/* Font Face Declaration */
@font-face {
    font-family: 'Google Sans';
    src: url('../assets/fonts/GoogleSans-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

/* Stats Container */
.stats-outer-container {
    margin: 3rem auto;
    padding: 0 1rem;
    width: 100%;
    max-width: 1400px;
}

.stats-inner-container {
    background-color: #f3f3f3;
    border-radius: 20px;
    border: 1.5px solid black;
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    overflow: hidden;
}

.stats-image-container {
    flex: 0 0 16.666667%;
    padding: 0;
    display: flex;
    align-items: center;
}

.stats-image {
    width: 100%;
    height: auto;
    display: none;
    max-height: 400px;
    object-fit: contain;
}

.stats-content {
    flex: 0 0 83.333333%;
    padding: 2rem;
    width: 100%;
    box-sizing: border-box;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    width: 100%;
    box-sizing: border-box;
}

.stats-item {
    aspect-ratio: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    border-radius: 10px;
    transition: transform 0.3s ease;
    padding: 1rem;
    box-sizing: border-box;
}

.stats-item:hover {
    transform: translateY(-5px);
}

.stats-item h1 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin: 0;
    color: black;
    font-weight: bold;
    text-align: center;
}

.stats-item p {
    margin: 0.5rem 0 0;
    font-size: clamp(0.875rem, 2vw, 1.2rem);
    color: black;
    font-weight: 500;
    text-align: center;
}

@media (min-width: 768px) {
    .stats-image {
        display: block;
    }
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stats-content {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .stats-outer-container {
        padding: 0 0.75rem;
    }

    .stats-image-container {
        display: none;
    }
    
    .stats-content {
        flex: 0 0 100%;
        padding: 1rem;
    }
    
    .stats-inner-container {
        min-height: auto;
    }
}

@media (max-width: 480px) {
    .stats-outer-container {
        padding: 0 0.5rem;
        margin: 2rem auto;
    }

    .stats-content {
        padding: 0.75rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .stats-item {
        padding: 0.5rem;
    }

    .stats-item h1 {
        font-size: clamp(1.5rem, 3vw, 2.5rem);
    }

    .stats-item p {
        font-size: clamp(0.75rem, 1.5vw, 1rem);
    }
}

:root {
    /* Google Brand Colors */
    --google-blue: #4285f4;
    --google-green: #34a853;
    --google-red: #ea4335;
    --google-yellow: #fbbc04;
    --bg-dark: #1e1e1e;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;

    /* Font Family */
    --font-primary: 'Google Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    background-color: var(--bg-light);
    color: var(--bg-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
}

/* Header & Navigation */
.main-header {
    background:  rgba(255, 255, 255, 0.1);
    color: black;
    padding: var(--spacing-md) 0;
    position: relative;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    color: black;
    text-decoration: none;
    font-family: var(--font-mono);
    font-weight: 300;
    transition: opacity var(--transition-fast);
}

.nav-links a:hover {
    opacity: 0.8;
}

.hero {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md) 0;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
}

.tagline {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-mono);
    font-weight: 300;
}

.date-badge {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 500;
}

.date-badge .calendar-icon {
    transform: scale(1.2);
    margin-right: 0.8em;
}

.cta-button {
    display: inline-block;
    background-color: var(--google-yellow);
    color: var(--bg-dark);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: transform var(--transition-fast);
    border: 1px solid black;
}

.cta-button:hover {
    transform: translateY(-2px);
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

/* Sections */
.section {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.section h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--google-blue);
    font-size: 2.5rem;
}

.section-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {

    border-radius: 20px;
    border: 1.5px solid black;
    padding: var(--spacing-md);
    transition: transform 0.3s ease;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #f5f5f5;
    z-index: -1;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-item h3 {
    color: var(--google-blue);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.feature-item p {
    color: #666;
    font-size: 1rem;
    line-height: 1.5;
}

.feature-image {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    margin-bottom: 1rem;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-description {
        padding: 0 var(--spacing-sm);
        font-size: 1rem;
    }
}

/* Schedule */
.schedule {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.schedule-item {
    background-color: #f3f3f3;
    border-radius: 20px;
    border: 1.5px solid black;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform 0.3s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.schedule-item:hover {
    transform: translateY(-5px);
}

.schedule-item:active {
    transform: translateY(-2px);
}

.schedule-item time {
    font-family: var(--font-mono);
    font-weight: 300;
    color: var(--google-blue);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    pointer-events: none;
}

.schedule-item time::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='10' cy='10' r='8' stroke='%231e1e1e' stroke-width='1.5' fill='%234285f4'/%3E%3Cline x1='10' y1='10' x2='10' y2='5' stroke='white' stroke-width='1.5' stroke-linecap='round'/%3E%3Cline x1='10' y1='10' x2='14' y2='10' stroke='white' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    pointer-events: none;
}

.schedule-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.schedule-content h3 {
    color: var(--bg-dark);
    font-size: 1.3rem;
    margin: 0;
}

.schedule-content p {
    color: #666;
    font-size: 1rem;
    margin: 0;
    line-height: 1.5;
}

/* Speakers */
.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.speaker-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-fast);
}

.speaker-card:hover {
    transform: translateY(-4px);
}

.speaker-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.speaker-card h3,
.speaker-card p {
    padding: 0 var(--spacing-sm);
}

.speaker-card h3 {
    margin: var(--spacing-sm) 0 var(--spacing-xs);
}

.speaker-role {
    color: var(--google-blue);
    font-family: var(--font-mono);
    font-weight: 300;
}

.speaker-company {
    color: var(--bg-dark);
    margin-bottom: var(--spacing-sm);
}

/* Location */
.location-container {
    background-color: #f3f3f3;
    border-radius: 20px;
    border: 1.5px solid black;
    padding: 2rem;
    margin: 2rem auto;
    max-width: 1400px;
    position: relative;
    overflow: hidden;
}

.location-header {
    margin-bottom: 3rem;
    text-align: center;
}

.location-header-content {
    max-width: 800px;
    margin: 0 auto;
}

.location-header h2 {
    font-size: 2.5rem;
    color: var(--google-blue);
    margin-bottom: 1rem;
}

.location-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--bg-dark);
}

.location-header p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.6;
}

.location-image {
    position: absolute;
    top: 0;
    right: 0;
    width: 250px;
    z-index: 1;
}

.location-image img {
    width: 100%;
    object-fit: contain;
    transform: translate(20%, -20%);
}

.location-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 2rem;
    position: relative;
    z-index: 2;
}

.location-info {
    text-align: left;
}

.location-info h3 {
    color: var(--google-blue);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.transport-info {
    margin-top: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.transport-info h4 {
    color: var(--google-green);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.transport-options-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.transport-option {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    transition: transform 0.3s ease;
}

.transport-option:hover {
    transform: translateY(-5px);
}

.transport-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 1rem;
}

#bus {
    fill: var(--google-yellow);
}

#metro {
    fill: var(--google-green);
}

#car {
    fill: var(--google-red);
}

.transport-details h5 {
    color: var(--google-blue);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.transport-details ul {
    list-style: none;
    padding: 0;
}

.transport-details li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.map-container {
    border-radius: 15px;
    overflow: hidden;
    height: 100%;
    min-height: 400px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md);
    background: none;
    border: none;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: 1.1rem;
    color: var(--bg-dark);
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: rgba(66, 133, 244, 0.05);
}

.faq-icon {
    width: 24px;
    height: 24px;
    fill: var(--google-blue);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.faq-question[aria-expanded="true"] + .faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    max-height: 500px;
}

/* Responsive adjustments */
@media (min-width: 1024px) {
    .location-container {
        grid-template-columns: 1fr 1fr;
        align-items: stretch;
        gap: var(--spacing-lg);
        min-height: 450px;
    }

    .location-info {
        margin-bottom: 0;
        display: flex;
        flex-direction: column;
        height: 100%;
    }

    .transport-info {
        margin-top: var(--spacing-md);
        flex: 1;
        display: flex;
        flex-direction: column;
        height: calc(100% - var(--spacing-md));
    }

    .transport-options-container {
        flex: 1;
        overflow-y: auto;
        scrollbar-width: thin;
        scrollbar-color: var(--google-blue) transparent;
        padding-right: var(--spacing-sm);
    }

    .transport-options-container::-webkit-scrollbar {
        width: 6px;
    }

    .transport-options-container::-webkit-scrollbar-track {
        background: transparent;
    }

    .transport-options-container::-webkit-scrollbar-thumb {
        background-color: var(--google-blue);
        border-radius: 3px;
    }

    .map-container {
        margin-top: var(--spacing-md);
        height: calc(100% - var(--spacing-md));
    }
}

@media (max-width: 480px) {
    .transport-option {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .transport-icon {
        margin-bottom: var(--spacing-sm);
    }
}

/* Sponsors */
.sponsors-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.sponsor-tier {
    text-align: center;
}

.sponsor-tier h3 {
    margin-bottom: var(--spacing-md);
    color: var(--google-blue);
}

.sponsor-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Footer */
footer {
    background-color: #1e1e1e;
    color: #fff;
    padding: 4rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section {
    padding: 1rem;
}

.footer-section h4 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #4285f4;
}

.footer-section p {
    color: #fff;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: #fff;
    text-decoration: none;
}

.social-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
    transition: color 0.3s ease;
}

.social-links a:hover .social-icon {
    color: #4285f4;
}

.hashtag {
    font-family: var(--font-mono);
    font-weight: 300;
    color: var(--google-yellow);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-links {
        flex-direction: column;
        align-items: center;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.2rem;
    }

    .schedule {
        padding: 0 1rem;
    }

    .schedule-item {
        padding: 1.25rem;
    }

    .footer-content {
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 1024px) {
    .location-container {
        padding: 1.5rem;
        margin: 1.5rem;
    }

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

    .map-container {
        min-height: 300px;
    }

    .location-header {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .location-header-content {
        text-align: center;
    }

    .location-image {
        flex: 0 0 200px;
        height: 200px;
        margin: 0 auto;
    }

    .schedule {
        grid-template-columns: 1fr;
        padding: 0 1.5rem;
    }
}

@media (min-width: 1025px) {
    .location-header {
        padding-right: 200px;
        text-align: left;
    }
    
    .location-header-content {
        margin: 0;
    }
}

@media (max-width: 1024px) {
    .location-image {
        width: 200px;
    }

    .location-image img {
        transform: translate(15%, -15%);
    }
}

@media (max-width: 768px) {
    .location-container {
        margin: 1.5rem;
        padding: 1.5rem;
    }

    .location-header {
        margin-bottom: 2rem;
    }

    .location-image {
        width: 180px;
    }

    .location-image img {
        transform: translate(10%, -10%);
    }

    .location-header h2 {
        font-size: 2rem;
    }

    .location-header h3 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .location-container {
        margin: 1rem;
        padding: 1rem;
    }

    .location-image {
        width: 120px;
    }

    .location-image img {
        transform: translate(5%, -5%);
    }
}

@media (max-width: 480px) {
    .schedule {
        padding: 0 0.5rem;
        gap: 1rem;
    }

    .schedule-item {
        padding: 1rem;
    }

    .schedule-item time {
        font-size: 1.1rem;
    }

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

:focus {
    outline: 3px solid var(--google-blue);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}