/* GLOBAL LAYOUT */
body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background: linear-gradient(to bottom, #f0f4fa, #ffffff);
    padding-left: 240px;
}

/* Centered content container */
header.hero,
main,
section,
footer {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

/* SIDEBAR */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 240px;
    height: 100vh;
    background: linear-gradient(to bottom, #1a3c6e, #0f274a);
    padding: 1rem 1rem;
    box-shadow: 4px 0 12px rgba(0,0,0,0.15);
    color: white;
    z-index: 1000;
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
}

.sidebar h3 {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.sidebar a {
    display: block;
    color: #ffdd55;
    text-decoration: none;
    padding: 0.55rem 0.5rem;
    margin-bottom: 0.25rem;
    border-radius: 6px;
    font-weight: bold;
    font-size: 0.92rem;
}

.sidebar a:hover {
    background: rgba(255,255,255,0.15);
}

/* ACTIVE MENU ITEM */
.sidebar a.active,
.submenu.active {
    background: rgba(255,255,255,0.18);
    color: #ffffff;
    font-weight: bold;
    border-left: 3px solid #ffdd55;
}

/* COLLAPSIBLE MENU */
.menu-collapsible {
    margin-top: 1.2rem;
    padding: 0.6rem 0.5rem;
    font-size: 0.95rem;
    font-weight: bold;
    color: #ffffff;
    background: rgba(255,255,255,0.12);
    border-left: 4px solid #ffdd55;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-collapsible .arrow {
    transition: transform 0.25s ease;
}

.menu-collapsible.open .arrow {
    transform: rotate(90deg);
}

/* SUBMENU CONTAINER */
.submenu-container {
    display: none;
    margin-left: 0.5rem;
    border-left: 2px solid rgba(255,255,255,0.15);
    padding-left: 0.5rem;
}

/* SUBMENU ITEMS */
.submenu {
    padding: 0.5rem 0.5rem 0.5rem 1.8rem;
    font-size: 0.88rem;
    color: #ffeaa7;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
    display: block;
}

.submenu:hover {
    background: rgba(255,255,255,0.12);
    border-left: 2px solid #ffdd55;
    color: #ffffff;
}

/* MOBILE MENU */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 15px;
    left: 15px;
    font-size: 2rem;
    color: #1a3c6e;
    background: #ffdd55;
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    z-index: 2000;
    cursor: pointer;
}

@media (max-width: 900px) {
    .mobile-menu-btn { display: block; }
    body { padding-left: 0; }
    .sidebar { transform: translateX(-260px); transition: 0.3s; }
    .sidebar.open { transform: translateX(0); }
}

/* HERO BANNER */
.hero {
    margin: 0 0 2rem 0;
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
}

/* CONTENT BOX */
.smooth-intro {
    background: white;
    border-radius: 16px;
    padding: 3rem 2.5rem;
    box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}

.invitation h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #1a3c6e;
}

/* FOOTER */
.site-footer {
    background: linear-gradient(to right, #0f274a, #1a3c6e);
    color: white;
    padding: 2.5rem 1rem;
    margin-top: 4rem;
    border-radius: 12px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    height: 60px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-text {
    text-align: right;
}

.deadline-box {
    background: #f7f9ff;
    border-left: 5px solid #1a3c6e;
    padding: 1.5rem 1.8rem;
    border-radius: 12px;
    margin-top: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.deadline-box h3 {
    margin-top: 0;
    color: #1a3c6e;
    font-size: 1.3rem;
}

.deadline-date {
    font-size: 1.6rem;
    font-weight: bold;
    color: #0f274a;
    margin-top: 0.5rem;
}

.download-box {
    background: #f7f9ff;
    border-left: 5px solid #1a3c6e;
    padding: 1.5rem 1.8rem;
    border-radius: 12px;
    margin: 1.5rem 0 2rem 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.download-button {
    display: inline-block;
    background: #1a3c6e;
    color: white;
    padding: 0.7rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.2s ease;
}

.download-button:hover {
    background: #274d8a;
}

/* CONTACT PAGE MODERN STYLING */
.contact-card {
    background: #f7f7f7;
    padding: 20px 25px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    margin-bottom: 25px;
}

.contact-card ul {
    list-style: none;
    padding-left: 0;
}

.contact-card li {
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.contact-icon {
    margin-right: 8px;
    color: #005bbb;
    font-weight: bold;
}

.contact-card a {
    color: #005bbb;
    text-decoration: none;
    font-weight: 600;
}

.contact-card a:hover {
    text-decoration: underline;
}
.download-icon::after {
    content: "📄⬇️";
    margin-left: 6px;
    font-size: 1.1em;
    vertical-align: middle;
}