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

body {
    font-family: 'Montserrat', BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
}

/* Header Styles */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: none;
    width: 100%;
    margin: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 2rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 60px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
}

.nav-menu a.active-page {
    color: #005A9C;
    font-weight: 600;
}

.nav-register-btn {
    background: #ffffff !important;
    color: #005A9C !important;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 90, 156, 0.3);
    border: 2px solid #005A9C;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
}

/* Sponsors Section */
.sponsors {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    margin-top: 70px;
}

.sponsors h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #005A9C;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Sponsor Tiers */
.sponsor-tier {
    margin-bottom: 4rem;
}

.sponsor-tier h3 {
    text-align: center;
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 2rem;
    font-weight: 600;
    position: relative;
}

.sponsor-tier h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #005A9C 0%, #00365e 50%, #005A9C 100%);
    border-radius: 2px;
}

/* Sponsors Grid */
.sponsors-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

.title-sponsors {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    max-width: 1000px;
    margin: 0 auto;
}

.supporting-sponsors {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    max-width: 1200px;
    margin: 0 auto;
}

/* Sponsor Cards */
.sponsor-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border: 1px solid #e9ecef;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

/* Clickable Sponsor Cards */
.clickable-sponsor {
    cursor: pointer;
    transition: all 0.3s ease;
}

.clickable-sponsor:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 90, 156, 0.15);
    border-color: #005A9C;
}

.clickable-sponsor:active {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 90, 156, 0.2);
}

.title-sponsor {
    border: 2px solid #005A9C;
}

.title-sponsor::before {
    height: 4px;
}

/* Sponsor Logo */
.sponsor-logo {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 120px;
}

.sponsor-logo img {
    max-width: 200px;
    max-height: 120px;
    object-fit: contain;
}

.placeholder-logo {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #005A9C 0%, #0077cc 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.placeholder-logo i {
    font-size: 3rem;
    color: white;
}

/* Sponsor Info */
.sponsor-info h4 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.sponsor-description {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 0;
}

/* Become a Sponsor Section */
.become-sponsor {
    background: white;
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    border: 2px solid #005A9C;
    max-width: 800px;
    margin: 0 auto;
}

.become-sponsor h3 {
    font-size: 2rem;
    color: #005A9C;
    margin-bottom: 1rem;
    font-weight: 700;
}

.become-sponsor p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.sponsor-contact {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.1rem;
    color: #005A9C;
    font-weight: 500;
}

.contact-item i {
    font-size: 1.3rem;
}

/* Footer */
.footer {
    background: #000000;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    color: #005A9C;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
}

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

.social-link {
    color: #d1d5db;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* Footer Accessibility Notice */
.footer-notice {
    background: #0b0b0b;
    border-top: 1px solid #1f2937;
    border-bottom: 1px solid #1f2937;
    padding: 1rem 0;
    margin: 0 0 1rem 0;
}

.footer-notice p {
    margin: 0;
    color: #e5e7eb;
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .title-sponsors {
        grid-template-columns: 1fr;
    }
    
    .supporting-sponsors {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .sponsors h2 {
        font-size: 2.2rem;
        text-align: center;
        margin-bottom: 2rem;
    }

    .section-subtitle {
        font-size: 1.1rem;
        text-align: center;
        margin-bottom: 2rem;
    }

    .title-sponsors {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 3rem;
    }

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

    .sponsor-card {
        padding: 1.5rem;
        text-align: center;
    }

    .sponsor-logo {
        min-height: 120px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 1rem;
    }

    .sponsor-logo img {
        max-width: 200px;
        max-height: 120px;
    }

    .placeholder-logo {
        width: 100px;
        height: 100px;
    }

    .placeholder-logo i {
        font-size: 2.5rem;
    }

    .become-sponsor {
        padding: 2rem;
    }

    .become-sponsor h3 {
        font-size: 1.6rem;
    }

    .sponsor-contact {
        flex-direction: column;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .sponsors h2 {
        font-size: 1.8rem;
    }

    .sponsor-card {
        padding: 1.2rem;
    }

    .become-sponsor {
        padding: 1.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: auto;
}