/* ======================================
   FlatNine Referrals - App Styles
   Layered on top of Flatnine Design System
   ====================================== */

/* --- Navigation Extensions --- */
.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

[data-theme="dark"] .nav-logo-img {
    filter: brightness(0) invert(1);
}

.nav-title {
    font-weight: 700;
    font-size: 1.25rem;
}

/* --- Metric Cards --- */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.metric-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.metric-card .metric-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-card .metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.metric-card .metric-change {
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: 4px;
}

.metric-card .metric-change.positive {
    color: var(--success);
}

.metric-card .metric-change.negative {
    color: var(--danger);
}

/* --- Status Badges --- */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-badge.draft { background: rgba(107, 114, 128, 0.1); color: #6b7280; }
.status-badge.draft::before { background: #6b7280; }
.status-badge.active { background: rgba(16, 185, 129, 0.1); color: #059669; }
.status-badge.active::before { background: #059669; }
.status-badge.paused { background: rgba(245, 158, 11, 0.1); color: #d97706; }
.status-badge.paused::before { background: #d97706; }
.status-badge.ended { background: rgba(239, 68, 68, 0.1); color: #dc2626; }
.status-badge.ended::before { background: #dc2626; }

.status-badge.clicked { background: rgba(59, 130, 246, 0.1); color: #2563eb; }
.status-badge.clicked::before { background: #2563eb; }
.status-badge.signed_up { background: rgba(139, 92, 246, 0.1); color: #7c3aed; }
.status-badge.signed_up::before { background: #7c3aed; }
.status-badge.converted { background: rgba(16, 185, 129, 0.1); color: #059669; }
.status-badge.converted::before { background: #059669; }
.status-badge.rewarded { background: rgba(245, 158, 11, 0.1); color: #d97706; }
.status-badge.rewarded::before { background: #d97706; }
.status-badge.rejected { background: rgba(239, 68, 68, 0.1); color: #dc2626; }
.status-badge.rejected::before { background: #dc2626; }

.status-badge.pending { background: rgba(245, 158, 11, 0.1); color: #d97706; }
.status-badge.pending::before { background: #d97706; }
.status-badge.approved { background: rgba(59, 130, 246, 0.1); color: #2563eb; }
.status-badge.approved::before { background: #2563eb; }
.status-badge.paid { background: rgba(16, 185, 129, 0.1); color: #059669; }
.status-badge.paid::before { background: #059669; }

/* --- Funnel Chart --- */
.funnel-chart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
}

.funnel-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.funnel-bar-wrapper {
    flex: 1;
    position: relative;
}

.funnel-bar {
    height: 36px;
    border-radius: var(--radius-md);
    transition: width 0.6s ease;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-sm);
    min-width: 40px;
}

.funnel-bar.clicks { background: rgba(59, 130, 246, 0.2); }
.funnel-bar.signups { background: rgba(139, 92, 246, 0.2); }
.funnel-bar.conversions { background: rgba(16, 185, 129, 0.2); }
.funnel-bar.rewards { background: rgba(245, 158, 11, 0.2); }

.funnel-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    min-width: 100px;
}

.funnel-value {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--text-primary);
}

.funnel-rate {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-left: auto;
    min-width: 50px;
    text-align: right;
}

/* --- Leaderboard --- */
.leaderboard {
    display: flex;
    flex-direction: column;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.leaderboard-item:hover {
    background: var(--bg-secondary);
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.leaderboard-rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.leaderboard-rank.top-1 { background: rgba(245, 158, 11, 0.15); color: #d97706; }
.leaderboard-rank.top-2 { background: rgba(156, 163, 175, 0.15); color: #6b7280; }
.leaderboard-rank.top-3 { background: rgba(180, 83, 9, 0.15); color: #b45309; }

.leaderboard-info {
    flex: 1;
    min-width: 0;
}

.leaderboard-name {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.leaderboard-email {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.leaderboard-stats {
    text-align: right;
    flex-shrink: 0;
}

.leaderboard-count {
    font-weight: 700;
    color: var(--text-primary);
}

.leaderboard-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* --- Referral Card --- */
.referral-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: box-shadow var(--transition-fast);
}

.referral-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.referral-code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: var(--font-size-sm);
    background: var(--bg-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    user-select: all;
}

/* --- Page Layout --- */
.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.page-header h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.page-header .page-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* --- Section --- */
.section {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.section-body {
    padding: var(--spacing-lg);
}

/* --- Grid layout for dashboard --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Empty State --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxxl, 4rem) var(--spacing-lg);
    text-align: center;
    border: none;
}

.empty-state .empty-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
    color: var(--text-muted);
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs) 0;
}

.empty-state p {
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-lg) 0;
    max-width: 400px;
}

/* --- Filter Bar --- */
.filter-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.filter-bar .form-input {
    width: auto;
    padding: 8px 12px;
    font-size: var(--font-size-sm);
}

.filter-bar .filter-select {
    padding: 7px 28px 7px 10px;
    border-width: 2px;
}

/* --- Data Table --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: var(--bg-secondary);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* --- Fraud Score --- */
.fraud-score {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.fraud-score.low { background: rgba(16, 185, 129, 0.1); color: #059669; }
.fraud-score.medium { background: rgba(245, 158, 11, 0.1); color: #d97706; }
.fraud-score.high { background: rgba(239, 68, 68, 0.1); color: #dc2626; }

/* --- Form Sections --- */
.form-section {
    margin-bottom: var(--spacing-xl);
}

.form-section h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-md) 0;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* --- Tabs --- */
.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    overflow-x: auto;
}

.tab-link {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    white-space: nowrap;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tab-link:hover {
    color: var(--text-primary);
}

.tab-link.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .page-content {
        padding: var(--spacing-md);
    }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}