/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --background-dark: #0f172a;
    --background-light: #1e293b;
    --card-background: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #475569;
    --code-background: #1e1e1e;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    padding: 40px 0;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header .subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
}

/* Version Navigation */
.version-nav {
    background-color: var(--background-light);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.version-tabs {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
}

.version-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px 25px;
    background-color: var(--card-background);
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 140px;
    color: var(--text-primary);
}

.version-tab:hover {
    background-color: #3b4a5f;
    transform: translateY(-2px);
}

.version-tab.active {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.2);
}

.version-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.version-title {
    font-size: 0.9rem;
    margin-top: 5px;
    text-align: center;
}

.version-lines {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 3px;
}

/* Main Content */
.main-content {
    padding: 40px 0;
}

.version-content {
    display: none;
}

.version-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Concept Panel */
.concept-panel {
    background-color: var(--background-light);
    border-radius: 16px;
    padding: 30px;
}

.concept-panel h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.concept-panel h3 {
    font-size: 1.2rem;
    margin: 25px 0 15px;
    color: var(--text-primary);
}

/* Philosophy Box */
.philosophy-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(16, 185, 129, 0.1));
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.philosophy-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.philosophy-box blockquote {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 10px;
    font-style: italic;
}

.philosophy-box p {
    color: var(--text-secondary);
}

/* Insight Cards */
.insight-card {
    background-color: var(--card-background);
    border-radius: 12px;
    padding: 20px;
    border-left: 4px solid var(--primary-color);
}

.insight-card.problem {
    border-left-color: var(--error-color);
}

.insight-card.solution {
    border-left-color: var(--success-color);
}

.highlight-text {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(16, 185, 129, 0.2));
    padding: 10px 15px;
    border-radius: 8px;
    margin-top: 15px;
}

/* Feature Table */
.feature-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.feature-table th,
.feature-table td {
    padding: 10px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.feature-table th {
    background-color: rgba(99, 102, 241, 0.2);
    font-weight: 600;
}

.feature-table code {
    background-color: var(--code-background);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Diagram Box */
.diagram-box {
    background-color: var(--card-background);
    border-radius: 12px;
    padding: 20px;
}

.diagram {
    background-color: var(--code-background);
    padding: 15px;
    border-radius: 8px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    color: #a5d6ff;
}

/* Proof List */
.proof-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.proof-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background-color: var(--card-background);
    padding: 15px;
    border-radius: 10px;
}

.proof-number {
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.tool-card {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s;
}

.tool-card:hover {
    transform: translateY(-3px);
}

.tool-name {
    font-family: 'Fira Code', monospace;
    font-weight: 700;
    color: var(--secondary-color);
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.tool-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.tool-example {
    font-size: 0.8rem;
    color: var(--accent-color);
}

/* Comparison Table */
.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 12px 15px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.comparison-table th {
    background-color: var(--primary-color);
}

.comparison-table tr:nth-child(even) {
    background-color: rgba(99, 102, 241, 0.1);
}

/* Constraints Grid */
.constraints-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

@media (max-width: 768px) {
    .constraints-grid {
        grid-template-columns: 1fr;
    }
}

.constraint-card {
    background: linear-gradient(135deg, var(--card-background), rgba(99, 102, 241, 0.2));
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.constraint-rule {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.constraint-why {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Quote Box */
.quote-box {
    background-color: var(--card-background);
    border-radius: 12px;
    padding: 25px;
    border-left: 4px solid var(--accent-color);
}

.quote-box blockquote {
    font-size: 1.2rem;
    font-style: italic;
    color: var(--accent-color);
    margin-bottom: 15px;
}

/* Agent Types Grid */
.agent-types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

@media (max-width: 768px) {
    .agent-types-grid {
        grid-template-columns: 1fr;
    }
}

.agent-type-card {
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.agent-type-card.explore {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.3), rgba(16, 185, 129, 0.1));
    border: 1px solid #10b981;
}

.agent-type-card.code {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(99, 102, 241, 0.1));
    border: 1px solid #6366f1;
}

.agent-type-card.plan {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.3), rgba(245, 158, 11, 0.1));
    border: 1px solid #f59e0b;
}

.agent-type-name {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.agent-type-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.agent-type-tools {
    font-size: 0.8rem;
    font-family: 'Fira Code', monospace;
    color: var(--text-primary);
}

/* Flow Diagram */
.flow-diagram {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.flow-step {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.flow-number {
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.flow-content {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 15px;
    flex-grow: 1;
}

.flow-result {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-top: 8px;
}

/* Layers Diagram */
.layers-diagram {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.layer {
    border-radius: 10px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.layer-1 {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.3), transparent);
    border-left: 4px solid var(--primary-color);
}

.layer-2 {
    background: linear-gradient(90deg, rgba(16, 185, 129, 0.3), transparent);
    border-left: 4px solid var(--secondary-color);
}

.layer-3 {
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.3), transparent);
    border-left: 4px solid var(--accent-color);
}

.layer-header {
    font-weight: 700;
}

.layer-tokens {
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.layer-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-basis: 100%;
}

/* Cache Diagram */
.cache-diagram {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .cache-diagram {
        grid-template-columns: 1fr;
    }
}

.cache-wrong,
.cache-right {
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.cache-wrong {
    background-color: rgba(239, 68, 68, 0.2);
    border: 2px solid var(--error-color);
}

.cache-right {
    background-color: rgba(34, 197, 94, 0.2);
    border: 2px solid var(--success-color);
}

.cache-label {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.cache-result {
    font-size: 0.9rem;
    margin-top: 10px;
    font-weight: 600;
}

.cache-wrong .cache-result {
    color: var(--error-color);
}

.cache-right .cache-result {
    color: var(--success-color);
}

/* Comparison Box */
.comparison-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .comparison-box {
        grid-template-columns: 1fr;
    }
}

.comparison-old,
.comparison-new {
    border-radius: 12px;
    padding: 20px;
}

.comparison-old {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
}

.comparison-new {
    background-color: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success-color);
}

.comparison-old h4,
.comparison-new h4 {
    margin-bottom: 15px;
    font-size: 1rem;
}

.comparison-old h4 {
    color: var(--error-color);
}

.comparison-new h4 {
    color: var(--success-color);
}

.comparison-old ul,
.comparison-new ul {
    list-style: none;
}

.comparison-old li,
.comparison-new li {
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.comparison-old li::before {
    content: "x";
    position: absolute;
    left: 0;
    color: var(--error-color);
}

.comparison-new li::before {
    content: "v";
    position: absolute;
    left: 0;
    color: var(--success-color);
}

/* Code Panel */
.code-panel {
    background-color: var(--code-background);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-height: 800px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: #2d2d2d;
    border-bottom: 1px solid var(--border-color);
}

.file-name {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.copy-btn {
    padding: 6px 12px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 6px;
    color: white;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background-color 0.2s;
}

.copy-btn:hover {
    background-color: var(--primary-dark);
}

.code-panel pre {
    overflow: auto;
    padding: 20px;
    flex-grow: 1;
    margin: 0;
}

.code-panel code {
    font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
}

/* FAQ Section */
.faq-section {
    margin-top: 40px;
}

.faq-section h2 {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: var(--primary-color);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (max-width: 1024px) {
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

.faq-card {
    background-color: var(--background-light);
    border-radius: 12px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background-color: var(--card-background);
    font-weight: 600;
    cursor: pointer;
}

.faq-icon {
    width: 30px;
    height: 30px;
    background-color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-answer {
    padding: 20px;
    color: var(--text-secondary);
}

.faq-answer p {
    margin-bottom: 15px;
}

.faq-answer ul,
.faq-answer ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.faq-answer li {
    margin-bottom: 8px;
}

.faq-answer table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.faq-answer th,
.faq-answer td {
    padding: 8px 12px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.faq-answer th {
    background-color: var(--card-background);
}

.faq-answer pre {
    background-color: var(--code-background);
    padding: 10px 15px;
    border-radius: 8px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    margin: 10px 0;
}

.faq-answer code {
    background-color: var(--code-background);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

/* Footer */
.footer {
    background-color: var(--background-light);
    padding: 50px 0 30px;
    margin-top: 50px;
    border-top: 1px solid var(--border-color);
}

.evolution-summary {
    margin-bottom: 40px;
}

.evolution-summary h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-align: center;
}

.evolution-table {
    overflow-x: auto;
}

.evolution-table table {
    width: 100%;
    border-collapse: collapse;
}

.evolution-table th,
.evolution-table td {
    padding: 15px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.evolution-table th {
    background-color: var(--primary-color);
}

.evolution-table tr:nth-child(even) {
    background-color: rgba(99, 102, 241, 0.1);
}

.evolution-table td:first-child {
    font-weight: 700;
    color: var(--primary-color);
}

.copyright {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Utility Classes */
code {
    font-family: 'Fira Code', 'Consolas', monospace;
}

strong {
    color: var(--text-primary);
}