@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --bg-main: hsl(25, 10%, 7%);
    --bg-card: hsl(25, 10%, 12%);
    --bg-card-hover: hsl(25, 10%, 15%);
    --border-color: hsl(25, 8%, 20%);
    --text-primary: hsl(25, 10%, 95%);
    --text-secondary: hsl(25, 8%, 65%);
    --text-muted: hsl(25, 6%, 45%);
    
    --bg-search: rgba(30, 26, 22, 0.8);
    --bg-muted-box: rgba(0, 0, 0, 0.25);
    
    --accent: hsl(25, 100%, 60%);
    --accent-glow: hsla(25, 100%, 60%, 0.15);
    
    --kategori: hsl(200, 100%, 60%);
    --gol-pokok: hsl(35, 100%, 55%);
    --golongan: hsl(15, 100%, 60%);
    --subgolongan: hsl(30, 100%, 60%);
    --kelompok: hsl(140, 80%, 55%);
    
    --font-head: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

body.light-theme {
    --bg-main: hsl(25, 20%, 97%);
    --bg-card: hsl(0, 0%, 100%);
    --bg-card-hover: hsl(25, 20%, 93%);
    --border-color: hsl(25, 15%, 85%);
    --text-primary: hsl(25, 25%, 15%);
    --text-secondary: hsl(25, 15%, 40%);
    --text-muted: hsl(25, 10%, 60%);
    
    --bg-search: rgba(255, 255, 255, 0.85);
    --bg-muted-box: rgba(0, 0, 0, 0.04);
    
    --accent: hsl(25, 95%, 50%);
    --accent-glow: hsla(25, 95%, 50%, 0.1);
    
    --kategori: hsl(200, 95%, 35%);
    --gol-pokok: hsl(35, 90%, 40%);
    --golongan: hsl(15, 95%, 45%);
    --subgolongan: hsl(30, 95%, 40%);
    --kelompok: hsl(140, 80%, 32%);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    padding-bottom: 3rem;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
    padding-top: 1rem;
}

header h1 {
    font-family: var(--font-head);
    font-size: 2.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, hsl(25, 100%, 60%), hsl(40, 100%, 55%));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

body.light-theme header h1 {
    background: linear-gradient(135deg, hsl(25, 95%, 50%), hsl(40, 95%, 45%));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color 0.4s ease;
}

header a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dashed var(--accent);
    transition: opacity 0.2s;
}

header a:hover {
    opacity: 0.8;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    cursor: pointer;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    box-shadow: var(--shadow);
    transition: background-color 0.3s, border-color 0.3s, color 0.3s, transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    outline: none;
}

.theme-toggle-btn:hover {
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    transform: scale(1.1) rotate(15deg);
    border-color: var(--text-secondary);
}

.theme-toggle-btn .sun-icon {
    display: none;
}

.theme-toggle-btn .moon-icon {
    display: block;
}

body.light-theme .theme-toggle-btn .sun-icon {
    display: block;
}

body.light-theme .theme-toggle-btn .moon-icon {
    display: none;
}

body.light-theme .theme-toggle-btn {
    transform: rotate(180deg);
}

body.light-theme .theme-toggle-btn:hover {
    transform: rotate(195deg) scale(1.1);
}

/* Search Box wrapper */
.search-wrapper {
    position: sticky;
    top: 1rem;
    z-index: 100;
    margin-bottom: 1.5rem;
}

.search-container {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.25rem;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    transition: border-color 0.3s, box-shadow 0.3s, background-color 0.4s ease;
}

.search-container:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.search-icon {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    color: var(--text-muted);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    padding: 0.75rem 0.5rem;
    font-family: var(--font-body);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.clear-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0 1rem;
    cursor: pointer;
    display: none;
    align-items: center;
}

.clear-btn:hover {
    color: var(--text-primary);
}

/* Loading Indicator */
.loading-indicator {
    text-align: center;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Tabs */
.tabs-container {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
    scrollbar-width: none;
}

.tabs-container::-webkit-scrollbar {
    display: none;
}

.tab {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

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

.tab.active {
    background: var(--accent);
    color: hsl(25, 100%, 5%);
    border-color: var(--accent);
}

/* Results Stats */
.results-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.4s ease;
}

/* Explorer Breadcrumb */
.explorer-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    background: var(--bg-muted-box);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 500;
    transition: background-color 0.4s ease, border-color 0.4s ease;
}

.explorer-breadcrumb-item {
    color: var(--accent);
    cursor: pointer;
    transition: opacity 0.2s, color 0.4s ease, border-color 0.2s;
    text-decoration: none;
    border-bottom: 1px dashed var(--accent);
}

.explorer-breadcrumb-item:hover {
    opacity: 0.8;
    border-bottom-style: solid;
}

.explorer-breadcrumb-current {
    color: var(--text-primary);
    font-weight: 600;
    transition: color 0.4s ease;
}

.explorer-breadcrumb-separator {
    color: var(--text-muted);
}

/* Cards */
.results-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    transition: transform 0.2s, border-color 0.4s ease, background-color 0.4s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.card.explorer-clickable {
    cursor: pointer;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: hsl(25, 15%, 28%);
}

body.light-theme .card:hover {
    border-color: hsl(25, 15%, 75%);
}

.card.explorer-clickable:hover {
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.card-header-left {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-block;
}

.badge.kategori { background-color: rgba(0, 150, 255, 0.15); color: var(--kategori); }
.badge.golongan-pokok { background-color: rgba(230, 160, 0, 0.15); color: var(--gol-pokok); }
.badge.golongan { background-color: rgba(240, 80, 0, 0.15); color: var(--golongan); }
.badge.subgolongan { background-color: rgba(255, 120, 0, 0.15); color: var(--subgolongan); }
.badge.kelompok { background-color: rgba(0, 200, 80, 0.15); color: var(--kelompok); }

.code-title {
    font-family: var(--font-head);
    font-size: 1.15rem;
    font-weight: 700;
    flex: 1;
    min-width: 0; /* allow flex item to shrink so long titles wrap */
    color: var(--text-primary);
    padding-right: 4.5rem; /* Space for copy buttons */
    transition: color 0.4s ease;
}

.code-num {
    color: var(--accent);
    margin-right: 0.5rem;
    transition: color 0.4s ease;
}

/* Description & Toggle Collapse */
.desc-wrapper {
    position: relative;
    margin-bottom: 1rem;
}

.description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    word-break: break-word;
    max-height: 300rem;
    transition: max-height 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), color 0.4s ease;
    text-align: justify;
    text-indent: 2rem;
    overflow: hidden;
}

.description.has-list {
    text-indent: 0;
}

.description.collapsed {
    max-height: 4.5rem; /* Sekitar 3 baris teks */
    position: relative;
}

.description.collapsed::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1.8rem;
    background: linear-gradient(transparent, var(--bg-card));
    pointer-events: none;
    transition: background 0.4s ease;
}

.card:hover .description.collapsed::after {
    background: linear-gradient(transparent, var(--bg-card-hover));
}

.toggle-desc-btn {
    background: transparent;
    border: none;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.25rem 0;
    margin-top: 0.35rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: opacity 0.2s;
    outline: none;
}

.toggle-desc-btn:hover {
    opacity: 0.8;
}

.highlight {
    background: hsla(50, 100%, 50%, 0.25);
    color: hsl(50, 100%, 80%);
    padding: 0 0.1rem;
    border-radius: 2px;
}

body.light-theme .highlight {
    background: hsla(50, 100%, 50%, 0.35);
    color: hsl(50, 100%, 20%);
}

/* Breadcrumb Path */
.path-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-muted-box);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    transition: background-color 0.4s ease;
}

.path-step {
    cursor: pointer;
    transition: color 0.2s;
}

.path-step:hover {
    color: var(--text-secondary);
}

.path-separator {
    color: var(--text-muted);
}

/* Header Clickable for Explorer Drilldown */
.card-clickable-header {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
    width: 100%;
    margin-bottom: 0.75rem;
    transition: color 0.2s ease;
}

.card-clickable-header.drilldown-trigger:hover .code-title {
    color: var(--accent);
}

/* Card Chevron for Drilldown */
.chevron-container {
    display: flex;
    align-items: center;
    color: var(--text-muted);
    transition: transform 0.2s, color 0.2s;
    margin-left: auto;
}

.card-clickable-header.drilldown-trigger:hover .chevron-container {
    color: var(--accent);
    transform: translateX(3px);
}

/* Actions */
.actions {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.action-btn {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

body.light-theme .action-btn {
    background: rgba(0, 0, 0, 0.03);
}

.action-btn:hover {
    background: var(--accent);
    color: hsl(25, 100%, 5%);
    border-color: var(--accent);
}

/* Sub-items list inside card */
.sub-items-container {
    margin-top: 1rem;
    border-top: 1px dashed var(--border-color);
    padding-top: 0.75rem;
}

.sub-items-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.07em;
    margin-bottom: 0.5rem;
}

.sub-items-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.sub-item-row {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.35rem 0.5rem; /* Sedikit diperlebar agar lebih mudah di-tap di HP */
    border-radius: 6px;
    transition: background-color 0.2s, color 0.2s;
}

.sub-item-row:nth-child(even) {
    background-color: var(--bg-muted-box);
}

.sub-item-row:hover {
    background-color: rgba(255, 255, 255, 0.07);
    color: var(--accent);
}

body.light-theme .sub-item-row:hover {
    background-color: rgba(0, 0, 0, 0.07);
}

.sub-item-code {
    font-family: var(--font-head);
    font-weight: 700;
    color: var(--accent);
    flex-shrink: 0;
}

.sub-item-title {
    white-space: normal;
    word-break: break-word;
    line-height: 1.4;
}

/* Load More Button */
.load-more-container {
    text-align: center;
    margin-top: 1.5rem;
}

.load-more-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 2rem;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.load-more-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state svg {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

/* Copy Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--accent);
    color: hsl(25, 100%, 5%);
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Layout & Quick Nav Sidebar */
.app-layout {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 1.5rem;
    align-items: start;
    position: relative;
}

.app-layout.no-sidebar {
    grid-template-columns: 1fr;
}

.main-content {
    min-width: 0;
}

.quick-nav {
    position: sticky;
    top: 5.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    max-height: calc(100vh - 7rem);
    overflow-y: auto;
    padding: 0.5rem;
    background: var(--bg-muted-box);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: blur(8px);
    transition: background-color 0.4s ease, border-color 0.4s ease;
    scrollbar-width: none;
}

.quick-nav::-webkit-scrollbar {
    display: none;
}

.quick-nav-item {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.4rem 0.25rem; /* Dikurangi agar fit di lebar 70px */
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-head);
    cursor: pointer;
    text-align: center; /* Ubah ke tengah agar presisi */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all 0.2s ease;
}

.quick-nav-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.quick-nav-item.active {
    background: var(--accent);
    color: hsl(25, 100%, 5%);
    border-color: var(--accent);
}

@media (max-width: 800px) {
    .app-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .quick-nav {
        position: sticky;
        top: 5.25rem;
        z-index: 90;
        flex-direction: row;
        max-height: none;
        overflow-x: auto;
        overflow-y: hidden;
        width: 100%;
        border-radius: 12px;
        gap: 0.4rem;
        padding: 0.4rem;
        margin-bottom: 0.25rem;
    }
    .quick-nav-item {
        text-align: center;
        padding: 0.35rem 0.75rem;
        flex-shrink: 0; /* Cegah penyusutan/overlap di layar HP */
    }
}

/* Responsive adjust for mobile */
@media (max-width: 600px) {
    header h1 {
        font-size: 2.25rem;
    }
    
    .container {
        padding: 1rem 0.5rem;
    }
    
    .search-input {
        font-size: 1rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .code-title {
        padding-right: 0;
        font-size: 1.1rem;
    }

    .card-header {
        margin-bottom: 0.5rem;
    }

    .actions {
        position: static;
        margin-top: 0.75rem;
        justify-content: flex-end;
    }
    
    .theme-toggle-btn {
        width: 38px;
        height: 38px;
    }
}

/* Animated Sub-items Collapsible */
.collapsed-sub-items {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    width: 100%;
    overflow: hidden;
}

.collapsed-sub-items.expanded {
    grid-template-rows: 1fr;
}

.collapsed-sub-items-inner {
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding-top: 0.35rem;
}