/* --- 1. Import Font & Variabel Global Neo-Brutalism --- */
:root {
    /* Palette Warna Neo-Brutalism */
    --bg-color: #f0f0f0;         /* Abu-abu sangat muda untuk background */
    --card-bg: #ffffff;          /* Putih untuk kartu */
    --border-color: #000000;     /* Hitam pekat untuk border */
    
    --primary-color: #FFEB3B;    /* Kuning Terang (Main Action) */
    --secondary-color: #FF90E8;  /* Pink Neon (Accent) */
    --accent-color: #23A6D5;     /* Cyan (Accent 2) */
    --success-color: #00E676;    /* Hijau Neon */
    --danger-color: #FF5252;     /* Merah Terang */
    
    --text-main: #000000;
    --text-muted: #444444;

    /* Dimensi Brutal */
    --border-width: 3px;
    --shadow-offset: 5px;
    --radius: 0px;               /* Sudut tajam (bisa diubah ke 4px-8px jika ingin sedikit lengkung) */
    
    --navbar-height: 80px;
    --transition-speed: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* --- 2. Reset & Setup Global --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(#000 1px, transparent 1px); /* Pola titik-titik halus */
    background-size: 20px 20px;
    color: var(--text-main);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-main);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
}

/* --- 3. Navbar Neo-Brutal --- */
.navbar {
    width: 100%;
    height: var(--navbar-height);
    background-color: var(--card-bg);
    border-bottom: var(--border-width) solid var(--border-color);
    padding: 0 30px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.navbar-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.navbar-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
    background-color: var(--primary-color);
    padding: 5px 15px;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
    transition: transform 0.1s;
}

.navbar-brand:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--border-color);
}

.navbar-nav {
    list-style-type: none;
    display: flex;
    gap: 20px;
}

.navbar-nav li a {
    font-family: 'Space Grotesk', sans-serif;
    padding: 8px 16px;
    border: var(--border-width) solid transparent; /* Invisible border untuk layout */
    transition: all var(--transition-speed);
    font-size: 1.1rem;
}

.navbar-nav li a:hover {
    background-color: var(--secondary-color);
    border: var(--border-width) solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
    transform: translate(-2px, -2px);
}

/* --- 4. Layout Konten --- */
.content-wrapper {
    margin-top: var(--navbar-height);
    padding: 40px 20px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.page-header {
    margin-bottom: 30px;
    background-color: var(--accent-color);
    border: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--border-color);
    padding: 20px;
    display: inline-block;
}

.page-header h1 {
    margin: 0;
    font-size: 2.5rem;
    color: #fff;
    text-shadow: 2px 2px 0px var(--border-color);
}

/* --- 5. Komponen Card (Kotak) --- */
.card {
    background: var(--card-bg);
    border: var(--border-width) solid var(--border-color);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--border-color);
    transition: transform var(--transition-speed);
}

.card:hover {
    /* Efek hover halus */
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0px var(--border-color);
}

.card h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    border-bottom: var(--border-width) solid var(--border-color);
    padding-bottom: 10px;
    display: inline-block;
    background-color: var(--primary-color);
    padding: 5px 15px;
}

/* --- 6. Form & Input --- */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
}

.form-control, .form-control-file {
    width: 100%;
    padding: 15px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    border: var(--border-width) solid var(--border-color);
    background-color: #fff;
    border-radius: 0; /* Kotak tajam */
    box-shadow: 4px 4px 0px rgba(0,0,0,0.1);
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    box-shadow: 6px 6px 0px var(--border-color);
    background-color: #fffef0;
    transform: translate(-2px, -2px);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Kustomisasi Input File Button */
.form-control-file::file-selector-button {
    padding: 8px 15px;
    margin-right: 15px;
    border: var(--border-width) solid var(--border-color);
    background-color: var(--secondary-color);
    color: var(--text-main);
    font-weight: 700;
    cursor: pointer;
    box-shadow: 2px 2px 0px var(--border-color);
    transition: all 0.1s;
}

.form-control-file::file-selector-button:hover {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0px var(--border-color);
}

/* --- 7. Tombol (Buttons) --- */
.btn {
    padding: 12px 30px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    text-transform: uppercase;
    border: var(--border-width) solid var(--border-color);
    cursor: pointer;
    display: inline-block;
    text-align: center;
    box-shadow: 5px 5px 0px var(--border-color);
    transition: all 0.1s;
    position: relative;
}

.btn:active {
    transform: translate(4px, 4px);
    box-shadow: 1px 1px 0px var(--border-color);
}

.btn-primary {
    background-color: var(--primary-color); /* Kuning */
    color: var(--text-main);
}

.btn-primary:hover {
    background-color: #ffe600;
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0px var(--border-color);
}

.btn-success {
    background-color: var(--success-color); /* Hijau */
    color: var(--text-main);
}

.btn-success:hover {
    background-color: #00c853;
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0px var(--border-color);
}

/* --- 8. Alerts / Flash Messages --- */
.alert {
    padding: 20px;
    margin-bottom: 30px;
    border: var(--border-width) solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    box-shadow: 5px 5px 0px var(--border-color);
}

.alert-danger {
    background-color: var(--danger-color);
    color: #fff;
}

.alert-success {
    background-color: var(--success-color);
    color: #000;
}

.alert-close {
    background: none;
    border: 2px solid currentColor;
    width: 30px;
    height: 30px;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.alert-close:hover {
    background-color: rgba(0,0,0,0.1);
}

/* --- 9. Visualisasi & Hasil --- */
.result-block {
    padding: 20px;
    background-color: #fff;
    border: var(--border-width) solid var(--border-color);
    margin-top: 2rem;
    box-shadow: 4px 4px 0px var(--border-color);
    background-image: linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0), linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
}

.result-block h3 {
    background-color: #fff;
    border: var(--border-width) solid var(--border-color);
    padding: 10px;
    display: inline-block;
    margin: 0;
    font-size: 2rem;
}

.charts-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.chart-box {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 5px 5px 0px var(--border-color);
    text-align: center;
    background: #fff;
}

.chart-box h3 {
    background-color: var(--accent-color);
    color: #fff;
    display: inline-block;
    padding: 5px 10px;
    border: 2px solid var(--border-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.table-responsive {
    max-height: 500px;
    overflow-y: auto;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 5px 5px 0px var(--border-color);
}

/* Table Styling */
.table {
    width: 100%;
    border-collapse: collapse;
}
.table th, .table td {
    border: 2px solid var(--border-color);
    padding: 12px;
    text-align: left;
}
.table th {
    background-color: var(--primary-color);
    font-family: 'Space Grotesk', sans-serif;
    text-transform: uppercase;
}
.table-striped tbody tr:nth-of-type(odd) {
    background-color: #f9f9f9;
}

/* --- 10. Spinner --- */
.spinner-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.spinner-container {
    text-align: center;
    background: var(--primary-color);
    padding: 40px;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 10px 10px 0px var(--border-color);
}

.spinner-container p {
    margin-top: 20px;
    font-weight: 800;
    font-family: 'Space Grotesk', sans-serif;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 8px solid #fff;
    border-left-color: var(--border-color);
    border-bottom-color: var(--border-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

.hidden { display: none !important; }

/* --- 11. Responsive Mobile --- */
.hamburger-btn {
    display: none;
    background: var(--secondary-color);
    border: var(--border-width) solid var(--border-color);
    color: var(--text-main);
    font-size: 1.5rem;
    padding: 5px 10px;
    box-shadow: 3px 3px 0px var(--border-color);
    cursor: pointer;
}

.hamburger-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--border-color);
}

@media (max-width: 768px) {
    .hamburger-btn { display: block; }
    
    .navbar-container { padding: 0 20px; }
    
    .navbar-nav-container {
        position: absolute;
        top: var(--navbar-height);
        left: 0;
        width: 100%;
        background-color: var(--card-bg);
        border-bottom: var(--border-width) solid var(--border-color);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }

    .navbar-nav-container.active {
        max-height: 300px;
        border-top: var(--border-width) solid var(--border-color);
    }

    .navbar-nav {
        flex-direction: column;
        padding: 20px;
        gap: 10px;
    }

    .navbar-nav li a {
        display: block;
        border: 2px solid var(--border-color);
        text-align: center;
        background-color: #f9f9f9;
    }
    
    .page-header h1 { font-size: 1.8rem; }
    
    .charts-grid { flex-direction: column; }
}