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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo .icon {
    font-size: 32px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.status .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--warning);
}

.status.online .dot {
    background: var(--success);
}

.status.offline .dot {
    background: var(--danger);
}

/* Stats Cards */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
}

.card-icon {
    font-size: 32px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: 12px;
}

.card-info h3 {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

.card-info p {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
}

/* Listings Table */
.listings {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg);
    font-weight: 600;
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
}

td {
    font-size: 14px;
}

tr:hover {
    background: var(--bg);
}

td.empty {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-refresh {
    background: var(--bg);
    color: var(--text);
}

.btn-refresh:hover {
    background: var(--border);
}

.btn-view {
    background: var(--primary);
    color: white;
    text-decoration: none;
    display: inline-block;
}

.btn-view:hover {
    background: var(--primary-dark);
}

.price {
    font-weight: 600;
    color: var(--success);
}

.category-badge {
    display: inline-block;
    padding: 4px 8px;
    background: var(--primary);
    color: white;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

/* Settings */
.settings {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.settings h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-save {
    background: var(--success);
    color: white;
    padding: 12px 24px;
    align-self: flex-start;
}

.btn-save:hover {
    background: #059669;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px 0;
    color: var(--text-muted);
    font-size: 13px;
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 16px;
    }

    .stats {
        grid-template-columns: 1fr 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}