:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: radial-gradient(circle at top center, #1a2a3a 0%, #0f1214 80%);
    --text-main: #e0e0e0;
    --text-title: #ffffff;
    --text-muted: #e0e0e0;
    --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);

    --combustion-border: #fd7e14;
    --combustion-bg: rgba(253, 126, 20, 0.05);
    --combustion-text: #fd7e14;
    --combustion-icon-bg: rgba(253, 126, 20, 0.2);

    --electric-border: #0d6efd;
    --electric-bg: rgba(13, 110, 253, 0.05);
    --electric-text: #0d6efd;
    --electric-icon-bg: rgba(13, 110, 253, 0.2);

    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.15);
    --input-text: #fff;
    --input-focus-bg: rgba(0, 0, 0, 0.5);
    --input-focus-border: #00d2ff;

    --input-group-bg: rgba(255, 255, 255, 0.1);
    --input-group-border: rgba(255, 255, 255, 0.15);

    --label-color: #ced4da;
    --link-color: #0dcaf0;
    --link-hover: #fff;

    --btn-action-bg: rgba(0, 85, 164, 0.6);
    --btn-action-border: #00d2ff;
    --btn-action-text: #fff;
    --btn-action-hover-bg: #00d2ff;
    --btn-action-hover-text: #000;

    --result-card-bg: rgba(0, 0, 0, 0.2);
    --result-card-border: rgba(255, 255, 255, 0.1);
    --vr-bg: rgba(255, 255, 255, 0.5);

    --ahorro-card-bg: linear-gradient(135deg, rgba(25, 135, 84, 0.2) 0%, rgba(0, 0, 0, 0) 100%);
    --ahorro-card-border: #198754;
    --ahorro-capsule-bg: rgba(255, 255, 255, 0.05);
    --ahorro-capsule-border: rgba(255, 255, 255, 0.1);

    --modal-bg: #212529;
    --modal-border: #495057;
    --modal-header-border: #495057;
    --close-btn-filter: invert(1);
    --cyan-primary: #00d2ff;

    --text-shadow-title: 0 0 10px rgba(0, 210, 255, 0.3);
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --text-main: #212529;
    --text-title: #1a1d21;
    --text-muted: #6c757d;
    --card-bg: #ffffff;
    --card-border: #dee2e6;
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);

    --combustion-border: #fd7e14;
    --combustion-bg: rgba(253, 126, 20, 0.05);
    --combustion-text: #fd7e14;
    --combustion-icon-bg: rgba(253, 126, 20, 0.1);

    --electric-border: #0d6efd;
    --electric-bg: rgba(13, 110, 253, 0.05);
    --electric-text: #0d6efd;
    --electric-icon-bg: rgba(13, 110, 253, 0.1);

    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-text: #212529;
    --input-focus-bg: #ffffff;
    --input-focus-border: #0d6efd;

    --input-group-bg: #e9ecef;
    --input-group-border: #ced4da;

    --label-color: #495057;
    --link-color: #0d6efd;
    --link-hover: #0a58ca;

    --btn-action-bg: #0d6efd;
    --btn-action-border: #0d6efd;
    --btn-action-text: #fff;
    --btn-action-hover-bg: #0b5ed7;
    --btn-action-hover-text: #fff;

    --result-card-bg: #f8f9fa;
    --result-card-border: #dee2e6;
    --vr-bg: rgba(0, 0, 0, 0.2);

    --ahorro-card-bg: linear-gradient(135deg, rgba(25, 135, 84, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
    --ahorro-card-border: #198754;
    --ahorro-capsule-bg: rgba(0, 0, 0, 0.05);
    --ahorro-capsule-border: rgba(0, 0, 0, 0.1);

    --modal-bg: #ffffff;
    --modal-border: #dee2e6;
    --modal-header-border: #dee2e6;
    --close-btn-filter: none;
    --cyan-primary: #00768a;

    --text-shadow-title: none;
}

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

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

/* --- WRAPPER & PROTECTED CLASSES --- */
.content-wrapper {
    max-width: 1600px;
    margin: 0 auto;
}

/* Forzar ancho completo en header */
.navbar .container-fluid,
header .container-fluid,
nav .container-fluid {
    max-width: none !important;
    width: 100% !important;
}

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

/* --- TARJETA HUD BASE --- */
.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;
}

/* --- TARJETAS COMPARACIÓN --- */
.card-combustion {
    border-top: 4px solid var(--combustion-border);
    background: var(--combustion-bg);
}

.card-electric {
    border-top: 4px solid var(--electric-border);
    background: var(--electric-bg);
}

.card-header-custom {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.section-combustion-title {
    color: var(--combustion-text);
}

.section-electric-title {
    color: var(--electric-text);
}

.icon-box {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-right: 1rem;
    font-size: 1.2rem;
}

.icon-gas {
    background: var(--combustion-icon-bg);
    color: var(--combustion-text);
    border: 1px solid var(--combustion-border);
}

.icon-elec {
    background: var(--electric-icon-bg);
    color: var(--electric-text);
    border: 1px solid var(--electric-border);
}

/* --- FORMULARIOS --- */
.form-control,
.form-select {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--input-text);
    font-size: 1.1rem;
    padding: 0.7rem;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--input-focus-bg);
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 0.25rem rgba(13, 202, 240, 0.25);
    color: var(--input-text);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 0.8;
}

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

.form-label {
    color: var(--label-color);
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
    font-weight: 500;
}

.ayuda-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.8rem;
    cursor: pointer;
    display: inline-block;
    margin-top: 5px;
    transition: color 0.3s;
}

.ayuda-link:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* --- BOTONES --- */
.btn-action {
    background: var(--btn-action-bg);
    border: 1px solid var(--btn-action-border);
    color: var(--btn-action-text);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-action:hover {
    background: var(--btn-action-hover-bg);
    color: var(--btn-action-hover-text);
    border-color: var(--btn-action-hover-bg);
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
}

/* --- RESULTADOS --- */
.results-separator {
    border-bottom: 1px solid var(--result-card-border);
    padding-bottom: 10px;
}

.resultado-card {
    background: var(--result-card-bg);
    border: 1px solid var(--result-card-border);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s;
}

.resultado-card:hover {
    transform: translateY(-5px);
    border-color: var(--cyan-primary);
}

.res-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.res-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0;
}

.val-gas {
    color: #fd7e14;
    text-shadow: 0 0 10px rgba(253, 126, 20, 0.4);
}

.val-elec {
    color: #0d6efd;
    text-shadow: 0 0 10px rgba(13, 110, 253, 0.4);
}

[data-theme='light'] .val-gas {
    text-shadow: none;
}

[data-theme='light'] .val-elec {
    text-shadow: none;
}

.vr {
    background-color: var(--vr-bg) !important;
    opacity: 1 !important;
}

.ahorro-total-card {
    background: var(--ahorro-card-bg);
    border: 1px solid var(--ahorro-card-border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
    box-shadow: 0 0 30px rgba(25, 135, 84, 0.15);
}

.ahorro-val {
    font-size: 3.5rem;
    font-weight: 700;
    color: #198754;
    text-shadow: 0 0 15px rgba(25, 135, 84, 0.6);
    line-height: 1;
}

[data-theme='light'] .ahorro-val {
    text-shadow: none;
}

.ahorro-capsule {
    background: var(--ahorro-capsule-bg) !important;
    border: 1px solid var(--ahorro-capsule-border) !important;
}

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

.modal-header {
    border-bottom: 1px solid var(--modal-header-border);
}

.btn-close {
    filter: var(--close-btn-filter);
}

.modal-result-box {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
}

.modal .text-info {
    color: var(--cyan-primary) !important;
}

/* --- 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: var(--card-shadow);
    transition: all 0.3s ease;
}

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

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

/* --- ICON & TEXT COLORS --- */
.title-icon {
    color: var(--cyan-primary);
}

.content-wrapper .text-light {
    color: var(--text-main) !important;
}

.content-wrapper .text-white {
    color: var(--text-main) !important;
}

.content-wrapper .modal-body .bg-dark {
    background-color: var(--input-bg) !important;
    border-color: var(--input-border) !important;
}

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