/* ========================================
   问卷助手 - 公共样式
   ======================================== */

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

:root {
    --primary: #1677ff;
    --primary-dark: #0958d9;
    --success: #52c41a;
    --warning: #faad14;
    --danger: #ff4d4f;
    --text: #333;
    --text-secondary: #666;
    --text-light: #999;
    --border: #e8e8e8;
    --bg: #f5f5f5;
    --bg-white: #fff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

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

/* ========================================
   Header
   ======================================== */

.header {
    background: var(--bg-white);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 20px;
    font-weight: bold;
    color: var(--text);
}

.nav {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(22, 119, 255, 0.1);
}

/* ========================================
   Main Content
   ======================================== */

.main {
    min-height: calc(100vh - 120px);
    padding: 30px 0;
}

/* ========================================
   Feature Cards
   ======================================== */

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

.feature-card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(22, 119, 255, 0.15);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========================================
   Cards
   ======================================== */

.card {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 18px;
}

.card-body {
    padding: 24px;
}

/* ========================================
   Forms
   ======================================== */

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.1);
}

.form-group input[type="number"] {
    -moz-appearance: textfield;
}

.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.required {
    color: var(--danger);
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-light);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.ratio-inputs {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.ratio-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ratio-item input {
    width: 80px !important;
}

.ratio-total {
    margin-top: 12px;
    padding: 8px 12px;
    background: #f0f5ff;
    border-radius: 6px;
    font-weight: 500;
    color: var(--primary);
}

.radio-group {
    display: flex;
    gap: 24px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-actions {
    margin-top: 30px;
    text-align: center;
}

/* ========================================
   File Upload
   ======================================== */

.file-upload {
    position: relative;
}

.file-upload-area {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload-area:hover {
    border-color: var(--primary);
    background: rgba(22, 119, 255, 0.05);
}

.file-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 16px;
}

.file-hint {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-light);
}

.file-info {
    padding: 20px;
    background: #fafafa;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.file-name {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
}

.file-size {
    color: var(--text-secondary);
    font-size: 14px;
}

.file-preview {
    display: block;
    margin-top: 12px;
    font-size: 13px;
    color: var(--primary);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: #f0f0f0;
    color: var(--text);
}

.btn-secondary:hover {
    background: #e0e0e0;
}

.btn-text {
    background: none;
    color: var(--primary);
    padding: 8px 12px;
}

.btn-text:hover {
    background: rgba(22, 119, 255, 0.1);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ========================================
   Search Box
   ======================================== */

.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 14px 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
}

/* ========================================
   Status & Progress
   ======================================== */

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-pending {
    background: #fffbe6;
    color: #d48806;
}

.status-running {
    background: #e6f7ff;
    color: var(--primary);
}

.status-completed {
    background: #f6ffed;
    color: var(--success);
}

.status-failed {
    background: #fff1f0;
    color: var(--danger);
}

.status-cancelled {
    background: #f5f5f5;
    color: var(--text-light);
}

.progress-bar {
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
    margin: 8px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    transition: width 0.5s ease;
}

/* ========================================
   Result Display
   ======================================== */

.result-item {
    padding: 16px;
    background: #fafafa;
    border-radius: 8px;
    margin-bottom: 12px;
}

.result-label {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 4px;
}

.result-value {
    font-weight: 500;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

/* ========================================
   Success Page
   ======================================== */

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

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success);
    color: #fff;
    font-size: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.success-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 24px;
}

/* ========================================
   Tutorial
   ======================================== */

.tutorial h3 {
    margin: 24px 0 12px;
    color: var(--primary);
}

.tutorial ol, .tutorial ul {
    padding-left: 24px;
    margin: 12px 0;
}

.tutorial li {
    margin-bottom: 8px;
}

.tutorial dt {
    font-weight: 500;
    margin-top: 16px;
}

.tutorial dd {
    margin-left: 0;
    color: var(--text-secondary);
}

/* ========================================
   Toast
   ======================================== */

.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    z-index: 9999;
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--bg-white);
    padding: 20px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    border-top: 1px solid var(--border);
}

/* ========================================
   Utilities
   ======================================== */

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

.hidden {
    display: none !important;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 20px;
    }
    
    .nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        padding-top: 12px;
    }
    
    .features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .feature-icon {
        font-size: 36px;
    }
    
    .ratio-inputs {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .admin-layout {
        flex-direction: column;
    }
    
    .admin-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

@media (max-width: 480px) {
    .features {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .success-actions {
        flex-direction: column;
    }
}