@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&family=Fira+Code:wght@300..700&display=swap');

:root {
    --bg-color: #000000;          /* Warna gelap solid (Hitam) */
    --sidebar-bg: #000000;        /* Warna gelap solid (Hitam) */
    --text-primary: #FFFFFF;      /* Teks terang (Putih) */
    --text-secondary: rgba(255, 255, 255, 0.7); /* Teks sekunder */
    
    --primary: #A6FF84;           /* Judul di background gelap (Vibrant Mint) */
    --primary-dark: #0E1B09;      /* Judul di background terang */
    --secondary: #A6FF84;         /* Warna sorotan */
    
    --card-bg: rgba(166, 255, 132, 0.03);
    --card-border: rgba(255, 255, 255, 0.15);
    --accent: #A6FF84;
    --accent-hover: #b8ff9c;
    
    --font-sans: 'Open Sans', sans-serif;
    --font-mono: 'Fira Code', monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Layout Grid */
.app-layout {
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--card-border);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
    padding: 2rem 1.5rem 1rem;
    border-bottom: 1px solid var(--card-border);
}

.sidebar-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-brand span {
    color: var(--text-primary);
}

/* Sidebar Search */
.sidebar-search {
    padding: 1rem 1.5rem;
    position: relative;
    border-bottom: 1px solid var(--card-border);
}

.sidebar-search input {
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: 0.5rem;
    background: rgba(11, 19, 7, 0.6);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s ease;
}

.sidebar-search input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(158, 243, 185, 0.2);
}

/* Sidebar Nav Tree */
.sidebar-nav {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem 1rem;
}

.nav-group-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--secondary);
    letter-spacing: 0.08em;
    margin: 1.5rem 0.5rem 0.5rem;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin-bottom: 0.25rem;
}

.nav-link {
    display: block;
    padding: 0.55rem 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 0.35rem;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(158, 243, 185, 0.05);
}

.nav-link.active {
    color: var(--bg-color);
    background: var(--primary);
    font-weight: 600;
}

/* Collapsible Submenu Styles */
.nav-item-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.nav-item-container .nav-link {
    flex-grow: 1;
}

.submenu-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.55rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, transform 0.2s;
    border-radius: 0.35rem;
}

.submenu-toggle-btn:hover {
    color: var(--primary);
    background: rgba(158, 243, 185, 0.05);
}

.arrow-icon {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

.submenu-toggle-btn.collapsed .arrow-icon {
    transform: rotate(-90deg);
}

.nav-submenu-list {
    list-style: none;
    padding-left: 1rem;
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-submenu-list.collapsed {
    max-height: 0;
}


/* Content Area */
.content-wrapper {
    margin-left: 320px;
    flex-grow: 1;
    min-height: 100vh;
    padding: 4rem 5rem;
    display: flex;
    justify-content: center;
    background-color: var(--bg-color);
}

.content-container, .container {
    max-width: 850px;
    width: 100%;
    margin: 0 auto;
}

.sidebar-toggle-btn {
    display: none; /* Hidden on desktop */
}

/* Content styling overrides */
.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.page-header {
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1.5rem;
}

.breadcrumb {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Word cards, glosarium cards, error cards */
.word-card, .term-card, .error-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1.25rem;
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    backdrop-filter: blur(10px);
}

.word-title, .term-title, .error-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(158, 243, 185, 0.1);
    padding-bottom: 0.75rem;
}

.error-title {
    color: #ef4444 !important;
}

.word-section, .error-section {
    margin-bottom: 1.5rem;
}

.word-section h4, .error-section h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--secondary);
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.word-section p, .word-section ul, .word-section ol,
.error-section p, .error-section ul, .error-section ol {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Code block formatting with Fira Code */
pre[class*="language-"] {
    background: rgba(11, 19, 7, 0.8) !important;
    border-radius: 0.5rem !important;
    border-left: 3px solid var(--primary) !important;
    font-family: var(--font-mono) !important;
    font-size: 0.9rem !important;
    padding: 1.25rem !important;
    white-space: pre-wrap !important;
    word-wrap: break-word !important;
    overflow-x: auto !important;
}

code[class*="language-"] {
    font-family: var(--font-mono) !important;
    text-shadow: none !important;
    white-space: pre-wrap !important;
    word-wrap: break-word !important;
}

/* Trinket Drawer Panel */
.trinket-drawer {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 500px;
    background: var(--bg-color);
    border-left: 1px solid var(--card-border);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.trinket-drawer.open {
    transform: translateX(0);
}

.trinket-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.trinket-title {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

.close-drawer-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.25rem;
    transition: color 0.2s;
}

.close-drawer-btn:hover {
    color: var(--primary);
}

.trinket-body {
    flex-grow: 1;
    padding: 1rem;
}

.trinket-body iframe {
    width: 100%;
    height: 100%;
    border-radius: 0.5rem;
    border: 1px solid var(--card-border);
}

/* Floating Trinket Tab */
.trinket-tab {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%) rotate(-90deg) translate(50%, 100%);
    transform-origin: bottom right;
    background: var(--primary-dark);
    border: 1px solid var(--primary);
    border-bottom: none;
    color: var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem 0.5rem 0 0;
    font-weight: 700;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 -4px 15px rgba(158, 243, 185, 0.2);
    transition: all 0.2s ease;
    white-space: nowrap;
}

.trinket-tab:hover {
    background: var(--primary);
    color: var(--bg-color);
}

/* Search results in sidebar dropdown */
.sidebar-search-results {
    position: absolute;
    top: 100%;
    left: 1.5rem;
    right: 1.5rem;
    background: var(--bg-color);
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    max-height: 350px;
    overflow-y: auto;
    z-index: 200;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    display: none;
}

.search-result-item {
    display: block;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(158, 243, 185, 0.05);
    text-decoration: none;
    color: var(--text-primary);
    transition: background 0.2s;
}

.search-result-item:hover {
    background: rgba(158, 243, 185, 0.05);
}

.search-title {
    font-weight: 600;
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 0.15rem;
}

.search-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.search-no-result {
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Loading & error indicators */
.loading {
    text-align: center;
    padding: 3rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.error-load {
    color: #ff6b6b;
    padding: 2rem;
    border: 1px solid rgba(255, 107, 107, 0.2);
    border-radius: 0.5rem;
    background: rgba(255, 107, 107, 0.05);
}

/* Highlight Target for search jump */
.highlight-target {
    animation: highlightCard 2.5s ease-out;
}

@keyframes highlightCard {
    0% { box-shadow: 0 0 0 4px var(--primary), 0 0 30px rgba(158, 243, 185, 0.4); transform: scale(1.02); }
    10% { box-shadow: 0 0 0 4px var(--primary), 0 0 30px rgba(158, 243, 185, 0.6); transform: scale(1.02); }
    100% { box-shadow: 0 0 0 0px transparent, 0 0 0px transparent; transform: scale(1); }
}

/* Intro cards style inside Home */
.intro-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.intro-sections .card {
    padding: 1.5rem;
    border-radius: 1rem;
}

.intro-sections h3 {
    color: var(--primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

/* Navigation button styling inside contents */
.chapter-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    margin-bottom: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--primary-dark);
    color: var(--primary);
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all 0.2s ease;
    border: 1px solid var(--primary);
}

.nav-btn:hover {
    background: var(--primary);
    color: var(--bg-color);
    transform: translateY(-2px);
}

.nav-btn.next-btn {
    margin-left: auto;
}

/* Scroll to top button */
#scrollTopBtn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    background: var(--primary);
    color: var(--bg-color);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(158, 243, 185, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: 9999;
}

#scrollTopBtn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#scrollTopBtn:hover {
    background: var(--secondary);
    transform: translateY(-3px) scale(1.05);
}

/* Landing Page Hero Header */
.home-hero {
    text-align: center;
    padding: 4rem 1rem 3rem;
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 3rem;
}

.home-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.home-hero h1 span {
    color: var(--primary);
}

.home-hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto;
}

/* Hidden elements in SPA mode */
.back-link, footer {
    display: none !important;
}

/* Scrollbar customization */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-dark);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Tiruan Konsol Terminal untuk Output Error */
.terminal-box {
    background-color: #0c0c0c !important;
    border: 1px solid #333 !important;
    border-radius: 0.5rem !important;
    font-family: var(--font-mono) !important;
    margin-top: 0.75rem;
    overflow: hidden;
    max-width: 100% !important;
}

.terminal-header {
    background-color: #1e1e1e !important;
    color: #cccccc !important;
    padding: 0.5rem 1rem !important;
    font-size: 0.8rem !important;
    font-weight: 600 !important;
    border-bottom: 1px solid #2d2d2d !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.terminal-body {
    padding: 1rem !important;
    color: #f3f4f6 !important;
    font-size: 0.85rem !important;
    line-height: 1.5 !important;
    white-space: pre-wrap !important;
    word-wrap: break-word !important;
    overflow-x: auto !important;
}

/* Sidebar Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 95;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.app-layout.sidebar-active-mobile .sidebar-overlay {
    opacity: 1;
    pointer-events: auto;
}

/* Mobile & Tablet Breakpoint */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    
    .content-wrapper {
        margin-left: 0;
        padding: 4rem 1rem 2rem;
        display: block !important;
        min-width: 0 !important;
    }
    
    .app-layout.sidebar-active-mobile .sidebar {
        transform: translateX(0);
    }
    
    .sidebar-toggle-btn {
        display: flex;
        position: fixed;
        top: 1rem;
        left: 1rem;
        z-index: 99;
        background-color: rgba(0, 0, 0, 0.7);
        border: 1px solid var(--card-border);
        color: var(--text-primary);
        cursor: pointer;
        align-items: center;
        justify-content: center;
        padding: 0.6rem;
        border-radius: 50%;
        backdrop-filter: blur(8px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
        transition: background-color 0.2s, color 0.2s;
    }
    
    .sidebar-toggle-btn:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--primary);
    }
    
    .sidebar-toggle-btn svg {
        width: 20px;
        height: 20px;
    }
    
    body {
        font-size: 0.875rem;
    }

    .content-container, .container {
        padding: 2rem 0;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        box-sizing: border-box !important;
    }
    
    .card, .word-card, .term-card, .error-card {
        padding: 1rem !important;
        border-radius: 0.75rem;
    }
    
    .card ol, .card ul {
        margin-left: 0 !important;
        padding-left: 1.25rem !important;
    }
    
    .word-title, .term-title, .error-title {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }
    
    .page-title {
        font-size: 1.6rem !important;
    }
    
    h2 {
        font-size: 1.35rem !important;
    }
    
    h3 {
        font-size: 1.15rem !important;
    }
    
    .word-section h4, .error-section h4 {
        font-size: 0.75rem;
    }
    
    .home-hero h1 {
        font-size: 1.8rem;
    }
    
    .home-hero p {
        font-size: 0.9rem;
    }
    
    pre[class*="language-"] {
        padding: 0.85rem !important;
        font-size: 0.8rem !important;
    }
}