/**
 * Advanced Table of Contents - Preset Designs
 * 
 * @package Advanced_TOC
 * @version 1.0.0
 */

/* ========================================
   PROFESSIONAL PRESET
   Clean borders, subtle shadows, business-ready
   ======================================== */
.toc-preset-professional {
    --toc-bg-color: #ffffff;
    --toc-text-color: #1f2937;
    --toc-border-color: #d1d5db;
    --toc-hover-bg: #f9fafb;
    border: 2px solid var(--toc-border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06), 0 4px 6px rgba(0, 0, 0, 0.04);
}

.toc-preset-professional .toc-header {
    background: linear-gradient(to bottom, #f9fafb, #ffffff);
    margin: -1.5rem -1.5rem 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 2px solid var(--toc-border-color);
    border-radius: var(--toc-border-radius) var(--toc-border-radius) 0 0;
}

.toc-preset-professional .toc-title {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #111827;
}

.toc-preset-professional .toc-link {
    font-weight: 500;
    padding: 0.4rem 0.75rem;
}

.toc-preset-professional .toc-link:hover {
    background: #eff6ff;
    color: var(--toc-primary-color);
    transform: translateX(4px);
}

.toc-preset-professional .toc-link.toc-active {
    background: #dbeafe;
    color: var(--toc-primary-color);
    border-left: 3px solid var(--toc-primary-color);
    padding-left: calc(0.75rem - 3px);
}

/* ========================================
   MINIMAL PRESET
   Ultra-clean, maximum whitespace, typography-focused
   ======================================== */
.toc-preset-minimal {
    --toc-bg-color: transparent;
    --toc-text-color: #374151;
    --toc-border-color: #e5e7eb;
    --toc-hover-bg: #f9fafb;
    background: transparent;
    border: none;
    border-left: 3px solid var(--toc-border-color);
    box-shadow: none;
    padding: 0 0 0 1.5rem;
}

.toc-preset-minimal .toc-header {
    border: none;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.toc-preset-minimal .toc-title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.125em;
    font-weight: 400;
    letter-spacing: 0.025em;
    color: #111827;
}

.toc-preset-minimal .toc-icon {
    display: none;
}

.toc-preset-minimal .toc-toggle {
    border: none;
    background: #f3f4f6;
}

.toc-preset-minimal .toc-list .toc-list {
    margin-left: 1.25rem;
    margin-top: 0.5rem;
}

.toc-preset-minimal .toc-link {
    padding: 0.3rem 0;
    margin: 0;
    font-size: 0.95em;
    color: #6b7280;
}

.toc-preset-minimal .toc-link:hover {
    background: transparent;
    color: #111827;
    padding-left: 0.25rem;
}

.toc-preset-minimal .toc-link.toc-active {
    background: transparent;
    color: #111827;
    font-weight: 600;
}

.toc-preset-minimal ol.toc-list > .toc-item::before,
.toc-preset-minimal ul.toc-list > .toc-item::before {
    color: #9ca3af;
    font-weight: 400;
}

/* ========================================
   MODERN PRESET
   Gradients, glassmorphism, vibrant accents
   ======================================== */
.toc-preset-modern {
    --toc-bg-color: rgba(255, 255, 255, 0.7);
    --toc-text-color: #0f172a;
    --toc-border-color: rgba(226, 232, 240, 0.8);
    --toc-hover-bg: rgba(241, 245, 249, 0.6);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(240, 249, 255, 0.9));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(226, 232, 240, 0.5);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.toc-preset-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--toc-primary-color), 
        var(--toc-secondary-color), 
        var(--toc-primary-color)
    );
    background-size: 200% 100%;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.toc-preset-modern .toc-header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.5), rgba(240, 249, 255, 0.5));
    border: none;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    backdrop-filter: blur(5px);
}

.toc-preset-modern .toc-title {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 700;
    background: linear-gradient(135deg, var(--toc-primary-color), var(--toc-secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.toc-preset-modern .toc-icon {
    color: var(--toc-primary-color);
    filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.2));
}

.toc-preset-modern .toc-link {
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toc-preset-modern .toc-link:hover {
    background: linear-gradient(135deg, rgba(239, 246, 255, 0.8), rgba(219, 234, 254, 0.8));
    color: var(--toc-primary-color);
    transform: translateX(8px) scale(1.02);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.toc-preset-modern .toc-link.toc-active {
    background: linear-gradient(135deg, rgba(219, 234, 254, 0.9), rgba(191, 219, 254, 0.9));
    color: var(--toc-primary-color);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

/* ========================================
   CLASSIC PRESET
   Traditional serif fonts, timeless design
   ======================================== */
.toc-preset-classic {
    --toc-bg-color: #fdfdf8;
    --toc-text-color: #1c1917;
    --toc-border-color: #d6d3d1;
    --toc-hover-bg: #fafaf9;
    background: var(--toc-bg-color);
    border: 2px solid var(--toc-border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.toc-preset-classic .toc-header {
    border-bottom: 2px double var(--toc-border-color);
    padding-bottom: 1rem;
}

.toc-preset-classic .toc-title {
    font-family: Georgia, Garamond, 'Times New Roman', serif;
    font-size: 1.375em;
    font-weight: 600;
    color: #292524;
    letter-spacing: 0.015em;
    text-transform: none;
}

.toc-preset-classic .toc-icon {
    color: #78716c;
}

.toc-preset-classic .toc-toggle {
    border: 2px solid var(--toc-border-color);
    background: var(--toc-bg-color);
    border-radius: 4px;
}

.toc-preset-classic .toc-toggle:hover {
    background: #f5f5f4;
    border-color: #a8a29e;
}

.toc-preset-classic .toc-list {
    font-family: Georgia, Garamond, 'Times New Roman', serif;
}

.toc-preset-classic .toc-link {
    font-size: 1em;
    color: #44403c;
    padding: 0.35rem 0.5rem;
    border-radius: 4px;
}

.toc-preset-classic .toc-link:hover {
    background: #f5f5f4;
    color: #1c1917;
    text-decoration: underline;
    text-decoration-color: var(--toc-border-color);
    text-underline-offset: 3px;
}

.toc-preset-classic .toc-link.toc-active {
    background: #f5f5f4;
    color: #1c1917;
    font-weight: 700;
    border-left: 4px solid #78716c;
    padding-left: calc(0.5rem - 4px);
}

.toc-preset-classic ol.toc-list > .toc-item::before {
    color: #78716c;
    font-variant-numeric: oldstyle-nums;
}

/* ========================================
   ELEGANT PRESET
   Refined spacing, sophisticated color palette
   ======================================== */
.toc-preset-elegant {
    --toc-bg-color: #fefce8;
    --toc-text-color: #1e293b;
    --toc-border-color: #e4e0d7;
    --toc-hover-bg: #fef9e7;
    background: linear-gradient(to bottom right, #fefce8, #fffef5);
    border: 1px solid var(--toc-border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.03), 0 10px 20px rgba(0, 0, 0, 0.02);
    padding: 2rem;
}

.toc-preset-elegant .toc-header {
    background: none;
    border: none;
    border-bottom: 1px solid #e4e0d7;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
}

.toc-preset-elegant .toc-title {
    font-family: 'Palatino Linotype', Palatino, 'Book Antiqua', serif;
    font-size: 1.25em;
    font-weight: 600;
    color: #0f172a;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.95em;
}

.toc-preset-elegant .toc-icon {
    color: #a78bfa;
}

.toc-preset-elegant .toc-toggle {
    border: 1px solid #d4d0c8;
    background: #fffef5;
    border-radius: 50%;
    width: 36px;
    height: 36px;
}

.toc-preset-elegant .toc-toggle:hover {
    background: #fef9e7;
    border-color: #a78bfa;
    box-shadow: 0 2px 4px rgba(167, 139, 250, 0.2);
}

.toc-preset-elegant .toc-list {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0.015em;
}

.toc-preset-elegant .toc-list .toc-list {
    margin-left: 2rem;
    margin-top: 0.75rem;
}

.toc-preset-elegant .toc-item {
    margin: 0.75rem 0;
}

.toc-preset-elegant .toc-link {
    padding: 0.5rem 0.875rem;
    border-radius: 6px;
    color: #475569;
    font-size: 0.95em;
}

.toc-preset-elegant .toc-link:hover {
    background: linear-gradient(135deg, #fef3c7, #fef9e7);
    color: #0f172a;
    transform: translateX(6px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.toc-preset-elegant .toc-link.toc-active {
    background: linear-gradient(135deg, #fef3c7, #fed7aa);
    color: #0f172a;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.toc-preset-elegant ol.toc-list > .toc-item::before,
.toc-preset-elegant ul.toc-list > .toc-item::before {
    color: #a78bfa;
}

/* ========================================
   Dark Mode Support for Presets
   ======================================== */
@media (prefers-color-scheme: dark) {
    .toc-preset-professional.toc-scheme-auto {
        --toc-bg-color: #1f2937;
        --toc-text-color: #f3f4f6;
        --toc-border-color: #374151;
        --toc-hover-bg: #374151;
    }
    
    .toc-preset-professional.toc-scheme-auto .toc-header {
        background: linear-gradient(to bottom, #374151, #1f2937);
    }
    
    .toc-preset-minimal.toc-scheme-auto {
        --toc-text-color: #d1d5db;
        border-left-color: #4b5563;
    }
    
    .toc-preset-modern.toc-scheme-auto {
        background: linear-gradient(135deg, rgba(31, 41, 55, 0.9), rgba(17, 24, 39, 0.9));
    }
    
    .toc-preset-classic.toc-scheme-auto {
        --toc-bg-color: #292524;
        --toc-text-color: #fafaf9;
        --toc-border-color: #44403c;
    }
    
    .toc-preset-elegant.toc-scheme-auto {
        background: linear-gradient(to bottom right, #1e293b, #0f172a);
        --toc-text-color: #e2e8f0;
        --toc-border-color: #334155;
    }
}

/* ========================================
   Responsive Adjustments for Presets
   ======================================== */
@media (max-width: 768px) {
    .toc-preset-modern {
        backdrop-filter: blur(5px);
    }
    
    .toc-preset-elegant {
        padding: 1.5rem;
    }
    
    .toc-preset-professional .toc-header {
        margin: -1rem -1rem 0.75rem;
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {
    .toc-preset-elegant {
        padding: 1rem;
    }
    
    .toc-preset-classic .toc-title,
    .toc-preset-elegant .toc-title {
        font-size: 1em;
    }
}