:root {
    --bg-dark-primary: #1a1d24;
    --bg-dark-secondary: #272c36;
    --text-light: #f0f0f0;
    --text-dark: #333;
    --border-color: #404756;
    --primary-color: #6a8dcf;
    --success-color: #81C784;
    --delete-color: #E57373;
    --warning-color: #FFD700;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-dark-primary);
    color: var(--text-light);
}

a {
    text-decoration: none;
    color: inherit;
}

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

.sidebar {
    width: 250px;
    background: var(--bg-dark-secondary);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    border-right: 1px solid var(--border-color);
}

.sidebar h2 {
    text-align: center;
    padding: 1.5rem 0;
    font-size: 1.3rem;
    letter-spacing: 1px;
    font-weight: normal;
}

.sidebar nav a {
    padding: 1.1rem 1.75rem;
    display: block;
    color: var(--text-light);
    transition: 0.2s ease-in-out;
    font-weight: 500;
    border-left: 4px solid transparent;
}

.sidebar nav a:hover {
    background: #34495E;
    border-left-color: var(--primary-color);
}

.sidebar nav a.active {
    background-color: #34495e;
    color: white;
    font-weight: 700;
    border-left: 5px solid var(--primary-color);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
}

.topbar {
    background: var(--bg-dark-secondary);
    padding: 1.5rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.topbar h1 {
    font-size: 1.5rem;
    color: var(--text-light);
    font-weight: 600;
    margin: 0;
    padding: 0;
}

.topbar-right-content {
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 500;
}

.dashboard {
    padding: 2.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card, .card2 {
    background: var(--bg-dark-secondary);
    padding: 1.75rem 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
}

.card:hover, .card2:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.card h3, .card2 h3 {
    margin-bottom: 1rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: #aaa;
}

.card p, .card2 p {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-light);
}

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

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.chart-header h3 {
    margin-bottom: 0;
    color: var(--text-light);
}

.chart-header select {
    width: auto;
    flex-grow: 1;
    max-width: 200px;
}

.chart-header.no-margin-bottom {
    margin-bottom: 0;
}

.survey-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.survey-table thead tr {
    background: var(--bg-dark-primary);
}

.survey-table th {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.survey-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.survey-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.survey-table tbody tr:last-child td {
    border-bottom: none;
}

.loading-surveys-cell {
    padding: 20px;
    text-align: center;
    color: #aaa;
}

.survey-table .actions-cell {
    text-align: center;
}

.new-survey-btn {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 500;
    padding: 1rem 2rem;
    font-size: 1rem;
    box-shadow: var(--shadow);
}

.questions-container {
    padding: 1.5rem;
    border: 1px dashed var(--primary-color);
}

.no-questions-text {
    color: #aaa;
    margin-bottom: 1rem;
}

.question-edit-group {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

#add-question-btn {
    width: auto;
    margin-top: 1rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

#export-form {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
}

#export-form .form-group {
    flex-grow: 1;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

#export-form label {
    margin-bottom: 0;
    flex-shrink: 0;
    font-size: 1rem;
    color: var(--text-light);
}

#export-form select {
    width: 100%;
    flex-grow: 1;
    padding: 0.9rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-dark-primary);
    color: var(--text-light);
}

#export-form button {
    flex-shrink: 0;
}

input, select, textarea {
    padding: 0.9rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    width: 100%;
    background: var(--bg-dark-primary);
    transition: all 0.2s;
    font-size: 1rem;
    color: var(--text-light);
}

.survey-page-wrapper {
    max-width: 700px;
    margin: 40px auto;
    padding: 30px;
    background: var(--bg-dark-secondary);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.survey-page-wrapper h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 30px;
    text-align: center;
    color: var(--primary-color);
}

#survey-edit-form {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-grow: 1;
    padding-right: 15px;
    gap: 1.25rem;
}

.form-group {
    margin-bottom: 25px;
    padding: 0;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 20px;
}

.form-group:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-group > label {
    font-weight: 500;
    font-size: 1.15rem;
    margin-bottom: 15px;
    display: block;
    color: var(--text-light);
}

.rating-group {
    display: flex;
    margin-top: 10px;
    align-items: center;
    justify-content: flex-start;
}

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

.number-rating-label {
    padding: 6px 10px;
    margin: 0 5px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    background-color: transparent;
    color: var(--text-light);
    transition: all 0.2s;
    font-size: 1rem;
    line-height: 1.5;
}

.rating-group input[type="radio"]:checked + .number-rating-label {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--bg-dark-primary);
    font-weight: 600;
    transform: scale(1.05);
}

.number-rating-label:hover {
    background-color: var(--bg-dark-primary);
    border-color: var(--primary-color);
}

.rating-group:has(.star-rating-label) {
    flex-direction: row-reverse;
    justify-content: flex-end;
    gap: 0;
}

.star-rating-label {
    font-size: 28px;
    color: var(--border-color);
    cursor: pointer;
    padding: 0 3px;
    transition: color 0.2s;
    line-height: 1;
}

.star-rating-label:before {
    content: '★';
}

.rating-group input[type="radio"]:checked ~ .star-rating-label {
    color: var(--warning-color);
}

.rating-group .star-rating-label:hover,
.rating-group .star-rating-label:hover ~ .star-rating-label {
    color: var(--warning-color);
}


form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

label {
    font-weight: 500;
    color: #aaa;
    margin-bottom: 0.5rem;
    display: block;
    font-size: 0.9rem;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-dark-primary);
    box-shadow: 0 0 0 3px rgba(106, 141, 207, 0.2);
}

button {
    padding: 0.9rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: 0.2s;
    margin-right: 0.5rem;
}

button.primary, .submit-button {
    background: var(--primary-color);
    color: #fff;
}

button.primary:hover, .submit-button:hover {
    background: #5a7bbf;
}

button.delete {
    background: var(--delete-color);
    color: #fff;
}

button.delete:hover {
    background: #E53935;
}

button.success {
    background: var(--success-color);
    color: #fff;
}

button.success:hover {
    background: #66BB6A;
}

#api-response-container {
    margin-top: 1rem;
    grid-column: 1 / -1;
}

#api-response-container pre, pre#recent-borrowers {
    background: #111;
    color: var(--success-color);
    padding: 1.5rem;
    border-radius: 12px;
    overflow-x: auto;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 0.9em;
    line-height: 1.6;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.modal-backdrop.modal-visible {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-dark-secondary);
    color: var(--text-light);
    padding: 1.5rem 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 90%;
    max-width: 400px;
    position: relative;
    transition: transform 0.3s ease;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-visible .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    color: #aaa;
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-light);
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-light);
    font-weight: 600;
}

.modal-content .form-group {
    margin-bottom: 1.5rem;
}

.modal-content .form-group label {
    margin-bottom: 0.5rem;
    display: block;
    font-size: 0.9rem;
}

.modal-content button {
    width: auto;
    margin-top: 1rem;
}

.login-error {
    color: var(--delete-color);
    text-align: center;
    min-height: 1.2em;
    font-weight: 500;
    font-size: 0.9rem;
}

.card#analytics {
    grid-column: 1 / -1;
    height: 400px;
    position: relative;
}

#analyticsChart {
    width: 100% !important;
    height: 100% !important;
}

.form-group:has(input[type="checkbox"]) {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
}

.form-group input[type="checkbox"] {
    width: auto;
    height: 1.1em;
    accent-color: var(--primary-color);
}

.form-group:has(input[type="checkbox"]) label {
    display: inline;
    margin-bottom: 0;
    color: var(--text-light);
    font-weight: 500;
}

.modal-share-content {
    background: var(--bg-dark-secondary);
    color: var(--text-light);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 90%;
    max-width: 450px;
    position: relative;
    border: 1px solid var(--border-color);
    text-align: center;
}

.modal-share-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

#qrcode-preview-container {
    padding: 10px;
    margin: 15px auto;
    display: inline-block;
    background-color: white;
    border-radius: 8px;
}

#qrcode-canvas canvas {
    display: block;
}

.share-link-group {
    margin-top: 20px;
    padding: 10px;
    background: var(--bg-dark-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    word-break: break-all;
    font-size: 0.9em;
    color: #aaa;
}

.share-link-group a {
    color: var(--primary-color);
}

.copy-btn {
    padding: 0.5rem 1rem;
    margin-top: 10px;
    background: var(--success-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

@media(max-width: 768px) {
    .wrapper {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        flex-direction: row;
        overflow-x: auto;
        height: auto;
        position: static;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .sidebar nav {
        display: flex;
        flex-grow: 1;
    }

    .sidebar h2 {
        display: none;
    }

    .sidebar nav a {
        flex: 1;
        text-align: center;
        padding: 0.8rem;
        border-left: none;
        border-bottom: 4px solid transparent;
        white-space: nowrap;
    }

    .sidebar nav a:hover {
        border-left-color: transparent;
        border-bottom-color: var(--primary-color);
    }

    .main {
        height: auto;
        overflow-y: visible;
    }

    .dashboard {
        grid-template-columns: 1fr;
        padding: 1.5rem;
    }

    .topbar {
        padding: 1rem 1.5rem;
    }

    #export-form {
        flex-direction: column;
        align-items: stretch;
    }

    #export-form .form-group {
        flex-direction: row;
    }

    #export-form button {
        width: 100%;
    }
}