:root {
    --primary: #0056b3;
    --primary-dark: #003d80;
    --accent: #00ADEF;
    --secondary: #ffffff;
    --bg-light: #f8fbff;
    --text-dark: #0a192f;
    --text-muted: #5e6d82;
    --glass: rgba(255, 255, 255, 0.85);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --container-max: 1200px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Outfit', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    background: #ffffff;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 86, 179, 0.08);
    box-shadow: 0 2px 12px rgba(0, 30, 60, 0.06);
}

.container-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    min-height: 72px;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

.header-logos {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-shrink: 0;
}

.header-logo {
    height: 44px;
    width: auto;
    max-width: 120px;
    object-fit: contain;
    display: block;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.site-nav ul {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.site-nav a {
    font-weight: 500;
    font-size: 0.92rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.site-nav a:hover {
    color: var(--primary);
}

.header-register {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #ffffff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.65rem 1.6rem;
    border-radius: 999px;
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(0, 86, 179, 0.22);
    transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.header-register:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(0, 86, 179, 0.28);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid rgba(0, 86, 179, 0.15);
    border-radius: 10px;
    background: #ffffff;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin: 0 auto;
    background: var(--primary);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-header.menu-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header.menu-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

.site-header.menu-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero Section */
.hero {
    height: 90vh;
    min-height: 700px;
    background: linear-gradient(135deg, #001a3d 0%, #0056b3 100%);
    position: relative;
    display: flex;
    align-items: center;
    color: white;
    padding-top: 88px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 20% 30%, rgba(0, 173, 239, 0.2) 0%, transparent 50%),
                      url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-label {
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 1.5rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.hero-label::after {
    content: '';
    height: 1px;
    width: 60px;
    background: var(--accent);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 2.5rem;
}

.hero h1 .highlight {
    display: block;
    font-weight: 300;
    opacity: 0.95;
    font-size: 0.7em;
    margin-top: 0.5rem;
    color: var(--accent);
}

.hero-details {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
    font-weight: 400;
}

.detail-item small {
    display: block;
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 0.2rem;
}

.detail-item svg {
    color: var(--accent);
    flex-shrink: 0;
}

.cta-group {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 173, 239, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    background-color: #0099d3;
}

.btn-outline {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

/* Sections Common */
section {
    padding: 6rem 0;
    opacity: 1;
    visibility: visible;
}

.section-header {
    margin-bottom: 3.5rem;
}

.section-header.centered {
    text-align: center;
}

.badge {
    background-color: rgba(0, 86, 179, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    display: inline-block;
}

.badge-light {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.check-list li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 900;
}

.about-image {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    height: 400px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.stats-card {
    background: var(--glass);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
}

.stats-card h3 {
    font-size: 3rem;
    color: var(--primary);
}

/* Speaker Section */
.speaker {
    background-color: #fff;
}

.speaker-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: var(--shadow);
}

.speaker-info {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.speaker-avatar {
    flex-shrink: 0;
}

.speaker-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent);
    box-shadow: var(--shadow);
}

.speaker-details h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.speaker-details .title {
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.speaker-details .bio {
    color: var(--text-muted);
}

/* Location Section */
.location-card {
    background: var(--primary);
    color: white;
    border-radius: 32px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
}

.location-content {
    padding: 4rem;
}

.location-content h2 {
    font-size: 2.5rem;
    color: white;
    margin: 1rem 0;
}

.location-content p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.location-meta {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.location-map-stub {
    background-color: #e3efff;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: 700;
}

/* Register Section */
.register {
    background-color: #fff;
}

.register-card {
    max-width: 720px;
    margin: 0 auto;
    background: var(--bg-light);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.register-card > p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.register-details {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(0, 86, 179, 0.1);
    border-bottom: 1px solid rgba(0, 86, 179, 0.1);
}

.register-detail {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.register-detail strong {
    color: var(--primary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.register-detail span {
    font-weight: 600;
}

.register-note {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    opacity: 0.6;
    font-size: 0.9rem;
}

.footer-logos {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.footer-logo-wrapper {
    background: white;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    transition: var(--transition);
}

.footer-logo-wrapper:hover {
    transform: translateY(-5px);
}

.footer-logo {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

/* Remove the filter-white since we use white containers now */
.footer-logo.filter-white {
    filter: none;
}

.footer-bottom {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 1024px) {
    .about-grid, .location-card {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        height: 300px;
    }
    
    .location-map-stub {
        height: 300px;
    }
}

@media (max-width: 900px) {
    .header-logo {
        height: 36px;
        max-width: 90px;
    }

    .header-logos {
        gap: 0.75rem;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid rgba(0, 86, 179, 0.08);
        box-shadow: 0 12px 24px rgba(0, 30, 60, 0.08);
        padding: 1rem 2rem 1.25rem;
        z-index: 10;
    }

    .site-header.menu-open .site-nav {
        display: block;
    }

    .site-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .site-nav a {
        display: block;
        padding: 0.65rem 0;
        font-size: 1rem;
    }

    .header-right {
        gap: 0.75rem;
    }

    .header-register {
        padding: 0.55rem 1.15rem;
        font-size: 0.88rem;
    }

    .nav-toggle {
        display: flex;
    }

    .container-header {
        position: relative;
        min-height: 64px;
    }
}

@media (max-width: 768px) {
    .header-logo {
        height: 32px;
        max-width: 72px;
    }

    .header-logos {
        gap: 0.5rem;
    }
    
    .hero {
        text-align: center;
        height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-details {
        justify-content: center;
        gap: 1.5rem;
    }
    
    .cta-group {
        justify-content: center;
    }
    
    .speaker-info {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .footer-top {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
}

/* Limit size for very large screens */
@media (min-width: 2000px) {
    body {
        max-width: 1920px;
        margin: 0 auto;
        box-shadow: 0 0 100px rgba(0,0,0,0.1);
    }
    header,
    .site-header {
        max-width: 1920px;
        left: 50%;
        transform: translateX(-50%);
    }
}