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

:root {
    --srs-primary: #003366;      /* deep navy blue */
    --srs-secondary: #1a4d8c;
    --srs-accent: #c0392b;       /* rich red accent */
    --srs-light-bg: #f4f7fc;
    --srs-card-border: #e2e8f0;
    --srs-text-dark: #1e2a3e;
    --srs-text-muted: #4a627a;
    --srs-gold: #b68b40;
}

main {
    font-family: 'Inter', 'Segoe UI', Roboto, system-ui, sans-serif;
    background-color: #f0f4f9;
    color: var(--srs-text-dark);
    line-height: 1.55;
}

.landing-wrapper {
    background: linear-gradient(145deg, #eef2f7 0%, #ffffff 100%);
    padding: 2rem 0 3rem 0;
}

.container-main {
    max-width: 1280px;
    margin: 0 auto;
    background: white;
    border-radius: 32px;
    box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    padding: 2rem 2rem 2.5rem 2rem;
}

/* header styling */
.meeting-header {
    background: linear-gradient(135deg, var(--srs-primary) 0%, #1a4a7a 100%);
    border-radius: 28px;
    padding: 2rem 2rem;
    margin-bottom: 2.5rem;
    color: white;
    position: relative;
    overflow: hidden;
}

.meeting-header::after {
    content: "✨";
    font-size: 180px;
    opacity: 0.08;
    position: absolute;
    right: -20px;
    bottom: -40px;
    pointer-events: none;
}

.meeting-header h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 2.7rem;
    letter-spacing: -0.02em;
    color: white;
    margin-bottom: 0.5rem;
}

.meeting-header .subhead {
    font-size: 1.3rem;
    font-weight: 500;
    opacity: 0.92;
}

.region-date {
    background: rgba(255,255,255,0.15);
    display: inline-block;
    padding: 0.4rem 1.2rem;
    border-radius: 40px;
    backdrop-filter: blur(2px);
    font-weight: 600;
    margin-top: 1rem;
}

h2 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1.85rem;
    color: var(--srs-primary);
    border-left: 5px solid var(--srs-accent);
    padding-left: 1rem;
    margin: 1.8rem 0 1.2rem 0;
}

h3 {
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--srs-secondary);
    margin-top: 1.6rem;
    margin-bottom: 0.75rem;
}

.badge-date {
    background: #eef2ff;
    color: var(--srs-primary);
    font-weight: 600;
    padding: 0.3rem 0.9rem;
    border-radius: 30px;
    font-size: 0.85rem;
}

.important-dates-grid {
    background: var(--srs-light-bg);
    border-radius: 24px;
    padding: 1.5rem 1.8rem;
    margin: 1.8rem 0;
    border: 1px solid #dce5ef;
}

.date-item {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.date-label {
    font-weight: 700;
    min-width: 120px;
    color: #0b355c;
}

.date-value {
    font-weight: 500;
    color: #2c3e66;
}

.alert-info-custom {
    background: #e9f0f9;
    border-left: 4px solid var(--srs-accent);
    border-radius: 20px;
    padding: 1rem 1.6rem;
    margin: 1.5rem 0;
}

.btn-submit-abstract {
    background: linear-gradient(95deg, var(--srs-primary), #1f6392);
    border: none;
    color: white;
    font-weight: 700;
    padding: 1rem 2rem;
    font-size: 1.25rem;
    border-radius: 60px;
    transition: all 0.25s ease;
    box-shadow: 0 8px 18px rgba(0,51,102,0.2);
    width: 100%;
    max-width: 500px;
    letter-spacing: 0.3px;
}

.btn-submit-abstract:hover {
    transform: translateY(-3px);
    background: linear-gradient(95deg, #002952, #0e4b73);
    box-shadow: 0 15px 25px -8px rgba(0,0,0,0.25);
    color: white;
}

.card-category {
    background: white;
    border-radius: 20px;
    border: 1px solid var(--srs-card-border);
    transition: all 0.2s;
    height: 100%;
    padding: 0.9rem 1rem;
    font-weight: 500;
    box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}

.card-category:hover {
    border-color: var(--srs-secondary);
    background: #fafdff;
    transform: translateY(-2px);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
    margin: 1.2rem 0;
}

.footer-note {
    background: var(--srs-primary);
    border-radius: 28px;
    color: white;
    padding: 1.8rem;
    text-align: center;
    margin-top: 2.5rem;
}

hr.divider {
    opacity: 0.3;
    margin: 2rem 0;
}

.text-highlight {
    color: var(--srs-accent);
    font-weight: 600;
}

@media (max-width: 768px) {
    .container-main {
        padding: 1.5rem;
    }
    .meeting-header h1 {
        font-size: 1.9rem;
    }
    .btn-submit-abstract {
        font-size: 1rem;
        padding: 0.8rem 1.2rem;
    }
    .date-label {
        min-width: 160px;
    }
}