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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 10px;
    color: #333;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 15px;
    text-align: center;
    position: relative;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    word-wrap: break-word;
}

header > div {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

#userInfo {
    color: white;
    font-size: 0.9em;
    padding: 5px 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
}

.back-btn {
    position: absolute;
    top: 15px;
    left: 15px;
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    transition: background 0.3s;
    border: none;
    font-size: 0.9em;
    cursor: pointer;
    font-family: inherit;
    min-height: 44px; /* Touch target size */
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

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

.menu-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 40px;
    border-radius: 15px;
    text-decoration: none;
    color: #333;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.menu-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.menu-card .icon {
    font-size: 4em;
    margin-bottom: 20px;
}

.menu-card h2 {
    font-size: 1.8em;
    margin-bottom: 10px;
}

.menu-card p {
    color: #666;
    font-size: 1.1em;
}

.section {
    padding: 20px 15px;
    border-bottom: 1px solid #eee;
}

.section:last-child {
    border-bottom: none;
}

.section h2 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: #667eea;
}

.button-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.btn {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-height: 44px; /* Touch target size */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.btn-secondary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
}

.btn-success:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.3);
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
}

.btn-danger:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(220, 53, 69, 0.3);
}

.status-message {
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    font-weight: 500;
}

.status-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.status-message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

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

.generate-section p {
    margin-bottom: 20px;
    color: #666;
    font-size: 1.1em;
}

.generate-form {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-group label {
    font-weight: 600;
    color: #333;
    font-size: 1em;
}

.input-with-button {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.input-with-button .form-control {
    flex: 1;
    padding: 12px 16px;
    font-size: 1em;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    transition: border-color 0.3s;
}

.input-with-button .form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-with-button .btn {
    padding: 12px 24px;
    white-space: nowrap;
    min-width: 120px;
}

.input-hint {
    color: #666;
    font-size: 0.85em;
    margin-top: -5px;
}

.qr-groups-list {
    margin-top: 20px;
}

.qr-group-item {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.3s, transform 0.2s;
}

.qr-group-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.qr-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    cursor: pointer;
    transition: all 0.3s;
    user-select: none;
    color: white;
}

.qr-group-header:hover {
    background: linear-gradient(135deg, #5568d3 0%, #6a3d8f 100%);
}

.qr-group-header-left {
    display: flex;
    align-items: center;
    gap: 18px;
    flex: 1;
    min-width: 0;
}

.qr-group-toggle {
    font-size: 1.3em;
    color: white;
    font-weight: bold;
    min-width: 24px;
    transition: transform 0.3s;
    flex-shrink: 0;
}

.qr-group-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
    flex: 1;
}

.qr-group-date {
    font-size: 1.15em;
    font-weight: 700;
    color: white;
    letter-spacing: 0.5px;
}

.qr-group-time {
    font-size: 0.95em;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.qr-group-count {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 10px;
    border-radius: 12px;
    display: inline-block;
    width: fit-content;
}

.qr-group-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-shrink: 0;
}

.qr-group-content {
    padding: 24px;
    background: #f8f9fa;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 5000px;
    }
}

.qr-codes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.qr-group-content .qr-codes-grid {
    margin-top: 0;
}

.qr-code-card {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
}

.qr-code-card:hover {
    border-color: #667eea;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.qr-card-checkbox {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
}

.qr-card-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #667eea;
}

.qr-batch-checkbox {
    display: flex;
    align-items: center;
    margin-right: 8px;
}

.qr-batch-checkbox input[type="checkbox"] {
    width: 22px;
    height: 22px;
    cursor: pointer;
    accent-color: #fff;
    margin-right: 5px;
}

.qr-card-actions {
    margin-top: 10px;
}

.btn-small {
    padding: 5px 10px;
    font-size: 0.85em;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    min-height: auto;
}

.qr-group-header .btn-small {
    padding: 10px 18px;
    font-size: 0.9em;
    white-space: nowrap;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.qr-group-header .btn-small:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.3);
}

.qr-group-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.qr-code-card img {
    width: 100%;
    max-width: 150px;
    height: auto;
    border-radius: 5px;
    margin-bottom: 10px;
}

.qr-code-card .qr-id {
    font-size: 0.9em;
    color: #667eea;
    font-weight: 600;
    word-break: break-all;
    margin-bottom: 5px;
}

.qr-code-card .status {
    font-size: 0.8em;
    padding: 5px 10px;
    border-radius: 5px;
    display: inline-block;
    margin-top: 5px;
}

.status.registered {
    background: #d4edda;
    color: #155724;
}

.status.unregistered {
    background: #fff3cd;
    color: #856404;
}

.camera-container {
    max-width: 500px;
    margin: 20px auto;
    border: 3px solid #667eea;
    border-radius: 10px;
    overflow: hidden;
    background: #000;
}

#video {
    width: 100%;
    height: auto;
    display: block;
}

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

.form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
    -webkit-appearance: none;
    appearance: none;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
}

.vehicle-info-card {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    max-width: 600px;
    margin: 0 auto;
}

.vehicle-info-card h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #e9ecef;
    flex-wrap: wrap;
    gap: 8px;
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    font-weight: 600;
    color: #666;
    flex: 0 0 auto;
    min-width: 120px;
}

.info-value {
    color: #333;
    flex: 1 1 auto;
    text-align: right;
    word-break: break-word;
}

.entries-list {
    margin-top: 20px;
}

.entry-card {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
    transition: all 0.3s;
}

.entry-card:hover {
    border-color: #667eea;
    transform: translateX(5px);
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.entry-header h3 {
    color: #667eea;
    margin: 0;
    font-size: 1.1em;
    word-break: break-word;
    flex: 1 1 auto;
}

.status-badge {
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9em;
}

.status-badge.allowed {
    background: #d4edda;
    color: #155724;
}

.status-badge.denied {
    background: #f8d7da;
    color: #721c24;
}

.status-badge.pending {
    background: #fff3cd;
    color: #856404;
}

.controls {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.selection-count {
    padding: 8px 15px;
    background: #e9ecef;
    border-radius: 5px;
    font-weight: 600;
    color: #667eea;
    display: none;
}

.login-container {
    max-width: 500px;
}

.login-form-container {
    max-width: 400px;
    margin: 0 auto;
}

.login-info {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
}

.login-info code {
    background: #e9ecef;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

/* Mobile-first responsive design */
@media (max-width: 768px) {
    body {
        padding: 5px;
    }
    
    .container {
        border-radius: 10px;
        margin: 5px;
    }
    
    header {
        padding: 15px 10px;
        min-height: auto;
    }
    
    header h1 {
        font-size: 1.5em;
        margin-bottom: 8px;
        padding: 0 50px;
    }
    
    header > div {
        position: static;
        margin-top: 10px;
        justify-content: center;
        width: 100%;
    }
    
    #userInfo {
        font-size: 0.8em;
        padding: 4px 8px;
        width: 100%;
        text-align: center;
        margin-bottom: 5px;
    }
    
    .back-btn {
        position: static;
        display: inline-block;
        margin: 5px;
        font-size: 0.85em;
        padding: 10px 14px;
    }
    
    .section {
        padding: 15px 10px;
    }
    
    .section h2 {
        font-size: 1.3em;
        margin-bottom: 12px;
    }
    
    .menu {
        grid-template-columns: 1fr;
        padding: 15px;
        gap: 15px;
    }
    
    .menu-card {
        padding: 25px 20px;
    }
    
    .menu-card .icon {
        font-size: 3em;
        margin-bottom: 15px;
    }
    
    .menu-card h2 {
        font-size: 1.4em;
    }
    
    .menu-card p {
        font-size: 0.95em;
    }
    
    .button-group {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
        padding: 14px 20px;
        font-size: 0.95em;
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .controls .btn {
        width: 100%;
    }
    
    .selection-count {
        width: 100%;
        text-align: center;
        padding: 10px;
    }
    
    .generate-form {
        max-width: 100%;
    }
    
    .input-with-button {
        flex-direction: column;
    }
    
    .input-with-button .btn {
        width: 100%;
    }
    
    .qr-group-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 15px 18px;
    }
    
    .qr-group-header-left {
        width: 100%;
    }
    
    .qr-group-actions {
        width: 100%;
        flex-direction: column;
        gap: 8px;
    }
    
    .qr-group-header .btn-small {
        width: 100%;
        text-align: center;
        padding: 12px 16px;
    }
    
    .qr-group-content {
        padding: 15px;
    }
    
    .qr-group-date {
        font-size: 1em;
    }
    
    .qr-group-time {
        font-size: 0.85em;
    }
    
    .qr-group-count {
        font-size: 0.8em;
        padding: 3px 8px;
    }
    
    .qr-codes-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 15px;
    }
    
    .qr-code-card {
        padding: 12px;
    }
    
    .qr-code-card img {
        max-width: 120px;
    }
    
    .qr-code-card .qr-id {
        font-size: 0.8em;
    }
    
    .camera-container {
        max-width: 100%;
        margin: 15px auto;
        border-width: 2px;
    }
    
    .form {
        max-width: 100%;
    }
    
    .form-control {
        padding: 14px;
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .vehicle-info-card {
        padding: 15px;
        margin: 0;
    }
    
    .vehicle-info-card h3 {
        font-size: 1.2em;
        margin-bottom: 12px;
    }
    
    .info-row {
        flex-direction: column;
        align-items: flex-start;
        padding: 10px 0;
    }
    
    .info-label {
        min-width: auto;
        margin-bottom: 4px;
        font-size: 0.9em;
    }
    
    .info-value {
        text-align: left;
        width: 100%;
        font-size: 1em;
    }
    
    .entry-card {
        padding: 15px;
    }
    
    .entry-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .entry-header h3 {
        width: 100%;
        margin-bottom: 8px;
    }
    
    .status-badge {
        font-size: 0.85em;
        padding: 6px 12px;
    }
    
    .generate-section p {
        font-size: 0.95em;
        padding: 0 10px;
    }
    
    .status-message {
        padding: 12px;
        font-size: 0.9em;
    }
    
    .btn-small {
        padding: 8px 12px;
        font-size: 0.8em;
        min-height: 36px;
    }
}

/* Extra small devices (phones in portrait) */
@media (max-width: 480px) {
    header h1 {
        font-size: 1.3em;
        padding: 0 40px;
    }
    
    .section h2 {
        font-size: 1.2em;
    }
    
    .menu-card {
        padding: 20px 15px;
    }
    
    .menu-card .icon {
        font-size: 2.5em;
    }
    
    .menu-card h2 {
        font-size: 1.2em;
    }
    
    .qr-codes-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .qr-code-card img {
        max-width: 100px;
    }
    
    .btn {
        font-size: 0.9em;
        padding: 12px 16px;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    header {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.3em;
        margin-bottom: 5px;
    }
    
    .section {
        padding: 15px 10px;
    }
    
    .camera-container {
        max-width: 400px;
    }
}