/* ==========================================================================
   DESIGN SYSTEM & VARIABLES (Hyundai Corporate Identity-Inspired)
   ========================================================================== */
:root {
    --hyundai-blue: #002c5f;
    --hyundai-light-blue: #0072bc;
    --hyundai-sand: #e4dcd3;
    --bg-light: #f4f7f9;
    --text-dark: #333333;
    --text-muted: #666666;
    --success-green: #2e7d32;
    --danger-red: #c62828;
    --border-color: #ddd;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.5;
    padding: 20px 10px;
}

.app-container {
    max-width: 650px;
    margin: 0 auto;
}

/* ==========================================================================
   CARD & LAYOUT COMPONENT
   ========================================================================== */
.card {
    background: #ffffff;
    padding: 30px 25px;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0, 44, 95, 0.05);
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.card.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.header {
    text-align: center;
    margin-bottom: 25px;
}

.logo {
    width: 160px;
    height: auto;
    margin-bottom: 12px;
}

h2 {
    color: var(--hyundai-blue);
    font-size: 22px;
    font-weight: 700;
}

h3 {
    color: var(--hyundai-blue);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--bg-light);
    padding-bottom: 10px;
}

/* ==========================================================================
   FORM ELEMENTS
   ========================================================================== */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--hyundai-blue);
    font-size: 14px;
}

input[type="text"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-dark);
    background-color: #ffffff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--hyundai-light-blue);
    box-shadow: 0 0 0 3px rgba(0, 114, 188, 0.15);
}

input:disabled {
    background-color: #f1f3f5;
    color: var(--text-muted);
    cursor: not-allowed;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn-main {
    background: var(--hyundai-blue);
    color: #ffffff;
    border: none;
    padding: 14px 20px;
    border-radius: 8px;
    width: 100%;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn-main:hover {
    background: #001f44;
}

.btn-main:active {
    transform: scale(0.98);
}

.btn-back {
    background: #e9ecef;
    color: var(--text-dark);
    border: none;
    padding: 14px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-back:hover {
    background: #dee2e6;
}

.nav-btns {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 12px;
    margin-top: 25px;
}

/* ==========================================================================
   STRUCTURED CHECKLIST COMPONENT
   ========================================================================== */
.category-section {
    margin-bottom: 25px;
    background: #ffffff;
    border: 1px solid #eef2f5;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.01);
}

.category-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--hyundai-blue);
    margin: 0 0 12px 0;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--hyundai-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ceklist-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px dashed #f1f3f5;
}

.item-name {
    font-size: 14px;
    font-weight: 500;
    color: #444444;
}

.radio-toggle-group {
    display: inline-flex;
    background: #f1f3f5;
    padding: 3px;
    border-radius: 6px;
}

.radio-toggle-group input[type="radio"] {
    display: none;
}

.lbl-toggle {
    display: block;
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    user-select: none;
    transition: all 0.15s ease;
    text-align: center;
    min-width: 75px;
}

.radio-toggle-group input[type="radio"]:checked + .lbl-ada {
    background: var(--success-green);
    color: #ffffff;
}

.radio-toggle-group input[type="radio"]:checked + .lbl-tidak {
    background: var(--danger-red);
    color: #ffffff;
}

/* ==========================================================================
   IMAGE UPLOAD & PREVIEW GRID
   ========================================================================== */
#image-preview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 12px;
}

.preview-img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* ==========================================================================
   SIGNATURE PAD RESPONSIVE COMPONENT
   ========================================================================== */
.signature-wrapper {
    border: 2px dashed #cbd5e1;
    background: #f8fafc;
    border-radius: 8px;
    margin: 15px 0;
    height: 280px;
    position: relative;
    overflow: hidden;
}

canvas {
    width: 100%;
    height: 100%;
    touch-action: none;
    cursor: crosshair;
}

#sig-name-display {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-dark);
    margin-top: 5px;
    text-align: center;
    background: #eef2f5;
    padding: 6px;
    border-radius: 4px;
}

.text-center {
    text-align: center;
}