/* ============================================
   App Store 宣传图生成器 - 样式表
   ============================================ */

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

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a35;
    --bg-tertiary: #252545;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --shadow: rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

body {
    font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 主容器布局 */
.app-container {
    display: flex;
    min-height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
}

/* ============================================
   左侧控制面板
   ============================================ */
.sidebar {
    width: 360px;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    max-height: 100vh;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.sidebar-header {
    padding: 24px 20px;
    background: linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.sidebar-header p {
    font-size: 12px;
    opacity: 0.85;
}

/* 面板区块 */
.panel-section {
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.panel-section:last-child {
    border-bottom: none;
}

.panel-section h2 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.section-header h2 {
    margin-bottom: 0;
}

.toggle-btn {
    font-size: 11px;
    padding: 5px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.toggle-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* 模板分组 */
.template-group {
    margin-bottom: 14px;
}

.template-group:last-child {
    margin-bottom: 0;
}

.group-label {
    display: block;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.template-row {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.template-row:last-child {
    margin-bottom: 0;
}

.template-btn {
    flex: 1;
    max-width: 100px;
    padding: 0;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    overflow: hidden;
}

.template-btn:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.template-btn.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.template-preview {
    display: block;
    height: 45px;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.template-label {
    display: block;
    padding: 6px 4px;
    font-size: 9px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.template-btn.active .template-label {
    color: var(--accent-light);
}

/* 设备方向选择 */
.orientation-group {
    display: flex;
    gap: 10px;
}

.orientation-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
}

.orientation-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}

.orientation-btn.active {
    border-color: var(--accent);
    color: var(--accent-light);
    background: rgba(99, 102, 241, 0.1);
}

.orientation-btn svg {
    width: auto;
    height: 28px;
}

.orientation-btn span {
    font-size: 10px;
    font-weight: 600;
}

/* 上传区域 */
.upload-zone {
    border: 2px dashed var(--border-hover);
    border-radius: var(--radius-md);
    padding: 28px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-tertiary);
}

.upload-zone:hover {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
}

.upload-zone.drag-over {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
}

.upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.upload-icon {
    font-size: 32px;
}

.upload-text {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-hint {
    font-size: 11px;
    color: var(--text-muted);
}

/* 已上传预览 */
.uploaded-preview {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.uploaded-preview img {
    width: 100%;
    max-height: 200px;
    object-fit: contain;
    display: block;
}

.remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.remove-btn:hover {
    background: #ef4444;
    transform: scale(1.1);
}

/* 输入框 */
.input-field {
    position: relative;
}

.input-field label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.input-field textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    transition: all 0.2s ease;
}

.input-field textarea::placeholder {
    color: var(--text-muted);
}

.input-field textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.char-counter {
    position: absolute;
    bottom: 8px;
    right: 10px;
    font-size: 10px;
    color: var(--text-muted);
}

.char-counter span {
    color: var(--text-secondary);
    font-weight: 600;
}

/* 设置面板 */
.settings-panel {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.setting-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.setting-row label {
    flex: 0 0 70px;
    font-size: 12px;
    color: var(--text-secondary);
}

.setting-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

.setting-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow);
    transition: transform 0.15s ease;
}

.setting-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.setting-row span {
    flex: 0 0 45px;
    text-align: right;
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-light);
}

.settings-hint {
    margin-top: 10px;
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
}

/* 导出区域 */
.export-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.export-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.export-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

.export-specs {
    margin-top: 14px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.spec {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
}

.spec-label {
    font-size: 11px;
    color: var(--text-muted);
}

.spec-value {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ============================================
   右侧画布区域
   ============================================ */
.canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-primary);
    max-height: 100vh;
}

.canvas-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.toolbar-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.toolbar-actions {
    display: flex;
    gap: 8px;
}

.tool-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    transform: rotate(15deg);
}

.canvas-viewport {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    min-height: 0;
    padding: 20px;
}

#mainCanvas {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px var(--shadow);
}

.canvas-tip {
    margin-top: 12px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1000px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        max-height: none;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .canvas-area {
        min-height: 600px;
        max-height: none;
    }
}