:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: radial-gradient(circle at top center, #1a2a3a 0%, #0f1214 80%);
    --text-main: #e0e0e0;
    --text-title: #ffffff;
    --card-bg: rgba(20, 25, 30, 0.8);
    --card-border: rgba(0, 210, 255, 0.3);
    --card-shadow: 0 0 20px rgba(0, 210, 255, 0.05);
    --cyan-primary: #00d2ff;
    --cyan-shadow: rgba(0, 210, 255, 0.3);
    --search-bg: rgba(0, 0, 0, 0.5);
    --accordion-bg: rgba(20, 25, 30, 0.6);
    --accordion-button-active: rgba(0, 210, 255, 0.1);
    --table-header-bg: rgba(0, 0, 0, 0.4);
    --table-striped-bg: rgba(255, 255, 255, 0.05);
    --table-border: rgba(255, 255, 255, 0.05);
    --diff-better: #00ff9d;
    --diff-worse: #ff9966;
    --symbol-better: #00d2ff;
    --symbol-worse: #a0aeb9;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --feature-desc-bg: rgba(0, 0, 0, 0.2);
    --alert-warning-bg: rgba(255, 193, 7, 0.1);
    --alert-warning-text: #ffda6a;
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --text-main: #212529;
    --text-title: #1a1d21;
    --card-bg: #ffffff;
    --card-border: #dee2e6;
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --cyan-primary: #00768a;
    --cyan-shadow: rgba(0, 118, 138, 0.2);
    --search-bg: #ffffff;
    --accordion-bg: #ffffff;
    --accordion-button-active: rgba(0, 118, 138, 0.1);
    --table-header-bg: #f1f3f5;
    --table-striped-bg: rgba(0, 0, 0, 0.03);
    --table-border: #dee2e6;
    --diff-better: #157347;
    --diff-worse: #bb2d3b;
    --symbol-better: #00768a;
    --symbol-worse: #6c757d;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --feature-desc-bg: #f8f9fa;
    --alert-warning-bg: #fff3cd;
    --alert-warning-text: #664d03;
}

body {
    background: var(--bg-main) !important;
    color: var(--text-main);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.content-wrapper {
    max-width: 1600px;
    margin: 0 auto;
    padding-bottom: 3rem;
}

/* --- CABECERA --- */
h3 {
    color: var(--text-title);
    text-shadow: 0 0 10px var(--cyan-shadow);
    font-weight: 700;
    text-align: center;
    margin-bottom: 2rem;
}

[data-theme='light'] h3 {
    text-shadow: none;
}

/* --- CONTENEDOR TECH (HUD STYLE) --- */
.tech-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    box-shadow: var(--card-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    color: var(--text-main);
    transition: all 0.3s ease;
}

/* --- BARRA DE BÚSQUEDA --- */
.search-bar .input-group-text {
    background-color: var(--search-bg);
    border: 1px solid var(--card-border);
    border-right: none;
    color: var(--cyan-primary);
}

.search-bar .form-control {
    background-color: var(--search-bg);
    border: 1px solid var(--card-border);
    border-left: none;
    color: var(--text-main);
    height: 50px;
}

.search-bar .form-control:focus {
    background-color: var(--search-bg);
    border-color: var(--cyan-primary);
    box-shadow: 0 0 15px var(--cyan-shadow);
    color: var(--text-main);
}

.search-bar .form-control::placeholder {
    color: var(--text-main);
    opacity: 0.6;
}

[data-theme='light'] .search-bar .form-control::placeholder {
    color: #212529;
    opacity: 0.7;
}

/* --- ACORDEÓN --- */
.accordion-item {
    background-color: var(--accordion-bg);
    border: 1px solid var(--table-border);
    border-radius: 0.75rem !important;
    margin-bottom: 1rem;
    overflow: hidden;
}

.accordion-button {
    background-color: transparent;
    color: var(--text-main);
    font-weight: 600;
    font-size: 1.1rem;
}

.accordion-button:not(.collapsed) {
    background-color: var(--accordion-button-active);
    color: var(--cyan-primary);
    box-shadow: none;
    border-bottom: 1px solid var(--card-border);
}

/* Flechas del acordeón */
.accordion-button::after {
    filter: invert(1) grayscale(100%) brightness(200%);
}

[data-theme='light'] .accordion-button::after {
    filter: none;
}

.accordion-button:not(.collapsed)::after {
    filter: invert(1) sepia(100%) saturate(1000%) hue-rotate(180deg) brightness(100%);
}

[data-theme='light'] .accordion-button:not(.collapsed)::after {
    filter: sepia(100%) saturate(1000%) hue-rotate(160deg) brightness(80%);
}

.accordion-body {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 0;
}

/* --- TABLA --- */
.table {
    --bs-table-bg: transparent;
    --bs-table-accent-bg: transparent;
    --bs-table-striped-color: var(--text-main);
    --bs-table-striped-bg: var(--table-striped-bg);
    --bs-table-active-color: var(--text-title);
    --bs-table-active-bg: var(--accordion-button-active);
    --bs-table-hover-color: var(--text-title);
    --bs-table-hover-bg: var(--accordion-button-active);
    color: var(--text-main) !important;
    margin-bottom: 0;
}

.table thead th {
    background-color: var(--table-header-bg);
    color: var(--cyan-primary);
    border-bottom: 1px solid var(--card-border);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    vertical-align: middle;
    text-align: center;
}

.table thead th:first-child {
    text-align: left;
    padding-left: 1.5rem;
}

.table tbody td {
    border-bottom: 1px solid var(--table-border);
    vertical-align: middle;
    padding: 1rem;
    text-align: center;
}

.table tbody td:first-child {
    text-align: left;
    padding-left: 1.5rem;
    color: var(--text-title);
    font-weight: 500;
}

.table-hover>tbody>tr:hover>* {
    background-color: var(--accordion-button-active);
    color: var(--text-title);
}

/* --- INDICADORES Y DIFERENCIAS --- */
.diff {
    font-weight: 700;
}

.diff-better {
    color: var(--diff-better) !important;
}

.diff-worse {
    color: var(--diff-worse) !important;
}

.common {
    color: var(--text-title) !important;
    opacity: 1 !important;
}

/* Símbolos (Puntos) */
.symbol {
    font-size: 1.4rem;
    line-height: 1;
}

.symbol.diff-better {
    color: var(--symbol-better);
    text-shadow: 0 0 8px var(--cyan-shadow);
}

.symbol.diff-worse {
    color: var(--symbol-worse) !important;
    text-shadow: none;
}

.symbol.common {
    color: var(--cyan-primary);
    opacity: 0.5;
}

[data-theme='light'] .symbol.diff-better {
    text-shadow: none;
}

/* --- DESCRIPCIONES Y TOGGLES --- */
.feature-description {
    color: var(--text-main);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    border-left: 2px solid var(--cyan-primary);
    background: var(--feature-desc-bg);
    padding: 0.5rem 1rem;
    border-radius: 0 4px 4px 0;
    line-height: 1.5;
}

.feature-toggle {
    color: var(--cyan-primary);
    text-decoration: none;
    font-weight: bold;
    margin-left: 8px;
    font-size: 0.85rem;
    cursor: pointer;
}

.feature-toggle:hover {
    color: var(--text-title);
}

/* Imágenes dentro de la tabla */
.table img {
    border: 1px solid var(--table-border);
    background: #000;
    border-radius: 6px;
    max-width: 150px;
    display: block;
}

/* Alerta No Resultados */
.alert-warning {
    background: var(--alert-warning-bg);
    border-color: #ffc107;
    color: var(--alert-warning-text);
}

/* --- SELECTOR DE TEMA --- */
.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);
}

/* BYD Image customization */
.car-image-main {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5rem auto;
    border-radius: 8px;
    border: 1px solid var(--table-border);
}