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

:root {
    --primary-color: #003d82;
    --secondary-color: #00a0e9;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-bg: #f8f9fa;
    --border-color: #dee2e6;
    --text-dark: #212529;
    --text-light: #6c757d;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-dark);
    line-height: 1.6;
    /* Mobile optimizations */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Login Page Styles */
.login-container {
    max-width: 500px;
    margin: 50px auto;
}

.login-box {
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.login-header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.login-form {
    padding: 40px;
}

.login-form .form-group {
    margin-bottom: 25px;
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid #c33;
    font-weight: 600;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Progress Bar */
.progress-bar {
    display: flex;
    background: var(--light-bg);
    padding: 20px 10px;
    overflow-x: auto;
    border-bottom: 2px solid var(--border-color);
    /* Mobile smooth scrolling */
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--secondary-color) var(--light-bg);
}

/* Progress bar scrollbar styling for webkit browsers */
.progress-bar::-webkit-scrollbar {
    height: 6px;
}

.progress-bar::-webkit-scrollbar-track {
    background: var(--light-bg);
}

.progress-bar::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 3px;
}

.progress-step {
    flex: 1;
    text-align: center;
    padding: 10px 5px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light);
    position: relative;
    min-width: 100px;
}

.progress-step:not(:last-child)::after {
    content: '→';
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.progress-step.active {
    color: var(--primary-color);
    background: white;
    border-radius: 5px;
    box-shadow: var(--shadow);
}

.progress-step.completed {
    color: var(--success-color);
}

/* Form Styles */
.step {
    padding: 40px;
    animation: fadeIn 0.3s ease-in;
}

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

h2 {
    color: var(--primary-color);
    margin-bottom: 30px;
    font-size: 2rem;
    border-bottom: 3px solid var(--secondary-color);
    padding-bottom: 10px;
}

h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

/* Form Groups */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
    /* Mobile touch optimizations */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    touch-action: manipulation;
    min-height: 44px; /* Minimum touch target size */
}

/* Prevent iOS zoom on input focus */
@media screen and (max-width: 768px) {
    select,
    textarea,
    input[type="text"],
    input[type="password"],
    input[type="number"],
    input[type="date"] {
        font-size: 16px !important;
    }
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 160, 233, 0.1);
}

.form-group input[type="file"] {
    padding: 8px;
    cursor: pointer;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-light);
    font-size: 0.85rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Image Preview */
.image-preview {
    margin-top: 15px;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.image-preview img {
    width: 100%;
    max-height: 300px;
    object-fit: contain;
    display: block;
}

/* Inspection Grid */
.insp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.insp-item label {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.insp-item select {
    width: 100%;
}

/* Tire Section */
.tire-info-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    border-left: 5px solid var(--secondary-color);
}

.tire-info-box h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.tire-info-box p {
    margin-bottom: 8px;
    line-height: 1.8;
}

.tire-info-box strong {
    color: var(--primary-color);
}

.tire-section {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 2px solid var(--border-color);
}

.tire-input-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 15px;
}

.tire-result {
    background: white;
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
    font-weight: 600;
    border-left: 4px solid var(--secondary-color);
    display: none;
}

.tire-result.show {
    display: block;
}

.tire-result .date {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.tire-result .manufacturer-date {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 5px;
}

/* Summary Box */
.summary-box {
    background: var(--light-bg);
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
    border: 2px solid var(--border-color);
}

.summary-box h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.summary-item {
    padding: 12px;
    margin-bottom: 10px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
}

.summary-item strong {
    color: var(--primary-color);
}

/* Buttons */
.button-group {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    justify-content: flex-end;
}

button {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    /* Mobile touch optimizations */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px; /* Minimum touch target size */
    user-select: none;
}

button[type="button"] {
    background: var(--text-light);
    color: white;
}

button[type="button"]:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary {
    background: linear-gradient(135deg, var(--success-color) 0%, #20c997 100%);
    color: white;
    font-size: 1.1rem;
    padding: 15px 40px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

/* Loading Indicator */
#loadingIndicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

#loadingIndicator p {
    color: white;
    font-size: 1.2rem;
    margin-top: 20px;
    font-weight: 600;
}

.spinner {
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top: 5px solid white;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .progress-step {
        font-size: 0.7rem;
        min-width: 80px;
    }

    .progress-step:not(:last-child)::after {
        display: none;
    }

    .step {
        padding: 20px;
    }

    h2 {
        font-size: 1.5rem;
    }

    .insp-grid {
        grid-template-columns: 1fr;
    }

    .tire-input-group {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    button {
        width: 100%;
    }

    /* Login mobile adjustments */
    .login-container {
        margin: 10px auto;
    }

    .login-form {
        padding: 30px 20px;
    }

    .login-header {
        padding: 20px;
    }

    .login-header h1 {
        font-size: 1.5rem;
    }

    /* Summary box mobile */
    .summary-box {
        padding: 15px;
    }

    .summary-item {
        font-size: 0.9rem;
    }

    /* Tire sections mobile */
    .tire-section {
        padding: 15px;
    }

    .tire-info-box {
        padding: 15px;
    }

    .tire-info-box h3 {
        font-size: 1.1rem;
    }

    .tire-info-box p {
        font-size: 0.9rem;
    }

    /* Form groups mobile */
    .form-group {
        margin-bottom: 20px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 0.95rem;
    }

    /* Image upload grid mobile */
    .image-upload-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .image-upload-item {
        padding: 12px;
    }

    /* King features mobile */
    .king-feature {
        padding: 12px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .progress-bar {
        padding: 10px 5px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .progress-step {
        font-size: 0.6rem;
        min-width: 60px;
        padding: 5px;
        flex-shrink: 0;
    }

    .step {
        padding: 15px;
    }

    h2 {
        font-size: 1.3rem;
        padding-bottom: 8px;
    }

    h3 {
        font-size: 1.2rem;
    }

    h4 {
        font-size: 1.1rem;
    }

    /* Login mobile very small */
    .login-container {
        margin: 5px auto;
    }

    .login-form {
        padding: 20px 15px;
    }

    .login-header {
        padding: 15px;
    }

    .login-header h1 {
        font-size: 1.3rem;
    }

    .btn-login {
        padding: 12px;
        font-size: 1rem;
    }

    /* Buttons mobile */
    button {
        padding: 12px 20px;
        font-size: 0.95rem;
    }

    .btn-primary {
        padding: 12px 30px;
        font-size: 1rem;
    }

    /* Summary mobile */
    .summary-box {
        padding: 12px;
    }

    .summary-item {
        padding: 10px;
        font-size: 0.85rem;
    }

    /* Tire sections small mobile */
    .tire-section {
        padding: 12px;
    }

    .tire-info-box {
        padding: 12px;
    }

    .tire-info-box h3 {
        font-size: 1rem;
    }

    .tire-info-box p {
        font-size: 0.85rem;
    }

    .tire-result {
        padding: 10px;
    }

    .tire-result .date {
        font-size: 1rem;
    }

    /* Form elements small mobile */
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px;
        font-size: 0.9rem;
    }

    .form-group label {
        font-size: 0.95rem;
        margin-bottom: 6px;
    }

    .form-group small {
        font-size: 0.8rem;
    }

    /* Insp items small mobile */
    .insp-item label {
        font-size: 0.9rem;
    }

    /* Image previews mobile */
    .image-preview img {
        max-height: 200px;
    }

    .image-upload-item .image-preview img {
        max-height: 150px;
    }

    /* King features small mobile */
    .king-feature {
        padding: 10px;
    }

    .king-feature label {
        font-size: 0.95rem;
    }

    /* Error message mobile */
    .error-message {
        padding: 10px;
        font-size: 0.9rem;
    }
}

/* Tablet adjustments */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 900px;
    }

    .insp-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tire-input-group {
        grid-template-columns: 1fr 1fr;
    }

    .image-upload-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .container {
        box-shadow: none;
    }

    .progress-bar,
    .button-group {
        display: none;
    }

    .step {
        page-break-inside: avoid;
    }
}

/* Image Upload Grid */
.image-upload-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.image-upload-item {
    background: var(--light-bg);
    padding: 15px;
    border-radius: 10px;
    border: 2px solid var(--border-color);
}

.image-upload-item label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1rem;
}

.image-upload-item input[type="file"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
}

.image-upload-item .image-preview {
    margin-top: 10px;
}

/* King Feature Highlight */
.king-feature {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    padding: 15px;
    border-radius: 8px;
    border: 2px solid #ffc107;
}

.king-feature label {
    color: #856404;
    font-weight: 700;
}

/* Issue Details Section */
.issue-details {
    display: none;
    margin-top: 15px;
    padding: 15px;
    background: #fff5f5;
    border-left: 4px solid #dc3545;
    border-radius: 5px;
    animation: fadeIn 0.3s ease-in;
}

.issue-details.show {
    display: block;
}

.issue-details label {
    font-weight: 600;
    color: #721c24;
    margin-bottom: 8px;
}

.issue-details textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid #dc3545;
    border-radius: 5px;
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.issue-details input[type="file"] {
    width: 100%;
    padding: 8px;
    border: 2px solid #dc3545;
    border-radius: 5px;
    margin-bottom: 10px;
}

.issue-details .image-preview {
    margin-top: 10px;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}