/* Base Styles */
:root {
    --meshtastic-color: #1e88e5;
    --meshtastic-alt-color: #0d47a1;
    --meshcore-color: #43a047;
    --meshcore-alt-color: #1b5e20;
    --background-color: #f5f5f5;
    --text-color: #333;
    --card-bg-color: #fff;
    --header-bg-color: #2c3e50;
    --footer-bg-color: #2c3e50;
    --nav-bg-color: #34495e;
    --accent-color: #e74c3c;
    --border-radius: 8px;
    --section-spacing: 2.5rem;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

a {
    color: var(--meshtastic-color);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--meshtastic-alt-color);
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.button {
    display: inline-block;
    background-color: var(--meshtastic-color);
    color: white;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: background-color var(--transition-speed);
}

.button:hover {
    background-color: var(--meshtastic-alt-color);
    text-decoration: none;
    color: white;
}

/* Header & Footer */
header {
    background-color: var(--header-bg-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.8;
}

footer {
    background-color: var(--footer-bg-color);
    color: white;
    padding: 1.5rem 0;
    text-align: center;
    margin-top: 3rem;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: white;
    margin: 0 10px;
    opacity: 0.8;
    transition: opacity var(--transition-speed);
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: none;
}

/* Navigation */
nav {
    background-color: var(--nav-bg-color);
    padding: 0.8rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav li {
    margin: 0 1rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-speed);
}

nav a:hover, nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

nav a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Main Content */
main {
    padding: 2rem 0;
}

section {
    margin-bottom: var(--section-spacing);
}

h2 {
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
    color: var(--header-bg-color);
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background-color: var(--accent-color);
}

h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

h4 {
    margin: 1rem 0 0.5rem;
    color: var(--text-color);
}

p, ul, ol {
    margin-bottom: 1rem;
}

ul, ol {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Card Layout */
.card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: space-between;
}

.card {
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    flex: 1 1 calc(50% - 0.75rem);
    min-width: 300px;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.wide-card {
    flex: 1 1 100%;
}

.card-header {
    padding: 1rem;
    color: white;
    font-weight: bold;
}

.meshtastic {
    background-color: var(--meshtastic-color);
}

.meshtastic-alt {
    background-color: var(--meshtastic-alt-color);
}

.meshcore {
    background-color: var(--meshcore-color);
}

.meshcore-alt {
    background-color: var(--meshcore-alt-color);
}

.card-body {
    padding: 1.5rem;
}

.card-links {
    margin-top: 1rem;
    text-align: center;
}

/* Table Styles */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    background-color: var(--card-bg-color);
    box-shadow: var(--card-shadow);
    border-radius: var(--border-radius);
    overflow: hidden;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: var(--header-bg-color);
    color: white;
}

tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.02);
}

tr:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* Accordion */
.accordion {
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

.accordion-item {
    border: 1px solid #e0e0e0;
    margin-bottom: 10px;
    border-radius: 5px;
    overflow: hidden;
}

.accordion-header {
    background-color: #f5f5f5;
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.accordion-icon {
    font-size: 20px;
    transition: transform 0.3s;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 20px;
}

.accordion-item.active .accordion-content {
    max-height: 1000px;
    padding: 20px;
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

/* Comparison Container */
.comparison-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.comparison-item {
    flex: 1 1 calc(50% - 0.75rem);
    min-width: 280px;
}

.comparison-item h4 {
    margin-top: 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

/* Two Column Layout */
.two-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 1.5rem;
}

.column {
    flex: 1 1 calc(50% - 1rem);
    min-width: 280px;
}

.meshtastic-header {
    color: var(--meshtastic-color);
    border-bottom: 2px solid var(--meshtastic-color);
    padding-bottom: 0.5rem;
}

.meshcore-header {
    color: var(--meshcore-color);
    border-bottom: 2px solid var(--meshcore-color);
    padding-bottom: 0.5rem;
}

.technical-section {
    background-color: var(--card-bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    margin-top: 1rem;
}

/* Call to Action Message */
.cta-message {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.cta-box {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
    text-align: center;
    box-shadow: var(--card-shadow);
    border-left: 5px solid var(--accent-color);
    animation: pulse-border 2s infinite;
}

.cta-box h3 {
    margin-bottom: 1rem;
    color: var(--header-bg-color);
}

.highlight-button {
    background-color: var(--accent-color);
    font-size: 1.1rem;
    padding: 12px 24px;
    transition: all 0.3s;
}

.highlight-button:hover {
    background-color: #c0392b;
    transform: scale(1.05);
}

@keyframes pulse-border {
    0% { border-left-color: var(--accent-color); }
    50% { border-left-color: var(--meshtastic-color); }
    100% { border-left-color: var(--accent-color); }
}

/* Info Box */
.info-box {
    display: flex;
    align-items: center;
    background-color: rgba(30, 136, 229, 0.1);
    border-left: 4px solid var(--meshtastic-color);
    padding: 1rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    margin-bottom: 2rem;
}

.info-icon {
    font-size: 1.5rem;
    color: var(--meshtastic-color);
    margin-right: 1rem;
}

.info-content p {
    margin: 0;
}

/* Context Paragraph */
.context {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Version Comparison Styles */

.version-box {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    margin: 30px 0;
}

.version-badge {
    position: relative;
    padding: 30px 40px;
    border-radius: 8px;
    text-align: center;
    min-width: 180px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.version-badge h3 {
    margin: 0;
    font-size: 1.5rem;
}

.version-badge.meshtastic {
    background-color: rgba(0, 123, 255, 0.1);
    border: 2px solid #007bff;
}

.version-badge.meshcore {
    background-color: rgba(255, 107, 0, 0.1);
    border: 2px solid #ff6b00;
}

.version-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #fff;
    padding: 2px 12px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.version-badge.meshtastic .version-tag {
    color: #007bff;
    border: 2px solid #007bff;
}

.version-badge.meshcore .version-tag {
    color: #ff6b00;
    border: 2px solid #ff6b00;
}

h3.vs {
    font-size: 1.8rem;
    color: #555;
    margin: 0;
}

.version-description {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 20px;
    background-color: rgba(0,0,0,0.02);
    border-radius: 8px;
    margin-top: 20px;
}

/* Routing Diagram Animation Styles */
.routing-diagram {
    margin-top: 2rem;
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.routing-diagram h4 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--header-bg-color);
}

.diagram-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
}

.diagram {
    flex: 1 1 calc(50% - 1rem);
    min-width: 280px;
    max-width: 500px;
    text-align: center;
    padding: 1rem;
    border-radius: var(--border-radius);
}

.meshtastic-diagram {
    background-color: rgba(30, 136, 229, 0.05);
    border: 2px solid var(--meshtastic-color);
}

.meshcore-diagram {
    background-color: rgba(67, 160, 71, 0.05);
    border: 2px solid var(--meshcore-color);
}

.animation-container {
    position: relative;
    height: 200px;
    margin: 1.5rem 0;
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.node {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.source-node {
    background-color: #4caf50;
    color: white;
    left: 20px;
    top: 80px;
}

.destination-node {
    background-color: #e91e63;
    color: white;
    right: 20px;
    top: 80px;
}

.node:nth-child(2) {
    left: 90px;
    top: 40px;
}

.node:nth-child(3) {
    left: 160px;
    top: 120px;
}

.node:nth-child(4) {
    right: 90px;
    top: 40px;
}

.connection {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image: repeating-linear-gradient(0deg, transparent, transparent 19px, #ccc 20px);
    opacity: 0.3;
    z-index: 0;
}

.message-particle {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    z-index: 1;
}

.meshtastic-particle {
    background-color: var(--meshtastic-color);
    box-shadow: 0 0 10px var(--meshtastic-color);
    animation: meshtastic-routing 5s infinite;
}

.meshtastic-particle-2 {
    background-color: var(--meshtastic-color);
    box-shadow: 0 0 10px var(--meshtastic-color);
    animation: meshtastic-routing-2 5s infinite;
    animation-delay: 0.7s;
}

.meshtastic-particle-3 {
    background-color: var(--meshtastic-color);
    box-shadow: 0 0 10px var(--meshtastic-color);
    animation: meshtastic-routing-3 5s infinite;
    animation-delay: 1.4s;
}

.meshcore-particle {
    background-color: var(--meshcore-color);
    box-shadow: 0 0 10px var(--meshcore-color);
    animation: meshcore-routing 5s infinite;
}

/* MeshCore phased routing animations */
.meshcore-flood-1 {
    background-color: var(--meshcore-color);
    box-shadow: 0 0 10px var(--meshcore-color);
    animation: meshcore-flood-1 15s forwards;
    opacity: 0;
}

.meshcore-flood-2 {
    background-color: var(--meshcore-color);
    box-shadow: 0 0 10px var(--meshcore-color);
    animation: meshcore-flood-2 15s forwards;
    opacity: 0;
}

.meshcore-flood-3 {
    background-color: var(--meshcore-color);
    box-shadow: 0 0 10px var(--meshcore-color);
    animation: meshcore-flood-3 15s forwards;
    opacity: 0;
}

.meshcore-direct-packet {
    background-color: var(--meshcore-color);
    box-shadow: 0 0 10px var(--meshcore-color);
    animation: meshcore-direct 15s infinite;
    opacity: 0;
}

.meshcore-dropped-1 {
    background-color: rgba(255, 0, 0, 0.7);
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.7);
    animation: meshcore-dropped-1 15s forwards;
    opacity: 0;
}

.meshcore-dropped-2 {
    background-color: rgba(255, 0, 0, 0.7);
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.7);
    animation: meshcore-dropped-2 15s forwards;
    opacity: 0;
}

.route-link {
    position: absolute;
    height: 4px;
    background-color: var(--meshcore-color);
    transform-origin: left center;
    opacity: 0;
    z-index: 0;
}

.a-to-c {
    left: 40px;
    top: 100px;
    width: 150px;
    transform: rotate(25deg);
    animation: link-appear 15s forwards;
}

.c-to-e {
    left: 180px;
    top: 140px;
    width: 180px;
    transform: rotate(-25deg);
    animation: link-appear 15s forwards;
}

.phase-indicator {
    margin-top: 15px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    padding: 10px;
    border: 1px solid #ddd;
}

.phase-text {
    padding: 5px 10px;
    margin: 2px 0;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.4;
    transition: opacity 0.3s;
}

.phase-text.active {
    background-color: rgba(67, 160, 71, 0.1);
    border-left: 3px solid var(--meshcore-color);
    opacity: 1;
}

/* Phase 1: Initial flooding animations */
@keyframes meshcore-flood-1 {
    /* Hidden until phase 1 starts */
    0% { opacity: 0; }
    /* Start at node A */
    5% { left: 40px; top: 100px; opacity: 1; }
    /* Go to node B */
    10% { left: 110px; top: 60px; }
    11% { left: 110px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    12% { left: 110px; top: 60px; transform: scale(1); }
    /* End phase 1 */
    25% { opacity: 0; }
    100% { opacity: 0; }
}

@keyframes meshcore-flood-2 {
    /* Hidden until phase 1 starts */
    0% { opacity: 0; }
    /* Start at node A */
    5% { left: 40px; top: 100px; opacity: 1; }
    /* Go to node C - this will be the successful path */
    13% { left: 180px; top: 140px; }
    14% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    15% { left: 180px; top: 140px; transform: scale(1); }
    /* Go to node E */
    20% { left: 340px; top: 100px; }
    21% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    22% { left: 340px; top: 100px; transform: scale(1); }
    /* End phase 1 */
    25% { opacity: 0; }
    100% { opacity: 0; }
}

@keyframes meshcore-flood-3 {
    /* Hidden until phase 1 starts */
    0% { opacity: 0; }
    /* Start at node A */
    5% { left: 40px; top: 100px; opacity: 1; }
    /* Go to node C */
    13% { left: 180px; top: 140px; }
    14% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    15% { left: 180px; top: 140px; transform: scale(1); }
    /* Go to node D */
    18% { left: 270px; top: 60px; }
    19% { left: 270px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    20% { left: 270px; top: 60px; transform: scale(1); }
    /* End phase 1 */
    25% { opacity: 0; }
    100% { opacity: 0; }
}

/* Phase 2: Link establishment animation */
@keyframes link-appear {
    /* Hidden until phase 2 starts */
    0% { opacity: 0; }
    24.9% { opacity: 0; }
    /* Phase 2: Grow link from 0 to 100% width */
    25% { opacity: 0; transform: scaleX(0); }
    30% { opacity: 0.7; transform: scaleX(1); }
    /* Keep link visible for the rest of the animation */
    100% { opacity: 0.7; transform: scaleX(1); }
}

/* Phase 3: Direct routing animation */
@keyframes meshcore-direct {
    /* Hidden until phase 3 starts */
    0% { opacity: 0; }
    39.9% { opacity: 0; }
    /* Phase 3: Direct routing along established path */
    40% { left: 40px; top: 100px; opacity: 1; transform: scale(1); }
    /* Go directly to node C */
    50% { left: 180px; top: 140px; }
    51% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    52% { left: 180px; top: 140px; transform: scale(1); }
    /* Go directly to node E */
    60% { left: 340px; top: 100px; }
    61% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    62% { left: 340px; top: 100px; transform: scale(1); opacity: 1; }
    /* Fade out */
    65% { opacity: 0; }
    /* Loop the direct routing after a pause */
    75% { left: 40px; top: 100px; opacity: 1; transform: scale(1); }
    85% { left: 180px; top: 140px; }
    86% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    87% { left: 180px; top: 140px; transform: scale(1); }
    95% { left: 340px; top: 100px; }
    96% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    97% { left: 340px; top: 100px; transform: scale(1); opacity: 1; }
    100% { opacity: 0; }
}

/* Packet dropping animations */
@keyframes meshcore-dropped-1 {
    /* Hidden until phase 3 starts */
    0% { opacity: 0; }
    39.9% { opacity: 0; }
    /* Phase 3: Start at node A and go toward B */
    40% { left: 40px; top: 100px; opacity: 0; }
    45% { left: 70px; top: 80px; opacity: 1; }
    /* Show dropped at B */
    50% { left: 110px; top: 60px; }
    51% { left: 110px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    52% { left: 110px; top: 60px; transform: scale(1); }
    53% { left: 110px; top: 60px; transform: scale(0); opacity: 0; }
    /* Loop for second attempt */
    75% { left: 40px; top: 100px; opacity: 0; }
    80% { left: 70px; top: 80px; opacity: 1; }
    85% { left: 110px; top: 60px; }
    86% { left: 110px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    87% { left: 110px; top: 60px; transform: scale(1); }
    88% { left: 110px; top: 60px; transform: scale(0); opacity: 0; }
    100% { opacity: 0; }
}

@keyframes meshcore-dropped-2 {
    /* Hidden until phase 3 starts */
    0% { opacity: 0; }
    39.9% { opacity: 0; }
    /* Phase 3: Send toward D */
    40% { left: 180px; top: 140px; opacity: 0; }
    45% { left: 225px; top: 100px; opacity: 1; }
    /* Show dropped at D */
    50% { left: 270px; top: 60px; }
    51% { left: 270px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    52% { left: 270px; top: 60px; transform: scale(1); }
    53% { left: 270px; top: 60px; transform: scale(0); opacity: 0; }
    /* Loop for second attempt */
    75% { left: 180px; top: 140px; opacity: 0; }
    80% { left: 225px; top: 100px; opacity: 1; }
    85% { left: 270px; top: 60px; }
    86% { left: 270px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    87% { left: 270px; top: 60px; transform: scale(1); }
    88% { left: 270px; top: 60px; transform: scale(0); opacity: 0; }
    100% { opacity: 0; }
}

@keyframes meshcore-routing {
    0% { left: 40px; top: 100px; opacity: 0; transform: scale(1); }
    5% { opacity: 1; }
    
    /* Direct path through C */
    40% { left: 180px; top: 140px; }
    45% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    50% { left: 180px; top: 140px; transform: scale(1); }
    
    /* From C to E */
    90% { left: 340px; top: 100px; }
    92% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    95% { left: 340px; top: 100px; transform: scale(1); opacity: 1; }
    
    100% { opacity: 0; }
}

/* Meshtastic animations */
@keyframes meshtastic-routing {
    0% { left: 40px; top: 100px; opacity: 0; transform: scale(1); }
    5% { opacity: 1; }
    
    /* Path: A → B → D → E */
    15% { left: 110px; top: 60px; }
    17% { left: 110px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    19% { left: 110px; top: 60px; transform: scale(1); }
    
    35% { left: 270px; top: 60px; } 
    37% { left: 270px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    39% { left: 270px; top: 60px; transform: scale(1); }
    
    65% { left: 340px; top: 100px; }
    67% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    69% { left: 340px; top: 100px; transform: scale(1); }
    
    95% { opacity: 1; }
    100% { opacity: 0; }
}

@keyframes meshtastic-routing-2 {
    0% { left: 40px; top: 100px; opacity: 0; transform: scale(1); }
    5% { opacity: 1; }
    
    /* Path: A → C → E */
    25% { left: 180px; top: 140px; }
    27% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    29% { left: 180px; top: 140px; transform: scale(1); }
    
    75% { left: 340px; top: 100px; }
    77% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    79% { left: 340px; top: 100px; transform: scale(1); }
    
    95% { opacity: 1; }
    100% { opacity: 0; }
}

@keyframes meshtastic-routing-3 {
    0% { left: 40px; top: 100px; opacity: 0; transform: scale(1); }
    5% { opacity: 1; }
    
    /* Path: A → C → D → E */
    20% { left: 180px; top: 140px; }
    22% { left: 180px; top: 140px; transform: scale(1.5); opacity: 0.8; }
    24% { left: 180px; top: 140px; transform: scale(1); }
    
    45% { left: 270px; top: 60px; }
    47% { left: 270px; top: 60px; transform: scale(1.5); opacity: 0.8; }
    49% { left: 270px; top: 60px; transform: scale(1); }
    
    75% { left: 340px; top: 100px; }
    77% { left: 340px; top: 100px; transform: scale(1.5); opacity: 0.8; }
    79% { left: 340px; top: 100px; transform: scale(1); }
    
    95% { opacity: 1; }
    100% { opacity: 0; }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    nav ul {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
    
    nav li {
        margin: 0 0.5rem;
    }
    
    .card-container, .comparison-container {
        flex-direction: column;
    }
    
    .card, .comparison-item {
        min-width: 100%;
    }
    
    .version-box {
        flex-direction: column;
        gap: 50px;
    }
    
    h3.vs {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    header {
        padding: 1.5rem 0;
    }
    
    nav {
        padding: 0.5rem 0;
    }
    
    section {
        margin-bottom: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .technical-section {
        padding: 1rem;
    }
}