:root {
    /* Base Variables (Light Mode Default) */
    --bg-body: #f1f5f9;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --text-main: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;

    --primary: #3b82f6;
    --primary-dim: rgba(59, 130, 246, 0.1);
    --secondary: #64748b;
    --success: #10b981;
    --success-dim: #dcfce7;
    --danger: #ef4444;
    --danger-dim: #fee2e2;
    --warning: #f59e0b;
    --sci-color: #8b5cf6;
    --sci-dim: #f3e8ff;

    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --radius-card: 12px;
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-sidebar: #020617;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #334155;

    --primary-dim: rgba(59, 130, 246, 0.2);
    --success-dim: rgba(16, 185, 129, 0.2);
    --danger-dim: rgba(239, 68, 68, 0.2);
    --sci-dim: rgba(139, 92, 246, 0.2);

    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: 'Segoe UI', system-ui, sans-serif;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
    /* Safe Area for Mobile PWA */
    padding-bottom: env(safe-area-inset-bottom);
}

/* Layout */
.wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 1000;
    transition: transform var(--transition);
    padding-top: env(safe-area-inset-top);
}

.sidebar-header {
    padding: 25px;
    font-weight: 800;
    font-size: 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    letter-spacing: 1px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-link {
    color: #94a3b8;
    padding: 16px 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    display: flex;
    align-items: center;
    border-left: 4px solid transparent;
}

.nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
    border-left-color: var(--primary);
}

.nav-link.active-sci {
    border-left-color: var(--sci-color);
}

.nav-link i {
    width: 30px;
    font-size: 1.1rem;
}

/* Mobile Sidebar Toggle */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 900;
    display: none;
    opacity: 0;
    transition: opacity var(--transition);
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

.mobile-toggle {
    display: none;
    margin-right: 15px;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Main Content */
.content {
    margin-left: 280px;
    flex: 1;
    padding: 30px;
    width: calc(100% - 280px);
    transition: margin-left var(--transition), width var(--transition);
    padding-top: calc(30px + env(safe-area-inset-top));
}

/* Views & Animations */
.section-view {
    display: none;
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cards */
.card-pro {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
    overflow: hidden;
    transition: box-shadow var(--transition), border-color var(--transition);
}

.card-pro:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.card-header-pro {
    background: rgba(0, 0, 0, 0.02);
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-sci {
    border-left: 4px solid var(--sci-color) !important;
}

.header-rent {
    border-left: 4px solid var(--warning) !important;
}

.card-body-pro {
    padding: 24px;
}

/* Forms */
.form-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
}

.form-control,
.form-select {
    background-color: var(--bg-body);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    padding: 12px;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-dim);
    outline: none;
}

.input-group-text {
    background-color: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-muted);
}

/* Theme Toggle */
.theme-switch {
    background: none;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    border-radius: 50%;
    transition: 0.3s;
}

.theme-switch:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #f59e0b;
}

/* Custom Elements */
.big-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.badge-status {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
}

.bg-ok {
    background: var(--success-dim);
    color: var(--success);
}

.bg-ko {
    background: var(--danger-dim);
    color: var(--danger);
}

/* Table */
.table-custom {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table-custom th {
    background: var(--bg-body);
    color: var(--text-muted);
    font-weight: 600;
    padding: 12px;
    text-align: left;
    border-bottom: 2px solid var(--border-color);
}

.table-custom td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.table-responsive {
    max-height: 500px;
    overflow-y: auto;
}

/* Dashboard List */
.list-group-item {
    color: var(--text-main);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .content {
        margin-left: 0;
        width: 100%;
        padding: 15px;
        padding-top: calc(15px + env(safe-area-inset-top));
    }

    .mobile-toggle {
        display: block;
    }
}

.pulse-on-change {
    animation: pulse 0.5s ease;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }

    100% {
        transform: scale(1);
    }
}