:root {
    /* Color Palette */
    --primary: #ef4444;
    --primary-hover: #dc2626;
    --secondary: #f3f4f6;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --bg-main: #f9fafb;
    --card-bg: #ffffff;
    --success: #10b981;
    --danger: #ef4444;
    
    /* Typography */
    --font-family: 'Inter', 'Noto Sans Sinhala', sans-serif;
    
    /* Layout & Styling */
    --border-radius: 16px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --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);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}


body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    box-shadow: 4px 0 24px rgba(0,0,0,0.02);
}

.logo {
    padding: 32px 24px;
    border-bottom: 1px solid var(--border);
}

.logo h2 {
    color: var(--primary);
    font-weight: 800;
    font-size: 24px;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.main-nav {
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    border-radius: 12px;
    transition: var(--transition);
}

.nav-item:hover {
    background-color: var(--secondary);
    color: var(--text-main);
    transform: translateX(4px);
}

.nav-item.active {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

.top-header {
    background-color: var(--card-bg);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 99;
}

.top-header h1 {
    font-size: 20px;
    font-weight: 600;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Views */
.content-body {
    padding: 32px;
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.content-body.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.search-bar {
    display: flex;
    gap: 16px;
}

.search-bar input {
    flex: 1;
}

.placeholder-message {
    text-align: center;
    padding: 48px;
    color: var(--text-muted);
}

/* Form Sections */
.form-section {
    transition: var(--transition);
}

.form-section:hover {
    box-shadow: var(--shadow-md);
}

.section-header {
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.section-header h3 {
    color: var(--primary);
    font-size: 18px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 4px;
}

/* Loaders */
.loader {
    text-align: center;
    padding: 40px;
    font-size: 16px;
    font-weight: 600;
    background: linear-gradient(90deg, #ff007f, #007fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* Grids */
.grid-2-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.checklist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

/* Inputs */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-main);
}

input[type="text"],
input[type="tel"],
input[type="number"],
input[type="date"],
select,
textarea {
    padding: 12px 16px;
    width: 100%;
    max-width: 100%;
    border: 1px solid var(--primary);
    border-radius: 10px;
    font-family: inherit;
    font-size: 14px;
    transition: var(--transition);
    background-color: var(--secondary);
    color: var(--text-main);
}

input[type="text"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
    background-color: #fff;
}

/* Checklist Items */
.check-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: var(--secondary);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--primary);
}

.check-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.check-options {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-left: 24px;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    cursor: pointer;
}

/* Tyres */
.tyre-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.tyre-item {
    background: var(--secondary);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--primary);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tyre-item h4 {
    text-align: center;
    margin-bottom: 8px;
    color: var(--primary);
}

/* Damage Diagram */
.damage-diagram-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.damage-tools {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.tool-btn {
    padding: 8px 16px;
    border: 1px solid var(--primary);
    background: white;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

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

.tool-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.marker-icon {
    font-size: 18px;
}

.marker-icon.dent { color: #e63946; }
.marker-icon.scratch { color: #f4a261; }
.marker-icon.crack { color: #2a9d8f; }

.tool-btn.active .marker-icon {
    color: white;
}

.diagram-area {
    position: relative;
    max-width: 100%;
    border: 2px dashed var(--primary);
    border-radius: 12px;
    padding: 20px;
    background: white;
    cursor: crosshair;
}

.diagram-img {
    max-width: 400px;
    width: 100%;
    display: block;
    pointer-events: none;
    user-select: none;
}

#markers-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* Let clicks pass through to diagram-area */
}

.damage-marker {
    position: absolute;
    transform: translate(-50%, -50%);
    font-size: 24px;
    pointer-events: auto; /* Allow clicking marker to delete maybe */
    cursor: pointer;
    text-shadow: 0 0 4px rgba(255,255,255,0.8);
}

.damage-marker.dent { color: #e63946; }
.damage-marker.scratch { color: #f4a261; }
.damage-marker.crack { color: #2a9d8f; }

/* Photos */
.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.photo-upload {
    background: var(--secondary);
    border: 1px dashed var(--primary);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.photo-upload label {
    font-weight: 600;
}

.photo-input {
    width: 100%;
    font-size: 12px;
}

/* Signatures */
.signatures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.signature-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

canvas {
    border: 1px solid var(--primary);
    border-radius: 8px;
    background: #fff;
    cursor: crosshair;
    touch-action: none; /* Important for touch devices */
    width: 100%;
    height: 150px;
}

.sig-actions {
    display: flex;
    justify-content: flex-end;
}

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2), 0 2px 4px -1px rgba(79, 70, 229, 0.1);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3), 0 4px 6px -2px rgba(79, 70, 229, 0.15);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--secondary);
    border-color: #d1d5db;
    transform: translateY(-1px);
}

.info-action-btn {
    background-color: var(--danger);
    color: white;
    border: 1px solid var(--danger);
}

.info-action-btn:hover {
    background-color: #dc2626;
    border-color: #dc2626;
    color: white;
    transform: translateY(-1px);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
    width: 100%;
    max-width: 300px;
}

.form-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 40px;
}

#save-status {
    font-weight: 500;
}

.status-success { color: var(--success); }
.status-error { color: var(--danger); }

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: static;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        padding-right: 16px;
    }
    
    .logo {
        border-bottom: none;
    }
    
    .main-nav {
        flex-direction: row;
        padding: 0;
    }
    
    .nav-item {
        padding: 8px 12px;
    }
    
    .nav-item span {
        display: none; /* Hide text on mobile nav if you add spans */
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-body {
        padding: 16px;
    }
    
    .top-header {
        padding: 12px 16px;
    }
    
    .info-action-btn.btn-sm {
        padding: 12px 20px;
        font-size: 16px;
        width: 100%;
        display: flex;
        justify-content: center;
        margin-top: 8px;
    }
}

/* --- Advanced UI Components --- */

/* Step Navigation */
.step-nav {
    display: flex;
    gap: 8px;
    background: var(--surface);
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
    overflow-x: auto;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    background: #f1f5f9;
    color: #64748b;
    font-weight: 500;
    white-space: nowrap;
}

.step-item.active {
    background: var(--primary);
    color: white;
}

.step-item.completed {
    background: #e2e8f0;
    color: var(--primary);
}

.step-num {
    background: white;
    color: inherit;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.step-item.active .step-num {
    color: var(--primary);
}

/* Section Cards */
.section-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.section-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
    display: block;
}

/* Info Blocks */
.info-block {
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
}

.info-yellow {
    background-color: #fef9c3;
    color: #854d0e;
    border: 1px solid #fde047;
}

.info-red {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.info-green {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.info-content ul, .info-content ol {
    margin-left: 20px;
    margin-top: 8px;
    margin-bottom: 8px;
}

.info-content li {
    margin-bottom: 4px;
}

/* Radio Cards */
.radio-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 12px;
    margin-bottom: 8px;
}

.radio-card {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.radio-card:hover {
    border-color: #cbd5e1;
    background: #f1f5f9;
}

.radio-card.active {
    border-color: var(--primary);
    background: #fff5f5; /* Subtle primary tint */
}

.card-icon {
    display: block;
    font-size: 24px;
    margin-bottom: 8px;
}

.card-text {
    display: block;
    font-weight: 500;
    font-size: 13px;
    color: var(--text);
}

.radio-card.active .card-text {
    color: var(--primary);
}

/* Signature Pad */
.signature-pad {
    background: #fff;
    cursor: crosshair;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.05);
}