/* Referrals Page Styles (§9.13A) */

/* Auth/Loading/Disabled States */
.referrals-auth-prompt,
.referrals-disabled-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

.referrals-auth-prompt i,
.referrals-disabled-prompt i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.referrals-auth-prompt h3,
.referrals-disabled-prompt h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.referrals-auth-prompt p,
.referrals-disabled-prompt p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 400px;
}

.referrals-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

.referrals-loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.referrals-loading p {
    color: var(--text-muted);
}

/* Header Grid (Tier + Share) */
.referrals-header-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
    .referrals-header-grid {
        grid-template-columns: 1fr;
    }
}

/* Tier Card */
.referral-tier-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.tier-badge-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.tier-badge {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark, #6366f1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.tier-badge i {
    font-size: 1.75rem;
    color: white;
}

.tier-badge.tier-bronze { background: linear-gradient(135deg, #cd7f32 0%, #a0522d 100%); box-shadow: 0 4px 16px rgba(205, 127, 50, 0.3); }
.tier-badge.tier-silver { background: linear-gradient(135deg, #c0c0c0 0%, #808080 100%); box-shadow: 0 4px 16px rgba(192, 192, 192, 0.3); }
.tier-badge.tier-gold { background: linear-gradient(135deg, #ffd700 0%, #daa520 100%); box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3); }
.tier-badge.tier-platinum { background: linear-gradient(135deg, #e5e4e2 0%, #9b9b9b 100%); box-shadow: 0 4px 16px rgba(229, 228, 226, 0.3); }

.tier-info {
    display: flex;
    flex-direction: column;
}

.tier-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.tier-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tier-progress-area {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tier-progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.tier-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, #818cf8 100%);
    border-radius: 4px;
    transition: width 0.5s ease;
    width: 0%;
}

.tier-progress-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.tier-benefits {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.tier-benefit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.tier-benefit i {
    color: var(--primary);
}

/* Share Card */
.referral-share-card {
    padding: 1.5rem;
}

.share-headline {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.share-subhead {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.share-code-area,
.share-link-area {
    margin-bottom: 1rem;
}

.share-code-label,
.share-link-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.share-code-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-tertiary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.share-code {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    letter-spacing: 0.1em;
    color: var(--primary);
    flex: 1;
}

.share-link-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.share-link-input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

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

.share-copy-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.share-copy-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.share-copy-btn.copied {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.share-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.share-btn {
    flex: 1;
}

/* Stats Grid */
.referrals-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
    .referrals-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon i {
    font-size: 1.25rem;
    color: var(--primary);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Main Grid */
.referrals-main-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 1.5rem;
}

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

/* Activity Section */
.referrals-activity-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title i {
    color: var(--primary);
}

/* Activity Cards (§9.13A.4.3) */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.25rem;
}

.activity-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.activity-referral-num {
    font-weight: 600;
    color: var(--text-primary);
}

.activity-joined {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.activity-milestones {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

@media (max-width: 500px) {
    .activity-milestones {
        grid-template-columns: 1fr;
    }
}

.milestone-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.milestone-item.completed {
    color: var(--success);
}

.milestone-item i {
    width: 16px;
    text-align: center;
}

.activity-card-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.activity-earned,
.activity-pending {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.9rem;
}

.activity-earned {
    color: var(--success);
}

.activity-pending {
    color: var(--warning, #f59e0b);
}

.activity-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    color: var(--text-muted);
}

.activity-empty i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.activity-pagination {
    margin-top: 1rem;
    text-align: center;
}

/* Sidebar */
.referrals-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* How It Works */
.how-it-works-card .card-body {
    padding: 0;
}

.milestone-list {
    display: flex;
    flex-direction: column;
}

.milestone-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.milestone-row:last-child {
    border-bottom: none;
}

.milestone-row-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.milestone-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.milestone-icon i {
    font-size: 0.9rem;
    color: var(--primary);
}

.milestone-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.milestone-reward {
    font-weight: 600;
    color: var(--success);
    font-size: 0.9rem;
}

/* Tiers Card */
.tiers-card .card-body {
    padding: 0;
}

.tiers-list {
    display: flex;
    flex-direction: column;
}

.tier-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.tier-row:last-child {
    border-bottom: none;
}

.tier-row.current {
    background: rgba(99, 102, 241, 0.1);
}

.tier-row-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tier-row-badge {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.tier-row-badge.bronze { background: linear-gradient(135deg, #cd7f32 0%, #a0522d 100%); color: white; }
.tier-row-badge.silver { background: linear-gradient(135deg, #c0c0c0 0%, #808080 100%); color: white; }
.tier-row-badge.gold { background: linear-gradient(135deg, #ffd700 0%, #daa520 100%); color: #333; }
.tier-row-badge.platinum { background: linear-gradient(135deg, #e5e4e2 0%, #9b9b9b 100%); color: #333; }

.tier-row-info {
    display: flex;
    flex-direction: column;
}

.tier-row-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.tier-row-threshold {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.tier-row-multiplier {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

/* Terms Card */
.terms-card .card-header.collapsible {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.terms-chevron {
    transition: transform 0.2s ease;
    color: var(--text-muted);
}

.terms-card .card-header.collapsible.expanded .terms-chevron {
    transform: rotate(180deg);
}

.terms-body {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.terms-list {
    margin-top: 0.75rem;
    padding-left: 1.25rem;
}

.terms-list li {
    margin-bottom: 0.35rem;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.875rem 1.25rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: toast-in 0.3s ease;
}

.toast.toast-success {
    border-color: var(--success);
}

.toast.toast-success i {
    color: var(--success);
}

.toast-out {
    animation: toast-out 0.3s ease forwards;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toast-out {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .share-code {
        font-size: 1.25rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
}