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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-bg: #ecf0f1;
    --border-color: #bdc3c7;
    --text-color: #2c3e50;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

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

header p {
    font-size: 1.1em;
    opacity: 0.9;
}

main {
    padding: 40px;
}

/* Form Sections */
.input-section,
.preview-section,
.results-section {
    margin-bottom: 30px;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1em;
    font-family: inherit;
    transition: border-color 0.3s;
}

.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(52, 152, 219, 0.1);
}

/* Input Method Tabs */
.input-method {
    margin: 30px 0;
}

.input-method label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
}

.method-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.method-btn {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-color);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.method-btn:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.method-btn.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

/* User Entries */
#userList {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.user-entry {
    background: white;
    padding: 20px;
    border-radius: 4px;
    margin-bottom: 15px;
    border-left: 4px solid var(--secondary-color);
}

.user-entry:last-child {
    margin-bottom: 0;
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--light-bg);
}

.entry-header span {
    font-weight: 600;
    color: var(--primary-color);
}

.remove-btn {
    padding: 6px 12px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background 0.3s;
}

.remove-btn:hover {
    background: #c0392b;
}

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

.entry-fields input[type="text"],
.entry-fields input[type="email"],
.entry-fields input[type="password"],
.entry-fields input[type="tel"],
.entry-fields select {
    grid-column: auto;
}

.entry-fields textarea {
    grid-column: 1 / -1;
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 30px;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.primary-btn {
    background: var(--secondary-color);
    color: white;
}

.primary-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.success-btn {
    background: var(--success-color);
    color: white;
}

.success-btn:hover {
    background: #229954;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.secondary-btn {
    background: var(--light-bg);
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

.secondary-btn:hover {
    background: white;
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

#addUserBtn {
    width: 100%;
    margin-top: 15px;
}

/* CSV Upload */
.csv-upload {
    background: var(--light-bg);
    padding: 30px;
    border-radius: 4px;
    text-align: center;
    border: 2px dashed var(--border-color);
}

#csvFile {
    display: block;
    margin: 0 auto 15px;
}

.help-text {
    font-size: 0.9em;
    color: #7f8c8d;
    margin: 15px 0;
}

.csv-preview {
    margin-top: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.csv-preview table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    margin-top: 10px;
}

.csv-preview th,
.csv-preview td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.csv-preview th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

/* Preview Section */
.preview-section h2,
.results-section h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.5em;
}

#previewContent {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.preview-item {
    background: white;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 10px;
    border-left: 4px solid var(--secondary-color);
}

.preview-item .label {
    font-weight: 600;
    color: var(--primary-color);
    display: inline-block;
    width: 140px;
}

.preview-item .value {
    color: #555;
}

.preview-actions,
.action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.preview-actions button {
    flex: 1;
}

/* Results Section */
#resultsList {
    margin-bottom: 20px;
}

.result-item {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 10px;
    border-left: 4px solid;
}

.result-item.success {
    background: #d4edda;
    border-left-color: var(--success-color);
}

.result-item.error {
    background: #f8d7da;
    border-left-color: var(--danger-color);
}

.result-item.warning {
    background: #fff3cd;
    border-left-color: var(--warning-color);
}

.result-icon {
    font-weight: 600;
    margin-right: 10px;
}

/* Status Bar */
.status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--primary-color);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    z-index: 1000;
}

.status-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Messages */
.message-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    max-width: 400px;
}

.message {
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.message.success {
    background: var(--success-color);
    color: white;
}

.message.error {
    background: var(--danger-color);
    color: white;
}

.message.warning {
    background: var(--warning-color);
    color: white;
}

.message.info {
    background: var(--secondary-color);
    color: white;
}

/* Groups field */
.groups-field {
    grid-column: 1 / -1;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: 12px 14px;
    background: var(--light-bg);
}

.groups-title {
    display: block;
    font-weight: 600;
    font-size: 0.9em;
    color: var(--text-color);
    margin-bottom: 10px;
}

.groups-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
}

.group-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.95em;
    cursor: pointer;
    user-select: none;
}

.group-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--secondary-color);
}

.no-groups {
    font-size: 0.9em;
    color: #7f8c8d;
    font-style: italic;
}

/* Password wrapper — toggled for non-local auth */
.password-wrapper {
    display: contents;
}

/* Responsive */
@media (max-width: 768px) {
    main {
        padding: 20px;
    }

    header h1 {
        font-size: 1.8em;
    }

    .entry-fields {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }

    .method-buttons {
        flex-direction: column;
    }

    .message-container {
        left: 20px;
        right: 20px;
        max-width: none;
    }
}