/* --- 1. Import Font & Variabel Global Playful Geometric --- */
:root {
    /* Palette Warna Playful Geometric */
    --bg-color: #FFFDF5;         /* Warm Cream (Paper feel) */
    --card-bg: #ffffff;          /* Putih untuk kartu */
    --border-color: #1E293B;     /* Slate 800 (Softer than black) */
    
    --accent-color: #8B5CF6;     /* Vivid Violet (Primary Action) */
    --secondary-color: #F472B6;  /* Hot Pink (Playful pop) */
    --tertiary-color: #FBBF24;   /* Amber/Yellow (Optimism) */
    --quaternary-color: #34D399; /* Emerald/Mint (Freshness) */
    --muted-color: #F1F5F9;      /* Slate 100 */
    --muted-foreground: #64748B; /* Slate 500 */
    
    --success-color: #34D399;    /* Hijau Mint */
    --danger-color: #FF5252;     /* Merah Terang */
    
    --text-main: #1E293B;        /* Slate 800 */
    --text-muted: #64748B;       /* Slate 500 */

    /* Dimensi & Radius Playful Geometric */
    --border-width: 2px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --shadow-offset: 4px;
    
    --navbar-height: 80px;
    --transition-speed: 0.3s;
    --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(rgba(30, 41, 59, 0.07) 1.5px, transparent 1.5px);
    background-size: 24px 24px;
    color: var(--text-main);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: 'Outfit', system-ui, sans-serif;
    color: var(--text-main);
    font-weight: 800;
    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: 'Outfit', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    color: #fff;
    background-color: var(--accent-color); /* Violet */
    padding: 5px 15px;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
    border-radius: var(--radius-sm);
    transition: all 0.3s var(--transition-bounce);
}

.navbar-brand:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
    color: #fff;
}

.navbar-nav-container {
    display: flex;
    align-items: center;
    gap: 30px;
}

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

.navbar-nav li a {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    padding: 8px 20px;
    border: var(--border-width) solid transparent; /* Invisible border untuk layout */
    border-radius: var(--radius-full);
    transition: all 0.3s var(--transition-bounce);
    font-size: 1rem;
    display: inline-block;
}

.navbar-nav li a:hover {
    background-color: var(--tertiary-color); /* Amber on hover */
    border-color: var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
    transform: translate(-2px, -2px);
}

.user-greeting {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    background-color: var(--secondary-color); /* Hot Pink */
    color: #fff;
    padding: 6px 16px;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.navbar-nav li a.logout-btn:hover {
    background-color: var(--danger-color);
    border-color: var(--border-color);
    color: #fff;
}

.navbar-nav li a.register-nav-btn {
    background-color: var(--quaternary-color); /* Emerald */
    border: var(--border-width) solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
    color: var(--text-main);
}

.navbar-nav li a.register-nav-btn:hover {
    background-color: var(--secondary-color); /* Hot Pink */
    color: #fff;
}

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

/* --- Hero Section & Custom Classes --- */
.hero-section {
    text-align: center;
    padding: 80px 20px;
    margin-bottom: 50px;
    background: #ffffff;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 8px 8px 0px #E2E8F0;
    position: relative;
    overflow: hidden;
}

.hero-deco-1 {
    position: absolute;
    top: -50px;
    left: -50px;
    width: 150px;
    height: 150px;
    background: var(--tertiary-color);
    border-radius: var(--radius-full);
    z-index: 1;
    opacity: 0.15;
    border: var(--border-width) solid var(--border-color);
}

.hero-deco-2 {
    position: absolute;
    bottom: -60px;
    right: -40px;
    width: 180px;
    height: 180px;
    background: var(--secondary-color);
    border-radius: var(--radius-full);
    z-index: 1;
    opacity: 0.15;
    border: var(--border-width) solid var(--border-color);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 25px;
    line-height: 1.1;
    font-weight: 800;
}

.hero-desc {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 40px auto;
    color: var(--text-muted);
    font-weight: 500;
}

.hero-btn {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 30px;
}

.card-header {
    background-color: var(--tertiary-color);
    border-bottom: var(--border-width) solid var(--border-color);
    padding: 15px;
    margin: -30px -30px 20px -30px;
    border-top-left-radius: 14px;
    border-top-right-radius: 14px;
}

.card-header h2 {
    margin: 0 !important;
    border: none !important;
    font-size: 1.5rem !important;
    padding: 0 !important;
    background: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
}

.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);
    border-radius: var(--radius-md);
    padding: 20px 30px;
    display: inline-block;
}

.page-header h1 {
    margin: 0;
    font-size: 2.2rem;
    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;
    border-radius: var(--radius-md);
    box-shadow: 8px 8px 0px #E2E8F0;
    transition: all 0.3s var(--transition-bounce);
}

.card:hover {
    transform: rotate(-0.5deg) scale(1.01);
    box-shadow: 10px 10px 0px #E2E8F0;
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: 3px 3px 0px var(--border-color);
    background-color: var(--tertiary-color);
    color: var(--text-main);
    display: inline-block;
    padding: 6px 16px;
    text-transform: uppercase;
}

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

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-main);
}

.form-control, .form-control-file {
    width: 100%;
    padding: 15px;
    font-size: 1rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    border: var(--border-width) solid #CBD5E1;
    background-color: #fff;
    border-radius: var(--radius-sm);
    box-shadow: 4px 4px 0px transparent;
    transition: all 0.2s ease;
    color: var(--text-main);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 4px 4px 0px var(--accent-color);
}

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

/* Kustomisasi Input File Button */
.form-control-file::file-selector-button {
    padding: 8px 20px;
    margin-right: 15px;
    border: var(--border-width) solid var(--border-color);
    background-color: var(--tertiary-color);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    cursor: pointer;
    border-radius: var(--radius-full);
    box-shadow: 2px 2px 0px var(--border-color);
    transition: all var(--transition-speed) var(--transition-bounce);
}

.form-control-file::file-selector-button:hover {
    transform: translate(-1px, -1px);
    box-shadow: 3px 3px 0px var(--border-color);
    background-color: var(--secondary-color);
}

/* --- 7. Tombol (Buttons) --- */
.btn {
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    text-transform: uppercase;
    border: var(--border-width) solid var(--border-color);
    cursor: pointer;
    display: inline-block;
    text-align: center;
    border-radius: var(--radius-full);
    background-color: transparent;
    color: var(--text-main);
    box-shadow: 4px 4px 0px var(--border-color);
    transition: all 0.3s var(--transition-bounce);
    position: relative;
}

.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
    background-color: var(--tertiary-color); /* Secondary button fills yellow on hover */
}

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

.btn-primary {
    background-color: var(--accent-color); /* Violet */
    color: #ffffff;
    box-shadow: 4px 4px 0px var(--border-color);
}

.btn-primary:hover {
    background-color: #7c3aed; /* Darker violet */
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
    color: #ffffff;
}

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

.btn-success {
    background-color: var(--quaternary-color); /* Mint */
    color: var(--text-main);
    box-shadow: 4px 4px 0px var(--border-color);
}

.btn-success:hover {
    background-color: #10b981; /* Darker mint */
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
    color: var(--text-main);
}

.btn-success:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 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: auto;
    border: var(--border-width) solid var(--border-color);
    box-shadow: 5px 5px 0px var(--border-color);
    -webkit-overflow-scrolling: touch;
}

/* 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) {
    /* Navbar Mobile */
    .navbar {
        padding: 0 15px;
    }
    
    .navbar-brand {
        font-size: 1.3rem;
        padding: 4px 10px;
        box-shadow: 3px 3px 0px var(--border-color);
    }
    
    .hamburger-btn {
        display: block;
    }
    
    .navbar-container {
        padding: 0 5px;
    }
    
    .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 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, visibility 0.3s ease;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        opacity: 0;
        visibility: hidden;
    }

    .navbar-nav-container.active {
        max-height: 550px;
        border-top: var(--border-width) solid var(--border-color);
        overflow-y: auto;
        opacity: 1;
        visibility: visible;
    }

    .navbar-nav {
        flex-direction: column;
        padding: 15px 20px;
        gap: 12px;
        width: 100%;
    }
    
    .navbar-nav.auth-nav {
        border-top: 2px dashed var(--border-color);
        padding-top: 15px;
        margin-top: 5px;
    }

    .navbar-nav li a {
        display: block;
        border: var(--border-width) solid var(--border-color);
        text-align: center;
        background-color: #f9f9f9;
        box-shadow: 3px 3px 0px var(--border-color);
        padding: 10px 15px;
        font-size: 0.95rem;
    }

    .user-greeting {
        text-align: center;
        display: block;
        padding: 8px 15px;
        font-size: 0.9rem;
    }
    
    /* Layout & Content Mobile */
    .content-wrapper {
        padding: 20px 15px;
        margin-top: calc(var(--navbar-height) - 10px);
    }
    
    .page-header {
        display: block;
        width: 100%;
        padding: 15px 20px;
        margin-bottom: 20px;
        box-shadow: 3px 3px 0px var(--border-color);
        text-align: center;
    }
    
    .page-header h1 {
        font-size: 1.6rem;
        text-shadow: 1.5px 1.5px 0px var(--border-color);
    }
    
    /* Hero Section Mobile */
    .hero-section {
        padding: 40px 15px;
        margin-bottom: 30px;
        box-shadow: 5px 5px 0px #E2E8F0;
    }
    
    .hero-deco-1 {
        width: 100px;
        height: 100px;
        top: -30px;
        left: -30px;
    }
    
    .hero-deco-2 {
        width: 120px;
        height: 120px;
        bottom: -40px;
        right: -30px;
    }
    
    .hero-title {
        font-size: 2.2rem;
        margin-bottom: 15px;
    }
    
    .hero-desc {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .hero-btn {
        padding: 12px 25px;
        font-size: 0.95rem;
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    /* Card Mobile */
    .card {
        padding: 20px;
        margin-bottom: 25px;
        box-shadow: 4px 4px 0px #E2E8F0;
    }
    
    .card:hover {
        transform: none;
        box-shadow: 4px 4px 0px #E2E8F0;
    }
    
    .card h2 {
        font-size: 1.15rem;
        padding: 4px 10px;
        margin-bottom: 1.2rem;
        box-shadow: 2px 2px 0px var(--border-color);
    }
    
    .card-header {
        margin: -20px -20px 20px -20px;
        padding: 12px 15px;
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
    }
    
    .card-header h2 {
        font-size: 1.25rem !important;
    }
    
    /* Buttons Mobile */
    .card form .btn, .card .btn-primary, .card .btn-success {
        display: block;
        width: 100%;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.95rem;
    }
    
    /* Charts & Result Grid Mobile */
    .charts-grid {
        flex-direction: column;
        gap: 20px;
    }
    
    .chart-box {
        min-width: 100%;
        padding: 15px;
    }
    
    .chart-box h3 {
        font-size: 1rem;
        margin-bottom: 15px;
    }
    
    .result-block {
        padding: 15px;
        margin-top: 1.5rem;
    }
    
    .result-block h2 {
        font-size: 1.1rem;
    }
    
    .result-block h3 {
        font-size: 1.5rem;
    }
    
    /* Form & Input Mobile */
    .form-control, .form-control-file {
        padding: 12px;
        font-size: 0.95rem;
    }
    
    .form-control-file::file-selector-button {
        padding: 6px 14px;
        margin-right: 8px;
        font-size: 0.85rem;
    }
    
    .spinner-container {
        padding: 25px;
        box-shadow: 6px 6px 0px var(--border-color);
    }
    
    .spinner-container p {
        font-size: 0.9rem;
    }
}