/* ============================================
   Web Architecture Mapping - Tumauini AgriRice
   Matching System Color Scheme
   ============================================ */

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

/* Back Button */
.back-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #2d7a4f;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 12px 24px;
    border-radius: 8px;
    background: rgba(45, 122, 79, 0.1);
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.back-button:hover {
    background: #2d7a4f;
    color: white;
    transform: translateX(-5px);
}

.back-button i {
    font-size: 1.2rem;
}

:root {
    /* Primary Colors - Matching System */
    --primary-green: #2d7a4f;
    --dark-green: #1a4d2e;
    --light-green: #4caf50;
    --success: #28a745;
    
    /* Accent Colors */
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --secondary: #6c757d;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-bg: #f5f5f5;
    --gray: #666666;
    --dark-gray: #333333;
    --border: #ddd;
    
    /* Gradient for layers */
    --gradient-client: linear-gradient(135deg, #2d7a4f 0%, #1a4d2e 100%);
    --gradient-server: linear-gradient(135deg, #4caf50 0%, #2d7a4f 100%);
    --gradient-app: linear-gradient(135deg, #28a745 0%, #1e7e34 100%);
    --gradient-db: linear-gradient(135deg, #17a2b8 0%, #117a8b 100%);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 600;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 15px 35px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 50%, #a5d6a7 100%);
    color: var(--dark-gray);
    line-height: 1.7;
    padding: var(--spacing-xl) var(--spacing-lg);
    min-height: 100vh;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    background: var(--gradient-client);
    color: var(--white);
    padding: var(--spacing-xxl) var(--spacing-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><path d="M0 0h100v100H0z" fill="none"/><path d="M50 10L60 30L80 35L65 50L68 70L50 60L32 70L35 50L20 35L40 30z" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.3;
}

.header-content {
    position: relative;
    z-index: 1;
}

.header-content h1 {
    font-size: 2.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.header-content h1 i {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.9);
}

.header-content h2 {
    font-size: 2rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.85;
    font-weight: var(--font-weight-normal);
    letter-spacing: 0.3px;
}

/* ============================================
   ARCHITECTURE DIAGRAM
   ============================================ */
.architecture-diagram {
    padding: var(--spacing-xxl) var(--spacing-xl);
    background: linear-gradient(to bottom, #fafafa 0%, #ffffff 100%);
}

/* ============================================
   LAYER STYLES
   ============================================ */
.layer {
    background: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.layer:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-green);
}

.layer-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.layer-header::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(50%, -50%);
}

.layer-header i {
    font-size: 2.5rem;
    z-index: 1;
}

.layer-header h3 {
    margin: 0;
    z-index: 1;
    letter-spacing: 0.5px;
}

.layer-content {
    padding: var(--spacing-xl);
    background: var(--white);
}

/* ============================================
   CLIENT LAYER - Green Theme
   ============================================ */
.client-layer .layer-header {
    background: var(--gradient-client);
}

.component-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.component {
    background: linear-gradient(to bottom right, #f1f8f4, #ffffff);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.component::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-green);
    opacity: 0;
    transition: var(--transition);
}

.component:hover {
    border-color: var(--primary-green);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.component:hover::before {
    opacity: 0.05;
}

.component i {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-green);
    transition: var(--transition);
}

.component:hover i {
    transform: scale(1.15);
}

.component h4 {
    margin: var(--spacing-md) 0;
    color: var(--dark-green);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
}

.component p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
}

.component ul {
    list-style: none;
    text-align: left;
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
}

.component ul li {
    padding: var(--spacing-xs) 0;
    color: var(--gray);
    position: relative;
    padding-left: var(--spacing-lg);
}

.component ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ============================================
   SERVER LAYER - Light Green Theme
   ============================================ */
.server-layer .layer-header {
    background: var(--gradient-server);
}

.server-config h4 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
}

.config-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.config-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(to right, #f1f8f4, #ffffff);
    border-radius: var(--radius-md);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.config-item:hover {
    background: linear-gradient(to right, #e8f5e9, #f1f8f4);
    border-left-color: var(--light-green);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.config-item i {
    font-size: 1.5rem;
    color: var(--light-green);
    min-width: 24px;
}

.config-item span {
    color: var(--dark-gray);
    font-size: 0.95rem;
    line-height: 1.5;
}
/* ============================================
   APPLICATION LAYER - Success Green Theme
   ============================================ */
.application-layer .layer-header {
    background: var(--gradient-app);
}

.app-sections {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
}

.app-section {
    background: linear-gradient(to bottom, #f8fdf9, #ffffff);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.app-section h4 {
    margin-bottom: var(--spacing-lg);
    color: var(--success);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.2rem;
    font-weight: var(--font-weight-bold);
}

.app-section ul {
    list-style: none;
}

.app-section ul li {
    padding: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--dark-gray);
    font-size: 0.95rem;
}

.app-section ul li i {
    color: var(--success);
    font-size: 1rem;
}

.endpoint-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-sm);
}

.endpoint {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xs);
    transition: var(--transition);
    border: 1px solid var(--border);
    cursor: pointer;
}

.endpoint:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-green);
}

.method {
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.5px;
}

.method.get {
    background: var(--success);
    color: var(--white);
}

.method.post {
    background: var(--info);
    color: var(--white);
}

.method.put {
    background: var(--warning);
    color: var(--dark-gray);
}

.method.crud {
    background: var(--secondary);
    color: var(--white);
}

/* ============================================
   DATABASE LAYER - Info Blue/Cyan Theme
   ============================================ */
.database-layer .layer-header {
    background: var(--gradient-db);
}

.db-info {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: linear-gradient(to bottom, #e0f7fa, #ffffff);
    border-radius: var(--radius-md);
    border: 1px solid #b2ebf2;
}

.db-info h4 {
    color: var(--info);
    font-size: 1.6rem;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-bold);
}

.db-info p {
    color: var(--gray);
    font-size: 1rem;
}

.db-info p i {
    color: var(--info);
    margin: 0 var(--spacing-xs);
}

.tables-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.table-card {
    background: linear-gradient(to bottom right, #e0f7fa, #ffffff);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--info);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid #b2ebf2;
}

.table-card:hover {
    background: linear-gradient(to bottom right, #b2ebf2, #e0f7fa);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-left-width: 6px;
}

.table-card h5 {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--info);
    font-size: 1.15rem;
    font-weight: var(--font-weight-bold);
}

.table-card h5 i {
    font-size: 1.3rem;
}

.pk, .fk {
    font-size: 0.8rem;
    font-weight: var(--font-weight-bold);
    margin: var(--spacing-xs) 0;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.pk {
    background: #d4edda;
    color: #155724;
}

.fk {
    background: #f8d7da;
    color: #721c24;
}

.table-card ul {
    list-style: none;
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
}

.table-card ul li {
    padding: var(--spacing-xs) 0;
    color: var(--dark-gray);
    position: relative;
    padding-left: var(--spacing-lg);
}

.table-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--info);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ============================================
   FLOW ARROWS
   ============================================ */
.flow-arrow {
    margin: var(--spacing-xl) 0;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.arrow-line {
    width: 4px;
    height: 50px;
    background: linear-gradient(to bottom, var(--primary-green), var(--success));
    border-radius: 2px;
}

.arrow-label {
    background: var(--white);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    margin: var(--spacing-md) 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    border: 2px solid var(--primary-green);
    min-width: 250px;
}

.arrow-label i {
    font-size: 1.8rem;
    color: var(--primary-green);
}

.arrow-label span {
    font-weight: var(--font-weight-bold);
    color: var(--dark-green);
    font-size: 1.05rem;
    letter-spacing: 0.5px;
}

.arrow-label small {
    font-size: 0.85rem;
    color: var(--gray);
}

.arrow-head {
    width: 0;
    height: 0;
    border-left: 18px solid transparent;
    border-right: 18px solid transparent;
    border-top: 24px solid var(--success);
}

.arrow-head.up {
    border-top: none;
    border-bottom: 24px solid var(--success);
}

.return-arrow .arrow-line {
    background: linear-gradient(to top, var(--info), var(--light-green));
}

.return-arrow .arrow-label {
    border-color: var(--info);
}

.return-arrow .arrow-label i {
    color: var(--info);
}

.return-arrow .arrow-label span {
    color: var(--info);
}
/* ============================================
   SPLIT ARROW
   ============================================ */
.split-arrow {
    margin: var(--spacing-xxl) 0;
}

.split-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    padding: 0 var(--spacing-xl);
}

.split-left, .split-right {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.static-box {
    background: linear-gradient(to bottom right, #f1f8f4, var(--white));
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
    border: 2px solid var(--light-green);
}

.static-box h4 {
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    font-size: 1.2rem;
}

.static-box p {
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
}

.static-box ul {
    list-style: none;
    margin-top: var(--spacing-md);
}

.static-box ul li {
    padding: var(--spacing-xs) 0;
    color: var(--dark-gray);
    position: relative;
    padding-left: var(--spacing-lg);
}

.static-box ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* ============================================
   PROTOCOLS PANEL - Green Theme
   ============================================ */
.protocols-panel {
    background: var(--white);
    margin: var(--spacing-xxl) var(--spacing-xl);
    padding: var(--spacing-xxl) var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.protocols-panel h3 {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    color: var(--dark-green);
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.protocol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.protocol-card {
    background: linear-gradient(135deg, #fafafa 0%, #ffffff 100%);
    padding: var(--spacing-xxl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid var(--border);
}

.protocol-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.protocol-card[data-protocol="dns"]:hover {
    background: linear-gradient(135deg, var(--primary-green), var(--dark-green));
    color: var(--white);
    border-color: var(--dark-green);
}

.protocol-card[data-protocol="http"]:hover {
    background: linear-gradient(135deg, var(--light-green), var(--success));
    color: var(--white);
    border-color: var(--success);
}

.protocol-card[data-protocol="tcp"]:hover {
    background: linear-gradient(135deg, var(--success), #1e7e34);
    color: var(--white);
    border-color: #1e7e34;
}

.protocol-card[data-protocol="sql"]:hover {
    background: linear-gradient(135deg, var(--info), #117a8b);
    color: var(--white);
    border-color: #117a8b;
}

.protocol-card i {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
    transition: var(--transition);
}

.protocol-card:hover i {
    color: var(--white);
    transform: rotateY(360deg);
}

.protocol-card h4 {
    margin: var(--spacing-md) 0;
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
}

.protocol-card p {
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
}

.protocol-card:hover p {
    color: rgba(255, 255, 255, 0.9);
}

.protocol-card code {
    display: block;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: 'Courier New', monospace;
}

.protocol-card:hover code {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

/* ============================================
   EXAMPLE FLOW - Green Theme
   ============================================ */
.example-flow {
    background: var(--white);
    margin: var(--spacing-xxl) var(--spacing-xl);
    padding: var(--spacing-xxl) var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.example-flow h3 {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    color: var(--dark-green);
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.step {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: linear-gradient(to right, #f1f8f4, var(--white));
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-green);
    transform: scaleY(0);
    transition: var(--transition);
}

.step:hover::before {
    transform: scaleY(1);
}

.step:hover {
    background: linear-gradient(135deg, var(--primary-green), var(--dark-green));
    color: var(--white);
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
    border-color: var(--dark-green);
}

.step-number {
    background: var(--primary-green);
    color: var(--white);
    min-width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: 1.3rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.step:hover .step-number {
    background: var(--white);
    color: var(--primary-green);
    transform: rotate(360deg);
}

.step-content h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
}

.step-content p {
    font-size: 0.9rem;
    opacity: 0.85;
    line-height: 1.5;
}

/* ============================================
   SECURITY PANEL - Green Theme
   ============================================ */
.security-panel {
    background: var(--white);
    margin: var(--spacing-xxl) var(--spacing-xl);
    padding: var(--spacing-xxl) var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.security-panel h3 {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    color: var(--danger);
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.security-item {
    background: linear-gradient(to bottom, #fef5f5, var(--white));
    padding: var(--spacing-xxl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid #fee;
    transition: var(--transition);
    cursor: pointer;
}

.security-item:hover {
    border-color: var(--danger);
    background: linear-gradient(to bottom, #fff5f5, #ffe5e5);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.security-item i {
    font-size: 3rem;
    color: var(--danger);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.security-item:hover i {
    transform: scale(1.2);
}

.security-item h4 {
    margin: var(--spacing-md) 0;
    color: var(--dark-gray);
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
}

.security-item p {
    font-size: 0.95rem;
    color: var(--gray);
    line-height: 1.6;
}

/* ============================================
   SUMMARY SECTION - Green Theme
   ============================================ */
.summary-section {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 100%);
    margin: var(--spacing-xxl) var(--spacing-xl);
    padding: var(--spacing-xxl) var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.summary-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.03)"/></svg>');
    opacity: 0.5;
}

.summary-content {
    position: relative;
    z-index: 1;
}

.summary-content h3 {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    color: var(--white);
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.summary-card {
    background: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: var(--transition);
    border: 2px solid transparent;
}

.summary-card:hover {
    background: var(--white);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--white);
}

.summary-icon {
    background: linear-gradient(135deg, var(--primary-green), var(--success));
    color: var(--white);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.summary-details h4 {
    color: var(--dark-green);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-bold);
}

.summary-details p {
    color: var(--gray);
    font-size: 0.95rem;
    margin: 0;
}

.summary-note {
    background: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border-left: 5px solid var(--white);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.summary-note i {
    color: var(--primary-green);
    font-size: 1.5rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.summary-note p {
    color: var(--dark-gray);
    font-size: 1.05rem;
    line-height: 1.7;
    margin: 0;
}

.summary-note strong {
    color: var(--dark-green);
}

/* ============================================
   FOOTER - Green Theme
   ============================================ */
.footer {
    background: var(--gradient-client);
    color: var(--white);
    padding: var(--spacing-xxl);
    text-align: center;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="30" fill="rgba(255,255,255,0.03)"/></svg>');
    opacity: 0.5;
}

.footer-content {
    position: relative;
    z-index: 1;
}

.footer-content p {
    margin: var(--spacing-xs) 0;
    font-size: 1rem;
    opacity: 0.95;
}

.footer-content p strong {
    font-weight: var(--font-weight-bold);
    color: var(--white);
}

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

/* Tablets and below */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
    }
    
    .app-sections {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile devices */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-md);
    }
    
    /* Back button mobile optimization */
    .back-button {
        font-size: 1rem;
        padding: 10px 16px;
    }

    .header {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .header-content h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .header-content h1 i {
        font-size: 2.5rem;
    }

    .header-content h2 {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 0.95rem;
    }

    .architecture-diagram,
    .protocols-panel,
    .example-flow,
    .security-panel,
    .summary-section {
        padding: var(--spacing-lg);
        margin: var(--spacing-lg) var(--spacing-sm);
    }

    .component-grid,
    .config-items,
    .endpoint-grid,
    .tables-grid,
    .protocol-grid,
    .flow-steps,
    .security-grid,
    .summary-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .split-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: 0 var(--spacing-sm);
    }
    
    .layer-header {
        font-size: 1.2rem;
        padding: var(--spacing-md);
    }
    
    .layer-header i {
        font-size: 1.8rem;
    }
    
    .layer-content {
        padding: var(--spacing-md);
    }
    
    .component {
        padding: var(--spacing-lg);
    }
    
    .component i {
        font-size: 2.5rem;
    }
    
    .protocol-card,
    .security-item {
        padding: var(--spacing-lg);
    }
    
    .protocol-card i,
    .security-item i {
        font-size: 2.5rem;
    }
    
    .arrow-label {
        min-width: 200px;
        padding: var(--spacing-sm) var(--spacing-lg);
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    body {
        padding: var(--spacing-sm);
    }
    
    /* Back button - icon only on very small screens */
    .back-button span {
        display: none;
    }
    
    .back-button {
        padding: 8px 12px;
    }
    
    .back-button i {
        font-size: 1.5rem;
    }

    .header {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .header-content h1 {
        font-size: 1.5rem;
    }
    
    .header-content h1 i {
        font-size: 2rem;
    }

    .header-content h2 {
        font-size: 1.2rem;
    }
    
    .subtitle {
        font-size: 0.85rem;
    }
    
    .architecture-diagram,
    .protocols-panel,
    .example-flow,
    .security-panel,
    .summary-section {
        padding: var(--spacing-md);
        margin: var(--spacing-md) 0;
    }
    
    .protocols-panel h3,
    .example-flow h3,
    .security-panel h3,
    .summary-content h3 {
        font-size: 1.3rem;
        flex-direction: column;
    }
    
    .layer-header h3 {
        font-size: 1rem;
    }
    
    .component h4,
    .table-card h5,
    .protocol-card h4 {
        font-size: 1rem;
    }
    
    .component p,
    .table-card ul li,
    .protocol-card p {
        font-size: 0.85rem;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .summary-card {
        flex-direction: column;
        text-align: center;
    }
    
    .summary-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .footer {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .component,
    .protocol-card,
    .security-item,
    .step,
    .table-card,
    .config-item {
        cursor: default;
    }
    
    /* Increase tap target sizes */
    .component,
    .protocol-card,
    .security-item {
        min-height: 44px;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .header {
        padding: var(--spacing-md);
    }
    
    .header-content h1 {
        font-size: 1.5rem;
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.layer {
    animation: fadeIn 0.6s ease-out;
}

.layer:nth-child(1) { animation-delay: 0.1s; }
.layer:nth-child(2) { animation-delay: 0.2s; }
.layer:nth-child(3) { animation-delay: 0.3s; }
.layer:nth-child(4) { animation-delay: 0.4s; }

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    body {
        background: var(--white);
        padding: 0;
    }

    .container {
        box-shadow: none;
        border-radius: 0;
    }

    .layer:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }
    
    .component:hover,
    .protocol-card:hover,
    .step:hover,
    .security-item:hover {
        transform: none;
        background: var(--white);
        color: var(--dark-gray);
    }
    
    .protocols-panel,
    .example-flow,
    .security-panel {
        page-break-inside: avoid;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-green);
    border-radius: 10px;
    border: 2px solid var(--light-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-green);
}

/* ============================================
   SELECTION STYLING
   ============================================ */
::selection {
    background: var(--primary-green);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary-green);
    color: var(--white);
}