/* ================================
   MODERN İÇERİK BAŞLIKLARI TASARIMI
   Modern TOC (Table of Contents) Style
   ================================ */

   :root {
    --toc-primary: #081C9E;
    --toc-secondary: #6B72B8;
    --toc-accent: #4F46E5;
    --toc-light: #F8FAFC;
    --toc-border: #E2E8F0;
    --toc-text: #334155;
    --toc-text-light: #64748B;
    --toc-white: #FFFFFF;
    --toc-shadow: 0 4px 20px rgba(8, 28, 158, 0.08);
    --toc-shadow-hover: 0 8px 30px rgba(8, 28, 158, 0.15);
    --toc-border-radius: 16px;
    --toc-border-radius-sm: 12px;
    --toc-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Desktop Modern TOC Container */
.modern-toc-wrapper {
    position: sticky;
    top: 20px;
    z-index: 100;
    margin: 24px 0;
}

.modern-toc-card {
    background: var(--toc-white);
    border-radius: var(--toc-border-radius);
    box-shadow: var(--toc-shadow);
    border: 1px solid var(--toc-border);
    overflow: hidden;
    transition: var(--toc-transition);
    backdrop-filter: blur(10px);
}

.modern-toc-card:hover {
    box-shadow: var(--toc-shadow-hover);
    transform: translateY(-2px);
}

/* TOC Header */
.modern-toc-header {
    padding: 24px;
    background: linear-gradient(135deg, var(--toc-primary) 0%, var(--toc-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.modern-toc-title {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--toc-white);
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.toc-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.reading-progress-container {
    position: relative;
    z-index: 1;
}

.reading-progress-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    color: var(--toc-white);
    font-size: 14px;
    font-weight: 500;
    opacity: 0.9;
}

.reading-progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.reading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--toc-white) 0%, rgba(255, 255, 255, 0.8) 100%);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 3px;
    position: relative;
}

.reading-progress-text {
    font-size: 13px;
    font-weight: 600;
    min-width: 40px;
    text-align: center;
}

/* TOC Navigation */
.modern-toc-navigation {
    padding: 8px 0;
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--toc-border) transparent;
}

.modern-toc-navigation::-webkit-scrollbar {
    width: 6px;
}

.modern-toc-navigation::-webkit-scrollbar-track {
    background: transparent;
    margin: 8px 0;
}

.modern-toc-navigation::-webkit-scrollbar-thumb {
    background: var(--toc-border);
    border-radius: 3px;
    transition: var(--toc-transition);
}

.modern-toc-navigation::-webkit-scrollbar-thumb:hover {
    background: var(--toc-secondary);
}

.modern-toc-link {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    text-decoration: none;
    color: var(--toc-text);
    font-size: 15px;
    font-weight: 500;
    transition: var(--toc-transition);
    position: relative;
    border-left: 3px solid transparent;
    line-height: 1.5;
}

.modern-toc-link:hover {
    background: linear-gradient(90deg, rgba(107, 114, 184, 0.08) 0%, transparent 100%);
    color: var(--toc-secondary);
    border-left-color: var(--toc-secondary);
    text-decoration: none;
    transform: translateX(2px);
}

.modern-toc-link.active {
    background: linear-gradient(90deg, rgba(8, 28, 158, 0.1) 0%, transparent 100%);
    color: var(--toc-primary);
    border-left-color: var(--toc-primary);
    font-weight: 600;
}

.modern-toc-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    background: var(--toc-light);
    color: var(--toc-text-light);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    margin-right: 14px;
    transition: var(--toc-transition);
    border: 1px solid var(--toc-border);
}

.modern-toc-link:hover .modern-toc-number {
    background: var(--toc-secondary);
    color: var(--toc-white);
    border-color: var(--toc-secondary);
    transform: scale(1.1);
}

.modern-toc-link.active .modern-toc-number {
    background: var(--toc-primary);
    color: var(--toc-white);
    border-color: var(--toc-primary);
    box-shadow: 0 4px 12px rgba(8, 28, 158, 0.3);
}

.modern-toc-text {
    flex: 1;
    line-height: 1.4;
}

/* TOC Footer */
.modern-toc-footer {
    padding: 20px 24px;
    background: var(--toc-light);
    border-top: 1px solid var(--toc-border);
}

.estimated-reading-time {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--toc-text-light);
    font-size: 14px;
    font-weight: 500;
}

.time-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--toc-secondary);
    border-radius: 50%;
    color: var(--toc-white);
    font-size: 10px;
}

/* Mobile TOC */
.mobile-toc-wrapper {
    margin: 20px 0;
    display: none;
}

.mobile-toc-card {
    background: var(--toc-white);
    border-radius: var(--toc-border-radius-sm);
    box-shadow: var(--toc-shadow);
    border: 1px solid var(--toc-border);
    overflow: hidden;
    transition: var(--toc-transition);
}

.mobile-toc-header {
    padding: 18px 20px;
    background: linear-gradient(135deg, var(--toc-primary) 0%, var(--toc-secondary) 100%);
    color: var(--toc-white);
    cursor: pointer;
    user-select: none;
    position: relative;
    overflow: hidden;
}

.mobile-toc-title-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}

.mobile-toc-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 16px;
}

.mobile-toc-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    backdrop-filter: blur(10px);
}

.mobile-toc-count {
    background: rgba(255, 255, 255, 0.25);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.mobile-expand-icon {
    transition: transform 0.3s ease;
    opacity: 0.8;
}

.mobile-toc-card.expanded .mobile-expand-icon {
    transform: rotate(180deg);
}

.mobile-progress-wrapper {
    position: relative;
    z-index: 1;
}

.mobile-progress-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 13px;
    font-weight: 500;
    opacity: 0.9;
}

.mobile-progress-bar {
    height: 5px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    overflow: hidden;
}

.mobile-progress-fill {
    height: 100%;
    background: var(--toc-white);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 3px;
}

.mobile-progress-text {
    font-size: 12px;
    font-weight: 600;
    min-width: 35px;
    text-align: center;
}

.mobile-toc-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(-10px);
    background: var(--toc-white);
}

.mobile-toc-card.expanded .mobile-toc-content {
    max-height: 400px !important;
    height: 400px !important;
    opacity: 1 !important;
    transform: translateY(0) !important;
    transition: opacity 0.3s ease, transform 0.3s ease;
    overflow: hidden !important;
    display: flex !important;
    flex-direction: column !important;
}

/* Expanded state styling */
.mobile-toc-card.expanded {
    box-shadow: 0 8px 25px rgba(8, 28, 158, 0.15);
}

.mobile-toc-navigation {
    padding: 0;
    flex: 1 !important;
    min-height: 300px !important;
    overflow-y: scroll !important;
    overflow-x: hidden !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: thin;
    scrollbar-color: var(--toc-secondary) transparent;
    position: relative;
}

/* Mobile scroll styling */
.mobile-toc-navigation::-webkit-scrollbar {
    width: 4px;
}

.mobile-toc-navigation::-webkit-scrollbar-track {
    background: var(--toc-light);
    border-radius: 2px;
}

.mobile-toc-navigation::-webkit-scrollbar-thumb {
    background: var(--toc-secondary);
    border-radius: 2px;
    transition: var(--toc-transition);
}

.mobile-toc-navigation::-webkit-scrollbar-thumb:hover {
    background: var(--toc-primary);
}

.mobile-toc-link {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    text-decoration: none;
    color: var(--toc-text);
    font-size: 14px;
    font-weight: 500;
    border-bottom: 1px solid var(--toc-border);
    transition: var(--toc-transition);
    position: relative;
    min-height: 60px;
    touch-action: manipulation;
}

.mobile-toc-link:last-child {
    border-bottom: none;
}

.mobile-toc-link:hover {
    background: linear-gradient(90deg, rgba(107, 114, 184, 0.08) 0%, transparent 100%);
    color: var(--toc-secondary);
    text-decoration: none;
}

.mobile-toc-link.active {
    background: linear-gradient(90deg, rgba(8, 28, 158, 0.1) 0%, transparent 100%);
    color: var(--toc-primary);
    font-weight: 600;
}

.mobile-toc-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--toc-primary);
}

.mobile-toc-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 26px;
    height: 26px;
    background: var(--toc-light);
    color: var(--toc-text-light);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    margin-right: 12px;
    transition: var(--toc-transition);
    border: 1px solid var(--toc-border);
}

.mobile-toc-link:hover .mobile-toc-number {
    background: var(--toc-secondary);
    color: var(--toc-white);
    border-color: var(--toc-secondary);
}

.mobile-toc-link.active .mobile-toc-number {
    background: var(--toc-primary);
    color: var(--toc-white);
    border-color: var(--toc-primary);
}

.mobile-toc-text {
    flex: 1;
    line-height: 1.4;
}

.mobile-toc-arrow {
    opacity: 0.4;
    transition: var(--toc-transition);
    font-size: 12px;
}

.mobile-toc-link:hover .mobile-toc-arrow {
    opacity: 1;
    transform: translateX(2px);
    color: var(--toc-secondary);
}

.mobile-toc-link.active .mobile-toc-arrow {
    opacity: 1;
    color: var(--toc-primary);
}

.mobile-toc-footer {
    padding: 12px 20px;
    background: var(--toc-light);
    border-top: 1px solid var(--toc-border);
    border-radius: 0 0 var(--toc-border-radius-sm) var(--toc-border-radius-sm);
    flex-shrink: 0;
    position: relative;
}

.mobile-estimated-time {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--toc-text-light);
    font-size: 12px;
    font-weight: 500;
}

.mobile-time-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--toc-secondary);
    border-radius: 50%;
    color: var(--toc-white);
    font-size: 8px;
}

/* Responsive Design */
@media (max-width: 990px) {
    .modern-toc-wrapper {
        display: none;
    }
    
    .mobile-toc-wrapper {
        display: block;
    }
}

@media (max-width: 768px) {
    .mobile-toc-header {
        padding: 16px 18px;
    }
    
    .mobile-toc-title {
        font-size: 15px;
    }
    
    .mobile-toc-link {
        padding: 12px 18px;
        font-size: 13px;
    }
}

/* Modern Header Progress Bar */
.header-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(20px);
    z-index: 9999;
    opacity: 0;
    transform: translateY(-100%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-progress-bar.visible {
    opacity: 1;
    transform: translateY(0);
}

.header-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--toc-primary) 0%, var(--toc-secondary) 100%);
    width: 0%;
    transition: width 0.2s ease;
    position: relative;
    overflow: hidden;
}

.header-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.4) 50%, transparent 100%);
    transform: translateX(-100%);
    animation: progressShimmer 3s infinite ease-in-out;
}

@keyframes progressShimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.header-progress-label {
    position: fixed;
    top: 8px;
    right: 16px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--toc-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 10000;
    opacity: 0;
    transform: translateY(-100%) scale(0.9);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(8, 28, 158, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-progress-label.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.header-progress-label:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 6px 25px rgba(8, 28, 158, 0.2);
    transform: translateY(0) scale(1.05);
}

.header-progress-label:active {
    transform: translateY(1px) scale(0.98);
}

.progress-label-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, var(--toc-primary), var(--toc-secondary));
    border-radius: 50%;
    color: white;
    font-size: 8px;
    margin: 0;
}

.progress-label-text {
    font-weight: 700;
    color: var(--toc-primary);
}

.progress-label-percent {
    background: linear-gradient(135deg, var(--toc-primary), var(--toc-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    min-width: 30px;
    text-align: right;
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}