:root {
    /* --- TEMA DARK (Por defecto) --- */
    --bg-main: #0b1120;
    --text-main: #e0e0e0;
    --text-title: #ffffff;
    --text-muted: #a0a0a0;
    --card-bg: rgba(17, 25, 40, 0.75);
    --card-border: rgba(0, 210, 255, 0.3);
    --card-hover-border: rgba(0, 210, 255, 0.8);
    --cyan-primary: #00d2ff;
    --cyan-glow: rgba(0, 210, 255, 0.5);
    --accent-warning: #ffc107;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --input-bg: #1a2332;
    --input-border: #2c3e50;
    --modal-bg: rgba(10, 15, 25, 0.95);
    --upload-bg: rgba(10, 15, 25, 0.95);
}

[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-hover-border: #00768a;
    --cyan-primary: #00768a;
    /* Color más oscuro para legibilidad */
    --cyan-glow: transparent;
    /* Sin glow en modo claro */
    --accent-warning: #856404;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --input-bg: #ffffff;
    --input-border: #dee2e6;
    --modal-bg: #ffffff;
    --upload-bg: #ffffff;
}

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

/* Wrapper para proteger el header */
.gallery-wrapper {
    max-width: 1200px;
    margin: 0 auto;
}

/* Typography */
.gallery-main-title {
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 2px;
    color: var(--text-title);
    text-shadow: 0 0 10px var(--cyan-glow);
}

.gallery-main-title i {
    color: var(--cyan-primary);
}

/* Gallery Cards */
.gallery-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    height: 100%;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.gallery-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-color);
    border-color: var(--card-hover-border);
}

.gallery-img-container {
    height: 200px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border-bottom: 1px solid var(--card-border);
}

.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-card:hover .gallery-img {
    transform: scale(1.1);
}

.gallery-body {
    padding: 1rem;
}

.gallery-title {
    font-family: 'Orbitron', sans-serif;
    color: var(--cyan-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-shadow: 0 0 5px var(--cyan-glow);
}

.gallery-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.gallery-desc {
    font-size: 0.9rem;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Upload & Sections */
.upload-section {
    background: var(--upload-bg);
    border: 1px solid var(--cyan-primary);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: 0 0 20px var(--cyan-glow);
}

[data-theme='light'] .upload-section {
    box-shadow: 0 4px 15px var(--shadow-color);
    border: 1px solid var(--input-border);
}

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

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

[data-theme='light'] .form-control::placeholder {
    color: #495057 !important;
}

.form-control:focus {
    background-color: var(--input-bg) !important;
    border-color: var(--cyan-primary) !important;
    box-shadow: 0 0 0 0.25rem var(--cyan-glow) !important;
}

/* Buttons */
.btn-action {
    background: linear-gradient(45deg, var(--cyan-primary), #007bff);
    border: none;
    color: white !important;
    font-weight: bold;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 10px var(--cyan-glow);
}

.btn-action:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px var(--cyan-glow);
    color: white !important;
}

/* Themes 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);
}

/* Banner Login & Alerts */
.login-banner {
    border-color: var(--card-border) !important;
}

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

/* Specific for Light Mode Text */
[data-theme='light'] .text-info {
    color: #0056b3 !important;
}

[data-theme='light'] .text-warning {
    color: #856404 !important;
}

[data-theme='light'] .text-success {
    color: #155724 !important;
}

/* Lightbox Modal */
.modal-content.bg-transparent {
    background: transparent !important;
}

.btn-close-white {
    filter: invert(1) grayscale(100%) brightness(200%);
}

[data-theme='light'] .btn-close-white {
    filter: none;
}