/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary-color: #4a6cf7;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

body {
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 卡片样式 */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.12);
}

/* 头部样式 */
.header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 2.2rem;
}

.nav {
    display: flex;
    gap: 2px;
    background: var(--gray-100);
    padding: 4px;
    border-radius: 10px;
}

.nav-item {
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-item:hover {
    background: var(--white);
    color: var(--primary-color);
}

.nav-item.active {
    background: var(--primary-color);
    color: var(--white);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.balance {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--gray-100);
    border-radius: 8px;
    font-weight: 500;
}

.balance i {
    color: var(--warning-color);
}

.btn-recharge {
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary-color), #6a82fb);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-recharge:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
}

/* 主要内容区域 */
.main {
    flex: 1;
    padding: 30px 0;
}

.main .container {
    display: flex;
    gap: 30px;
}

.left-panel {
    flex: 1;
    min-width: 0;
}

.right-panel {
    width: 400px;
    flex-shrink: 0;
}

/* 输入区域 */
.input-section h2 {
    margin-bottom: 20px;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.link-input {
    flex: 1;
    padding: 14px 18px;
    border: 2px solid var(--gray-300);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
}

.link-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.1);
}

.btn-primary {
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--primary-color), #6a82fb);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 108, 247, 0.3);
}

/* 快捷按钮 */
.quick-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.quick-btn {
    padding: 10px 16px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    color: var(--gray-700);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.quick-btn:hover {
    background: var(--gray-200);
    transform: translateY(-1px);
}

/* 设置区域 */
.settings-section {
    border-top: 1px solid var(--gray-200);
    padding-top: 16px;
    margin-top: 16px;
}

.settings-section h3 {
    margin-bottom: 12px;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.setting-row-inline {
    display: flex;
    gap: 20px;
    margin-bottom: 12px;
}

.setting-inline-item {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
}

.setting-inline-item label {
    min-width: 70px;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.9rem;
    white-space: nowrap;
}

.setting-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

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

.setting-row label {
    min-width: 100px;
    font-weight: 500;
    color: var(--gray-700);
}

input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--gray-300);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

input[type="color"] {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    padding: 0;
}

.color-value {
    font-family: monospace;
    background: var(--gray-100);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
}

select {
    padding: 8px 16px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    background: var(--white);
    color: var(--gray-800);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Logo上传 */
.logo-upload {
    display: flex;
    align-items: center;
    gap: 12px;
}

.upload-btn {
    padding: 10px 20px;
    background: var(--gray-100);
    border: 2px dashed var(--gray-400);
    border-radius: 8px;
    color: var(--gray-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.upload-btn:hover {
    background: var(--gray-200);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-remove {
    width: 36px;
    height: 36px;
    background: var(--danger-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-remove:hover {
    transform: scale(1.1);
}

.btn-save-logo {
    width: 36px;
    height: 36px;
    background: var(--warning-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 0.8rem;
}

.btn-save-logo:hover {
    transform: scale(1.1);
}

/* Logo库 */
.logo-library {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--gray-200);
}

.logo-library-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.95rem;
}

.logo-library-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.logo-library-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--gray-100);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    max-width: 200px;
}

.logo-library-item:hover {
    background: var(--gray-200);
}

.logo-library-item.active {
    border-color: var(--primary-color);
    background: rgba(74, 108, 247, 0.08);
}

.logo-thumb {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    object-fit: contain;
    flex-shrink: 0;
    background: var(--white);
}

.logo-name {
    font-size: 0.85rem;
    color: var(--gray-700);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.logo-delete-btn {
    width: 20px;
    height: 20px;
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    opacity: 0;
    transition: var(--transition);
    flex-shrink: 0;
}

.logo-library-item:hover .logo-delete-btn {
    opacity: 1;
}

.logo-delete-btn:hover {
    color: var(--danger-color);
}

/* Logo大小档位 */
.logo-size-options {
    display: flex;
    gap: 6px;
}

.size-btn {
    padding: 5px 16px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    background: var(--white);
    color: var(--gray-600);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.size-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.size-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

/* 历史记录 */
.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.history-header h2 {
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-clear-all {
    padding: 6px 14px;
    background: none;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.btn-clear-all:hover {
    background: var(--danger-color);
    color: var(--white);
}

.history-list {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 10px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--gray-50);
    border-radius: 10px;
    margin-bottom: 10px;
    transition: var(--transition);
}

.history-item:hover {
    background: var(--gray-100);
    transform: translateX(5px);
}

.history-preview {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
}

.history-qr {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    object-fit: cover;
}

.history-info {
    flex: 1;
    min-width: 0;
}

.history-link {
    font-weight: 500;
    color: var(--gray-800);
    margin-bottom: 4px;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.history-time {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.history-actions {
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: var(--transition);
}

.history-item:hover .history-actions {
    opacity: 1;
}

.btn-icon {
    width: 36px;
    height: 36px;
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    color: var(--gray-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.empty-history {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-500);
}

.empty-history i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* 预览区域 */
.preview-section h2 {
    margin-bottom: 20px;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.preview-container {
    background: var(--gray-50);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qr-preview {
    position: relative;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto 25px;
    background: var(--white);
    border-radius: 8px;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

#qrCanvas {
    display: block;
    border-radius: 4px;
}

.logo-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.logo-overlay img {
    object-fit: contain;
}

.preview-info {
    background: var(--white);
    border-radius: 10px;
    padding: 20px;
    width: 100%;
}

.info-row {
    display: flex;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-100);
}

.info-row:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.info-label {
    min-width: 100px;
    font-weight: 500;
    color: var(--gray-700);
}

.info-value {
    flex: 1;
    color: var(--gray-800);
    word-break: break-all;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
}

.btn-download, .btn-share, .btn-copy, .btn-reset {
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
}

.btn-download {
    background: linear-gradient(135deg, var(--success-color), #20c997);
    color: var(--white);
}

.btn-share {
    background: linear-gradient(135deg, var(--info-color), #0dcaf0);
    color: var(--white);
}

.btn-copy {
    background: linear-gradient(135deg, var(--warning-color), #ffda6a);
    color: var(--white);
}

.btn-reset {
    background: linear-gradient(135deg, var(--gray-600), #6c757d);
    color: var(--white);
}

.btn-download:hover, .btn-share:hover, .btn-copy:hover, .btn-reset:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 主题设置 */
.theme-section {
    border-top: 1px solid var(--gray-200);
    padding-top: 20px;
    margin-top: 20px;
}

.theme-section h3 {
    margin-bottom: 15px;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-options {
    display: flex;
    gap: 10px;
}

.theme-btn {
    flex: 1;
    padding: 12px;
    background: var(--gray-100);
    border: 2px solid transparent;
    border-radius: 8px;
    color: var(--gray-700);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.theme-btn:hover {
    background: var(--gray-200);
}

.theme-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* 使用说明 */
.instructions-section h2 {
    margin-bottom: 20px;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.instructions-list {
    padding-left: 20px;
}

.instructions-list li {
    margin-bottom: 12px;
    padding-left: 10px;
    color: var(--gray-700);
}

.instructions-list li:last-child {
    margin-bottom: 0;
}

/* 页脚 */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 30px 0;
    margin-top: auto;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 25px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .main .container {
        flex-direction: column;
    }
    
    .right-panel {
        width: 100%;
    }
    
    .qr-preview {
        width: 250px;
        height: 250px;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav {
        width: 100%;
        overflow-x: auto;
        padding: 4px;
        justify-content: center;
    }
    
    .nav-item {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    .user-info {
        width: 100%;
        justify-content: space-between;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
    
    .setting-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .setting-row label {
        min-width: auto;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .footer .container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .qr-preview {
        width: 200px;
        height: 200px;
    }
    
    .quick-buttons {
        justify-content: center;
    }
}

/* 主题变量 */
body.light-theme {
    --primary-color: #4a6cf7;
    --background-color: #f8f9fa;
    --text-color: #212529;
}

body.dark-theme {
    --primary-color: #6a82fb;
    --background-color: #1a1a2e;
    --text-color: #e9ecef;
    --white: #16213e;
    --gray-100: #2d3748;
    --gray-200: #4a5568;
    --gray-300: #718096;
    --gray-800: #e2e8f0;
    background-color: var(--background-color);
    color: var(--text-color);
}

body.blue-theme {
    --primary-color: #2196f3;
    --background-color: #e3f2fd;
    --text-color: #1565c0;
    --white: #ffffff;
    --gray-100: #bbdefb;
    --gray-800: #0d47a1;
    background-color: var(--background-color);
    color: var(--text-color);
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease-out;
}

@keyspin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn-primary:active .icon {
    animation: spin 0.5s linear;
}