.main-header { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 2rem; height: 56px; border-bottom: 1px solid var(--border-light); background-color: var(--bg-light); position: sticky; top: 0; z-index: 100; }
html.dark-mode .main-header { border-bottom-color: var(--border-dark); background-color: var(--bg-dark-secondary); }
.logo-container { display: flex; align-items: center; gap: 0.75rem; justify-self: start; grid-column: 1; }
.header-logo { height: 35px; }
.header-actions { justify-self: end; display: flex; align-items: center; gap: 1rem; grid-column: 3; }

.main-nav { display: flex; justify-content: center; align-items: center; gap: 1.5rem; grid-column: 2; }
.main-nav a { text-decoration: none; color: inherit; font-weight: 500; }
.nav-separator { color: #ccc; margin: 0 0rem; font-weight: 300; }
html.dark-mode .nav-separator { color: #555; }

.user-profile-container { position: relative; }
.user-profile-photo { width: 35px; height: 35px; border-radius: 50%; cursor: pointer; border: 2px solid transparent; transition: border-color 0.2s ease-in-out; display: block; }
.user-profile-photo:hover { border-color: var(--primary-color); }
.user-profile-menu { position: absolute; top: calc(100% + 10px); right: 0; background-color: #ffffff; border: 1px solid #e5e7eb !important; border-radius: 8px; min-width: 240px; z-index: 1000; padding: 0 !important; overflow: hidden; transition: opacity 0.15s ease-out, transform 0.15s ease-out; transform-origin: top right; box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2); }
html.dark-mode .user-profile-menu { background-color: #252525 !important; border-color: #3f3f46 !important; }
#userProfileMenu.hidden { display: none !important; opacity: 0; transform: scale(0.95) translateY(-10px); }
#userProfileMenu:not(.hidden) { display: block !important; opacity: 1; transform: scale(1) translateY(0); animation: profileSlideIn 0.15s ease-out; }
@keyframes profileSlideIn { from { opacity: 0; transform: scale(0.95) translateY(-10px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.menu-item-link { display: flex; align-items: center; padding: 8px 10px; color: inherit; text-decoration: none; border-radius: 4px; transition: background-color 0.2s ease-in-out; font-size: 14px; }
.menu-item-link:hover { background-color: var(--secondary-color); }
html.dark-mode .menu-item-link:hover { background-color: #333; }
.menu-item-link > i { width: 24px; text-align: center; margin-right: 10px; flex-shrink: 0; }
.nav-login-dropdown { position: relative; display: inline-block; }
.nav-login-dropdown > a { text-decoration: none; color: inherit; font-weight: 500; cursor: pointer; }
.nav-login-menu { display: none; position: absolute; top: 100%; right: 0; margin-top: 0.5rem; background-color: var(--bg-light); border: 1px solid var(--border-light); border-radius: 8px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); z-index: 1000; min-width: 200px; padding: 0.5rem 0; }
html.dark-mode .nav-login-menu { background-color: var(--bg-dark-secondary); border: 1px solid var(--border-dark); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4); }
.nav-login-menu.show { display: block; }
.nav-login-button { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1rem; color: var(--text-dark); text-decoration: none; transition: background-color 0.2s ease; }
html.dark-mode .nav-login-button { color: var(--text-light); }
.nav-login-button:hover { background-color: var(--secondary-color); }
html.dark-mode .nav-login-button:hover { background-color: #333; }
html.dark-mode #notification-dropdown { background-color: var(--bg-dark-secondary) !important; border: 1px solid var(--border-dark); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4); }

.main-footer { text-align: left; padding: 4rem 2rem; background-color: #f8f9fa; border-top: 1px solid var(--border-light); }
html.dark-mode .main-footer { background-color: #1a1a1a; border-top-color: var(--border-dark); }
.footer-content { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 3rem; }
.footer-column h4 { font-size: 1rem; font-weight: 700; margin-bottom: 1.25rem; color: var(--text-dark); text-transform: uppercase; letter-spacing: 0.05em; }
html.dark-mode .footer-column h4 { color: var(--text-light); }
.footer-logo { width: 40px; margin-bottom: 1rem; opacity: 0.8; }
.footer-tagline { font-size: 0.875rem; color: #6c757d; margin-top: 0.5rem; }
.footer-social-links { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.75rem; }
.footer-social-links a {
    width: 1.85rem;
    height: 1.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    text-decoration: none;
    color: #6c757d;
    border: 1px solid #d7dde3;
    background: #ffffff;
    transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.footer-social-links a:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { text-decoration: none; color: #6c757d; font-size: 0.95rem; transition: color 0.2s ease; }
html.dark-mode .footer-links a, html.dark-mode .footer-tagline { color: #a0aec0; }
html.dark-mode .footer-social-links a {
    color: #a0aec0;
    border-color: #3a3a3a;
    background: #222;
}
html.dark-mode .footer-social-links a:hover {
    color: #5aa7c7;
    border-color: #5aa7c7;
}
.footer-links a:hover { color: var(--primary-color); }
.footer-links a.disabled-link { pointer-events: none; opacity: 0.5; cursor: default; }

.mobile-disclaimer { display: none; padding: 1rem; margin-bottom: 2rem; background-color: #2c5282; color: #ffffff; border-radius: 8px; text-align: center; }
.mobile-disclaimer i { margin-right: 0.5rem; }
#mobile-menu-button { display: none; font-size: 1.5rem; padding: 0.5rem; }
#mobile-nav-close { display: none; position: absolute; top: 1rem; right: 1.5rem; font-size: 2rem; color: inherit; background: none; border: none; }
@media (max-width: 768px) {
    .main-header { display: flex; justify-content: space-between; height: auto; padding: 0.75rem 1rem; }
    .main-nav { position: fixed; top: 0; right: 0; width: 80%; height: 100%; background-color: var(--bg-dark-secondary); color: var(--text-light); flex-direction: column; justify-content: flex-start; align-items: flex-start; padding: 4rem 2rem; gap: 1.5rem; z-index: 2000; transform: translateX(100%); transition: transform 0.3s ease-in-out; display: flex; pointer-events: none; }
    .main-nav.mobile-nav-open { transform: translateX(0); pointer-events: auto; }
    #mobile-menu-button, #mobile-nav-close, .mobile-disclaimer { display: block; }
    .header-actions { grid-column: unset; justify-self: unset; }
    .nav-separator { display: none; }
    .main-footer { padding: 3rem 1.5rem; }
    .footer-content { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
    .footer-logo { margin: 0 auto 1rem auto; }
    .footer-social-links { justify-content: center; }
    #notification-dropdown:not(.hidden) { position: fixed; top: 4.5rem; left: 50%; transform: translateX(-50%); right: auto !important; width: 90vw; max-width: 400px; margin-top: 0; z-index: 2500; display: flex; flex-direction: column; }
    #notification-list { max-height: 60vh; overflow-y: auto; }
    .main-nav .nav-login-dropdown { position: relative; width: 100%; }
    .main-nav .nav-login-menu { position: static; display: none; width: 100%; box-shadow: none; border: none; margin-top: 0.5rem; padding: 0; background-color: transparent; }
    .main-nav .nav-login-menu.show { display: block; }
    .main-nav .nav-login-button { color: var(--text-light); background-color: #333; border-radius: 6px; justify-content: center; }
    .main-nav .nav-login-button:hover { background-color: #444; }
}