/* ============================================
   BURGER MENU - FULLSCREEN OVERLAY STYLE
   Matches Royal College (royalcollege.lk)
   Logo LEFT, Menu items RIGHT
   ============================================ */

/* ---- Burger Button (Top Right ☰) ---- */
.burger-btn {
    position: fixed;
    top: 25px;
    right: 30px;
    z-index: 10000;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    transition: all 0.3s ease;
}

.burger-btn span {
    display: block;
    width: 30px;
    height: 2px;
    background-color: var(--primary);
    transition: all 0.3s ease;
}

.burger-btn:hover span {
    background-color: var(--secondary);
}

/* When menu open - hide burger lines (X is shown by close-menu button) */
.burger-btn.active {
    opacity: 0;
    pointer-events: none;
}


/* ---- Fullscreen Menu Overlay ---- */
.burger-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 11, 26, 0.97);
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    display: flex;
    overflow: hidden;
}

.burger-menu.active {
    opacity: 1;
    visibility: visible;
}

/* Staggered fade-in animation for menu items */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.burger-menu.active .burger-menu-nav > li {
    animation: fadeInLeft 0.4s ease forwards;
    opacity: 0;
}

.burger-menu.active .burger-menu-nav > li:nth-child(1) { animation-delay: 0.1s; }
.burger-menu.active .burger-menu-nav > li:nth-child(2) { animation-delay: 0.15s; }
.burger-menu.active .burger-menu-nav > li:nth-child(3) { animation-delay: 0.2s; }
.burger-menu.active .burger-menu-nav > li:nth-child(4) { animation-delay: 0.25s; }
.burger-menu.active .burger-menu-nav > li:nth-child(5) { animation-delay: 0.3s; }
.burger-menu.active .burger-menu-nav > li:nth-child(6) { animation-delay: 0.35s; }
.burger-menu.active .burger-menu-nav > li:nth-child(7) { animation-delay: 0.4s; }
.burger-menu.active .burger-menu-nav > li:nth-child(8) { animation-delay: 0.45s; }
.burger-menu.active .burger-menu-nav > li:nth-child(9) { animation-delay: 0.5s; }
.burger-menu.active .burger-menu-nav > li:nth-child(10) { animation-delay: 0.55s; }

.burger-menu.active .menu-logo-section {
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

/* Menu overlay for JS compatibility */
.menu-overlay {
    display: none;
}


/* ---- Menu Inner Layout: Logo Left | Nav Right ---- */
.burger-menu-header {
    display: none; /* Hide default header, we use custom layout */
}

.burger-menu-body {
    display: flex;
    width: 100%;
    height: 100%;
    padding: 0;
}

/* Left side - Logo/Crest */
.burger-menu-body::before {
    content: '';
    flex: 0 0 40%;
    /* Logo section handled by .menu-logo-section */
}

.menu-logo-section {
    position: absolute;
    top: 25%;
    left: 8%;
    transform: translateY(-50%);
    text-align: center;
}

.menu-logo-section img {
    width: 450px;
    height: 450px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.15;
}


/* ---- Close Button (Top Right X) ---- */
.close-menu {
    position: fixed;
    top: 25px;
    right: 30px;
    z-index: 10002;
    background: transparent;
    border: none;
    color: white;
    font-size: 36px;
    cursor: pointer;
    line-height: 1;
    padding: 5px 10px;
    transition: all 0.3s ease;
    font-weight: 300;
}

.close-menu:hover {
    color: var(--secondary);
    transform: rotate(90deg);
}


/* ---- Navigation Links (Right Side, Scrollable) ---- */
.burger-menu-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 60%;
    margin-left: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    height: 100vh;
    overflow-y: auto;
    padding: 100px 10% 60px 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(212, 175, 55, 0.3) transparent;
}

.burger-menu-nav::-webkit-scrollbar {
    width: 4px;
}

.burger-menu-nav::-webkit-scrollbar-thumb {
    background: rgba(212, 175, 55, 0.3);
    border-radius: 4px;
}

.burger-menu-nav > li {
    margin: 0;
    border: none;
    text-align: right;
    flex-shrink: 0;
}

/* Menu Links */
.burger-menu-nav a,
.burger-menu-nav .menu-item-toggle {
    display: block;
    padding: 14px 0;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 400;
    font-size: 22px;
    transition: all 0.3s ease;
    border: none;
    background: transparent;
    width: 100%;
    text-align: right;
    cursor: pointer;
    letter-spacing: 0.5px;
}

/* Hide icons in nav - Royal College uses text only */
.burger-menu-nav a i,
.burger-menu-nav .menu-item-toggle i:not(.toggle-icon) {
    display: none;
}

.burger-menu-nav a:hover,
.burger-menu-nav .menu-item-toggle:hover {
    color: var(--secondary);
    transform: translateX(-8px);
}

.burger-menu-nav a.active {
    color: var(--secondary);
    text-decoration: underline;
    text-underline-offset: 6px;
}

/* Underline animation on hover */
.burger-menu-nav > li > a::after,
.burger-menu-nav > li > .menu-item-toggle::after {
    content: '';
    display: block;
    width: 0;
    height: 1px;
    background: var(--secondary);
    transition: width 0.3s ease;
    margin-left: auto;
}

.burger-menu-nav > li > a:hover::after,
.burger-menu-nav > li > .menu-item-toggle:hover::after {
    width: 100%;
}

/* ---- Submenu Toggle ---- */
.menu-item-with-submenu {
    position: relative;
}

.menu-item-toggle {
    cursor: pointer;
}

.menu-item-toggle .toggle-icon {
    transition: transform 0.3s ease;
    font-size: 12px;
    margin-left: 8px;
    color: rgba(255, 255, 255, 0.5);
}

.menu-item-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

/* ---- Submenu ---- */
.burger-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: right;
}

.burger-submenu.active {
    max-height: 500px;
}

.burger-submenu li {
    border: none;
    opacity: 0;
    transform: translateX(15px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.burger-submenu.active li {
    opacity: 1;
    transform: translateX(0);
}

.burger-submenu.active li:nth-child(1) { transition-delay: 0.05s; }
.burger-submenu.active li:nth-child(2) { transition-delay: 0.1s; }
.burger-submenu.active li:nth-child(3) { transition-delay: 0.15s; }
.burger-submenu.active li:nth-child(4) { transition-delay: 0.2s; }
.burger-submenu.active li:nth-child(5) { transition-delay: 0.25s; }
.burger-submenu.active li:nth-child(6) { transition-delay: 0.3s; }

.burger-submenu a {
    font-size: 16px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.6);
    padding: 10px 0;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
}

.burger-submenu a:hover {
    color: var(--secondary);
}


/* ---- Body Scroll Lock ---- */
body.menu-open {
    overflow: hidden;
}


/* ============================================
   SITE HEADER LOGO (Top Left)
   ============================================ */
.site-header-logo {
    position: fixed;
    top: 15px;
    left: 20px;
    z-index: 900;
    max-width: 300px;
    transition: all 0.3s ease;
}

.site-header-logo img {
    height: 55px;
    width: 55px;
    object-fit: contain;
    flex-shrink: 0;
}

.site-header-logo a {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-header-logo .logo-text {
    display: flex;
    flex-direction: column;
}

.site-header-logo .logo-text h1 {
    font-family: 'Playfair Display', Georgia, serif !important;
    font-size: 16px;
    margin: 0;
    color: var(--primary);
    line-height: 1.2;
    font-weight: 700 !important;
    letter-spacing: 0.5px;
    text-transform: none !important;
    transition: color 0.3s ease;
}

.site-header-logo .logo-text small {
    font-size: 11px;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}


/* ---- Header Scroll Effect ---- */
body.scrolled .site-header-logo {
    background: rgba(0, 33, 71, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 8px 15px;
    border-radius: 0 0 8px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

body.scrolled .site-header-logo .logo-text h1 {
    color: white;
}

body.scrolled .site-header-logo img {
    height: 45px;
    width: 45px;
}


/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 767px) {
    .site-header-logo .logo-text {
        display: none;
    }

    .burger-btn {
        top: 20px;
        right: 20px;
    }

    .close-menu {
        top: 20px;
        right: 20px;
    }

    .burger-menu-nav {
        width: 100%;
        padding: 80px 30px 30px;
        justify-content: flex-start;
    }

    .burger-menu-nav a,
    .burger-menu-nav .menu-item-toggle {
        font-size: 18px;
        text-align: right;
        padding: 12px 0;
    }

    .menu-logo-section {
        display: none;
    }
}

@media (min-width: 992px) {
    .burger-btn {
        top: 30px;
        right: 40px;
    }

    .close-menu {
        top: 30px;
        right: 40px;
    }

    .burger-menu-nav a,
    .burger-menu-nav .menu-item-toggle {
        font-size: 24px;
        padding: 16px 0;
    }
}