:root {
    --bg-color: #0d1117;
    --card-bg: rgba(22, 27, 34, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --primary: #58a6ff;
    --primary-hover: #1f6feb;
    --text-main: #f0f6fc;
    --text-muted: #8b949e;
    --danger: #f85149;
    --glass-blur: blur(16px);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Utilities */
.hidden { display: none !important; }
.error-msg { color: var(--danger); margin-top: 10px; font-size: 0.9em; }

/* Buttons */
button, .btn-primary, .btn-secondary, .btn-ghost {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    font-size: 0.95em;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background-color: #d13d36;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}
.btn-ghost:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.btn-icon {
    padding: 8px;
    min-width: auto;
}
.btn-icon svg {
    display: block;
}

/* Glass Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Overlays */
.overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: var(--glass-blur);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Login */
.login-card {
    width: 360px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: center;
}
.login-card h1 { font-size: 1.5rem; font-weight: 600; }
.login-card p { color: var(--text-muted); font-size: 0.9rem; }
.login-card form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.login-card input {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 1rem;
    transition: border 0.2s;
}
.login-card input:focus {
    outline: none;
    border-color: var(--primary);
}

.password-input-wrap {
    position: relative;
}
.password-input-wrap input {
    padding-right: 44px;
}
.password-toggle {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}
.password-toggle:hover {
    color: var(--text-main);
}

/* Dashboard */
#dashboard { flex: 1; display: flex; flex-direction: column; }

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
    position: sticky;
    top: 0;
    z-index: 10;
}
.nav-left { display: flex; flex-direction: column; gap: 4px; }
.nav-left h2 { font-size: 1.2rem; }
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-right a.btn-icon { text-decoration: none; color: inherit; }

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.breadcrumb-item {
    cursor: pointer;
    transition: color 0.2s;
}
.breadcrumb-item:hover { color: var(--primary); text-decoration: underline; }
.breadcrumb-item::after { content: '/'; margin-left: 8px; color: var(--border-color); }
.breadcrumb-item:last-child { color: var(--text-main); cursor: default; }
.breadcrumb-item:last-child:hover { text-decoration: none; }
.breadcrumb-item:last-child::after { content: ''; }

.toolbar {
    padding: 24px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}
.view-toggle {
    display: flex;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}
.btn-view {
    padding: 8px 12px;
    background: rgba(255,255,255,0.05);
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
}
.btn-view:hover { color: var(--text-main); background: rgba(255,255,255,0.08); }
.btn-view.active { color: var(--primary); background: rgba(88, 166, 255, 0.15); }
.view-toggle .btn-view + .btn-view { border-left: 1px solid var(--border-color); }

.status-msg {
    font-size: 0.9rem;
    color: var(--primary);
    animation: pulse 2s infinite;
}

.dropzone-section {
    padding: 0 40px 16px 40px;
}
.dropzone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 32px 24px;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.dropzone:hover,
.dropzone.drag-over {
    border-color: var(--primary);
    background: rgba(88, 166, 255, 0.08);
}
.dropzone-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

/* Grid */
.file-grid {
    padding: 0 40px 24px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 24px;
}
/* List view */
.file-grid.view-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0 40px 24px 40px;
}
.file-grid.view-list .list-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.15s;
}
.file-grid.view-list .list-row:hover {
    background: rgba(255, 255, 255, 0.05);
}
.file-grid.view-list .list-row .list-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}
.file-grid.view-list .list-row .list-name {
    flex: 1;
    min-width: 0;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.file-grid.view-list .list-row .list-size {
    flex-shrink: 0;
    width: 72px;
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.file-grid.view-list .list-row .list-date {
    flex-shrink: 0;
    width: 120px;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.file-grid.view-list .list-row .list-delete {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}
.file-grid.view-list .list-row .list-delete:hover {
    color: var(--danger);
    background: rgba(248, 81, 73, 0.15);
}

.load-more-wrap {
    padding: 0 40px 40px 40px;
    display: flex;
    justify-content: center;
}
.load-more-wrap .btn-secondary { min-width: 140px; }

/* Metrics page (inside main, with toolbar) */
.metrics-page {
    padding: 0 40px 40px 40px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.metrics-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.metrics-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
}
.metrics-title code {
    font-size: 0.9em;
    background: rgba(255,255,255,0.08);
    padding: 2px 6px;
    border-radius: 4px;
}
.metrics-content {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    overflow: auto;
    max-height: 60vh;
    font-family: ui-monospace, monospace;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-muted);
    white-space: pre;
    margin: 0;
}

.item-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.item-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}
.item-card.folder svg { color: var(--primary); }
.item-card .item-name {
    font-size: 0.9rem;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.delete-icon {
    position: absolute;
    top: 8px; right: 8px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    width: 24px; height: 24px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
}
.item-card:hover .delete-icon {
    opacity: 1;
}
.delete-icon:hover {
    background: var(--danger);
}
.item-card.file-img {
    padding: 0;
    border: none;
    aspect-ratio: 1;
}
.item-card.file-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}
.item-card.file-img:hover img {
    transform: scale(1.05);
}
.item-card.file-img .info-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: var(--glass-blur);
    padding: 8px;
    font-size: 0.8rem;
    color: #fff;
    transform: translateY(100%);
    transition: transform 0.2s;
}
.item-card.file-img:hover .info-overlay {
    transform: translateY(0);
}

/* Preview Modal */
.preview-container {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
.preview-image-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
}
.preview-container img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}
.preview-nav {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-size: 1.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.2s;
    line-height: 1;
}
.preview-nav:hover:not(:disabled) {
    background: rgba(0, 0, 0, 0.75);
    transform: scale(1.05);
}
.preview-nav:disabled {
    opacity: 0.35;
    cursor: default;
}
.preview-info {
    margin-top: 16px;
    width: 100%;
    min-width: 400px;
    max-width: 600px;
    color: var(--text-main);
    background: var(--card-bg);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.info-header {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
}
.info-actions {
    display: flex;
    gap: 8px;
}
.info-actions input {
    flex: 1;
    padding: 8px 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.info-actions input:focus {
    outline: none;
    border-color: var(--primary);
}
.close-btn {
    position: absolute;
    top: -40px;
    right: 0;
    background: rgba(0,0,0,0.5);
    color: #fff;
    border: none;
    width: 36px; height: 36px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.close-btn:hover { background: var(--danger); }

/* ========== Responsive / móvil ========== */
@media (max-width: 768px) {
    .top-nav {
        padding: 12px 16px;
        flex-wrap: wrap;
        gap: 8px;
    }
    .nav-left {
        min-width: 0;
        flex: 1;
    }
    .nav-left h2 { font-size: 1rem; }
    .breadcrumb {
        flex-wrap: wrap;
        font-size: 0.8rem;
        gap: 4px;
    }
    .breadcrumb-item::after { margin-left: 4px; }

    .toolbar {
        padding: 16px;
        flex-wrap: wrap;
        gap: 12px;
    }
    .toolbar-actions {
        flex-wrap: wrap;
        gap: 10px;
    }
    .toolbar-actions button,
    .toolbar-actions .upload-btn,
    .toolbar-actions .btn-secondary {
        min-height: 44px;
        min-width: 44px;
        padding: 10px 14px;
        font-size: 0.9rem;
    }

    .dropzone-section { padding: 0 16px 12px 16px; }
    .dropzone { padding: 24px 16px; }
    .dropzone-text { font-size: 0.9rem; }

    .file-grid {
        padding: 16px;
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 16px;
    }
    .file-grid.view-list { padding: 0 16px 16px 16px; }
    .file-grid.view-list .list-row .list-date { width: 90px; font-size: 0.8rem; }
    .load-more-wrap { padding: 0 16px 24px 16px; }
    .item-card { padding: 12px; gap: 8px; }
    .item-card .item-name { font-size: 0.8rem; }
    .delete-icon {
        width: 32px; height: 32px;
        top: 6px; right: 6px;
        font-size: 1rem;
    }
    /* En táctil, mostrar delete siempre para que sea usable */
    .item-card .delete-icon { opacity: 0.85; }
    .item-card:hover .delete-icon { opacity: 1; }

    .metrics-page { padding: 16px; }
    .metrics-toolbar { flex-direction: column; align-items: stretch; }
    .metrics-content { max-height: 65vh; font-size: 0.75rem; padding: 12px; }

    .preview-container { max-width: 100%; padding: 0 12px; }
    .preview-container img { max-height: 70vh; }
    .preview-image-wrap { gap: 8px; }
    .preview-nav { width: 40px; height: 40px; font-size: 1.5rem; }
    .preview-info {
        min-width: 0;
        width: 100%;
        max-width: none;
        padding: 12px;
    }
    .info-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    .info-actions input { min-width: 0; }
    .close-btn {
        top: 8px;
        right: 8px;
        width: 44px;
        height: 44px;
        font-size: 1.5rem;
    }

    .glass-card { padding: 24px; }
    .login-card { width: 100%; max-width: 360px; margin: 0 16px; }
}

@media (max-width: 480px) {
    .top-nav { padding: 10px 12px; }
    .nav-right .btn-icon {
        min-width: 44px;
        min-height: 44px;
        padding: 10px;
    }

    .toolbar-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 12px;
        padding: 12px;
    }
    .file-grid.view-list { padding: 0 12px 12px 12px; }
    .file-grid.view-list .list-row .list-date { display: none; }
    .file-grid.view-list .list-row .list-size { width: 56px; }
    .load-more-wrap { padding: 0 12px 24px 12px; }
    .item-card.file-img .info-overlay {
        padding: 6px;
        font-size: 0.7rem;
    }

    .preview-info { padding: 10px; }
    .info-actions { flex-direction: column; }
    .info-actions input { width: 100%; }
    .info-actions button { width: 100%; }
}