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

body {
    font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f5f7fa;
    color: #2c3e50;
    line-height: 1.6;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 24px;
}

h1 {
    font-size: 28px;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.mode-toggle {
    display: flex;
    gap: 8px;
}

.mode-btn {
    padding: 10px 20px;
    border: 2px solid #e1e8ed;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.mode-btn:hover {
    border-color: #3498db;
    color: #3498db;
}

.mode-btn.active {
    background: #3498db;
    border-color: #3498db;
    color: white;
}

.mode-content {
    display: none;
}

.mode-content.active {
    display: block;
}

.survey-form, .admin-panel {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

h2 {
    font-size: 22px;
    margin-bottom: 24px;
    color: #1a1a1a;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.radio-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 10px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    transition: all 0.2s;
}

.radio-label:hover {
    border-color: #3498db;
    background: #f8fbff;
}

.radio-label input[type="radio"] {
    cursor: pointer;
}

.radio-label input[type="radio"]:checked + span {
    font-weight: 600;
    color: #3498db;
}

.section-divider {
    height: 1px;
    background: #e1e8ed;
    margin: 24px 0;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.submit-btn:hover {
    background: #2980b9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.admin-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    padding: 10px 16px;
    border: 2px solid #e1e8ed;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.action-btn:hover {
    border-color: #3498db;
    color: #3498db;
}

.action-btn.danger:hover {
    border-color: #e74c3c;
    color: #e74c3c;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    border-radius: 12px;
    color: white;
    text-align: center;
}

.stat-card:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-card:nth-child(3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    opacity: 0.9;
}

.data-table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table thead {
    background: #f8f9fa;
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #e1e8ed;
    white-space: nowrap;
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid #e1e8ed;
}

.data-table tbody tr:hover {
    background: #f8fbff;
}

.empty-state {
    text-align: center;
    color: #95a5a6;
    font-style: italic;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.tag.free {
    background: #d4edda;
    color: #155724;
}

.tag.paid {
    background: #fff3cd;
    color: #856404;
}

.tag.none {
    background: #f8d7da;
    color: #721c24;
}

.tag.available {
    background: #d1ecf1;
    color: #0c5460;
}

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #2c3e50;
    color: white;
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    .app-container {
        padding: 12px;
    }

    header, .survey-form, .admin-panel {
        padding: 20px;
    }

    h1 {
        font-size: 22px;
    }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .data-table {
        font-size: 12px;
    }

    .data-table th,
    .data-table td {
        padding: 8px;
    }
}