/* ========================================
   抖音风格文字生成器样式
   严格遵循开发规范，不重复定义 info-card
   ======================================== */

/* ========== 主布局 ========== */
.douyin-generator-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

/* ========== 左侧控制面板 ========== */
.control-panel {
    background: #ffffff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    height: fit-content;
}

.control-panel h3 {
    margin: 0 0 20px 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-panel h3 i {
    color: #667eea;
}

/* ========== 表单控件 ========== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #555;
}

.form-group label i {
    margin-right: 5px;
    color: #667eea;
    width: 16px;
    text-align: center;
}

.form-input,
.form-select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s;
    box-sizing: border-box;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-help {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: #999;
}

/* ========== 滑块样式 ========== */
.slider-with-value {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, #667eea 0%, #764ba2 100%);
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    border: 3px solid #667eea;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.2s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.3);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    border: 3px solid #667eea;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.2s;
}

.slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.3);
}

.slider-value {
    min-width: 50px;
    text-align: right;
    font-size: 14px;
    font-weight: 600;
    color: #667eea;
}

/* ========== 按钮组 ========== */
.button-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.btn-option {
    padding: 10px 16px;
    border: 2px solid #ddd;
    border-radius: 8px;
    background: #ffffff;
    color: #666;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-option:hover {
    border-color: #667eea;
    color: #667eea;
    transform: translateY(-2px);
}

.btn-option.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: #ffffff;
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

/* ========== 小标签页按钮 ========== */
.tab-buttons-small {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.tab-btn-small {
    padding: 8px 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    background: #ffffff;
    color: #666;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn-small:hover {
    border-color: #667eea;
    color: #667eea;
}

.tab-btn-small.active {
    background: #667eea;
    border-color: #667eea;
    color: #ffffff;
}

/* ========== 背景选项 ========== */
.bg-options {
    margin-top: 12px;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.color-option {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 8px;
    cursor: pointer;
    border: 3px solid transparent;
    transition: all 0.3s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.color-option:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.color-option.active {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

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

.custom-color-picker label {
    font-size: 13px;
    color: #666;
    margin: 0;
}

#custom-color {
    width: 60px;
    height: 36px;
    border: 2px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

#custom-color:hover {
    border-color: #667eea;
}

/* ========== 右侧预览面板 ========== */
.preview-panel {
    background: #ffffff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.preview-panel h3 {
    margin: 0 0 20px 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-panel h3 i {
    color: #667eea;
}

/* ========== Canvas容器 ========== */
.canvas-container {
    position: relative;
    width: 100%;
    background: #f5f5f5;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.1);
}

#preview-canvas {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
}

/* ========== 加载遮罩层 ========== */
#loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 10;
}

#loading-overlay.show {
    display: flex;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

#loading-text {
    color: #ffffff;
    font-size: 16px;
    margin-top: 20px;
    font-weight: 500;
}

#loading-progress {
    color: #ffffff;
    font-size: 24px;
    font-weight: 700;
    margin-top: 10px;
}

/* ========== 操作按钮 ========== */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.btn-primary,
.btn-secondary {
    padding: 14px 24px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.5);
}

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

.btn-secondary {
    background: #ffffff;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

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

/* ========== 响应式设计 ========== */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .douyin-generator-layout {
        grid-template-columns: 320px 1fr;
        gap: 20px;
    }

    .control-panel,
    .preview-panel {
        padding: 20px;
    }

    .control-panel h3,
    .preview-panel h3 {
        font-size: 16px;
    }
}

/* 手机设备 (< 768px) */
@media (max-width: 768px) {
    .douyin-generator-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .control-panel {
        order: 2; /* 移动端先显示预览，后显示控制 */
    }

    .preview-panel {
        order: 1;
    }

    .control-panel,
    .preview-panel {
        padding: 18px;
    }

    .form-group {
        margin-bottom: 18px;
    }

    .button-group {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .btn-option {
        padding: 8px 12px;
        font-size: 13px;
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 12px 20px;
        font-size: 14px;
    }

    .color-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }
}

/* 超小屏幕 (< 480px) */
@media (max-width: 480px) {
    .control-panel,
    .preview-panel {
        padding: 15px;
    }

    .control-panel h3,
    .preview-panel h3 {
        font-size: 15px;
        margin-bottom: 15px;
    }

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

    .form-group label {
        font-size: 13px;
    }

    .form-input,
    .form-select {
        font-size: 13px;
        padding: 8px 10px;
    }

    .slider-value {
        font-size: 13px;
    }

    .button-group {
        grid-template-columns: 1fr 1fr;
    }

    .color-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 6px;
    }
}