/* 防止页面水平溢出 */
html, body {
    overflow-x: hidden;
    max-width: 100%;
}

* {
    box-sizing: border-box;
}

/* 覆盖默认container样式，适配三栏布局 */
.container {
    width: 95%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    background: transparent;
    box-shadow: none;
    border-radius: 0;
}

.hd-qr-container {
    display: flex;
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
}

.controls-panel {
    flex: 0 0 320px;
    background: #fff;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    height: fit-content;
}

.preview-panel {
    flex: 1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    min-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.info-panel {
    flex: 0 0 280px;
    background: #fff;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    height: fit-content;
}

.panel-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 25px;
    color: #0078d4;
    border-bottom: 3px solid #0078d4;
    padding-bottom: 10px;
    text-align: center;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e5e9;
    border-radius: 6px;
    background-color: #fff;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #0078d4;
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

.color-input {
    height: 45px;
    padding: 5px;
    cursor: pointer;
}

.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 12px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, #0078d4 0%, #005a9e 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #005a9e 0%, #004578 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 120, 212, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(135deg, #20c997 0%, #17a2b8 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.preview-container {
    position: relative;
    background-color: #ffffff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    max-width: 500px;
    width: 100%;
    text-align: center;
}

.qr-preview {
    width: 350px;
    height: 350px;
    border: 3px solid #e1e5e9;
    border-radius: 8px;
    display: none;
    margin: 0 auto;
    background-color: #f8f9fa;
}

.preview-placeholder {
    width: 350px;
    height: 350px;
    border: 3px dashed #0078d4;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    background-color: rgba(255, 255, 255, 0.9);
    color: #666;
    font-size: 18px;
    font-weight: 500;
}

.loading-indicator {
    display: none;
    color: #0078d4;
    font-size: 18px;
    font-weight: 600;
    margin: 20px 0;
}

.loading-indicator::after {
    content: '';
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

.info-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    border-left: 4px solid #0078d4;
}

.info-card h4 {
    margin: 0 0 10px 0;
    color: #0078d4;
    font-size: 16px;
}

.info-card p {
    margin: 0;
    color: #6c757d;
    font-size: 13px;
    line-height: 1.5;
}

.version-info {
    background: #e3f2fd;
    border-left-color: #2196f3;
}

.member-notice {
    background: #fff3cd;
    border-left-color: #ffc107;
    margin-top: 20px;
}

.member-notice h4 {
    color: #856404;
}

.capacity-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    margin-top: 10px;
}

.capacity-table th,
.capacity-table td {
    border: 1px solid #dee2e6;
    padding: 4px 6px;
    text-align: center;
}

.capacity-table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.member-status {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    font-size: 14px;
    margin-bottom: 20px;
}

@media (max-width: 1200px) {
    .hd-qr-container {
        flex-direction: column;
        gap: 15px;
    }

    .controls-panel,
    .preview-panel,
    .info-panel {
        flex: none;
        width: 100%;
        max-width: 100%;
    }

    .container {
        width: 95%;
        padding: 15px;
    }
}

@media (max-width: 768px) {
    .container {
        width: 100%;
        padding: 12px;
    }

    .hd-qr-container {
        gap: 12px;
    }

    .controls-panel,
    .preview-panel,
    .info-panel {
        padding: 18px;
        border-radius: 12px;
    }

    .panel-title {
        font-size: 18px;
        margin-bottom: 20px;
    }

    .form-control {
        font-size: 16px;
    }

    .qr-preview, .preview-placeholder {
        width: 280px;
        height: 280px;
    }
}

@media (max-width: 480px) {
    .container {
        width: 100%;
        padding: 8px;
    }

    .hd-qr-container {
        gap: 10px;
    }

    .controls-panel,
    .preview-panel,
    .info-panel {
        padding: 15px;
        border-radius: 10px;
    }

    .panel-title {
        font-size: 16px;
        margin-bottom: 15px;
    }

    .form-group {
        margin-bottom: 15px;
    }

    .form-control {
        padding: 10px;
        font-size: 16px;
    }

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

    .qr-preview, .preview-placeholder {
        width: 200px;
        height: 200px;
    }
}