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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #4B5563;
    background-color: #f4f4f4;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: #FFFFFF;
    color: #003366;
    padding: 40px 0;
    text-align: center;
    border-bottom: 2px solid #D4D9E2;
}

.header-logo {
    max-width: 350px;
    width: 100%;
    height: auto;
    margin: 0 auto 15px;
    display: block;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #003366;
}

.tagline {
    font-size: 1.2rem;
    color: #4B5563;
    opacity: 1;
}

/* Navigation */
nav {
    background: #003366;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #D4D9E2;
}

nav .container {
    position: relative;
}

/* Hamburger Menu Button */
.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 101;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: #FFFFFF;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: #FFFFFF;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

nav ul li a:hover,
nav ul li a:active {
    opacity: 0.8;
}

/* Main Content */
main {
    background-color: white;
}

.section {
    padding: 60px 0;
    border-bottom: 1px solid #e5e5e5;
}

.section:last-child {
    border-bottom: none;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #003366;
}

.section h3 {
    font-size: 1.5rem;
    margin-top: 20px;
    margin-bottom: 15px;
    color: #003366;
}

.section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #4B5563;
}

/* About highlights */
.about-highlights {
    margin-top: 10px;
    margin-bottom: 15px;
    padding-left: 20px;
}

.about-highlights li {
    margin-bottom: 6px;
}

/* Event Details */
.event-details {
    display: flex;
    gap: 40px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.detail-item {
    flex: 1;
    min-width: 250px;
    padding: 20px;
    background: #E5F2FF;
    border: 1px solid #D4D9E2;
    border-left: 4px solid #003366;
    border-radius: 4px;
}

.detail-item h3 {
    margin-top: 0;
    font-size: 1.3rem;
    color: #003366;
}

.detail-item p {
    font-size: 1.2rem;
    font-weight: 500;
    color: #4B5563;
}

/* Key Dates */
.key-dates {
    list-style: none;
    margin-top: 20px;
}

.key-dates li {
    font-size: 1.1rem;
    padding: 15px 20px;
    margin-bottom: 10px;
    background: #E5F2FF;
    border: 1px solid #D4D9E2;
    border-left: 4px solid #003366;
    border-radius: 4px;
    line-height: 1.6;
    color: #4B5563;
}

/* Key Dates Table */
.key-dates-table {
    width: 100%;
    max-width: 700px;
    margin-top: 20px;
    border-collapse: collapse;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.key-dates-table thead {
    background: #003366;
    color: #FFFFFF;
}

.key-dates-table th {
    padding: 15px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 1.1rem;
}

.key-dates-table th:first-child {
    width: 120px;
    white-space: nowrap;
}

.key-dates-table tbody tr {
    border-bottom: 1px solid #D4D9E2;
}

.key-dates-table tbody tr:last-child {
    border-bottom: none;
}

.key-dates-table tbody tr:nth-child(even) {
    background: #F7FAFF;
}

.key-dates-table tbody tr:nth-child(odd) {
    background: #FFFFFF;
}

.key-dates-table td {
    padding: 15px 20px;
    color: #4B5563;
    font-size: 1.05rem;
}

.key-dates-table td:first-child {
    font-weight: 500;
    color: #003366;
    width: 120px;
    white-space: nowrap;
}

.key-dates-table td:last-child {
    font-weight: 600;
}

/* Button Styles */
a.btn {
    display: inline-block;
    padding: 5px 10px;
    margin: 10px 10px 10px 0;
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none !important;
    border-radius: 6px;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    border: 2px solid #003366;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

a.btn-primary {
    background-color: #003366;
    color: #FFFFFF !important;
}

a.btn-primary:hover {
    background-color: #004080;
    border-color: #004080;
    color: #FFFFFF !important;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}

a.btn-secondary {
    background-color: #FFFFFF;
    color: #003366 !important;
}

a.btn-secondary:hover {
    background-color: #E5F2FF;
    color: #003366 !important;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}

/* Footer */
footer {
    background: #003366;
    color: #FFFFFF;
    text-align: center;
    padding: 30px 0;
    margin-top: 0;
}

footer a {
    color: #FFFFFF;
    text-decoration: none;
    transition: text-decoration 0.3s ease;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-logo {
        max-width: 210px;
    }

    header h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    /* Mobile Navigation with Hamburger */
    nav {
        padding: 10px 0;
    }

    nav .container {
        display: flex;
        justify-content: flex-end;
        align-items: center;
    }

    .hamburger {
        display: flex;
    }

    nav ul {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: #003366;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        padding: 0;
    }

    nav ul.active {
        max-height: 400px;
    }

    nav ul li {
        margin: 0;
        width: 100%;
        text-align: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    nav ul li a {
        display: block;
        padding: 15px 20px;
        font-size: 1.05rem;
    }

    nav ul li a:active {
        background-color: rgba(255, 255, 255, 0.1);
    }

    .section {
        padding: 40px 0;
    }

    .section h2 {
        font-size: 1.5rem;
    }

    /* Mobile Table Optimization */
    .key-dates-table {
        font-size: 0.95rem;
    }

    .key-dates-table th,
    .key-dates-table td {
        padding: 10px 12px;
    }

    .key-dates-table th {
        font-size: 1rem;
    }

    .key-dates-table td {
        font-size: 0.95rem;
    }
}