:root {
    /* Light Mode Variables (Default) */
    --bg-color: #f7f9fc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;

    --brand-primary: #2563eb;
    --brand-hover: #1d4ed8;
    --brand-secondary: #f1f5f9;
    --brand-secondary-hover: #e2e8f0;

    --agree-color: #10b981; /* Green for agree */
    --disagree-color: #8b5cf6; /* Purple for disagree */
    --neutral-color: #94a3b8; /* Gray for neutral */

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-mode {
    /* Dark Mode Variables */
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --border-color: #334155;

    --brand-primary: #3b82f6;
    --brand-hover: #60a5fa;
    --brand-secondary: #334155;
    --brand-secondary-hover: #475569;

    --agree-color: #34d399;
    --disagree-color: #a78bfa;
    --neutral-color: #64748b;

    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    font-size: 1.25rem;
}

.theme-toggle:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* App Container */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Screens */
.screen {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    position: absolute;
    width: 100%;
    left: 0;
    transition: var(--transition);
    visibility: hidden;
}

.screen.view-active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    position: relative;
    visibility: visible;
}

.hidden {
    display: none !important;
}

/* Typography & General Use */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

/* Cards */
.card {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    transition: var(--transition);
}

/* Buttons */
button {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--brand-primary);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--brand-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--brand-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--brand-secondary-hover);
}

.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--neutral-color) !important;
    box-shadow: none !important;
    transform: none !important;
}

/* Landing Screen */
#landing-screen {
    text-align: center;
}

.logo-area {
    margin-bottom: 2rem;
}

.logo-icon {
    color: var(--brand-primary);
    margin-bottom: 1rem;
    display: inline-block;
}

.main-title {
    font-size: 2.5rem;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.feature-item i {
    color: var(--agree-color);
    font-size: 1.25rem;
}

.disclaimer {
    font-size: 0.875rem;
    margin-top: 2rem;
    color: var(--text-secondary);
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus {
    border-color: var(--brand-primary);
    background-color: var(--surface-color);
}

.flex-group {
    display: flex;
    gap: 1.5rem;
}

.sub-group {
    flex: 1;
}

.action-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 2.5rem;
}

/* Progress Bar */
.progress-container {
    margin-bottom: 3rem;
    position: sticky;
    top: 20px;
    z-index: 10;
    background-color: var(--surface-color);
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.progress-bar-bg {
    height: 8px;
    background-color: var(--brand-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--brand-primary);
    width: 0%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-text {
    text-align: right;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Questions (16personalities style) */
.question-item {
    margin-bottom: 3.5rem;
    text-align: center;
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.question-text {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.likert-scale {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.likert-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.likert-label.left { color: var(--agree-color); }
.likert-label.right { color: var(--disagree-color); }

/* The radio buttons */
input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    margin: 0;
    outline: none;
    cursor: pointer;
    border-radius: 50%;
    border: 3px solid var(--border-color);
    background-color: transparent;
    transition: var(--transition);
}

/* Size spectrum */
input[type="radio"][value="5"], input[type="radio"][value="1"] {
    width: 50px; height: 50px;
}
input[type="radio"][value="4"], input[type="radio"][value="2"] {
    width: 40px; height: 40px;
}
input[type="radio"][value="3"] {
    width: 30px; height: 30px;
}

/* Borders based on value side */
input[type="radio"].agree-side {
    border-color: var(--agree-color);
}
input[type="radio"].disagree-side {
    border-color: var(--disagree-color);
}

/* Checked state */
input[type="radio"].agree-side:checked {
    background-color: var(--agree-color);
}
input[type="radio"].disagree-side:checked {
    background-color: var(--disagree-color);
}
input[type="radio"][value="3"]:checked {
    background-color: var(--neutral-color);
    border-color: var(--neutral-color);
}

/* Labels visibility (Setuju / Tidak Setuju) */
.likert-text-label {
    display: none; /* Hide primarily until large screens if needed, usually just color coding works */
}

@media (min-width: 600px) {
    .likert-text-label {
        display: block;
        opacity: 0.7;
        margin-top: 10px;
    }
}

.test-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

/* Loading Screen */
.loading-wrapper {
    text-align: center;
    padding: 4rem 2rem;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid var(--brand-secondary);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    margin: 0 auto 2rem auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* Result Area */
.result-header {
    text-align: center;
    margin-bottom: 2rem;
}
.result-header h3 {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
}

.section-badge {
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    color: var(--brand-primary);
    margin-bottom: 0.5rem;
}

.archetype-card {
    text-align: center;
    background: linear-gradient(135deg, var(--surface-color) 0%, var(--brand-secondary) 100%);
    border-left: 5px solid var(--brand-primary);
}

.archetype-card h1 {
    font-size: 2rem;
    color: var(--brand-primary);
    margin-bottom: 1rem;
}

.chart-wrapper {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    height: 400px; /* Force height for radar chart */
}

.insight-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

@media (min-width: 768px) {
    .insight-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.insight-item {
    margin-bottom: 0;
}

.full-width {
    grid-column: 1 / -1;
}

.icon-accent {
    font-size: 2rem;
    color: var(--brand-primary);
    margin-bottom: 1rem;
    display: inline-block;
}

.highlight-border {
    border: 2px solid var(--agree-color);
}

.insight-text {
    font-size: 0.95rem;
    line-height: 1.7;
    white-space: pre-wrap;
}

.final-disclaimer {
    margin-top: 3rem;
    font-size: 0.8rem;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.action-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    max-width: 90%;
    width: 400px;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

#qrcode-container {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    background: white; /* QR must be white bg */
    padding: 10px;
    border-radius: 8px;
}

.mt-3 {
    margin-top: 1.5rem;
}

/* Responsive adjustments for phones */
@media (max-width: 599px) {
    .likert-scale {
        gap: 10px;
    }
    
    input[type="radio"][value="5"], input[type="radio"][value="1"] {
        width: 40px; height: 40px;
    }
    input[type="radio"][value="4"], input[type="radio"][value="2"] {
        width: 32px; height: 32px;
    }
    input[type="radio"][value="3"] {
        width: 24px; height: 24px;
    }
    
    .flex-group {
        flex-direction: column;
        gap: 0;
    }
}