/* ========================================
   泽盛赋能 - Seedance 2.0 视频提示词生成器
   ======================================== */

/* === 设计令牌 === */
:root {
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-card: #1a1a2e;
    --color-bg-card-hover: #222240;
    --color-bg-input: #16162a;
    --color-border: #2a2a4a;
    --color-border-focus: #6c5ce7;
    --color-text-primary: #e8e8f0;
    --color-text-secondary: #9090b0;
    --color-text-muted: #606080;
    --color-accent: #6c5ce7;
    --color-accent-hover: #7d6ff0;
    --color-accent-glow: rgba(108, 92, 231, 0.3);
    --color-success: #00d2a0;
    --color-warning: #ffc107;
    --color-error: #ff4757;
    --color-creative: #6c5ce7;
    --color-commercial: #00cec9;
    --color-industry: #fdcb6e;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--color-accent-glow);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === 基础重置 === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* === 背景动画 === */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(0, 206, 201, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(253, 203, 110, 0.04) 0%, transparent 50%);
    animation: bgPulse 20s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}

/* === 头部导航 === */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 0 2rem;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--color-text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent), #00cec9);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: white;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-badge {
    padding: 4px 12px;
    background: rgba(108, 92, 231, 0.15);
    border: 1px solid rgba(108, 92, 231, 0.3);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 500;
}

.btn-github {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.btn-github:hover {
    background: var(--color-bg-card-hover);
    color: var(--color-text-primary);
    border-color: var(--color-accent);
}

/* === 主容器 === */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 2rem;
    min-height: calc(100vh - 64px);
}

/* === 左侧面板 === */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.panel {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-title .icon {
    font-size: 1rem;
}

.panel-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
    background: var(--color-bg-card);
    border-radius: 10px;
    color: var(--color-text-muted);
}

/* === 分类过滤 === */
.category-filters {
    padding: 0.75rem 1rem;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--color-border);
}

.category-btn {
    padding: 5px 12px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.category-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.category-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

/* === 技能列表 === */
.skills-list {
    max-height: calc(100vh - 340px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.skills-list::-webkit-scrollbar {
    width: 4px;
}

.skills-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 2px;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.85rem 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 1px solid rgba(42, 42, 74, 0.3);
    position: relative;
}

.skill-item:hover {
    background: var(--color-bg-card);
}

.skill-item.active {
    background: rgba(108, 92, 231, 0.1);
    border-left: 3px solid var(--color-accent);
}

.skill-item.active .skill-icon {
    box-shadow: var(--shadow-glow);
}

.skill-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.skill-icon.creative { background: rgba(108, 92, 231, 0.15); }
.skill-icon.commercial { background: rgba(0, 206, 201, 0.15); }
.skill-icon.industry { background: rgba(253, 203, 110, 0.15); }

.skill-info {
    flex: 1;
    min-width: 0;
}

.skill-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 2px;
}

.skill-desc {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.skill-number {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    flex-shrink: 0;
}

/* === 右侧主内容 === */
.content-area {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* === 欢迎区域 === */
.welcome-section {
    text-align: center;
    padding: 4rem 2rem;
}

.welcome-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: block;
}

.welcome-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--color-accent), #00cec9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

.welcome-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* === 工作区 === */
.workspace {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
}

.workspace.active {
    display: flex;
}

/* === 技能信息卡片 === */
.skill-header-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.skill-header-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}

.skill-header-icon.creative { background: linear-gradient(135deg, rgba(108, 92, 231, 0.2), rgba(108, 92, 231, 0.05)); border: 1px solid rgba(108, 92, 231, 0.3); }
.skill-header-icon.commercial { background: linear-gradient(135deg, rgba(0, 206, 201, 0.2), rgba(0, 206, 201, 0.05)); border: 1px solid rgba(0, 206, 201, 0.3); }
.skill-header-icon.industry { background: linear-gradient(135deg, rgba(253, 203, 110, 0.2), rgba(253, 203, 110, 0.05)); border: 1px solid rgba(253, 203, 110, 0.3); }

.skill-header-info {
    flex: 1;
}

.skill-header-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.skill-header-desc {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.skill-header-tags {
    display: flex;
    gap: 6px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.skill-tag {
    padding: 2px 10px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* === 输入区域 === */
.input-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.input-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.input-title {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-body {
    padding: 1.25rem;
}

.prompt-textarea {
    width: 100%;
    min-height: 140px;
    padding: 1rem;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition-fast);
    outline: none;
}

.prompt-textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

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

.input-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
}

.char-count {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.btn-generate {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 28px;
    background: linear-gradient(135deg, var(--color-accent), #5a4bd1);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-generate:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-generate:active:not(:disabled) {
    transform: translateY(0);
}

.btn-generate:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-generate .spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-generate.loading .spinner {
    display: block;
}

.btn-generate.loading .btn-text {
    display: none;
}

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

/* === 输出区域 === */
.output-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: none;
}

.output-section.active {
    display: block;
}

.output-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.output-title {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.btn-action {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-action:hover {
    background: var(--color-bg-card-hover);
    color: var(--color-text-primary);
    border-color: var(--color-accent);
}

.btn-action.copied {
    background: rgba(0, 210, 160, 0.1);
    border-color: var(--color-success);
    color: var(--color-success);
}

.output-body {
    padding: 1.25rem;
}

.output-content {
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--color-text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 600px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.output-content::-webkit-scrollbar {
    width: 4px;
}

.output-content::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 2px;
}

.output-meta {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.meta-item {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.meta-item span {
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* === 快捷示例 === */
.quick-examples {
    padding: 0 1.25rem 1.25rem;
}

.examples-title {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.example-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.example-chip {
    padding: 6px 14px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.78rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.example-chip:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(108, 92, 231, 0.08);
}

/* === 历史记录 === */
.history-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: none;
}

.history-section.active {
    display: block;
}

.history-list {
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid rgba(42, 42, 74, 0.3);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.history-item:hover {
    background: var(--color-bg-card);
}

.history-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.history-info {
    flex: 1;
    min-width: 0;
}

.history-prompt {
    font-size: 0.82rem;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-time {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* === 页脚 === */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--color-border);
    margin-top: 2rem;
}

.footer a {
    color: var(--color-accent);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* === Toast 通知 === */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 0.85rem;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.success { border-left: 3px solid var(--color-success); }
.toast.error { border-left: 3px solid var(--color-error); }
.toast.info { border-left: 3px solid var(--color-accent); }

@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* === 加载骨架屏 === */
.skeleton {
    background: linear-gradient(90deg, var(--color-bg-card) 25%, var(--color-bg-card-hover) 50%, var(--color-bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .sidebar {
        order: -1;
    }
    
    .skills-list {
        max-height: 300px;
    }
    
    .welcome-stats {
        gap: 1.5rem;
    }
}

@media (max-width: 640px) {
    .header {
        padding: 0 1rem;
    }
    
    .header-inner {
        height: 56px;
    }
    
    .logo-subtitle {
        display: none;
    }
    
    .header-badge {
        display: none;
    }
    
    .main-container {
        padding: 0.75rem;
        gap: 1rem;
    }
    
    .skill-header-card {
        flex-direction: column;
        text-align: center;
    }
    
    .skill-header-tags {
        justify-content: center;
    }
    
    .welcome-title {
        font-size: 1.5rem;
    }
    
    .welcome-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .output-actions {
        flex-wrap: wrap;
    }
    
    .input-footer {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .btn-generate {
        justify-content: center;
    }
}

/* === 滚动条全局 === */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* === 选中文本 === */
::selection {
    background: rgba(108, 92, 231, 0.3);
    color: white;
}

/* === 流式输出光标 === */
.output-content.streaming::after {
    content: '|';
    animation: blink 0.8s step-end infinite;
    color: var(--color-accent);
    font-weight: bold;
}

@keyframes blink {
    50% { opacity: 0; }
}