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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: #ffffff;
    color: #0f172a;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2.2rem 6%;
    background-color: #ffffff;
    border-bottom: 1px solid #f1f5f9;
}

.logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.4rem;
    text-transform: uppercase;
    letter-spacing: -0.04em;
    color: #0f172a;
}

nav a {
    text-decoration: none;
    color: #475569;
    margin-left: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
}

nav .btn {
    background-color: #0f172a;
    color: #ffffff;
    padding: 0.6rem 1.4rem;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

nav .btn:hover {
    background: #2563eb;
}

.split-viewport {
    display: flex;
    min-height: 78vh; 
    border-bottom: 1px solid #e2e8f0;
}

.split-side {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 8%;
}

.host-side {
    background-color: #f8fafc;
    border-right: 1px solid #e2e8f0;
}

.advertiser-side {
    background-color: #f1f5f9;
}

.side-content {
    max-width: 480px;
}

.category-tag {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    display: block;
    margin-bottom: 1.2rem;
}

.host-side .category-tag { color: #059669; }
.advertiser-side .category-tag { color: #2563eb; }

.split-side h2 {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 2.6rem;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: #0f172a;
    margin-bottom: 1.5rem;
}

.split-side p {
    color: #475569;
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    font-weight: 400;
}

.action-btn {
    display: inline-block;
    text-decoration: none;
    font-family: 'Syne', sans-serif;
    padding: 1.1rem 2.2rem;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.2s ease;
}

.host-btn {
    background-color: #0f172a;
    color: #ffffff;
}

.host-btn:hover {
    background-color: #059669;
    transform: translateY(-2px);
}

.advertiser-btn {
    border: 2px solid #0f172a;
    color: #0f172a;
}

.advertiser-btn:hover {
    background-color: #2563eb;
    border-color: #2563eb;
    color: #ffffff;
    transform: translateY(-2px);
}

.digital-section {
    padding: 8rem 6%;
    background-color: #0f172a;
    color: #ffffff;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

.digital-section h2 {
    font-family: 'Syne', sans-serif;
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.digital-section p {
    color: #94a3b8;
    font-size: 1.15rem;
    line-height: 1.6;
}

.contact-section {
    padding: 8rem 6%;
    text-align: center;
    background-color: #ffffff;
    border-top: 1px solid #f1f5f9;
}

.contact-section h2 {
    font-family: 'Syne', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.contact-section p {
    color: #475569;
    margin-bottom: 2.5rem;
}

.email-link {
    font-family: 'Syne', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: #0f172a;
    text-decoration: none;
    letter-spacing: -0.02em;
    border-bottom: 3px solid #0f172a;
    transition: color 0.2s, border-color 0.2s;
}

.email-link:hover {
    color: #2563eb;
    border-bottom-color: #2563eb;
}

footer {
    text-align: center;
    padding: 3.5rem 2rem;
    background-color: #f8fafc;
    color: #64748b;
    font-size: 0.85rem;
    border-top: 1px solid #e2e8f0;
}

.subpage-hero {
    padding: 7rem 6% 4rem 6%;
    border-bottom: 1px solid #e2e8f0;
}

.host-hero-bg {
    background: radial-gradient(circle at 90% 80%, rgba(5, 150, 105, 0.04) 0%, #ffffff 70%);
}

.sponsor-hero-bg {
    background: radial-gradient(circle at 90% 80%, rgba(37, 99, 235, 0.04) 0%, #ffffff 70%);
}

.subpage-hero h1 {
    font-family: 'Syne', sans-serif;
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: #0f172a;
    margin-bottom: 1.5rem;
    max-width: 850px;
    line-height: 1.1;
}

.subpage-hero p {
    font-size: 1.25rem;
    color: #475569;
    max-width: 680px;
}

.details-section {
    padding: 7rem 6%;
    background-color: #ffffff;
}

.detail-block {
    max-width: 750px;
    margin-bottom: 4rem;
}

.detail-block h3 {
    font-family: 'Syne', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 0.85rem;
    letter-spacing: -0.02em;
}

.detail-block p {
    color: #475569;
    font-size: 1.08rem;
    line-height: 1.6;
}

@media (max-width: 968px) {
    .split-viewport { flex-direction: column; }
    .host-side { border-right: none; border-bottom: 1px solid #e2e8f0; }
    .split-side { padding: 5rem 6%; }
    .split-side h2 { font-size: 2.1rem; }
}