: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: #adb5bd;

    --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);

    --referido-card-bg: rgba(255, 255, 255, 0.05);
    --referido-card-hover: rgba(255, 255, 255, 0.08);

    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.15);
    --input-focus-bg: rgba(0, 0, 0, 0.5);
    --input-text: #fff;
    --input-placeholder: rgba(255, 255, 255, 0.4);

    --cyan-primary: #00d2ff;
    --cyan-hover: rgba(0, 210, 255, 0.2);

    --success-bg: rgba(25, 135, 84, 0.2);
    --success-border: #198754;
    --success-text: #75b798;
    /* Light green for dark mode text */

    --warning-bg: rgba(255, 193, 7, 0.2);
    --warning-border: #ffc107;
    --warning-text: #ffda6a;

    --danger-bg: rgba(220, 53, 69, 0.2);
    --danger-border: #dc3545;
    --danger-text: #ea868f;

    --info-text: #0dcaf0;

    --vote-btn-border: rgba(255, 255, 255, 0.2);
    --vote-btn-text: #adb5bd;
    --vote-btn-hover-bg: rgba(255, 255, 255, 0.1);

    --filter-btn-bg: rgba(255, 255, 255, 0.05);
    --filter-btn-border: rgba(255, 255, 255, 0.15);
    --filter-btn-text: #adb5bd;

    --table-color: #e0e0e0;
    --table-hover-bg: rgba(255, 255, 255, 0.05);
    --table-border-color: #373b3e;

    /* Highlight */
    --highlight-bg: linear-gradient(135deg, rgba(0, 210, 255, 0.2), rgba(0, 255, 136, 0.2));
    --highlight-border: rgba(0, 210, 255, 0.3);
    --highlight-text: #00ff88;

    /* Category Colors (Dark Default) */
    --cat-luz-gas: #ffc107;
    --cat-cargadores: #00d2ff;
    --cat-seguros: #198754;
    --cat-accesorios: #e83e8c;
    --cat-alquiler: #6f42c1;
    --cat-finanzas: #20c997;
    --cat-otros: #adb5bd;
}

[data-theme='light'] {
    /* --- TEMA LIGHT --- */
    --bg-main: #f8f9fa;
    --text-main: #212529;
    --text-title: #1a1d21;
    --text-muted: #6c757d;

    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);

    --referido-card-bg: #ffffff;
    --referido-card-hover: #f1f3f5;

    --input-bg: #ffffff;
    --input-border: #ced4da;
    --input-focus-bg: #ffffff;
    --input-text: #212529;
    --input-placeholder: #6c757d;

    --cyan-primary: #00768a;
    /* Darker cyan for light mode visibility */
    --cyan-hover: rgba(0, 118, 138, 0.15);

    --success-bg: #d1e7dd;
    --success-border: #198754;
    --success-text: #0f5132;

    --warning-bg: #fff3cd;
    --warning-border: #78652a;
    --warning-text: #664d03;

    --danger-bg: #f8d7da;
    --danger-border: #dc3545;
    --danger-text: #842029;

    --info-text: #00768a;

    --vote-btn-border: #ced4da;
    --vote-btn-text: #6c757d;
    --vote-btn-hover-bg: #e9ecef;

    --filter-btn-bg: #ffffff;
    --filter-btn-border: #ced4da;
    --filter-btn-text: #6c757d;

    --table-color: #212529;
    --table-hover-bg: rgba(0, 0, 0, 0.05);
    --table-border-color: #dee2e6;

    /* Highlight */
    --highlight-bg: linear-gradient(135deg, rgba(0, 118, 138, 0.1), rgba(25, 135, 84, 0.1));
    --highlight-border: rgba(0, 118, 138, 0.2);
    --highlight-text: #005c6b;

    /* Category Colors (Light) */
    --cat-luz-gas: #78652a;
    --cat-cargadores: #00768a;
    --cat-otros: #6c757d;
}

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

/* Wrapper to protect header */
.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
}

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

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

/* Only apply text shadow in dark mode */
[data-theme='dark'] h1,
[data-theme='dark'] h2,
[data-theme='dark'] h3,
[data-theme='dark'] h4 {
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
}

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

.tech-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

[data-theme='dark'] .tech-card {
    backdrop-filter: blur(10px);
}

/* Form Controls */
.form-control,
.form-select {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--input-text);
}

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

.form-select option {
    background-color: var(--card-bg);
    color: var(--text-main);
}

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

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

/* Referido Card */
.referido-card {
    background: var(--referido-card-bg);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--cat-color, var(--cyan-primary));
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.referido-card:hover {
    background: var(--referido-card-hover);
    transform: translateX(5px);
}

/* Badges & Highlights */
.cat-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(127, 127, 127, 0.1);
}

.beneficio-highlight {
    background: var(--highlight-bg);
    border: 1px solid var(--highlight-border);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-weight: 600;
    color: var(--highlight-text);
}

/* Buttons */
.vote-btn {
    background: transparent;
    border: 1px solid var(--vote-btn-border);
    color: var(--vote-btn-text);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.vote-btn:hover {
    background: var(--vote-btn-hover-bg);
}

.vote-btn.active-up {
    background: rgba(25, 135, 84, 0.3);
    border-color: #198754;
    color: #198754;
}

[data-theme='light'] .vote-btn.active-up {
    background: #d1e7dd;
    color: #0f5132;
    border-color: #198754;
}

.vote-btn.active-down {
    background: rgba(220, 53, 69, 0.3);
    border-color: #dc3545;
    color: #ea868f;
}

[data-theme='light'] .vote-btn.active-down {
    background: #f8d7da;
    color: #842029;
    border-color: #dc3545;
}

.vote-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.copy-btn {
    background: var(--cyan-hover);
    border: 1px solid var(--cyan-primary);
    color: var(--cyan-primary);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    background: var(--cyan-primary);
    color: #fff;
}

.copy-btn.copied {
    background: var(--success-bg);
    border-color: var(--success-border);
    color: var(--success-text);
}

.filter-btn {
    background: var(--filter-btn-bg);
    border: 1px solid var(--filter-btn-border);
    color: var(--filter-btn-text);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--cyan-primary);
    border-color: var(--cyan-primary);
    color: #fff;
}

/* Table overrides for light mode */
.table {
    color: var(--table-color);
    border-color: var(--table-border-color);
}

.table> :not(caption)>*>* {
    background-color: transparent !important;
    color: var(--table-color);
    border-bottom-color: var(--table-border-color);
}

.table-hover>tbody>tr:hover>* {
    background-color: var(--table-hover-bg) !important;
    color: var(--table-color);
}

.table-dark {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: transparent;
    --bs-table-striped-color: var(--table-color);
    --bs-table-active-bg: transparent;
    --bs-table-active-color: var(--table-color);
    --bs-table-hover-bg: transparent;
    --bs-table-hover-color: var(--table-color);
    color: var(--table-color);
    border-color: var(--table-border-color);
}

/* Scoped Utility Classes replacement */
.content-wrapper .text-white {
    color: var(--text-title) !important;
}

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

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

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

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

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

/* Alerts / Banners */
.alert-success-custom {
    background: var(--success-bg) !important;
    color: var(--success-text) !important;
    border-left: 4px solid var(--success-border) !important;
    border-top: none;
    border-right: none;
    border-bottom: none;
}

.alert-warning-custom {
    background: var(--warning-bg) !important;
    color: var(--warning-text) !important;
    border-left: 4px solid var(--warning-border) !important;
    border-top: none;
    border-right: none;
    border-bottom: none;
}

.alert-danger-custom {
    background: var(--danger-bg) !important;
    color: var(--danger-text) !important;
    border-left: 4px solid var(--danger-border) !important;
    border-top: none;
    border-right: none;
    border-bottom: none;
}

.login-banner {
    border-left: 3px solid var(--cyan-primary) !important;
}

.welcome-banner {
    background: var(--success-bg) !important;
    border-left: 3px solid var(--success-border) !important;
    color: var(--text-main) !important;
    border-radius: 6px;
}

.welcome-banner strong {
    color: var(--success-text) !important;
}

/* Theme Toggle Button */
.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 rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

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

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

.caducidad-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
}