;
    }

    footer .small {
        font-size: 0.8rem;
    }

    /* Navbar */
    .nav-link {
        padding: 0.3rem 0.4rem !important;
        font-size: 0.85rem;
    }

    .btn-theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .navbar-custom .navbar-brand {
        font-size: 1rem;
    }

    .navbar-nav {
        gap: 0.25rem !important;
    }

    main {
        min-height: auto;
    }

    /* Cards */
    .card {
        margin-bottom: 1rem;
    }

    .card-body {
        padding: 1rem !important;
    }

    .card-header {
        padding: 0.75rem;
    }

    .card-footer {
        padding: 0.75rem;
    }

    /* Buttons */
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .btn-sm {
        padding: 0.35rem 0.75rem;
        font-size: 0.8rem;
    }

    .btn-block,
    .btn-w-100 {
        width: 100% !important;
    }

    .btn-filter {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
        white-space: nowrap;
    }

    .btn-service-action {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
    }

    /* Grid */
    .row > [class*="col-"] {
        margin-bottom: 1rem;
    }

    [class*="col-xs-"] {
        min-width: 100%;
    }

    /* Forms */
    .form-control,
    .form-select,
    .input-group {
        font-size: 1rem;
    }

    .form-label {
        font-size: 0.95rem;
        margin-bottom: 0.5rem;
    }

    .form-text {
        font-size: 0.8rem;
    }

    .form-control-lg {
        font-size: 1.25rem;
        letter-spacing: 3px;
    }

    /* Lists */
    .list-group-item {
        padding: 0.75rem;
    }

    .breadcrumb {
        padding: 0.5rem;
        font-size: 0.8rem;
    }

    .pagination {
        gap: 0.25rem;
    }

    .page-link {
        padding: 0.375rem 0.5rem;
        font-size: 0.85rem;
    }

    /* Modals */
    .modal-dialog {
        margin: 0.5rem;
    }

    .modal-content {
        border-radius: 0.5rem;
    }

    .modal-header,
    .modal-footer {
        padding: 1rem;
    }

    .modal-body {
        padding: 1.5rem 1rem;
    }

    /* Tooltips & Popovers */
    .tooltip-inner {
        font-size: 0.8rem;
        max-width: 150px;
    }

    .popover {
        max-width: 90vw;
    }

    /* Alerts */
    .alert {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }

    .alert-heading {
        font-size: 0.95rem;
    }

    /* Notification */
    .notification-dropdown {
        width: 100vw !important;
        max-width: calc(100vw - 2rem) !important;
        right: 1rem !important;
        left: auto !important;
    }

    /* Services */
    .service-carousel,
    .service-image-container,
    .service-icon-header,
    .service-placeholder {
        height: 200px;
    }

    .carousel-control-prev,
    .carousel-control-next {
        width: 32px;
    }

    .hero-badge .badge {
        font-size: 0.8rem;
    }

    /* Touch-friendly spacing */
    .service-card:hover {
        transform: translateY(-4px);
    }
}

/* Extra Small Phones (400px and down) */
@media (max-width: 400px) {
    .phone-list,
    .listing-grid {
        gap: 10px;
    }

    .hero h1,
    .hero-title {
        font-size: 1.25rem;
    }

    .button,
    .btn {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
    .hero-section,
    .filter-section,
    .carousel-control-prev,
    .carousel-control-next,
    .carousel-indicators,
    .btn,
    .alert,
    .card-header,
    .modal,
    [data-bs-toggle],
    #scrollTopBtn,
    .navbar,
    footer {
        display: none !important;
    }

    .service-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }

    .backup-codes-box {
        border: 2px solid #000 !important;
    }

    body {
        background: white;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* ============================================================
   PERFORMANCE & ANIMATIONS (Mobile Off)
   ============================================================ */
@media (max-width: 576px) {
    .float,
    .float-reverse,
    .hover-lift:hover,
    .hover-scale:hover,
    .card-modern:hover {
        animation: none;
        transform: none;
    }
}