/* ===========================
   CSS VARIABLES - MINIMALIST
   =========================== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease;
}

/* ===========================
   RESET & BASE STYLES
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

img,
video,
iframe,
embed,
object {
    max-width: 100%;
    height: auto;
}

pre,
code {
    max-width: 100%;
    overflow-x: auto;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    margin-left: 250px;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 40px;
    width: 100%;
    box-sizing: border-box;
}

/* ===========================
   HEADER - MINIMALIST
   =========================== */
.header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 40px 20px;
    text-align: center;
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.header .subtitle {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.header .author {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===========================
   RESUMO EXECUTIVO
   =========================== */
.summary-section {
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 40px 20px;
}

.summary-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 20px;
    text-align: center;
}

.summary-content {
    max-width: 1000px;
    margin: 0 auto;
}

.summary-intro {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 30px;
    text-align: center;
}

.summary-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.summary-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    transition: var(--transition);
}

.summary-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.summary-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.summary-card p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-color);
}

.summary-footer {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    padding: 20px;
    margin-top: 20px;
}

.summary-footer p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-color);
    margin: 0;
}

/* ===========================
   SIDEBAR NAVIGATION
   =========================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    height: 100vh;
    background-color: var(--bg-color);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    z-index: 1000;
}

.nav-list {
    list-style: none;
    padding: 20px 0;
}

.nav-list li {
    margin: 0;
}

.nav-link {
    display: block;
    padding: 12px 24px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

.nav-link.active {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

/* ===========================
   MAIN CONTENT - MINIMALIST
   =========================== */
.main-content {
    padding: 40px 0 60px 0;
}

.section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 1.8rem;
    color: var(--text-color);
    margin-bottom: 30px;
    font-weight: 600;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.content-block {
    margin-bottom: 40px;
}

.content-block h3 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin-bottom: 16px;
    margin-top: 32px;
    font-weight: 600;
}

.content-block h4 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 12px;
    margin-top: 20px;
    font-weight: 600;
}

.content-block h5 {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 10px;
    margin-top: 16px;
    font-weight: 600;
}

.content-block p {
    margin-bottom: 16px;
    color: var(--text-color);
    font-size: 1rem;
    line-height: 1.7;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
}

.content-block ul {
    margin-left: 24px;
    margin-bottom: 16px;
    max-width: 100%;
}

.content-block li {
    margin-bottom: 8px;
    color: var(--text-color);
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.content-block code {
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--primary-color);
}

/* ===========================
   BOXES - MINIMALIST
   =========================== */
.highlight-box {
    background-color: var(--bg-secondary);
    border-left: 3px solid var(--primary-color);
    padding: 20px;
    margin: 24px 0;
    border-radius: 4px;
}

.highlight-box p {
    margin-bottom: 0;
}

.definition-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 4px;
    margin: 24px 0;
}

.definition-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 10px;
    font-size: 1rem;
}

.challenge-box {
    background-color: #fef2f2;
    border-left: 3px solid #ef4444;
    padding: 20px;
    margin: 24px 0;
    border-radius: 4px;
}

.challenge-box h4 {
    color: #dc2626;
    margin-bottom: 12px;
}

/* ===========================
   GRIDS & CARDS - MINIMALIST
   =========================== */
.info-grid,
.components-grid,
.benefits-grid,
.principles-grid,
.advantages-grid,
.implementations-grid,
.challenges-grid,
.proxy-types-grid,
.metrics-analyzed {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 20px;
    margin: 24px 0;
    width: 100%;
}

.info-card,
.component-card,
.benefit-card,
.principle-card,
.advantage-card,
.impl-card,
.challenge-card,
.proxy-type-card,
.analyzed-metric {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    width: 100%;
    box-sizing: border-box;
}

.info-card:hover,
.component-card:hover,
.benefit-card:hover,
.advantage-card:hover,
.impl-card:hover {
    border-color: var(--primary-color);
}

.info-card h4,
.component-card h3,
.benefit-card h4,
.principle-card h4,
.advantage-card h5,
.impl-card h5,
.proxy-type-card h5 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.1rem;
    font-weight: 600;
}

.component-examples {
    background-color: var(--bg-color);
    padding: 12px;
    border-radius: 4px;
    margin-top: 12px;
    border: 1px solid var(--border-color);
}

.component-examples h4 {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

/* ===========================
   COMPARISON
   =========================== */
.comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 20px;
    margin: 24px 0;
    width: 100%;
}

.comparison-item {
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    width: 100%;
    box-sizing: border-box;
}

.comparison-item h4 {
    margin-bottom: 12px;
    font-size: 1.1rem;
    font-weight: 600;
}

.comparison-item.old h4 {
    color: #dc2626;
}

.comparison-item.new h4 {
    color: #059669;
}

/* ===========================
   TECHNOLOGY CARDS
   =========================== */
.technology-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 20px;
    margin: 24px 0;
    width: 100%;
}

.tech-card {
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    width: 100%;
    box-sizing: border-box;
}

.tech-card h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===========================
   ARCHITECTURE DIAGRAM
   =========================== */
.architecture-diagram {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    margin: 24px 0;
    border: 1px solid var(--border-color);
}

.architecture-diagram h3 {
    text-align: center;
    color: var(--text-color);
    margin-bottom: 24px;
    font-size: 1.3rem;
}

.diagram-flow {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 16px;
    width: 100%;
}

.flow-item {
    background-color: var(--bg-color);
    padding: 16px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    text-align: center;
    min-width: 100px;
    max-width: 150px;
    flex: 1 1 120px;
}

.flow-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.flow-item h4 {
    color: var(--primary-color);
    margin-bottom: 4px;
    font-size: 1rem;
}

.flow-item p {
    color: var(--text-light);
    font-size: 0.85rem;
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--text-light);
}

/* ===========================
   DESIGN PRINCIPLES
   =========================== */
.design-principles {
    display: grid;
    gap: 16px;
    margin: 24px 0;
}

.design-card {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
    display: flex;
    align-items: start;
    gap: 16px;
}

.design-number,
.step-number,
.point-number {
    background-color: var(--primary-color);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.design-card h4 {
    color: var(--text-color);
    margin-bottom: 8px;
    font-size: 1rem;
}

/* ===========================
   PLANES & COMPONENTS
   =========================== */
.data-plane,
.control-plane {
    margin: 24px 0;
}

.plane-component,
.control-component {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 4px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.router-info {
    display: grid;
    gap: 12px;
    margin-top: 12px;
}

.router-item {
    background-color: var(--bg-color);
    padding: 12px;
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.insertion-modes {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    flex-wrap: wrap;
    width: 100%;
}

.mode-card {
    flex: 1 1 200px;
    min-width: min(100%, 200px);
    background-color: var(--bg-color);
    padding: 16px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    text-align: center;
    box-sizing: border-box;
}

.mode-card h5 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 1rem;
}

/* ===========================
   SR TYPES
   =========================== */
.sr-types {
    display: flex;
    gap: 20px;
    margin: 24px 0;
    flex-wrap: wrap;
    width: 100%;
}

.sr-type-card {
    flex: 1 1 250px;
    min-width: min(100%, 250px);
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    box-sizing: border-box;
}

.sr-type-card h4 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.sr-type-card .detail {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 8px;
}

/* ===========================
   NETWORK PROGRAMMING
   =========================== */
.network-programming {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    margin: 24px 0;
    border: 1px solid var(--border-color);
}

.sid-structure {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 4px;
    margin-top: 16px;
    border: 1px solid var(--border-color);
}

.sid-structure h4 {
    text-align: center;
    color: var(--text-color);
    margin-bottom: 20px;
}

.sid-fields {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    width: 100%;
}

.sid-field {
    text-align: center;
    padding: 12px;
    flex-shrink: 0;
}

.field-name {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.sid-separator {
    font-size: 1.5rem;
    color: var(--text-light);
    font-weight: bold;
}

/* ===========================
   VNF TYPES
   =========================== */
.vnf-types {
    display: flex;
    gap: 20px;
    margin: 24px 0;
    flex-wrap: wrap;
    width: 100%;
}

.vnf-type-card {
    flex: 1 1 250px;
    min-width: min(100%, 250px);
    padding: 20px;
    border-radius: 4px;
    text-align: center;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    box-sizing: border-box;
}

.vnf-type-card h4 {
    margin-bottom: 8px;
    font-size: 1.1rem;
    color: var(--primary-color);
}

/* ===========================
   PROXY PROCESS
   =========================== */
.proxy-explanation {
    margin: 24px 0;
}

.proxy-process {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 12px;
    margin: 24px 0;
    padding: 24px;
    background-color: var(--bg-secondary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    width: 100%;
}

.process-step {
    text-align: center;
    max-width: 140px;
    flex: 0 1 auto;
}

.process-arrow {
    font-size: 1.5rem;
    color: var(--text-light);
}

/* ===========================
   DESIGN MODES
   =========================== */
.design-modes {
    display: grid;
    gap: 16px;
    margin: 24px 0;
}

.mode-item {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.mode-item h4 {
    color: var(--text-color);
    margin-bottom: 8px;
}

/* ===========================
   PERFORMANCE SECTION
   =========================== */
.metrics-importance {
    margin: 24px 0;
}

.metrics-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
}

.metric-item {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.srperf-description {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    margin: 24px 0;
    border: 1px solid var(--border-color);
}

.srperf-architecture {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 16px;
    margin: 20px 0;
    width: 100%;
}

.srperf-component {
    flex: 1 1 250px;
    min-width: min(100%, 250px);
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
}

.srperf-component h4 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.srperf-arrow {
    font-size: 2rem;
    color: var(--text-light);
}

.orchestrator-box {
    background-color: var(--bg-color);
    padding: 16px;
    border-radius: 4px;
    margin-top: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.orchestrator-box h4 {
    color: var(--primary-color);
    margin-bottom: 8px;
}

.methodology {
    margin: 24px 0;
}

.results-section {
    margin: 24px 0;
}

.linux-results {
    display: grid;
    gap: 16px;
    margin: 20px 0;
}

.result-card {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.result-card h5 {
    color: var(--text-color);
    margin-bottom: 8px;
}

.vpp-results {
    margin: 20px 0;
}

.performance-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 20px;
    margin: 20px 0;
    width: 100%;
}

.comparison-col {
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    width: 100%;
    box-sizing: border-box;
}

.comparison-col h5 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    text-align: center;
    color: var(--primary-color);
}

.conclusions-box {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* ===========================
   COEXISTENCE
   =========================== */
.coexistence-section {
    margin: 24px 0;
}

.technology-comparison {
    display: grid;
    gap: 24px;
    margin: 24px 0;
}

.tech-comparison-card {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.tech-comparison-card h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.tech-details h5 {
    color: var(--text-color);
    margin-top: 16px;
    margin-bottom: 8px;
    font-size: 1rem;
}

.final-considerations {
    display: grid;
    gap: 20px;
    margin: 24px 0;
}

.consideration-box {
    padding: 20px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.consideration-box h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--text-color);
}

/* ===========================
   CONCLUSION SECTION
   =========================== */
.conclusion-intro {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.key-points {
    display: grid;
    gap: 16px;
    margin: 24px 0;
}

.key-point-card {
    display: flex;
    gap: 16px;
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.key-point-card h4 {
    color: var(--text-color);
    margin-bottom: 8px;
}

.future-vision {
    margin: 24px 0;
}

.vision-box {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.vision-box h4 {
    color: var(--text-color);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.future-applications {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 20px;
    width: 100%;
}

.app-item {
    text-align: center;
    flex: 0 1 auto;
}

.app-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.research-box {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.research-box h4 {
    color: var(--text-color);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.final-statement {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    margin: 24px 0;
}

.final-statement h3 {
    color: var(--text-color);
    margin-bottom: 16px;
}

.closing {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-top: 16px;
}

.author-card {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 4px;
    text-align: center;
    border: 1px solid var(--border-color);
    margin-top: 32px;
}

.author-card h3 {
    margin-bottom: 16px;
    font-size: 1.3rem;
    color: var(--text-color);
}

.author-card p {
    font-size: 0.95rem;
    margin-bottom: 6px;
    color: var(--text-color);
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 24px 20px;
    text-align: center;
    margin-top: 40px;
}

.footer p {
    margin-bottom: 4px;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===========================
   SCROLL TO TOP BUTTON
   =========================== */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

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

/* ===========================
   DARK MODE TOGGLE
   =========================== */
#dark-mode-toggle {
    position: fixed;
    bottom: 90px;
    right: 30px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    z-index: 999;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

#dark-mode-toggle:hover {
    background-color: var(--primary-dark);
}

body.dark-mode {
    --bg-color: #111827;
    --bg-secondary: #1f2937;
    --text-color: #f9fafb;
    --text-light: #9ca3af;
    --border-color: #374151;
}

body.dark-mode .sidebar {
    background-color: #1f2937;
}

body.dark-mode .header {
    background-color: #111827;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

/* Medium desktop (1366x768 and similar resolutions) */
@media (max-width: 1366px) and (min-width: 1025px) {
    body {
        margin-left: 240px;
    }

    .sidebar {
        width: 240px;
    }

    .container {
        max-width: 800px;
        padding: 0 30px;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .content-block h3 {
        font-size: 1.3rem;
    }

    .content-block h4 {
        font-size: 1.05rem;
    }

    .content-block p,
    .content-block li {
        font-size: 0.98rem;
    }

    .info-grid,
    .components-grid,
    .benefits-grid,
    .principles-grid,
    .advantages-grid,
    .implementations-grid,
    .challenges-grid,
    .proxy-types-grid,
    .metrics-analyzed {
        grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
        gap: 18px;
    }

    .info-card,
    .component-card,
    .benefit-card,
    .principle-card,
    .advantage-card,
    .impl-card,
    .challenge-card,
    .proxy-type-card,
    .analyzed-metric {
        padding: 18px;
    }

    .architecture-diagram,
    .network-programming,
    .srperf-description {
        padding: 20px;
    }

    .highlight-box,
    .definition-box,
    .challenge-box {
        padding: 18px;
        margin: 20px 0;
    }

    .flow-item {
        min-width: 90px;
        max-width: 130px;
        padding: 14px;
    }

    .srperf-component {
        padding: 18px;
    }

    .mode-card {
        flex: 1 1 180px;
        min-width: min(100%, 180px);
        padding: 14px;
    }
}

/* Tablets and small laptops */
@media (max-width: 1024px) {
    body {
        margin-left: 0;
        padding-top: 60px;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: fixed;
        top: 0;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        z-index: 1001;
        overflow-x: auto;
    }

    .nav-list {
        display: flex;
        padding: 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    .nav-list::-webkit-scrollbar {
        height: 4px;
    }

    .nav-list::-webkit-scrollbar-track {
        background: var(--bg-secondary);
    }

    .nav-list::-webkit-scrollbar-thumb {
        background: var(--primary-color);
        border-radius: 2px;
    }

    .nav-list li {
        flex-shrink: 0;
    }

    .nav-link {
        padding: 16px 20px;
        border-left: none;
        border-bottom: 3px solid transparent;
        white-space: nowrap;
    }

    .nav-link.active {
        border-left: none;
        border-bottom-color: var(--primary-color);
    }

    .header {
        margin-top: 60px;
    }

    .container {
        padding: 0 24px;
    }

    .main-content {
        padding: 30px 0 50px 0;
    }
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 0.9rem;
    }

    .header .author {
        font-size: 0.85rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .content-block h3 {
        font-size: 1.2rem;
    }

    .content-block h4 {
        font-size: 1rem;
    }

    .container {
        padding: 0 16px;
    }

    .diagram-flow {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .flow-item {
        max-width: 100%;
        width: 100%;
    }

    .proxy-process {
        flex-direction: column;
        padding: 16px;
    }

    .process-arrow {
        transform: rotate(90deg);
    }

    .process-step {
        max-width: 100%;
    }

    .srperf-architecture {
        flex-direction: column;
    }

    .srperf-arrow {
        transform: rotate(90deg);
    }

    .sid-separator {
        font-size: 1.2rem;
    }

    .field-name {
        font-size: 0.85rem;
        padding: 6px 12px;
    }

    .benefit-icon,
    .advantage-icon {
        font-size: 2rem;
    }

    .app-icon {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.3rem;
    }

    .header .subtitle {
        font-size: 0.85rem;
    }

    .header .author {
        font-size: 0.8rem;
    }

    .section-title {
        font-size: 1.2rem;
    }

    .content-block h3 {
        font-size: 1.1rem;
    }

    .content-block h4 {
        font-size: 0.95rem;
    }

    .content-block p,
    .content-block li {
        font-size: 0.95rem;
    }

    .container {
        padding: 0 12px;
    }

    .scroll-top-btn,
    #dark-mode-toggle {
        width: 44px;
        height: 44px;
        right: 16px;
        font-size: 1.2rem;
    }

    #dark-mode-toggle {
        bottom: 80px;
    }

    .info-grid,
    .components-grid,
    .benefits-grid,
    .principles-grid,
    .advantages-grid,
    .implementations-grid,
    .challenges-grid,
    .proxy-types-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .info-card,
    .component-card,
    .benefit-card,
    .challenge-card {
        padding: 16px;
    }

    .architecture-diagram,
    .network-programming,
    .srperf-description,
    .proxy-process {
        padding: 16px;
    }

    .design-number,
    .step-number,
    .point-number {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }

    .nav-link {
        padding: 14px 16px;
        font-size: 0.9rem;
    }

    .metric-item {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
}