:root {
    --bg-primary: #1a1410;
    --bg-secondary: #261d16;
    --bg-tertiary: #322820;
    --text-primary: #fef7e8;
    --text-secondary: #e8d4bb;
    --text-muted: #b89d7f;
    --accent-primary: #e6b87d;
    --accent-secondary: #d4a574;
    --accent-gradient: linear-gradient(135deg, #e6b87d 0%, #d4a574 100%);
    --wood: #4a3728;
    --leather: #5c3d2e;
    --paper: #fef7e8;
    --success: #8fb380;
    --warning: #e6b87d;
    --error: #d67d6a;
    --border-color: #4a3a2e;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-primary: #faf8f4;
    --bg-secondary: #f0ebe3;
    --bg-tertiary: #e6ddd1;
    --text-primary: #2a1f1a;
    --text-secondary: #4a3728;
    --text-muted: #6a5748;
    --accent-primary: #b8956a;
    --accent-secondary: #9a7a50;
    --accent-gradient: linear-gradient(135deg, #b8956a 0%, #9a7a50 100%);
    --border-color: #d4c4b0;
    --shadow: 0 4px 6px -1px rgba(42, 31, 26, 0.1), 0 2px 4px -1px rgba(42, 31, 26, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(42, 31, 26, 0.15), 0 4px 6px -2px rgba(42, 31, 26, 0.1);
}

[data-theme="light"] .results-container {
    --results-bg: #ffffff;
    --results-card-bg: #f5f5f5;
    --results-card-tertiary: #ebebeb;
    --results-text: #1a1a1a;
    --results-text-secondary: #4a4a4a;
    --results-text-muted: #6a6a6a;
    --results-border: #d0d0d0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Georgia', 'Garamond', 'Times New Roman', serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(212, 165, 116, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184, 149, 106, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(212, 165, 116, 0.03) 0%, transparent 30%);
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
}

[data-theme="light"] body::before {
    background-image:
        radial-gradient(circle at 20% 80%, rgba(184, 149, 106, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(154, 122, 80, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(184, 149, 106, 0.04) 0%, transparent 30%);
    opacity: 0.5;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.container.hero-mode {
    justify-content: center;
    align-items: center;
}

header {
    margin-bottom: 3rem;
}

.hero-mode header {
    margin-bottom: 0;
    margin-top: 6rem;
    width: 100%;
}

.hero-mode .header-content {
    flex-direction: column;
    align-items: center;
}

.hero-mode .header-controls {
    position: absolute;
    top: 2rem;
    right: 2rem;
}

.hero-mode h1 {
    display: block;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.hero-mode .logo {
    width: 80px;
    height: 80px;
    position: relative;
    top: -1em;
}

.logo:hover {
    transform: scale(1.05);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.github-link {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    text-decoration: none;
}

.github-link:hover {
    transform: scale(1.05);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.github-link svg {
    width: 24px;
    height: 24px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: font-size 0.4s ease;
}

.hero-mode h1 {
    font-size: 6rem;
    text-align: center;
    margin-bottom: 2rem;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    color: var(--text-primary);
}

.theme-toggle:hover {
    transform: scale(1.05);
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.theme-toggle:hover svg {
    color: var(--bg-primary);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    position: absolute;
    transition: var(--transition);
    stroke: var(--text-primary);
}

.sun-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

.moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

[data-theme="light"] .sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

main {
    flex: 1;
}

.hero-mode main {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.search-section {
    margin-bottom: 3rem;
}

.search-section.hero-mode {
    text-align: center;
    margin-bottom: 0;
    width: 100%;
}

.search-form {
    max-width: 800px;
    margin: 0 auto;
}

.search-input-wrapper {
    display: flex;
    gap: 1rem;
    background: var(--bg-secondary);
    padding: 0.5rem;
    border-radius: 1rem;
    border: 2px solid var(--border-color);
    transition: border-radius 0.4s ease, padding 0.4s ease, box-shadow 0.4s ease, border-color 0.3s ease;
    box-shadow: var(--shadow);
}

.hero-mode .search-input-wrapper {
    border-radius: 2rem;
    padding: 1rem;
    box-shadow: var(--shadow-lg);
}

.search-input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(212, 165, 116, 0.15);
}

#queryInput {
    flex: 1;
    background: transparent;
    border: none;
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    color: var(--text-primary);
    outline: none;
    transition: font-size 0.4s ease, padding 0.4s ease;
}

.hero-mode #queryInput {
    font-size: 1.3rem;
    padding: 1.25rem 2rem;
}

#queryInput::placeholder {
    color: var(--text-muted);
}

.search-button {
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 0.75rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: border-radius 0.4s ease, padding 0.4s ease, font-size 0.4s ease, transform 0.3s ease, box-shadow 0.3s ease;
    white-space: nowrap;
}

.hero-mode .search-button {
    border-radius: 1.5rem;
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

.search-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: var(--shadow-lg), 0 0 20px rgba(212, 165, 116, 0.5);
    }
}

.search-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.search-button svg {
    width: 20px;
    height: 20px;
}

.results-container {
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    pointer-events: none;
    display: none;
    --results-bg: #1f1f1f;
    --results-card-bg: #2a2a2a;
    --results-card-tertiary: #353535;
    --results-text: #ffffff;
    --results-text-secondary: #e0e0e0;
    --results-text-muted: #b0b0b0;
    --results-border: #404040;
}

.results-container.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
    display: block;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
}

.results-container.visible .result-card:nth-child(1) {
    animation: slideInUp 0.4s ease-out 0.1s both;
}

.results-container.visible .result-card:nth-child(2) {
    animation: slideInUp 0.4s ease-out 0.2s both;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-card {
    background: var(--results-card-bg);
    border: 2px solid var(--results-border);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.result-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--results-border);
}

.card-header h2 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--results-text);
}

.card-header svg {
    width: 28px;
    height: 28px;
    color: var(--accent-primary);
}

.badge-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.speed-badge {
    padding: 0.375rem 0.875rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.speed-badge.fast {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.speed-badge.accurate {
    background: rgba(184, 149, 106, 0.25);
    color: var(--accent-secondary);
}

.time-badge {
    padding: 0.375rem 0.875rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    background: rgba(212, 165, 116, 0.2);
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
    letter-spacing: 0.5px;
}

.info-icon {
    background: transparent;
    border: none;
    padding: 0;
    cursor: help;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-left: 0.25rem;
}

.info-icon svg {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: var(--transition);
}

.info-icon:hover svg {
    color: var(--accent-primary);
}

.info-icon .tooltip {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    width: 280px;
    text-align: left;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--border-color);
    z-index: 1000;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.info-icon .tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border-color);
}

.info-icon .tooltip::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-2px);
    border: 6px solid transparent;
    border-top-color: var(--bg-tertiary);
    z-index: 1;
}

.info-icon:hover .tooltip,
.info-icon:focus .tooltip {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.card-content {
    min-height: 200px;
}

.loader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    gap: 1rem;
}

.loader-container.hidden {
    display: none;
}

.loader {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-container p {
    color: var(--results-text-secondary);
    font-size: 0.95rem;
}

.results-list {
    display: none;
}

.results-list.visible {
    display: block;
}

.embedding-item {
    background: var(--results-card-tertiary);
    border: 1px solid var(--results-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.embedding-item:hover {
    background: var(--results-card-bg);
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.embedding-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.embedding-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
    text-decoration: none;
    transition: var(--transition);
}

.embedding-number:hover {
    color: var(--accent-secondary);
    text-decoration: none;
    text-shadow: 0 0 8px rgba(184, 149, 106, 0.4);
}

.embedding-score {
    background: var(--accent-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    flex-shrink: 0;
}

.embedding-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--results-text);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.embedding-breadcrumb {
    color: var(--results-text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--results-border);
}

.progress-container {
    display: none;
    margin-bottom: 1.5rem;
}

.progress-container.visible {
    display: block;
}

.progress-step {
    background: var(--results-card-tertiary);
    border: 1px solid var(--results-border);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideIn 0.3s ease-out;
    transition: var(--transition);
}

.progress-step.active {
    border-color: var(--accent-primary);
    background: var(--results-card-bg);
}

.progress-step.placeholder {
    border-style: dashed;
    opacity: 0.7;
}

.progress-step.placeholder .step-icon {
    background: var(--results-card-tertiary);
    border: 2px dashed var(--accent-primary);
    border-radius: 20px;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.step-icon {
    min-width: 52px;
    width: 52px;
    height: 40px;
    border-radius: 20px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
    padding: 0 0.5rem;
    text-decoration: none;
}

.step-content {
    flex: 1;
}

.step-label {
    font-size: 0.85rem;
    color: var(--results-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.step-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--results-text);
    margin-top: 0.25rem;
}

.step-breadcrumb {
    font-size: 0.9rem;
    color: var(--results-text-secondary);
    margin-top: 0.25rem;
}

.classification-result {
    display: none;
}

.classification-result.visible {
    display: block;
    margin-bottom: 1.5rem;
}

.final-result {
    background: #1a1a1a;
    border: 2px solid var(--accent-primary);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    color: #ffffff;
    animation: scaleIn 0.4s ease-out;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(230, 184, 125, 0.2);
}

[data-theme="light"] .final-result {
    background: #ffffff;
    border: 2px solid var(--accent-primary);
    color: #1a1a1a;
    box-shadow: 0 0 30px rgba(184, 149, 106, 0.15);
}

[data-theme="light"] .final-result-label {
    color: var(--accent-secondary);
}

[data-theme="light"] .final-result-number {
    color: var(--accent-primary);
}

[data-theme="light"] .final-result-number:hover {
    color: var(--accent-secondary);
}

[data-theme="light"] .final-result-name {
    color: #1a1a1a;
}

[data-theme="light"] .final-result-path {
    color: #4a4a4a;
    border-top: 1px solid rgba(184, 149, 106, 0.3);
}

.final-result::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(230, 184, 125, 0.15), transparent);
    animation: shine 2s ease-in-out 1 forwards;
    opacity: 1;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
        opacity: 0;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.final-result-label {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.final-result-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-decoration: none;
    color: var(--accent-primary);
    transition: var(--transition);
    display: block;
}

.final-result-number:hover {
    transform: scale(1.05);
    text-decoration: none;
    color: var(--accent-secondary);
}

.final-result-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ffffff;
}

.final-result-path {
    font-size: 1rem;
    color: #e0e0e0;
    padding-top: 1rem;
    border-top: 1px solid rgba(230, 184, 125, 0.3);
}

.error-message {
    display: none;
    background: rgba(239, 68, 68, 0.1);
    border: 2px solid var(--error);
    border-radius: 0.75rem;
    padding: 1.25rem;
    color: var(--error);
    animation: slideIn 0.3s ease-out;
}

.error-message.visible {
    display: block;
}

.error-message strong {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
}

.hero-mode footer {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    border: none;
    margin-top: 0;
    padding-top: 0;
}

@media (max-width: 1200px) {
    .results-grid {
        grid-template-columns: 1fr;
        display: flex;
        flex-direction: column;
    }

    .gpt-card {
        order: 1;
    }

    .embeddings-card {
        order: 2;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .logo {
        width: 40px;
        height: 40px;
    }

    .hero-mode .logo {
        width: 64px;
        height: 64px;
    }

    h1 {
        font-size: 2rem;
    }

    .hero-mode h1 {
        font-size: 4rem;
    }

    .search-input-wrapper {
        flex-direction: column;
        gap: 0.5rem;
    }

    .search-button {
        width: 100%;
        justify-content: center;
    }

    .results-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .final-result-number {
        font-size: 2.5rem;
    }

    .final-result-name {
        font-size: 1.25rem;
    }

    .hero-mode header {
        top: 1rem;
        right: 1rem;
    }

    .hero-mode footer {
        bottom: 1rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    .hero-mode h1 {
        font-size: 3rem;
    }

    #queryInput {
        font-size: 1rem;
        padding: 0.875rem 1rem;
    }

    .search-button {
        padding: 0.875rem 1.5rem;
    }

    .hero-mode #queryInput {
        font-size: 1.1rem;
        padding: 1rem 1.5rem;
    }

    .hero-mode .search-button {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
}

.decorative-books {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.8s ease;
}

.decorative-books.faded {
    opacity: 0.3;
}

.decorative-books:not(.faded) .book {
    will-change: transform;
}

.book {
    position: absolute;
    width: 40px;
    height: 60px;
    background: linear-gradient(90deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: 2px;
    opacity: 0.15;
    animation: float-vertical 20s ease-in-out infinite;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.book::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255, 255, 255, 0.3);
}

.book::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 8px;
    right: 8px;
    height: 2px;
    background: rgba(255, 255, 255, 0.2);
}

.book:nth-child(1) {
    top: 20%;
    left: 5%;
    animation-delay: 0s;
    transform: rotate(15deg);
}

.book:nth-child(2) {
    top: 70%;
    left: 10%;
    animation-delay: -3s;
    transform: rotate(-10deg);
    opacity: 0.12;
}

.book:nth-child(3) {
    top: 40%;
    left: 85%;
    animation-delay: -7s;
    transform: rotate(20deg);
}

.book:nth-child(4) {
    top: 80%;
    left: 90%;
    animation-delay: -12s;
    transform: rotate(-15deg);
    opacity: 0.1;
}

.book:nth-child(5) {
    top: 25%;
    left: 15%;
    animation-delay: -5s;
    transform: rotate(-25deg);
    opacity: 0.13;
}

.book:nth-child(6) {
    top: 60%;
    left: 80%;
    animation-delay: -10s;
    transform: rotate(12deg);
}

.book:nth-child(7) {
    top: 15%;
    left: 92%;
    animation-delay: -2s;
    transform: rotate(-8deg);
    opacity: 0.11;
}

.book:nth-child(8) {
    top: 50%;
    left: 3%;
    animation-delay: -6s;
    transform: rotate(18deg);
    opacity: 0.14;
}

.book:nth-child(9) {
    top: 85%;
    left: 20%;
    animation-delay: -9s;
    transform: rotate(-12deg);
}

.book:nth-child(10) {
    top: 35%;
    left: 70%;
    animation-delay: -14s;
    transform: rotate(22deg);
    opacity: 0.12;
}

.book:nth-child(11) {
    top: 90%;
    left: 60%;
    animation-delay: -11s;
    transform: rotate(16deg);
    opacity: 0.11;
}

@keyframes float-vertical {
    0%, 100% {
        transform: translateY(0) rotate(var(--rotation, 0deg));
    }
    50% {
        transform: translateY(-30px) rotate(var(--rotation, 0deg));
    }
}

.ddc-numbers {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.8s ease;
}

.ddc-numbers.faded {
    opacity: 0.3;
}

.ddc-number {
    position: absolute;
    font-family: 'Courier New', monospace;
    font-weight: 700;
    font-size: 4rem;
    color: var(--accent-primary);
    opacity: 0.08;
}

.ddc-number:nth-child(1) {
    top: 5%;
    left: -10%;
    animation: float-right 35s linear infinite;
    animation-delay: 0s;
}

.ddc-number:nth-child(2) {
    top: 25%;
    right: -15%;
    animation: float-left 28s linear infinite;
    animation-delay: -10s;
    font-size: 3rem;
}

.ddc-number:nth-child(3) {
    bottom: 10%;
    left: -12%;
    animation: float-up-right 32s linear infinite;
    animation-delay: -20s;
    font-size: 3.5rem;
}

.ddc-number:nth-child(4) {
    top: 65%;
    left: -8%;
    animation: float-diagonal 25s linear infinite;
    animation-delay: -7s;
    font-size: 4.5rem;
}

.ddc-number:nth-child(5) {
    bottom: 5%;
    right: -10%;
    animation: float-up-left 38s linear infinite;
    animation-delay: -17s;
    font-size: 3.8rem;
}

.ddc-number:nth-child(6) {
    top: 15%;
    left: -12%;
    animation: float-down-right 30s linear infinite;
    animation-delay: -27s;
    font-size: 3.2rem;
}

.ddc-number:nth-child(7) {
    top: 55%;
    right: -8%;
    animation: float-left 27s linear infinite;
    animation-delay: -4s;
    font-size: 4rem;
}

.ddc-number:nth-child(8) {
    bottom: 30%;
    left: -14%;
    animation: float-right 33s linear infinite;
    animation-delay: -14s;
    font-size: 3.3rem;
}

@keyframes float-diagonal {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(120vw, 50vh);
    }
}

@keyframes float-right {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(130vw, 10vh);
    }
}

@keyframes float-left {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(-130vw, 15vh);
    }
}

@keyframes float-up-right {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(125vw, -80vh);
    }
}

@keyframes float-up-left {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(-125vw, -70vh);
    }
}

@keyframes float-down-right {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(120vw, 80vh);
    }
}

@media (max-width: 768px) {
    .book {
        width: 30px;
        height: 45px;
    }

    .ddc-number {
        font-size: 2.5rem;
    }

    .ddc-number:nth-child(2),
    .ddc-number:nth-child(3) {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .ddc-number {
        font-size: 2rem;
    }
}