/* ===================================
   SDBQL 2026 - Modern Academic Design
   Inspired by Educative Template
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Academic & Professional */
    --color-primary: #004d40;
    --color-primary-dark: #00251a;
    --color-primary-light: #39796b;
    --color-secondary: #009688;
    --color-accent: #00bfa5;
    --color-dark: #263238;
    --color-text: #455a64;
    --color-light: #eceff1;
    --color-white: #ffffff;
    --color-gray: #90a4ae;
    --color-border: #cfd8dc;
    
    /* Fonts */
    --font-primary: 'Raleway', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-dark);
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 3px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-light {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-white);
}

.btn-light:hover {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Top Bar */
.top-bar {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 10px 0;
    font-size: 13px;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left,
.top-bar-right {
    display: flex;
    gap: 20px;
}

.top-bar a {
    color: var(--color-white);
    opacity: 0.9;
}

.top-bar a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.top-bar .icon {
    margin-right: 5px;
}

/* Navigation */
.navbar {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-primary);
}

.logo-icon {
    font-size: 32px;
}

.logo-title {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary);
    display: block;
    line-height: 1;
}

.logo-subtitle {
    font-size: 14px;
    color: var(--color-secondary);
    display: block;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 5px;
}

.nav-link {
    padding: 10px 18px;
    color: var(--color-dark);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 3px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-light);
}

.nav-btn {
    padding: 10px 24px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 3px;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero Slider */
.hero-slider {
    position: relative;
    min-height: 550px;
    display: flex;
    align-items: center;
    margin-top: -10px;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 1s ease;
    background-size: cover;
    background-position: center;
}

.slide.active {
    opacity: 1;
    position: relative;
}

.slide-content {
    position: sticky;
    top: 230px;
    z-index: 50;
    max-width: 700px;
    padding: 60px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 500px;
    padding-left: 20px;
}

.slide-label {
    display: inline-block;
    background: rgba(255,255,255,0.05);
    color: var(--color-white);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 25px;
    backdrop-filter: blur(3px);
}

.slide-title-main {
    font-size: 3.8rem;
    color: var(--color-white);
    margin-bottom: 30px;
    line-height: 1.1;
    font-weight: 800;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.slide-subtitle {
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: 20px;
    opacity: 0.95;
    font-weight: 600;
}

.slide-title {
    font-size: 3.5rem;
    color: var(--color-white);
    margin-bottom: 25px;
    line-height: 1.2;
    font-weight: 800;
}

.slide-desc {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-bottom: 30px;
    opacity: 0.9;
    font-weight: 500;
}

.slide-meta {
    display: flex;
    gap: 30px;
    margin-bottom: 35px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
    font-weight: 600;
}

.meta-item .icon {
    font-size: 20px;
}

.slide-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Welcome Section */
.welcome-section {
    padding: 100px 0;
    background: var(--color-white);
}

.welcome-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.section-label {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: 25px;
    line-height: 1.3;
}

.welcome-content p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
}

.welcome-stats {
    display: flex;
    gap: 30px;
    margin: 35px 0;
}

.stat-box {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    font-family: var(--font-primary);
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--color-text);
    margin-top: 5px;
}

.welcome-image {
    position: relative;
}

.image-placeholder img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: var(--shadow-lg);
}

.image-badge {
    position: absolute;
    bottom: 30px;
    left: 30px;
    background: var(--color-white);
    padding: 20px 25px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--shadow-lg);
}

.badge-icon {
    font-size: 32px;
}

.image-badge strong {
    display: block;
    color: var(--color-dark);
    font-size: 16px;
    margin-bottom: 3px;
}

.image-badge span {
    display: block;
    color: var(--color-text);
    font-size: 13px;
}

/* Committee Section */
.committee-section {
    padding: 80px 0;
    background: var(--color-light);
}

.section-header-center {
    text-align: center;
    margin-bottom: 60px;
}

.section-desc {
    color: var(--color-text);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

.committee-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.committee-box {
    background: var(--color-white);
    padding: 40px;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
}

.committee-box h3 {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--color-border);
}

.member-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.member-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.member-item strong {
    color: var(--color-dark);
    font-size: 16px;
}

.member-item span {
    color: var(--color-text);
    font-size: 14px;
}

.member-item.featured strong {
    color: var(--color-primary);
    font-size: 18px;
}

/* Themes Section */
.themes-section {
    padding: 100px 0;
    background: var(--color-white);
}

.themes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.theme-box {
    background: var(--color-white);
    padding: 40px 30px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

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

.theme-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-light);
    font-family: var(--font-primary);
}

.theme-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.theme-box h3 {
    font-size: 1.25rem;
    color: var(--color-dark);
    margin-bottom: 15px;
}

.theme-box p {
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.7;
}

/* History Section */
.history-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(0,77,64,0.5) 0%, rgba(0,121,107,0.5) 100%), url('images/6.jpg') center/cover;
    color: var(--color-white);
}

.history-section .section-label,
.history-section .section-title {
    color: var(--color-white);
}

.history-intro {
    text-align: center;
    font-size: 1.125rem;
    max-width: 800px;
    margin: 0 auto 50px;
    color: var(--color-white);
    opacity: 0.95;
}

.history-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.history-stat-box {
    background: rgba(255,255,255,0.06);
    padding: 35px 25px;
    border-radius: 5px;
    text-align: center;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.12);
}

.stat-icon-circle {
    width: 70px;
    height: 70px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 20px;
}

.history-stat-box h3 {
    font-size: 2.5rem;
    color: var(--color-white);
    margin-bottom: 10px;
    font-weight: 800;
}

.history-stat-box p {
    font-size: 16px;
    color: var(--color-white);
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-detail {
    font-size: 13px;
    opacity: 0.8;
    display: block;
}

.history-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.highlight-box {
    background: rgba(255,255,255,0.06);
    padding: 30px 20px;
    border-radius: 5px;
    text-align: center;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.12);
}

.highlight-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 15px;
}

.highlight-box h4 {
    color: var(--color-white);
    font-size: 16px;
    margin-bottom: 10px;
}

.highlight-box p {
    font-size: 13px;
    opacity: 0.9;
    line-height: 1.6;
}

/* Dates Section */
.dates-section {
    padding: 100px 0;
    background: var(--color-light);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--color-white);
    border: 4px solid var(--color-primary);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-item.featured .timeline-marker {
    width: 30px;
    height: 30px;
    border-width: 5px;
    background: var(--color-primary);
}

.timeline-content {
    background: var(--color-white);
    padding: 25px 30px;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
    width: calc(100% - 40px);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 40px;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 40px;
}

.timeline-date {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.timeline-item.featured .timeline-date {
    background: var(--color-accent);
}

.timeline-content h4 {
    color: var(--color-dark);
    margin-bottom: 8px;
    font-size: 1.125rem;
}

.timeline-content p {
    color: var(--color-text);
    font-size: 14px;
    margin: 0;
}

/* Sponsoring Section */
.sponsoring-section {
    padding: 100px 0;
    background: var(--color-white);
}

.pricing-boxes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.pricing-box {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: 5px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

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

.pricing-box.featured {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, #004d40 0%, #00796b 100%);
    color: var(--color-white);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-white);
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.pricing-box h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.pricing-box.featured h3 {
    color: var(--color-white);
}

.pricing-price {
    margin: 30px 0;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    font-family: var(--font-primary);
    display: block;
}

.pricing-box.featured .price-amount {
    color: var(--color-white);
}

.price-currency {
    font-size: 1.25rem;
    font-weight: 600;
    margin-left: 5px;
}

.pricing-features {
    list-style: none;
    margin: 30px 0;
    text-align: left;
}

.pricing-features li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    font-size: 14px;
}

.pricing-box.featured .pricing-features li {
    border-bottom-color: rgba(255,255,255,0.2);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.partners-box {
    background: var(--color-light);
    padding: 50px;
    border-radius: 5px;
    text-align: center;
}

.partners-box h3 {
    color: var(--color-primary);
    margin-bottom: 30px;
}

.partners-list {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.partner-item {
    background: var(--color-white);
    padding: 30px 40px;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
    min-width: 200px;
}

.partner-item strong {
    display: block;
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.partner-item span {
    display: block;
    font-size: 14px;
    color: var(--color-text);
}

.partner-item.placeholder {
    border: 2px dashed var(--color-border);
    background: transparent;
}

/* Venue Section */
.venue-section {
    padding: 100px 0;
    background: var(--color-white);
}

.venue-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.venue-info h2 {
    font-size: 2rem;
    margin-bottom: 30px;
}

.venue-info h3 {
    color: var(--color-primary);
    margin-top: 25px;
    margin-bottom: 10px;
}

.venue-address {
    background: var(--color-light);
    padding: 15px 20px;
    border-left: 4px solid var(--color-primary);
    margin: 20px 0;
}

.venue-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin: 30px 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: var(--color-light);
    border-radius: 5px;
}

.feature-icon {
    font-size: 1.75rem;
}

.venue-images {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.venue-image-main img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: var(--shadow-md);
}

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

.venue-image-small img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background: var(--color-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
}

.contact-info-box {
    background: var(--color-white);
    padding: 40px;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
}

.contact-info-box h3 {
    color: var(--color-primary);
    margin-bottom: 25px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.contact-item strong {
    display: block;
    color: var(--color-dark);
    margin-bottom: 5px;
    font-size: 14px;
}

.contact-item a {
    color: var(--color-text);
    font-size: 14px;
}

.contact-item a:hover {
    color: var(--color-primary);
}

.direction-info {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
}

.direction-info h4 {
    color: var(--color-primary);
    margin-bottom: 15px;
}

.direction-info p {
    font-size: 14px;
    margin-bottom: 10px;
}

.contact-form-box {
    background: var(--color-white);
    padding: 40px;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
}

.contact-form-box h3 {
    color: var(--color-primary);
    margin-bottom: 25px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--color-border);
    border-radius: 3px;
    font-family: var(--font-secondary);
    font-size: 14px;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-logo h4 {
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.footer-logo p {
    font-size: 13px;
    opacity: 0.8;
}

.footer-col h4 {
    color: var(--color-white);
    font-size: 1.125rem;
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
}

.footer-col ul li a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

.footer-col p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 15px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 3px;
    font-size: 14px;
}

.newsletter-form button {
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    padding: 10px 20px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 18px;
}

.newsletter-form button:hover {
    background: var(--color-accent);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
}

.social-links a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    font-size: 14px;
    opacity: 0.7;
    margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .welcome-grid,
    .venue-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .themes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .history-stats-grid,
    .history-highlights {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-boxes {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .top-bar-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .nav-menu {
        position: fixed;
        top: 73px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 73px);
        background: var(--color-white);
        flex-direction: column;
        padding: 30px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-btn {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .slide-title-main {
        font-size: 2.8rem;
    }

    .slide-subtitle {
        font-size: 1.1rem;
    }

    .slide-title {
        font-size: 2.5rem;
    }
    
    .slide-desc {
        font-size: 1rem;
    }
    
    .slide-meta {
        flex-direction: column;
        gap: 15px;
    }
    
    .welcome-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .committee-grid,
    .themes-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
    }
    
    .timeline-marker {
        left: 20px;
    }
    
    .timeline-content {
        width: 100%;
        margin: 0 !important;
    }
    
    .history-stats-grid,
    .history-highlights {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    .container {
        padding: 0 15px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 13px;
    }
    
    .slide-title-main {
        font-size: 2rem;
    }

    .slide-subtitle {
        font-size: 0.95rem;
    }

    .slide-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .venue-features {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease forwards;
}