html { 
    scroll-behavior: smooth; 
}
.card[id^="feature-"] { 
    scroll-margin-top: 100px; 
}

:root {
    --tc-primary: #3b82f6;
    --tc-primary-rgb: 59, 130, 246;
    --tc-success: #10b981;
    --tc-warning: #f59e0b;
    --tc-card-bg-light: #ffffff;
    --tc-card-bg-dark: #12131a;
    --tc-card-border-light: rgba(0, 0, 0, 0.05);
    --tc-card-border-dark: rgba(255, 255, 255, 0.06);
    --tc-shadow-light: 0 10px 30px -10px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.02);
    --tc-shadow-dark: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.2);
    --tc-text-muted-light: #64748b;
    --tc-text-muted-dark: #94a3b8;
}

/* 프리미엄 카드 호버 효과 */
.premium-card {
    border-radius: 16px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--tc-card-border-light);
    background-color: var(--tc-card-bg-light);
    box-shadow: var(--tc-shadow-light);
    overflow: hidden;
}

[data-bs-theme="dark"] .premium-card {
    border-color: var(--tc-card-border-dark);
    background-color: var(--tc-card-bg-dark);
    box-shadow: var(--tc-shadow-dark);
}

.premium-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.1);
    border-color: rgba(var(--tc-primary-rgb), 0.3);
}
[data-bs-theme="dark"] .premium-card:hover {
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
    border-color: rgba(var(--tc-primary-rgb), 0.4);
}

/* 프리미엄 리스트 아이템 */
.premium-list-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
}
[data-bs-theme="dark"] .premium-list-item {
    border-bottom-color: rgba(255, 255, 255, 0.04);
}
.premium-list-item:last-child {
    border-bottom: none;
}
.premium-list-item:hover {
    background-color: rgba(var(--tc-primary-rgb), 0.03);
}
[data-bs-theme="dark"] .premium-list-item:hover {
    background-color: rgba(var(--tc-primary-rgb), 0.05);
}

/* 세련된 배지 디자인 */
.custom-badge {
    padding: 5px 10px;
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: 8px;
    letter-spacing: -0.01em;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: transform 0.2s ease;
}
.custom-badge:hover {
    transform: scale(1.03);
}
.badge-fsd {
    background-color: rgba(245, 158, 11, 0.12);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.2);
}
[data-bs-theme="dark"] .badge-fsd {
    background-color: rgba(245, 158, 11, 0.16);
    color: #fbbf24;
}
.badge-minor {
    background-color: rgba(100, 116, 139, 0.08);
    color: #475569;
    border: 1px solid rgba(100, 116, 139, 0.15);
}
[data-bs-theme="dark"] .badge-minor {
    background-color: rgba(148, 163, 184, 0.12);
    color: #cbd5e1;
}
.badge-pinned {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(239, 68, 68, 0.15));
    color: #ea580c;
    border: 1px solid rgba(245, 158, 11, 0.25);
}
[data-bs-theme="dark"] .badge-pinned {
    color: #f97316;
}

/* 텍스트 뮤트 가독성 보장 */
.text-custom-muted {
    color: var(--tc-text-muted-light);
}
[data-bs-theme="dark"] .text-custom-muted {
    color: var(--tc-text-muted-dark);
}

/* 네비게이션 커스텀 */
.custom-pagination .page-link {
    border-radius: 8px;
    margin: 0 3px;
    border: none;
    color: inherit;
    background-color: transparent;
    transition: all 0.2s ease;
}
.custom-pagination .page-item.active .page-link {
    background-color: var(--tc-primary);
    color: #ffffff;
    font-weight: 700;
}
.custom-pagination .page-link:hover:not(.active) {
    background-color: rgba(var(--tc-primary-rgb), 0.1);
    color: var(--tc-primary);
}

.toc-link { 
    color: var(--bs-body-color); 
    transition: all 0.2s ease; 
    border-left: 3px solid transparent; 
    font-weight: 500;
}
.toc-link:hover { 
    color: var(--tc-primary); 
    background-color: rgba(var(--tc-primary-rgb), 0.05); 
    border-left-color: var(--tc-primary); 
    padding-left: 18px !important;
}

.detail-badge {
    padding: 4px 8px;
    font-size: 0.68rem;
    font-weight: 700;
    border-radius: 6px;
    background-color: rgba(var(--tc-primary-rgb), 0.08);
    color: var(--tc-primary);
    border: 1px solid rgba(var(--tc-primary-rgb), 0.15);
}