:root {
    --bg: #f5f7fa;
    --card: #ffffff;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #16a34a;
    --warning: #d97706;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 8px;
}

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

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

/* Navbar */
.navbar {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 52px;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
}
.nav-brand:hover { text-decoration: none; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.875rem;
}

.nav-links a { color: var(--text-muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.nav-user {
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 2px 8px;
    background: var(--bg);
    border-radius: 12px;
}

/* Container */
.container { max-width: 960px; margin: 0 auto; padding: 24px 16px; }

h1 { font-size: 1.75rem; margin-bottom: 8px; }
h2 { font-size: 1.35rem; margin-bottom: 8px; }
h3 { font-size: 1.1rem; }

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

.breadcrumb { margin-bottom: 20px; font-size: 0.9rem; color: var(--text-muted); }
.breadcrumb a { color: var(--text-muted); }

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { background: var(--bg); text-decoration: none; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
    font-size: 0.875rem;
}
.form-group input,
.form-group textarea,
.form-select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
    background: #fff;
}
.form-group textarea { resize: vertical; min-height: 60px; }
.form-group input:focus,
.form-group textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: normal !important;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] { width: auto; }

.inline-form {
    display: flex;
    gap: 8px;
    align-items: center;
}
.inline-form input { flex: 1; }

/* Grid */
.grid { display: grid; gap: 12px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* Product list items */
.product-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.product-item .meta { font-size: 0.8rem; color: var(--text-muted); }
.product-item .actions { display: flex; gap: 6px; }

/* Results table */
.results-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.results-table th,
.results-table td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}
.results-table th { font-weight: 600; background: var(--bg); }
.results-table .price { font-weight: 700; font-size: 1rem; }
.results-table .best { color: var(--success); }
.results-table .error { color: var(--danger); font-style: italic; }
.results-table .url-cell {
    max-width: 350px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Primary URL highlight */
.primary-url-section {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    padding: 16px;
    margin: 16px 0;
}

.primary-url-display {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
}

.primary-badge {
    background: var(--primary);
    color: #fff;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.primary-badge-sm {
    background: var(--primary);
    color: #fff;
    padding: 1px 6px;
    border-radius: 8px;
    font-size: 0.65rem;
    font-weight: 600;
    vertical-align: middle;
    margin-left: 4px;
}

.primary-row {
    background: #eff6ff !important;
}

/* Threshold highlights */
.threshold-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    background: var(--bg);
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.tag-low {
    background: #fef3c7;
    color: #92400e;
}

.tag-high {
    background: #fef2f2;
    color: var(--danger);
}

.tag-active {
    background: #dcfce7;
    color: var(--success);
}

.threshold-high {
    color: var(--danger) !important;
    background: #fef2f2;
    padding: 2px 6px;
    border-radius: 4px;
}

.threshold-low {
    color: var(--warning) !important;
    background: #fef3c7;
    padding: 2px 6px;
    border-radius: 4px;
}

/* URL fields section */
.url-fields { counter-reset: url-counter; }
.url-field-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}
.url-field-row .num {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 20px;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 18px; height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none; }

/* Alerts */
.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 14px;
    font-size: 0.875rem;
}
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: var(--primary); border: 1px solid #bfdbfe; }

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

.tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Login page */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.login-card {
    width: 100%;
    max-width: 400px;
}