:root {
    --bg: #f5f6fa;
    --card: #ffffff;
    --border: #e2e5ec;
    --text: #2d3436;
    --text-muted: #636e72;
    --primary: #6c5ce7;
    --primary-hover: #5b4cdb;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #e17055;
    --info: #74b9ff;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

/* Login */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-container { width: 100%; max-width: 400px; padding: 20px; }
.login-card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    text-align: center;
}
.login-card h1 { font-size: 28px; margin-bottom: 4px; color: var(--primary); }
.login-card .subtitle { color: var(--text-muted); margin-bottom: 30px; font-size: 14px; }

/* Forms */
.form-group { margin-bottom: 16px; text-align: left; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,92,231,0.1);
}
.error-msg { color: var(--danger); font-size: 13px; margin-top: 12px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover:not(:disabled) { background: #00a381; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled) { background: #d35400; }
.btn-warning { background: var(--warning); color: var(--text); }
.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }

/* Navbar */
.navbar {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    display: flex;
    align-items: center;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}
.nav-brand { font-size: 18px; font-weight: 700; color: var(--primary); margin-right: 32px; }
.nav-links { display: flex; gap: 4px; }
.nav-btn {
    background: none;
    border: none;
    padding: 8px 14px;
    font-size: 14px;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius);
    transition: all 0.2s;
}
.nav-btn:hover { background: var(--bg); color: var(--text); }
.nav-btn.active { background: var(--primary); color: white; }
.nav-right { margin-left: auto; display: flex; gap: 8px; }

/* Container */
.container { max-width: 1400px; margin: 0 auto; padding: 24px; }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    text-align: center;
}
.stat-card .stat-value { font-size: 32px; font-weight: 700; }
.stat-card .stat-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 4px; }
.stat-pending .stat-value { color: var(--warning); }
.stat-approved .stat-value { color: var(--info); }
.stat-completed .stat-value { color: var(--success); }
.stat-rejected .stat-value { color: var(--text-muted); }
.stat-error .stat-value { color: var(--danger); }
.stat-total .stat-value { color: var(--primary); }

/* Sections */
.section {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.section h2 { font-size: 18px; }

/* Orders */
.order-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
    transition: all 0.2s;
}
.order-card:hover { border-color: var(--primary); box-shadow: 0 2px 12px rgba(108,92,231,0.1); }
.order-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}
.order-number { font-weight: 700; font-size: 16px; }
.order-meta { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--text-muted); }
.order-meta span { display: flex; align-items: center; gap: 4px; }
.order-actions { display: flex; gap: 6px; margin-top: 12px; }

/* Status badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.badge-pending { background: #ffeaa7; color: #6c5900; }
.badge-approved { background: #dfe6e9; color: #2d3436; }
.badge-processing { background: #a9def9; color: #0056b3; }
.badge-completed { background: #b8e994; color: #1e5631; }
.badge-rejected { background: #fab1a0; color: #6b2c20; }
.badge-error { background: #ff7675; color: #fff; }

/* Table */
.orders-table-container { overflow-x: auto; }
table.orders-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.orders-table th, table.orders-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
table.orders-table th { font-weight: 600; color: var(--text-muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
table.orders-table tr { cursor: pointer; transition: background 0.15s; }
table.orders-table tr:hover { background: var(--bg); }

/* Filter */
.filter-bar { display: flex; gap: 8px; align-items: center; }
.input-sm {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
}
.input-sm:focus { outline: none; border-color: var(--primary); }
select { padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13px; cursor: pointer; }

/* Logs */
.log-entry {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    display: flex;
    gap: 12px;
}
.log-entry:last-child { border-bottom: none; }
.log-time { color: var(--text-muted); white-space: nowrap; min-width: 140px; font-family: monospace; font-size: 12px; }
.log-action { font-weight: 600; min-width: 160px; }
.log-message { flex: 1; }
.log-status-success { color: var(--success); }
.log-status-error { color: var(--danger); }
.log-status-warning { color: #e67e22; }
.log-status-info { color: var(--info); }

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
}
.modal-content {
    position: relative;
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--card);
    z-index: 1;
}
.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px 8px;
}
.modal-close:hover { color: var(--text); }
.modal-body { padding: 20px; }

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}
.detail-item label { display: block; font-size: 11px; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.3px; margin-bottom: 2px; }
.detail-item .value { font-size: 14px; font-weight: 500; }

.comments-section { margin-top: 16px; }
.comments-section h4 { margin-bottom: 8px; font-size: 14px; }
.comment-item {
    background: var(--bg);
    padding: 8px 12px;
    border-radius: var(--radius);
    margin-bottom: 6px;
    font-size: 13px;
    white-space: pre-wrap;
    word-break: break-word;
}

.approval-form { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.approval-form h4 { margin-bottom: 12px; }
.form-row { display: flex; gap: 12px; margin-bottom: 12px; }
.form-row .form-group { flex: 1; }
.form-actions { display: flex; gap: 8px; margin-top: 16px; }

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}
.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast-container {
    position: fixed;
    top: 72px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 12px 20px;
    border-radius: var(--radius);
    color: white;
    font-size: 13px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: slideIn 0.3s ease;
    max-width: 400px;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--info); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar { padding: 0 12px; }
    .container { padding: 12px; }
    .detail-grid { grid-template-columns: 1fr; }
    .form-row { flex-direction: column; }
    .stats-grid { grid-template-columns: repeat(3, 1fr); }
}