/* Global Styles */
:root {
    --color-dark: #1a365d;
    --color-primary: #2d5a8c;
    --color-accent: #3b82f6;
    --color-light: #e8f0f8;
    --color-gray: #64748b;
    --color-border: #cbd5e1;
    --font-serif: 'Syne', sans-serif;
    --font-sans: 'Inter', sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-dark);
    background-color: #ffffff;
    line-height: 1.8;
    font-size: 16px;
    letter-spacing: 0.3px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -1px;
}

h2 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

h3 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

h4 {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-lg);
    color: #374151;
    line-height: 1.8;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Navbar */
.navbar {
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: var(--spacing-md) 0;
}

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

.nav-brand a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-dark);
}

.nav-brand svg {
    display: flex;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-dark);
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-dark);
    transition: all 0.3s ease;
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-2xl) 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: #2563eb;
    color: white;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--color-dark);
    border-color: var(--color-border);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #e8f0f8 0%, #d0dce8 100%);
    padding: var(--spacing-2xl) 0;
    display: flex;
    align-items: center;
    min-height: 500px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-text h1 {
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
    line-height: 1.8;
    font-size: 3.5rem;
    letter-spacing: -1px;
}

.hero-text .subtitle {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    line-height: 1.5;
}

.hero-text .lead {
    font-size: 1.1rem;
    line-height: 1.9;
    color: #374151;
    margin-bottom: var(--spacing-lg);
}

.hero-text .invitation {
    background-color: rgba(59, 130, 246, 0.08);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
    margin: var(--spacing-lg) 0;
    border-radius: 0.25rem;
    font-style: italic;
    color: #374151;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(45, 90, 140, 0.1) 100%);
    border-radius: 1rem;
    min-height: 300px;
    font-size: 2rem;
    text-align: center;
    color: var(--color-gray);
}

.hero-image img {
    width: 300px;
    max-width: 100%;
    height: auto;
    display: block;
}

/* Section Styles */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.section-title p {
    font-size: 1.1rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Event Cards */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.event-card {
    background-color: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.event-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.event-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
    line-height: 1.5;
}

.event-meta {
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    line-height: 1.7;
}

.event-description {
    flex-grow: 1;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    color: #374151;
    line-height: 1.8;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-dark) 100%);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: 1rem;
    text-align: center;
    margin: var(--spacing-2xl) 0;
}

.cta-section h2 {
    color: white;
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.cta-highlight {
    font-weight: 600;
    color: #60a5fa;
}

.cta-section .btn-primary {
    margin-top: var(--spacing-md);
}

.cta-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
    margin-top: var(--spacing-md);
    font-style: italic;
    line-height: 1.7;
}

/* Resource Cards */
.resource-section {
    margin-bottom: var(--spacing-xl);
}

.resource-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    line-height: 1.5;
}

.resource-list {
    list-style: none;
    display: grid;
    gap: var(--spacing-md);
}

.resource-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.resource-list a {
    flex-grow: 1;
    padding: var(--spacing-md);
    background-color: var(--color-light);
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    line-height: 1.7;
}

.resource-list a:hover {
    border-left-color: var(--color-accent);
    background-color: rgba(59, 130, 246, 0.12);
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.team-member {
    text-align: center;
}

.member-photo { 
    width: 200px; 
    height: 200px; 
    margin: 0 auto var(--spacing-md); 
    background: linear-gradient(135deg, #d0dce8 0%, #e0e8f0 100%); 
    border-radius: 1rem; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 3rem; 
    color: var(--color-gray); 
    border: 2px solid var(--color-border); 
    overflow: hidden; 
} 

.member-photo img { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    display: block; 
}

.team-member h3 {
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.member-role {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.member-bio {
    font-size: 0.9rem;
    color: #374151;
    line-height: 1.8;
}

/* Footer */
.footer {
    background-color: var(--color-dark);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.footer-note {
    font-size: 0.85rem;
    font-style: italic;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.85);
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--color-accent);
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-2xl: 2rem;
    }

    h1 {
        font-size: 2.5rem;
        line-height: 1.6;
        letter-spacing: -0.5px;
    }

    h2 {
        font-size: 1.75rem;
        line-height: 1.6;
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .hero-image {
        min-height: 300px;
        font-size: 2rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background-color: white;
        border-top: 1px solid var(--color-border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 500px;
    }

    .nav-menu li {
        border-bottom: 1px solid var(--color-border);
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: var(--spacing-md);
        border-bottom: none;
        border-left: 3px solid transparent;
    }

    .nav-menu a.active {
        border-left-color: var(--color-accent);
        border-bottom: none;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(10px, 10px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    .hero-buttons {
        gap: var(--spacing-sm);
    }

    .events-grid {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .cta-section {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
        line-height: 1.4;
        letter-spacing: -0.25px;
    }

    h2 {
        font-size: 1.25rem;
        line-height: 1.4;
    }

    .nav-brand span {
        display: none;
    }

    body {
        font-size: 14px;
        line-height: 1.8;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .hero {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* Sponsor logo grid */
.sponsor-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px 14px;
    margin: 20px 0;
    max-width: 360px;
}

/* Individual sponsor logo */
.sponsor-grid a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 55px;
    padding: 6px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 6px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Logo image */
.sponsor-grid img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Optional hover effect */
.sponsor-grid a:hover {
    transform: translateY(-2px);
    opacity: 0.85;
}

/* Mobile adjustment */
@media (max-width: 600px) {
    .sponsor-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        max-width: 100%;
    }

    .sponsor-grid a {
        width: 80px;
        height: 48px;
    }
}