/* ============================================
   PAPER-SPECIFIC STYLES
   Academic/Technical Report Styling
   ============================================ */

/* Paper Hero */
.paper-hero {
    padding: calc(80px + var(--space-4xl)) var(--space-xl) var(--space-3xl);
    background: linear-gradient(180deg, 
        var(--color-bg-primary) 0%,
        rgba(99, 102, 241, 0.1) 30%,
        rgba(139, 92, 246, 0.06) 60%,
        transparent 100%);
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    position: relative;
}

.paper-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(99, 102, 241, 0.4) 50%, 
        transparent 100%);
}

.paper-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #a5b4fc;
    margin-bottom: var(--space-lg);
    padding: 6px 14px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 20px;
}

.paper-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.85) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.paper-subtitle {
    font-size: 1.35rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-xl);
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.paper-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.95rem;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.meta-divider {
    color: rgba(255, 255, 255, 0.2);
}

.paper-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.875rem;
}

/* Paper Content */
.paper-content {
    padding: var(--space-3xl) var(--space-xl);
    background: linear-gradient(180deg, transparent 0%, rgba(12, 14, 18, 1) 100%);
}

.container-narrow {
    max-width: 780px;
    margin: 0 auto;
}

/* Table of Contents */
.paper-toc {
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.7) 0%, rgba(20, 22, 30, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: var(--space-xl);
    margin-bottom: var(--space-3xl);
    backdrop-filter: blur(10px);
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.paper-toc h3 {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: var(--space-lg);
}

.paper-toc ol {
    counter-reset: toc;
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
}

.paper-toc li {
    counter-increment: toc;
}

.paper-toc li a {
    display: block;
    padding: 10px 14px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    border-radius: 10px;
    transition: all 0.25s ease;
}

.paper-toc li a::before {
    content: counter(toc) ". ";
    color: rgba(255, 255, 255, 0.35);
}

.paper-toc li a:hover {
    background: rgba(99, 102, 241, 0.1);
    color: rgba(255, 255, 255, 0.95);
}

.paper-toc li a:hover::before {
    color: #a5b4fc;
}

/* Paper Sections */
.paper-section {
    margin-bottom: var(--space-3xl);
}

.paper-section h2 {
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid;
    border-image: linear-gradient(90deg, #6366f1, #a855f7) 1;
    display: inline-block;
    color: rgba(255, 255, 255, 0.95);
}

.paper-section h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: var(--space-2xl) 0 var(--space-lg);
    color: rgba(255, 255, 255, 0.9);
}

.paper-section p {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.08rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--space-lg);
}

.paper-section p strong {
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
}

.paper-section p em {
    color: #a5b4fc;
    font-style: normal;
}

.paper-section ul,
.paper-section ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
}

.paper-section li {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.08rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--space-sm);
}

.paper-section li strong {
    color: rgba(255, 255, 255, 0.95);
}

/* Abstract Box */
.abstract-box {
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.7) 0%, rgba(20, 22, 30, 0.8) 100%);
    border-left: 4px solid;
    border-image: linear-gradient(180deg, #6366f1, #a855f7) 1;
    border-radius: 0 14px 14px 0;
    padding: var(--space-xl);
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.abstract-box p {
    margin-bottom: var(--space-md);
}

.abstract-box p:last-child {
    margin-bottom: 0;
}

/* Insight Box */
.insight-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(168, 85, 247, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 14px;
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.insight-box h4 {
    color: #a5b4fc;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-md);
}

.insight-box p {
    margin: 0;
    color: rgba(255, 255, 255, 0.75);
}

/* Contribution List */
.contribution-list {
    list-style: none;
    padding: 0;
}

.contribution-list li {
    position: relative;
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
    color: rgba(255, 255, 255, 0.7);
}

.contribution-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #a5b4fc;
    font-weight: 600;
}

/* Equation Box */
.equation-box {
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.7) 0%, rgba(20, 22, 30, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    padding: var(--space-lg) var(--space-xl);
    margin: var(--space-xl) 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    overflow-x: auto;
    backdrop-filter: blur(10px);
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.equation {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.95);
}

.equation-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    margin-left: var(--space-xl);
}

/* Algorithm Box */
.algorithm-box {
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.7) 0%, rgba(20, 22, 30, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    overflow: hidden;
    margin: var(--space-xl) 0;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.algorithm-header {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.15), rgba(168, 85, 247, 0.1));
    padding: var(--space-md) var(--space-lg);
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.8);
}

.algorithm-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.alg-line {
    padding: var(--space-xs) 0;
    color: rgba(255, 255, 255, 0.6);
}

.alg-keyword {
    color: #a5b4fc;
    font-weight: 500;
}

/* Code Figure */
.code-figure {
    background: linear-gradient(145deg, rgba(20, 22, 30, 0.95) 0%, rgba(12, 14, 18, 0.98) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    margin: var(--space-xl) 0;
    overflow: hidden;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.code-figure pre {
    padding: var(--space-xl);
    overflow-x: auto;
    margin: 0;
}

.code-figure code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    background: none;
    padding: 0;
    color: rgba(255, 255, 255, 0.7);
}

.figure-caption {
    padding: var(--space-md) var(--space-lg);
    background: rgba(30, 32, 42, 0.5);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* API Spec */
.api-spec {
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.7) 0%, rgba(20, 22, 30, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    overflow: hidden;
    margin: var(--space-xl) 0;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.api-header {
    background: linear-gradient(90deg, rgba(34, 197, 94, 0.15), rgba(99, 102, 241, 0.1));
    padding: var(--space-md) var(--space-lg);
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.8);
}

.api-content {
    padding: var(--space-lg);
}

.api-line {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    color: rgba(255, 255, 255, 0.7);
}

.api-method {
    color: #4ade80;
    font-weight: 600;
}

.api-section {
    margin: var(--space-lg) 0;
}

.api-section ul {
    margin: var(--space-sm) 0;
    padding-left: var(--space-xl);
}

.api-section li {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
    color: rgba(255, 255, 255, 0.6);
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-xl) 0;
    font-size: 0.95rem;
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.5) 0%, rgba(20, 22, 30, 0.6) 100%);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.data-table th,
.data-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.data-table th {
    background: rgba(30, 32, 42, 0.8);
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.data-table td {
    color: rgba(255, 255, 255, 0.65);
}

.data-table tr:hover {
    background: rgba(99, 102, 241, 0.06);
}

.data-table tr.highlight {
    background: rgba(99, 102, 241, 0.12);
}

.data-table tr.highlight td {
    color: rgba(255, 255, 255, 0.95);
}

.data-table tr.total {
    background: rgba(30, 32, 42, 0.8);
}

.data-table tr.total td {
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
}

/* Tags */
.tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.tag-red {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.tag-yellow {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.tag-green {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

/* Metrics Row */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.metrics-row .metric {
    text-align: center;
    padding: var(--space-lg);
    background: linear-gradient(145deg, rgba(30, 32, 42, 0.7) 0%, rgba(20, 22, 30, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    backdrop-filter: blur(10px);
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.metrics-row .metric:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(99, 102, 241, 0.1);
}

.metrics-row .metric-value {
    display: block;
    font-size: 2.25rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metrics-row .metric-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--space-xs);
}

/* Roadmap Box */
.roadmap-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(168, 85, 247, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 14px;
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
    box-shadow: 
        0 4px 24px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.roadmap-box h4 {
    color: #a5b4fc;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-lg);
}

.roadmap-box ul {
    margin: 0;
    padding-left: var(--space-xl);
}

.roadmap-box li {
    margin-bottom: var(--space-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* Conclusion CTA */
.conclusion-cta {
    text-align: center;
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    position: relative;
}

.conclusion-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(99, 102, 241, 0.4) 50%, 
        transparent 100%);
}

/* Responsive */
@media (max-width: 768px) {
    .paper-hero {
        padding: 90px 16px 40px !important;
    }
    
    .paper-badge {
        font-size: 9px;
        padding: 5px 10px;
        margin-bottom: 16px;
    }
    
    .paper-title {
        font-size: 1.5rem !important;
        margin-bottom: 12px;
    }
    
    .paper-subtitle {
        font-size: 0.95rem !important;
        line-height: 1.6;
    }
    
    .paper-meta {
        flex-direction: column;
        gap: 4px;
    }
    
    .paper-meta .meta-divider {
        display: none;
    }
    
    .paper-actions {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }
    
    .paper-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .paper-toc {
        padding: 16px;
        margin-bottom: 32px;
    }
    
    .paper-toc h3 {
        font-size: 0.8rem;
        margin-bottom: 12px;
    }
    
    .paper-toc ol {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .paper-toc a {
        font-size: 0.85rem;
        padding: 8px 12px;
    }
    
    .paper-content {
        padding: 32px 16px !important;
    }
    
    .paper-section {
        margin-bottom: 40px;
    }
    
    .paper-section h2 {
        font-size: 1.35rem !important;
        margin-bottom: 16px;
    }
    
    .paper-section h3 {
        font-size: 1.1rem;
    }
    
    .paper-section p {
        font-size: 0.95rem;
        line-height: 1.8;
    }
    
    .equation-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 16px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .equation {
        font-size: 0.9rem;
    }
    
    .equation-label {
        margin-left: 0;
        font-size: 0.75rem;
    }
    
    .data-table {
        font-size: 0.75rem;
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 10px;
        white-space: nowrap;
    }
    
    .figure-container {
        margin: 24px 0;
    }
    
    .figure-container img {
        max-width: 100%;
        border-radius: 8px;
    }
    
    .figure-caption {
        font-size: 0.8rem;
        padding: 0 8px;
    }
    
    .callout-box {
        padding: 16px;
        margin: 20px 0;
    }
    
    .callout-title {
        font-size: 0.9rem;
    }
    
    .callout-box p {
        font-size: 0.9rem;
    }
    
    blockquote {
        padding: 16px;
        margin: 20px 0;
        font-size: 0.95rem;
    }
    
    .roadmap-box {
        padding: 16px;
    }
    
    .roadmap-box h4 {
        font-size: 0.95rem;
    }
    
    .conclusion-cta {
        margin-top: 32px;
        padding-top: 32px;
    }
}

@media (max-width: 480px) {
    .paper-title {
        font-size: 1.35rem !important;
    }
    
    .paper-section h2 {
        font-size: 1.2rem !important;
    }
    
    .equation {
        font-size: 0.8rem;
    }
}

/* Paper Video Demo */
.paper-video {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.paper-video h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

.paper-video-wrapper {
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--color-bg-primary);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.paper-video-wrapper video {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.video-caption {
    margin-top: var(--space-md);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
    text-align: center;
}