:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: #121416;
    --text-main: #f8f9fa;
    --text-muted: #adb5bd;
    --text-title: #ffffff;
    --card-bg: #1f2224;
    --card-header-bg: #262a30;
    --card-border: #343a40;
    --input-bg: #1a2332;
    --input-border: rgba(13, 202, 240, 0.3);
    --input-text: #ffffff;
    --table-header-bg: #252a30;
    --table-row-odd: #1f2226;
    --table-row-even: #1a1d20;
    --table-hover: #252d38;
    --accent-cyan: #0dcaf0;
    --accent-green: #00ff9d;
    --accent-gold: #ffc107;
    --accent-purple: #a855f7;
    --accent-orange: #f97316;
    --cyan-primary: #0dcaf0;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --modal-bg: #1f2224;
    --modal-border: #343a40;
    --text-placeholder: rgba(255, 255, 255, 0.5);
    --editing-bg: #0e3a4d;
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f4f7f9;
    --text-main: #212529;
    --text-muted: #495057;
    --text-placeholder: #212529;
    --text-title: #1a1d21;
    --card-bg: #ffffff;
    --card-header-bg: #f8f9fa;
    --card-border: #dee2e6;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-text: #212529;
    --table-header-bg: #e9ecef;
    --table-row-odd: #f8f9fa;
    --table-row-even: #ffffff;
    --table-hover: #f1f3f5;
    --accent-cyan: #006680;
    --accent-green: #0a7a4f;
    --accent-gold: #856404;
    --accent-purple: #553c7b;
    --accent-orange: #9a4d0f;
    --cyan-primary: #00768a;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --modal-bg: #ffffff;
    --modal-border: #dee2e6;
    --editing-bg: #e3f2fd;
}

body {
    background-color: var(--bg-main) !important;
    color: var(--text-main) !important;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-title) !important;
}

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

[data-theme='light'] .text-white-50 {
    color: var(--text-muted) !important;
}

[data-theme='light'] .text-white {
    color: var(--text-title) !important;
}

/* --- Content Wrapper --- */
.content-wrapper {
    max-width: 1600px;
    margin: 0 auto;
}

/* --- Login Wall --- */
.login-wall {
    background: radial-gradient(circle at top center, #1a2a3a 0%, #0f1214 80%);
    min-height: 100vh;
}

[data-theme='light'] .login-wall {
    background: radial-gradient(circle at top center, #e3f2fd 0%, #f4f7f9 80%);
}

.data-card-login {
    background: var(--card-bg);
    border: 1px solid var(--accent-cyan);
    border-radius: 20px;
    box-shadow: 0 15px 35px var(--shadow-color), 0 0 20px rgba(0, 210, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-google {
    background: white;
    color: #444;
    font-weight: 600;
    border-radius: 8px;
    padding: 12px 24px;
    transition: all 0.3s ease;
    border: 1px solid #ddd;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.btn-google:hover {
    background: #f1f1f1;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-color);
    color: #000;
}

/* --- Theme Toggle --- */
.theme-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 45px;
    height: 45px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle i {
    font-size: 1.2rem;
    color: var(--cyan-primary);
}

/* --- Stat Cards --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem 0.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-cyan);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.stat-card .stat-icon {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    opacity: 0.8;
}

.stat-card h5 {
    color: var(--text-muted);
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.stat-card .stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.stat-card .stat-unit {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-left: 2px;
}

/* Color variants */
.stat-card.blue .stat-value {
    color: var(--accent-cyan);
}

.stat-card.green .stat-value {
    color: var(--accent-green);
}

.stat-card.gold .stat-value {
    color: var(--accent-gold);
}

.stat-card.purple .stat-value {
    color: var(--accent-purple);
}

.stat-card.orange .stat-value {
    color: var(--accent-orange);
}

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --- Cards --- */
.card {
    background-color: var(--card-bg) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--card-border) !important;
}

.card-header {
    background-color: var(--card-header-bg) !important;
    border-bottom: 1px solid var(--card-border) !important;
    color: var(--text-title) !important;
    font-weight: 600;
}

/* --- Forms --- */
.form-label {
    color: var(--text-main);
    font-weight: 500;
}

.form-control,
.form-select {
    background-color: var(--input-bg) !important;
    border: 1px solid var(--input-border) !important;
    color: var(--input-text) !important;
    transition: all 0.2s ease;
}

.form-control::placeholder {
    color: var(--text-placeholder) !important;
    opacity: 1;
}

.form-control:hover,
.form-select:hover {
    border-color: var(--accent-cyan) !important;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent-cyan) !important;
    box-shadow: 0 0 0 .25rem rgba(13, 202, 240, 0.25) !important;
}

/* Form icons visibility */
[data-theme='dark'] .form-control[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

[data-theme='dark'] .form-control[type="number"]::-webkit-inner-spin-button {
    filter: invert(1);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%230dcaf0' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

/* --- Tables --- */
.table-responsive {
    background-color: var(--bg-main);
    border-radius: 8px;
    border: 1px solid var(--card-border);
}

.table {
    color: var(--text-main) !important;
    margin-bottom: 0;
    background-color: transparent;
}

.table thead th {
    background-color: var(--table-header-bg) !important;
    color: var(--accent-cyan) !important;
    border-color: var(--card-border) !important;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.table tbody td {
    background-color: transparent !important;
    color: var(--text-main) !important;
    border-color: var(--card-border) !important;
}

.table-striped>tbody>tr:nth-of-type(odd) {
    background-color: var(--table-row-odd) !important;
}

.table-striped>tbody>tr:nth-of-type(even) {
    background-color: var(--table-row-even) !important;
}

.table tbody tr:hover>td {
    background-color: var(--table-hover) !important;
    color: var(--text-title) !important;
}

/* Highlighting the row being edited */
.table tbody tr.row-editing td {
    background-color: var(--editing-bg) !important;
    border-top: 1px solid var(--accent-cyan) !important;
    border-bottom: 1px solid var(--accent-cyan) !important;
}

/* --- Accordion --- */
.accordion-item {
    background-color: var(--card-bg) !important;
    border-color: var(--card-border) !important;
}

.accordion-button {
    background-color: var(--card-header-bg) !important;
    color: var(--text-main) !important;
    font-weight: 600;
}

.accordion-button:not(.collapsed) {
    background-color: var(--accent-cyan) !important;
    color: #fff !important;
}

[data-theme='light'] .accordion-button:not(.collapsed) {
    background-color: var(--accent-cyan) !important;
    color: #fff !important;
}

.accordion-button::after {
    filter: invert(var(--icon-invert, 1));
}

[data-theme='light'] {
    --icon-invert: 0;
}

[data-theme='dark'] {
    --icon-invert: 1;
}

.accordion-body {
    background-color: var(--card-bg) !important;
}

/* --- Modals --- */
.modal-content {
    background-color: var(--modal-bg) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--modal-border) !important;
}

.modal-header,
.modal-footer {
    border-color: var(--modal-border) !important;
}

.btn-close {
    filter: invert(var(--icon-invert, 1));
}

/* --- Badges --- */
.badge-carga {
    background-color: rgba(13, 202, 240, 0.2);
    color: #0dcaf0;
    border: 1px solid rgba(13, 202, 240, 0.4);
}

.badge-mantenimiento {
    background-color: rgba(255, 193, 7, 0.2);
    color: #ffc107;
    border: 1px solid rgba(255, 193, 7, 0.4);
}

.badge-viaje {
    background-color: rgba(25, 135, 84, 0.2);
    color: #198754;
    border: 1px solid rgba(25, 135, 84, 0.4);
}

.badge-reparacion {
    background-color: rgba(220, 53, 69, 0.2);
    color: #dc3545;
    border: 1px solid rgba(220, 53, 69, 0.4);
}

.badge-otros {
    background-color: rgba(108, 117, 125, 0.2);
    color: #adb5bd;
    border: 1px solid rgba(108, 117, 125, 0.4);
}

[data-theme='light'] .badge-carga {
    background-color: #e3f2fd;
    color: #006680;
}

[data-theme='light'] .badge-mantenimiento {
    background-color: #fff3cd;
    color: #856404;
}

[data-theme='light'] .badge-viaje {
    background-color: #d1e7dd;
    color: #0a7a4f;
}

[data-theme='light'] .badge-reparacion {
    background-color: #f8d7da;
    color: #842029;
}

[data-theme='light'] .badge-otros {
    background-color: #e2e3e5;
    color: #41464b;
}

/* --- Charts --- */
.chart-container {
    position: relative;
    height: 280px;
}

/* Protection for Header */
.navbar .container-fluid,
header .container-fluid,
nav .container-fluid {
    max-width: none !important;
    width: 100% !important;
}

/* --- Helper Classes --- */
.personal-nav-link {
    border-color: var(--card-border) !important;
    color: var(--text-muted) !important;
}

.personal-nav-link:hover {
    color: var(--text-title) !important;
    border-color: var(--accent-cyan) !important;
}

.admin-user-select {
    width: auto;
    background-color: var(--card-header-bg) !important;
    border-color: var(--card-border) !important;
    color: var(--text-main) !important;
}

.alert-admin-mode {
    background: rgba(255, 193, 7, 0.2) !important;
    border: 1px solid #ffc107 !important;
    color: #ffc107 !important;
}

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

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