/* =================================================================
   1. Konfigurasi Dasar & Variabel CSS
   ================================================================= */
:root {
    /* Palet Warna Terang */
    --bg-light: #f8f9fa;
    --card-bg-light: #ffffff;
    --text-light: #212529;
    --text-muted-light: #6c757d;
    --border-light: #dee2e6;
    --accent-light: #f0e6ff; /* Ungu sangat pucat */
    --accent-text-light: #5b21b6; /* Ungu gelap */

    /* Palet Warna Gelap */
    --bg-dark: #121212; /* Hitam lebih pekat */
    --card-bg-dark: #1e1e1e;
    --text-dark: #e9ecef;
    --text-muted-dark: #adb5bd;
    --border-dark: #343a40;
    --accent-dark: #FFD900;
    --accent-text-dark: #181818;

    /* Warna Universal */
    --saweria-yellow: #FFD900;
    --trakteer-red: #dc3545;
    --font-family: 'Poppins', sans-serif;
    --primary-action-color: #5b21b6;
    --primary-action-color-dark: #FFD900;

    /* Konfigurasi Lainnya */
    --sidebar-width: 16rem; /* 256px */
    --transition-speed: 0.3s;
}

/* --- Reset Universal & Pengaturan Font --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-light);
    color: var(--text-light);
    opacity: 0;
    transition: background-color 0.4s ease, color 0.4s ease, opacity 0.5s ease;
}

body.loaded {
    opacity: 1;
}

body.dark {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

/* =================================================================
   2. Struktur Layout (Sidebar, Konten, Navigasi Mobile)
   ================================================================= */

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--sidebar-width);
    background-color: var(--card-bg-light);
    border-right: 1px solid var(--border-light);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease-in-out, background-color 0.4s ease, border-color 0.4s ease;
}

.sidebar.open {
    transform: translateX(0);
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

body.dark .sidebar {
    background-color: var(--card-bg-dark);
    border-color: var(--border-dark);
}

/* --- Konten Utama --- */
.main-content {
    transition: margin-left var(--transition-speed) ease-in-out;
}

/* --- Navigasi Mobile --- */
.nav-toggle-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 99;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
    padding: 0.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-light);
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-light);
}

body.dark .nav-toggle-btn {
    background-color: rgba(30, 30, 30, 0.8);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 98;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.nav-overlay.show {
    display: block;
    opacity: 1;
}

/* =================================================================
   3. Styling Elemen di Sidebar
   ================================================================= */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
}
body.dark .sidebar-header { border-color: var(--border-dark); }

.sidebar-title { font-size: 1.25rem; font-weight: 700; }

.nav-close-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted-light);
    font-size: 1.25rem;
}
body.dark .nav-close-btn { color: var(--text-muted-dark); }

.sidebar-nav {
    flex-grow: 1;
    padding: 0.5rem;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--text-light);
    transition: background-color 0.2s, color 0.2s, transform 0.2s;
}
body.dark .nav-link { color: var(--text-muted-dark); }

.nav-link:hover {
    background-color: #f1f3f5;
    transform: translateX(5px);
}
body.dark .nav-link:hover {
    background-color: #2a2a2a;
    color: var(--text-dark);
}

.nav-link.active {
    background-color: var(--accent-light);
    color: var(--accent-text-light);
    font-weight: 600;
}
body.dark .nav-link.active {
    background-color: var(--accent-dark);
    color: var(--accent-text-dark);
}

.nav-icon { width: 1.25rem; text-align: center; }

.sidebar-footer {
    padding: 0.5rem;
    border-top: 1px solid var(--border-light);
}
body.dark .sidebar-footer { border-color: var(--border-dark); }

.theme-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: #e9ecef;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    color: var(--text-light);
    font-weight: 500;
}
body.dark .theme-toggle-btn {
    background-color: #2a2a2a;
    color: var(--text-dark);
}

.theme-toggle-btn .fa-sun { display: none; }
body.dark .theme-toggle-btn .fa-moon { display: none; }
body.dark .theme-toggle-btn .fa-sun { display: inline-block; }

/* =================================================================
   4. Styling Konten Utama Halaman
   ================================================================= */
.page-container {
    max-width: 64rem;
    margin: auto;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards;
}

.header-icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem auto;
    background-color: var(--accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
body.dark .header-icon-wrapper { background-color: rgba(255, 217, 0, 0.1); }

.header-icon {
    font-size: 2.5rem;
    color: var(--accent-text-light);
}
body.dark .header-icon { color: var(--accent-dark); }

.page-title { font-size: 2.5rem; font-weight: 700; }

.page-subtitle {
    color: var(--text-muted-light);
    margin-top: 1rem;
    font-size: 1.125rem;
    line-height: 1.8;
}
body.dark .page-subtitle { color: var(--text-muted-dark); }

.card {
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    border: 1px solid var(--border-light);
    margin-bottom: 2rem;
    background-color: var(--card-bg-light);
    transition: background-color 0.4s ease, border-color 0.4s ease;
}
body.dark .card {
    background-color: var(--card-bg-dark);
    border-color: var(--border-dark);
}

/* =================================================================
   5. Styling Web Tools & FAQ
   ================================================================= */
.tools-section, .faq-card {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards;
}
.faq-card {
    animation-delay: 0.2s;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    display: flex;
    flex-direction: column;
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-icon {
    font-size: 1.5rem;
    color: var(--primary-action-color);
    width: 2rem;
    text-align: center;
}
body.dark .tool-icon {
    color: var(--primary-action-color-dark);
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.tool-description {
    color: var(--text-muted-light);
    font-size: 0.9rem;
    line-height: 1.6;
    flex-grow: 1; /* Membuat deskripsi mengisi ruang tersedia */
    margin-bottom: 1.5rem;
}
body.dark .tool-description {
    color: var(--text-muted-dark);
}

.tool-actions {
    margin-top: auto; /* Mendorong tombol ke bagian bawah kartu */
}

/* Style umum untuk tombol Live Preview */
.tool-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem;
    border-radius: 0.5rem;
    border: none;
    background-color: var(--primary-action-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s, transform 0.2s, filter 0.2s;
    font-size: 1rem;
    width: 100%;
}
.tool-button:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}
.tool-button:active {
    transform: translateY(0);
    filter: brightness(1);
}
.tool-button .fas, .tool-button .fab {
    margin-right: 0.75rem;
}

/* Style khusus untuk tombol berwarna */
.tool-button.btn-red {
    background-color: var(--trakteer-red);
    color: white;
}
.tool-button.btn-yellow {
    background-color: var(--saweria-yellow);
    color: var(--accent-text-dark);
}

/* --- Style untuk FAQ --- */
.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 1.5rem;
}
.faq-item {
    border-bottom: 1px solid var(--border-light);
}
.faq-item:last-child {
    border-bottom: none;
}
body.dark .faq-item { border-color: var(--border-dark); }

.faq-question {
    width: 100%;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0.5rem;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-light);
}
body.dark .faq-question { color: var(--text-dark); }

.faq-icon {
    transition: transform 0.3s;
}
.faq-question.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}
.faq-answer p {
    padding: 0 0.5rem 1.25rem 0.5rem;
    color: var(--text-muted-light);
    line-height: 1.7;
}
body.dark .faq-answer p { color: var(--text-muted-dark); }

/* =================================================================
   6. Footer dan Animasi
   ================================================================= */
.page-footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-muted-light);
}
body.dark .page-footer { color: var(--text-muted-dark); }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =================================================================
   7. Media Queries untuk Desain Responsif
   ================================================================= */
@media (min-width: 768px) {
    .sidebar {
        transform: translateX(0);
    }
    .main-content {
        margin-left: var(--sidebar-width);
        padding: 2rem;
    }
    .nav-toggle-btn, .nav-close-btn {
        display: none;
    }
}

@media (max-width: 767px) {
    .nav-toggle-btn, .nav-close-btn {
        display: block;
    }
    .main-content {
        padding: 1rem;
    }
    .page-title {
        font-size: 2rem;
    }
    .page-container {
        max-width: 100%;
    }
    .tools-grid {
        grid-template-columns: 1fr;
    }
}