/* =====================================================
   DESA WEBSITE HEADER SYSTEM
   Professional UI Navigation - MOBILE OPTIMIZED
===================================================== */

/* ===============================
   ROOT VARIABLES
================================ */
:root {
    --header-bg: #007b55;
    --header-bg-scroll: rgba(0, 123, 85, 0.96);
    --header-text: #ffffff;
    --header-accent: #ffd700;
    --header-hover: #005c41;

    --header-height: 75px;
    --header-height-mobile: 65px;

    --transition-fast: .2s ease;
    --transition-normal: .3s ease;

    --shadow-soft: 0 2px 8px rgba(0, 0, 0, .08);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, .18);
    
    /* Tambahan: z-index layers */
    --z-header: 1000;
    --z-mobile-nav: 1001;
    --z-overlay: 999;
}

/* ===============================
   GLOBAL HEADER
================================ */
header.with-background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    background: var(--header-bg);
    box-shadow: var(--shadow-soft);
    z-index: var(--z-header);
    transition:
        background var(--transition-normal),
        box-shadow var(--transition-normal),
        padding var(--transition-normal);
    backface-visibility: hidden;
    will-change: transform;
}

/* ===============================
   HEADER SCROLL STATE
================================ */
header.with-background-overlay.scrolled {
    background: var(--header-bg-scroll);
    box-shadow: var(--shadow-medium);
}

/* ===============================
   LOGO
================================ */
.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: var(--header-text);
    flex-shrink: 0; /* Mencegah logo mengecil */
    z-index: var(--z-header); /* Pastikan logo di atas nav mobile */
}

.logo img {
    height: 50px;
    transition: transform var(--transition-fast);
    display: block; /* Mencegah spacing bawah */
}

.logo img:hover {
    transform: scale(1.05);
}

.logo h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--header-text);
    white-space: nowrap;
    line-height: 1.2;
}

/* ===============================
   NAVIGATION DESKTOP
================================ */
.main-nav {
    margin-left: auto;
    margin-right: 20px;
    display: block; /* Pastikan tampil di desktop */
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav a {
    display: block;
    padding: 10px 16px;
    font-size: .95rem;
    font-weight: 500;
    color: var(--header-text);
    text-decoration: none;
    border-radius: 6px;
    position: relative;
    transition:
        background var(--transition-fast),
        color var(--transition-fast);
    /* Optimasi touch untuk desktop juga */
    touch-action: manipulation;
}

.main-nav a:hover {
    background: rgba(255, 255, 255, .12);
}

.main-nav a.active {
    color: var(--header-accent);
    font-weight: 600;
}

.main-nav a::after {
    content: "";
    position: absolute;
    bottom: 6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--header-accent);
    transform: translateX(-50%);
    transition: width .25s ease;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 70%;
}

/* ===============================
   HEADER ACTIONS
================================ */
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    z-index: var(--z-header);
}

/* ===============================
   MOBILE MENU BUTTON
================================ */
.menu-toggle {
    display: none;
    font-size: 2rem;
    border: none;
    background: none;
    color: var(--header-text);
    cursor: pointer;
    padding: 6px;
    transition: transform var(--transition-fast);
    /* Optimasi touch */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    z-index: calc(var(--z-header) + 1); /* Di atas header */
}

.menu-toggle:hover {
    transform: scale(1.1);
}

.menu-toggle:active {
    transform: scale(0.95);
}

/* ===============================
   MOBILE NAVIGATION - PERBAIKAN UTAMA
================================ */
@media (max-width: 991px) {
    
    /* Reset header untuk mobile */
    header.with-background-overlay {
        height: var(--header-height-mobile);
        padding: 0 16px;
        justify-content: flex-start; /* Mulai dari kiri */
    }

    /* Logo mobile */
    .logo img {
        height: 40px;
    }
    
    .logo h1 {
        font-size: 1.15rem;
    }

    /* Menu toggle: tampilkan & posisikan */
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        margin-left: auto; /* Dorong ke kanan */
        order: 2;
    }

    /* Header actions: tetap di kanan, setelah toggle */
    .header-actions {
        order: 3;
        margin-left: 8px;
    }

    /* === MOBILE MENU CONTAINER === */
    .main-nav {
        /* Reset desktop styles */
        margin: 0 !important;
        
        /* Mobile positioning - gunakan fixed tapi di luar flow header */
        position: fixed;
        top: var(--header-height-mobile);
        left: 0;
        right: 0;
        width: 100%;
        
        /* Styling */
        background: var(--header-bg);
        box-shadow: var(--shadow-medium);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        
        /* Layout */
        display: none; /* Hidden by default */
        flex-direction: column;
        max-height: calc(100vh - var(--header-height-mobile));
        overflow-y: auto;
        overflow-x: hidden;
        
        /* Layering */
        z-index: var(--z-mobile-nav);
        
        /* Animasi */
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: 
            opacity var(--transition-fast),
            transform var(--transition-fast),
            visibility var(--transition-fast);
        
        /* Optimasi performa mobile */
        will-change: transform, opacity;
        -webkit-overflow-scrolling: touch; /* Smooth scroll iOS */
    }

    /* === MENU ACTIVE STATE === */
    .main-nav.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        animation: none; /* Gunakan transition saja, lebih smooth */
    }

    /* === MENU ITEMS === */
    .main-nav ul {
        flex-direction: column;
        width: 100%;
        padding: 8px 0;
        margin: 0;
        list-style: none;
    }

    .main-nav li {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    
    .main-nav li:last-child {
        border-bottom: none;
    }

    .main-nav a {
        display: flex;
        align-items: center;
        width: 100%;
        padding: 14px 20px;
        font-size: 1rem;
        font-weight: 500;
        color: var(--header-text);
        text-decoration: none;
        background: transparent;
        /* Optimasi touch target */
        min-height: 48px; /* Minimum touch target size */
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
        transition: background var(--transition-fast);
    }

    .main-nav a:hover,
    .main-nav a:active {
        background: var(--header-hover);
    }

    .main-nav a.active {
        color: var(--header-accent);
        background: rgba(255, 215, 0, 0.15);
        font-weight: 600;
    }

    /* Hilangkan underline animation di mobile (opsional) */
    .main-nav a::after {
        display: none;
    }
}

/* ===============================
   DESKTOP RESET (Pastikan tidak terpengaruh mobile)
================================ */
@media (min-width: 992px) {
    .menu-toggle {
        display: none !important;
    }
    
    .main-nav {
        position: static !important;
        display: block !important;
        width: auto !important;
        max-height: none !important;
        overflow: visible !important;
        transform: none !important;
        opacity: 1 !important;
        visibility: visible !important;
        background: transparent !important;
        box-shadow: none !important;
        border: none !important;
        z-index: auto !important;
    }
    
    .main-nav ul {
        flex-direction: row !important;
        padding: 0 !important;
    }
    
    .main-nav a::after {
        display: block !important; /* Tampilkan underline animation di desktop */
    }
}

/* ===============================
   BODY OFFSET (FIXED HEADER)
================================ */
body {
    padding-top: var(--header-height);
    scroll-padding-top: var(--header-height);
    /* Mencegah scroll jump saat menu toggle */
    transition: padding-top var(--transition-fast);
}

@media (max-width: 991px) {
    body {
        padding-top: var(--header-height-mobile);
        scroll-padding-top: var(--header-height-mobile);
    }
    
    /* Saat menu mobile terbuka, cegah scroll body */
    body.menu-open {
        overflow: hidden;
        position: fixed;
        width: 100%;
        top: calc(-1 * var(--header-height-mobile));
        padding-top: 0 !important; /* Override sementara */
    }
}

/* ===============================
   ANIMATIONS
================================ */
@keyframes navSlide {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===============================
   PRINT MODE
================================ */
@media print {
    header.with-background-overlay,
    .main-nav,
    .menu-toggle {
        display: none !important;
    }
    
    body {
        padding-top: 0 !important;
    }
}

/* ===============================
   ACCESSIBILITY & UX ENHANCEMENTS
================================ */
/* Focus visible untuk keyboard navigation */
.main-nav a:focus-visible,
.menu-toggle:focus-visible,
.header-actions button:focus-visible {
    outline: 2px solid var(--header-accent);
    outline-offset: 2px;
}

/* Reduce motion untuk pengguna yang sensitif */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --header-bg: #000;
        --header-text: #fff;
        --header-accent: #ff0;
    }
}