:root {
    --sidebar-width: 260px;
    --primary-color: #0d6efd;
    --sidebar-bg: #1a1d23;
    --sidebar-text: #adb5bd;
    --sidebar-active: #0d6efd;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f0f2f5;
    overflow-x: hidden;
}

.wrapper {
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    color: #fff;
    font-size: 1.1rem;
}

.sidebar-nav .nav-link {
    color: var(--sidebar-text);
    padding: 0.65rem 1rem;
    border-radius: 8px;
    margin: 2px 8px;
    display: flex;
    align-items: center;
    transition: all 0.2s;
    text-decoration: none;
}

.sidebar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.sidebar-nav .nav-link.active {
    background: var(--sidebar-active);
    color: #fff;
}

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-area {
    flex: 1;
}

.stat-card {
    border: none;
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.avatar-sm {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
    font-weight: 600;
}

.dropzone {
    border: 2px dashed #dee2e6;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: #fafbfc;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--primary-color);
    background: rgba(13, 110, 253, 0.05);
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.media-item {
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    aspect-ratio: 1;
    background: #e9ecef;
    cursor: pointer;
    transition: transform 0.2s;
}

.media-item:hover {
    transform: scale(1.03);
}

.media-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.media-item .media-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: #fff;
    padding: 8px;
    font-size: 0.75rem;
}

.platform-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: #fff;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: #dee2e6;
    border-radius: 8px;
    overflow: hidden;
}

.calendar-header {
    background: #f8f9fa;
    font-size: 0.85rem;
}

.calendar-day {
    background: #fff;
    min-height: 100px;
    padding: 8px;
    font-size: 0.85rem;
}

.calendar-day.today {
    background: rgba(13, 110, 253, 0.08);
}

.calendar-day.other-month {
    background: #f8f9fa;
    color: #adb5bd;
}

.calendar-event {
    background: var(--primary-color);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    margin-top: 2px;
    cursor: grab;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    border-radius: 16px;
    border: none;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
}