/* Sidebar */
.sidebar {
    width: 260px;
    min-height: 100vh;
    background: #1e293b;
    color: #e2e8f0;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
}

.sidebar-brand {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    padding: 0.5rem 0;
}

.sidebar .nav-link {
    color: #94a3b8;
    border-radius: 8px;
    padding: 0.6rem 1rem;
    margin-bottom: 2px;
    transition: all 0.15s;
}

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

.sidebar .nav-link.active {
    color: #fff;
    background: #3b82f6;
}

/* Main content */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    background: #f8fafc;
}

/* Login page */
.login-page {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    border: none;
    border-radius: 16px;
}

/* Upload zone */
.upload-zone {
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: #f8fafc;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: #3b82f6;
    background: #eff6ff;
}

/* Cards */
.card {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
}

.card-header {
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 1.25rem;
}

/* Tables */
.table th {
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    border-bottom-width: 1px;
}

.table td {
    font-size: 0.9rem;
}

/* Status badges */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        min-height: auto;
        position: relative;
    }

    .main-content {
        margin-left: 0;
    }
}