/* ==========================================
   SMARTFUEL - THEME SYSTEM
   Dark Mode + Responsive Design
   ========================================== */

/* ============ CSS VARIABLES ============ */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #999;
    --border-color: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);

    /* Widget Colors */
    --widget-bg: #ffffff;
    --widget-border: #e9ecef;
    --widget-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);

    /* Alert Colors */
    --alert-critical: #dc3545;
    --alert-warning: #ffc107;
    --alert-info: #17a2b8;
    --alert-success: #28a745;

    /* Interactive Elements */
    --btn-hover-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-focus-border: #80bdff;

    /* Transitions */
    --transition-speed: 0.3s;
}

/* ============ DARK MODE ============ */
[data-theme="dark"] {
    --bg-primary: #1a1d23;
    --bg-secondary: #252932;
    --bg-tertiary: #2f3542;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;
    --border-color: #3d4451;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);

    --widget-bg: #252932;
    --widget-border: #3d4451;
    --widget-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);

    --btn-hover-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --input-bg: #2f3542;
    --input-border: #3d4451;
    --input-focus-border: #4dabf7;
}

/* ============ BASE THEME STYLES ============ */
body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container, .container-fluid {
    transition: background-color var(--transition-speed);
}

/* ============ DARK MODE TOGGLE ============ */
.theme-toggle {
    position: relative;
    width: 60px;
    height: 30px;
    background: var(--bg-tertiary);
    border-radius: 30px;
    cursor: pointer;
    transition: background-color 0.3s;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 5px;
}

.theme-toggle:hover {
    box-shadow: 0 0 10px var(--shadow);
}

.theme-toggle-slider {
    position: absolute;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .theme-toggle-slider {
    transform: translateX(30px);
    background: #2f3542;
    color: #ffd43b;
}

.theme-toggle-icon {
    font-size: 14px;
    transition: opacity 0.2s;
}

[data-theme="light"] .theme-toggle-icon.moon {
    opacity: 0.4;
}

[data-theme="dark"] .theme-toggle-icon.sun {
    opacity: 0.4;
}

/* ============ WIDGETS ============ */
.widget {
    background: var(--widget-bg);
    border: 1px solid var(--widget-border);
    box-shadow: var(--widget-shadow);
    transition: all var(--transition-speed);
}

.widget:hover {
    box-shadow: 0 4px 12px var(--shadow-lg);
}

.alert-card {
    background: var(--widget-bg);
    border-color: var(--widget-border);
    transition: all var(--transition-speed);
}

/* ============ CARDS & PANELS ============ */
.card {
    background: var(--widget-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-speed);
}

.card-header {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

.card-body {
    color: var(--text-primary);
}

/* ============ FORMS ============ */
.form-control {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
    transition: all 0.2s;
}

.form-control:focus {
    background-color: var(--input-bg);
    border-color: var(--input-focus-border);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control option {
    background: var(--input-bg);
    color: var(--text-primary);
}

/* ============ TABLES ============ */
.table {
    color: var(--text-primary);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--bg-tertiary);
}

.table-hover tbody tr:hover {
    background-color: var(--bg-tertiary);
}

.table thead th {
    border-color: var(--border-color);
    background-color: var(--bg-secondary);
}

.table td, .table th {
    border-color: var(--border-color);
}

/* ============ MODALS ============ */
.modal-content {
    background-color: var(--widget-bg);
    border-color: var(--border-color);
}

.modal-header {
    border-color: var(--border-color);
    background-color: var(--bg-secondary);
}

.modal-footer {
    border-color: var(--border-color);
}

.modal-body {
    color: var(--text-primary);
}

/* ============ ALERTS ============ */
.alert {
    border-color: var(--border-color);
}

[data-theme="dark"] .alert-info {
    background-color: #0c5460;
    border-color: #117a8b;
    color: #d1ecf1;
}

[data-theme="dark"] .alert-warning {
    background-color: #856404;
    border-color: #ba8b00;
    color: #fff3cd;
}

[data-theme="dark"] .alert-danger {
    background-color: #721c24;
    border-color: #a71d2a;
    color: #f8d7da;
}

[data-theme="dark"] .alert-success {
    background-color: #155724;
    border-color: #28a745;
    color: #d4edda;
}

/* ============ NAVBAR ============ */
.navbar {
    transition: background-color var(--transition-speed);
}

[data-theme="dark"] .navbar-dark {
    background-color: #1a1d23 !important;
}

.navbar-nav .nav-link {
    transition: color 0.2s;
}

/* ============ DROPDOWN MENUS ============ */
.dropdown-menu {
    background-color: var(--widget-bg);
    border-color: var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-lg);
}

.dropdown-item {
    color: var(--text-primary);
    transition: background-color 0.2s;
}

.dropdown-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.dropdown-divider {
    border-color: var(--border-color);
}

/* ============ TEXT UTILITIES ============ */
.text-muted {
    color: var(--text-secondary) !important;
}

/* ============ BORDERS ============ */
.border {
    border-color: var(--border-color) !important;
}

.border-top {
    border-color: var(--border-color) !important;
}

.border-bottom {
    border-color: var(--border-color) !important;
}

/* ============ BADGES ============ */
[data-theme="dark"] .badge-light {
    background-color: #495057;
    color: #f8f9fa;
}

/* ============ MOBILE RESPONSIVE ============ */

/* Tablet and below */
@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr !important;
    }

    .widget {
        margin-bottom: 15px;
    }

    .btn-group {
        display: flex;
        flex-direction: column;
        gap: 5px;
    }

    .btn-group .btn {
        width: 100%;
        margin: 0 !important;
    }

    /* Stack forms vertically */
    .row.align-items-center > div {
        margin-bottom: 10px;
    }

    /* Make tables scrollable */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

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

    h2 {
        font-size: 1.5rem;
    }

    .stat-number {
        font-size: 2rem !important;
    }
}

/* Mobile phones */
@media (max-width: 576px) {
    .container-fluid {
        padding-left: 10px;
        padding-right: 10px;
    }

    .widget {
        padding: 15px;
    }

    .btn-sm {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }

    /* Hide less important columns on mobile */
    .d-mobile-none {
        display: none !important;
    }

    /* Stack navbar items */
    .navbar-nav {
        flex-direction: column;
    }

    .navbar-nav .nav-item {
        width: 100%;
    }
}

/* ============ PRINT STYLES ============ */
@media print {
    .theme-toggle,
    .btn-group,
    .navbar,
    .sidebar,
    #alertsContainer {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .widget {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* ============ SMOOTH SCROLLING ============ */
html {
    scroll-behavior: smooth;
}

/* ============ FOCUS STATES (Accessibility) ============ */
*:focus {
    outline: 2px solid var(--input-focus-border);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline: 2px solid #0066cc;
}

/* ============ ANIMATIONS ============ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

/* ============ LOADING SPINNER ============ */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner-overlay .spinner-border {
    width: 3rem;
    height: 3rem;
}

/* ============ TOAST NOTIFICATIONS ============ */
.toast-container {
    position: fixed;
    top: 70px;
    right: 20px;
    z-index: 9999;
}

.toast {
    background: var(--widget-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-lg);
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.toast-body {
    color: var(--text-primary);
}

/* ============ PWA STYLES ============ */

/* PWA Install Banner */
.pwa-install-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--widget-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 24px var(--shadow-lg);
    border-radius: 12px;
    padding: 15px 20px;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-in-out;
    max-width: 500px;
    width: 90%;
}

.pwa-install-banner.show {
    opacity: 1;
    visibility: visible;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

.pwa-install-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.pwa-install-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.pwa-install-text {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.pwa-install-text strong {
    color: var(--text-primary);
    font-size: 1rem;
}

.pwa-install-text small {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.pwa-install-actions {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

/* PWA Update Banner */
.pwa-update-banner {
    position: fixed;
    top: 70px;
    right: 20px;
    background: var(--widget-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid #17a2b8;
    box-shadow: 0 4px 12px var(--shadow-lg);
    border-radius: 8px;
    padding: 15px 20px;
    z-index: 9998;
    max-width: 400px;
    animation: slideInRight 0.3s ease-out;
}

.pwa-update-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.pwa-update-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: #17a2b8;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

.pwa-update-text {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.pwa-update-text strong {
    color: var(--text-primary);
    font-size: 0.95rem;
}

.pwa-update-text small {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.pwa-update-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* Offline Indicator */
body.offline::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #ffc107, #ff6b6b);
    z-index: 10000;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

body.offline::after {
    content: 'Modalità Offline';
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #ffc107;
    color: #000;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.5);
    z-index: 9997;
    animation: fadeIn 0.3s ease-in-out;
}

/* PWA Installed State */
body.pwa-installed .pwa-install-banner {
    display: none !important;
}

/* Mobile PWA adjustments */
@media (max-width: 576px) {
    .pwa-install-banner {
        bottom: 10px;
        width: 95%;
        padding: 12px 15px;
    }

    .pwa-install-content {
        flex-direction: column;
        text-align: center;
    }

    .pwa-install-actions {
        width: 100%;
        flex-direction: column;
    }

    .pwa-install-actions .btn {
        width: 100%;
    }

    .pwa-update-banner {
        right: 10px;
        left: 10px;
        max-width: none;
    }

    body.offline::after {
        bottom: 10px;
        right: 10px;
        font-size: 0.75rem;
        padding: 6px 12px;
    }
}

/* ============ UTILITY CLASSES ============ */
.bg-theme {
    background-color: var(--bg-primary) !important;
}

.bg-theme-secondary {
    background-color: var(--bg-secondary) !important;
}

.text-theme {
    color: var(--text-primary) !important;
}

.border-theme {
    border-color: var(--border-color) !important;
}

/* ============ TRANSITIONS ============ */
* {
    transition: background-color var(--transition-speed),
                border-color var(--transition-speed),
                color var(--transition-speed);
}

/* Prevent transitions on page load */
.preload * {
    transition: none !important;
}

/* ============ PUSH NOTIFICATION TOGGLE ============ */
.push-notification-toggle {
    position: relative;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.push-notification-toggle:hover {
    color: rgba(255, 255, 255, 1);
    transform: scale(1.1);
}

.push-notification-toggle.active {
    color: #28a745;
    animation: bellRing 0.5s ease;
}

.push-notification-toggle.active:hover {
    color: #218838;
}

.push-notification-toggle.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.push-notification-toggle.disabled:hover {
    transform: none;
    color: rgba(255, 255, 255, 0.7);
}

@keyframes bellRing {
    0%, 100% { transform: rotate(0deg); }
    10%, 30%, 50%, 70%, 90% { transform: rotate(-10deg); }
    20%, 40%, 60%, 80% { transform: rotate(10deg); }
}

/* Dark mode adjustments */
[data-theme="dark"] .push-notification-toggle {
    color: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .push-notification-toggle:hover {
    color: rgba(255, 255, 255, 1);
}

[data-theme="dark"] .push-notification-toggle.active {
    color: #4ade80;
}

[data-theme="dark"] .push-notification-toggle.active:hover {
    color: #22c55e;
}