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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

/* 移动端适配 */
@media (max-width: 768px) {
    body {
        padding: 10px;
        font-size: 14px;
    }

    .container {
        border-radius: 15px;
        margin: 0;
    }
}

.header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 300;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    position: relative;
    z-index: 1;
}

.header p {
    font-size: 1.1em;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .header {
        padding: 20px 15px;
    }

    .header h1 {
        font-size: 1.8em;
        margin-bottom: 8px;
    }

    .header p {
        font-size: 0.95em;
    }
}

.connection-panel {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    padding: 20px;
    margin: 20px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.connection-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
    min-height: 44px; /* 确保触摸友好的最小高度 */
}

@media (max-width: 768px) {
    .connection-panel {
        margin: 15px;
        padding: 15px;
    }

    .connection-buttons {
        gap: 10px;
        flex-direction: column;
    }

    .btn {
        padding: 15px 20px;
        font-size: 16px;
        min-height: 50px;
        width: 100%;
        border-radius: 12px;
    }
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

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

.btn-success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.btn-info {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.tabs {
    display: flex;
    background: #f8f9fa;
    margin: 20px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.tab {
    flex: 1;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: none;
    font-size: 16px;
    font-weight: 500;
    color: #1976d2;
    transition: all 0.3s ease;
    position: relative;
    min-height: 44px;
}

@media (max-width: 768px) {
    .tabs {
        margin: 15px;
        flex-direction: column;
        border-radius: 12px;
    }

    .tab {
        padding: 15px;
        font-size: 15px;
        min-height: 50px;
        border-right: none !important;
    }

    .tab:not(:last-child) {
        border-bottom: 1px solid rgba(255,255,255,0.3);
    }

    .tab.active {
        transform: none;
        border-radius: 0;
    }
}

.tab:not(:last-child) {
    border-right: 1px solid rgba(255,255,255,0.3);
}

.tab.active {
    background: linear-gradient(135deg, #1976d2 0%, #42a5f5 100%);
    color: white;
    transform: scale(1.05);
    z-index: 2;
    box-shadow: 0 4px 15px rgba(25, 118, 210, 0.4);
}

.tab:hover:not(.active) {
    background: linear-gradient(135deg, #bbdefb 0%, #90caf9 100%);
    transform: translateY(-2px);
}

.content {
    display: none;
    padding: 30px;
    animation: fadeIn 0.5s ease-in-out;
}

.content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.card-title {
    font-size: 1.3em;
    font-weight: 600;
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #e3f2fd;
    padding-bottom: 10px;
}

@media (max-width: 768px) {
    .content {
        padding: 20px 15px;
    }

    .card {
        padding: 20px;
        margin-bottom: 15px;
        border-radius: 12px;
    }

    .card:hover {
        transform: none;
    }

    .card-title {
        font-size: 1.2em;
        margin-bottom: 15px;
    }
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: #fafbfc;
}

.form-control:focus {
    outline: none;
    border-color: #4facfe;
    background: white;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

.form-control-inline {
    display: inline-block;
    width: auto;
    margin-right: 10px;
}

.button-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

@media (max-width: 768px) {
    .form-control {
        padding: 15px 16px;
        font-size: 16px; /* 防止iOS缩放 */
        border-radius: 8px;
    }

    .form-control-inline {
        width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }

    .button-group {
        flex-direction: column;
        gap: 8px;
    }

    .button-group .btn {
        width: 100%;
        margin: 0;
    }
}

.canvas-container {
    position: relative;
    display: inline-block;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

#canvas {
    border: 3px solid #4facfe;
    border-radius: 10px;
    background: white;
}

#edit-font {
    max-width: 296px;
    position: absolute;
    border: 2px solid #4facfe;
    background-color: rgba(255, 255, 255, 0.9);
    display: none;
    overflow: auto;
    border-radius: 5px;
    padding: 5px;
    backdrop-filter: blur(5px);
}

.log-container {
    margin: 20px;
    background: #2c3e50;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.log-header {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
    color: white;
    padding: 15px 20px;
    font-weight: 600;
}

#log {
    width: 100%;
    background: #1a252f;
    color: #00ff00;
    border: none;
    padding: 20px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 12px;
    resize: vertical;
    min-height: 200px;
}

@media (max-width: 768px) {
    .canvas-container {
        width: 100%;
        max-width: 100%;
        border-radius: 8px;
    }

    #canvas {
        width: 100%;
        max-width: 100%;
        height: auto;
        border-width: 2px;
        border-radius: 8px;
    }

    #edit-font {
        max-width: 90%;
        border-radius: 8px;
    }

    .log-container {
        margin: 15px;
        border-radius: 12px;
    }

    .log-header {
        padding: 12px 15px;
        font-size: 14px;
    }

    #log {
        padding: 15px;
        font-size: 11px;
        min-height: 150px;
    }
}

.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #e74c3c;
    margin-right: 8px;
    animation: pulse 2s infinite;
}

.status-indicator.connected {
    background: #27ae60;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* 表格响应式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

td, th {
    padding: 12px 8px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

@media (max-width: 768px) {
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    /* 表格在移动端的处理 */
    table {
        font-size: 14px;
    }

    td, th {
        padding: 10px 6px;
        font-size: 13px;
    }

    /* 让表格可以横向滚动 */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* 工具提示在移动端的优化 */
    .tooltip::after {
        font-size: 11px;
        padding: 6px 10px;
    }
}

.icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-right: 8px;
    vertical-align: middle;
}

.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* 移动端额外优化 */
@media (max-width: 480px) {
    body {
        padding: 5px;
    }

    .header h1 {
        font-size: 1.5em;
    }

    .btn {
        font-size: 15px;
        padding: 12px 16px;
    }
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#charCount {
    font-size: 14px;
    color: gray;
}