:root {
    --primary-color: #4a89dc;
    --secondary-color: #5d9cec;
    --accent-color: #3bafda;
    --background-color: #f5f7fa;
    --card-color: #ffffff;
    --text-color: #434a54;
    --border-radius: 10px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    padding-bottom: 100px;
}

.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.main-container {
    margin-top: 80px;
    padding: 20px;
}

.section-title {
    font-weight: bold;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
    display: flex;
    align-items: center;
}

.section-title i {
    margin-right: 10px;
    color: var(--accent-color);
}

.card {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    border: none;
    overflow: hidden;
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
    padding: 15px 20px;
}

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

.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #ddd;
    padding: 10px 15px;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(59, 175, 218, 0.25);
}

.btn {
    border-radius: 50px;
    padding: 10px 20px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.qrcode-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

#qrcode {
    margin: 20px 0;
    padding: 10px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.row-custom {
    margin: 0 -10px;
}

.col-custom {
    padding: 0 10px;
}

.tab-content {
    padding: 20px;
}

.nav-tabs .nav-link {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    font-weight: 500;
    padding: 10px 20px;
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-color: #dee2e6 #dee2e6 #fff;
    border-top: 3px solid var(--primary-color);
}

.action-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.preset-item {
    cursor: pointer;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.preset-item:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.preset-item img {
    width: 100%;
    height: 100px;
    object-fit: cover;
}

.preset-item .preset-name {
    padding: 10px;
    text-align: center;
    background-color: white;
    font-size: 12px;
}

.logo-preview {
    max-width: 100px;
    max-height: 100px;
    margin-top: 10px;
    border-radius: 5px;
    display: none;
}

.custom-switch {
    padding-left: 2.25rem;
}

.custom-control-label {
    padding-top: 2px;
}

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 15px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.toast.show {
    opacity: 1;
}

/* 加载指示器 */
.loading-indicator {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 10;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 状态提示 */
.status-indicator {
    margin-top: 10px;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    background-color: #e9ecef;
    color: #495057;
    display: inline-block;
}

.status-indicator.updating {
    background-color: #cce5ff;
    color: #004085;
}

.status-indicator.success {
    background-color: #d4edda;
    color: #155724;
}

.status-indicator.error {
    background-color: #f8d7da;
    color: #721c24;
}

/* 颜色预设 */
.color-presets-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin: 15px 0;
}

.color-preset {
    cursor: pointer;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid #eee;
}

.color-preset:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.preset-color-sample {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
}

.preset-color-name {
    padding: 8px;
    text-align: center;
    font-size: 12px;
    background-color: white;
    border-top: 1px solid #eee;
}