/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --bg-color: #ffffff;
    --border-color: #e5e7eb;
    --hover-bg: #f3f4f6;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.mobile-only {
    display: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
}

/* 导航栏 */
.navbar {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: 0.3s;
}

/* 首页样式 */
.hero {
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 1rem;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.hero p {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    text-decoration: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background 0.3s;
}

.cta-button:hover {
    background: var(--secondary-color);
}

.cta-button-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.cta-button-secondary:hover {
    background: rgba(37, 99, 235, 0.08);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.features {
    max-width: 1400px;
    margin: 4rem auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: #6b7280;
}

.feature-card-highlight {
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
    border-color: rgba(37, 99, 235, 0.2);
}

.feature-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.feature-link:hover {
    text-decoration: underline;
}

/* 编辑器样式 */
.editor-container {
    max-width: 1400px;
    margin: 0 auto;
    height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
}

.editor-toolbar {
    padding: 0.75rem 1rem;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.toolbar-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s;
}

.toolbar-btn:hover {
    background: var(--hover-bg);
    border-color: var(--primary-color);
}

.editor-main {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border-color);
    overflow: hidden;
}

.editor-pane, .preview-pane {
    background: var(--bg-color);
    overflow: auto;
}

.editor-pane {
    padding: 1rem;
}

#markdown-input {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
}

.preview-pane {
    padding: 2rem;
}

#preview {
    max-width: 100%;
    word-wrap: break-word;
}

/* Markdown预览样式 */
#preview h1, #preview h2, #preview h3, #preview h4, #preview h5, #preview h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

#preview h1 { font-size: 2rem; }
#preview h2 { font-size: 1.5rem; }
#preview h3 { font-size: 1.25rem; }

#preview p {
    margin-bottom: 1rem;
}

#preview code {
    background: #f3f4f6;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
}

#preview pre {
    background: #1f2937;
    color: #f3f4f6;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

#preview pre code {
    background: none;
    padding: 0;
    color: inherit;
}

#preview blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1rem 0;
    color: #6b7280;
}

#preview ul, #preview ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

#preview a {
    color: var(--primary-color);
    text-decoration: none;
}

#preview a:hover {
    text-decoration: underline;
}

#preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

#preview th, #preview td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

#preview th {
    background: var(--hover-bg);
    font-weight: 600;
}

#preview img {
    max-width: 100%;
    height: auto;
}

/* 高级版页面 */
.advanced-page {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

.advanced-header {
    margin-bottom: 1rem;
}

.advanced-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.advanced-header p {
    color: #6b7280;
    margin-bottom: 0.75rem;
}

.advanced-inline-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    color: #6b7280;
    font-size: 0.95rem;
}

.advanced-inline-meta strong {
    color: var(--text-color);
}

.advanced-editor-container {
    height: auto;
    min-height: calc(100vh - 180px);
}

.advanced-toolbar {
    border-bottom: none;
}

.advanced-stats-bar {
    padding: 0 1rem 0.75rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    color: #6b7280;
    font-size: 0.9rem;
}

.advanced-stats-bar strong {
    color: var(--text-color);
}

.advanced-main {
    min-height: 620px;
}

.advanced-editor-pane,
.advanced-preview-pane {
    overflow: auto;
}

.advanced-textarea {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
}

.advanced-preview {
    max-width: 100%;
    word-wrap: break-word;
}

.advanced-preview h1,
.advanced-preview h2,
.advanced-preview h3,
.advanced-preview h4,
.advanced-preview h5,
.advanced-preview h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.advanced-preview h1 { font-size: 2rem; }
.advanced-preview h2 { font-size: 1.5rem; }
.advanced-preview h3 { font-size: 1.25rem; }

.advanced-preview p {
    margin-bottom: 1rem;
}

.advanced-preview code {
    background: #f3f4f6;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
}

.advanced-preview pre {
    background: #1f2937;
    color: #f3f4f6;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.advanced-preview pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.advanced-preview blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1rem 0;
    color: #6b7280;
}

.advanced-preview ul,
.advanced-preview ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.advanced-preview a {
    color: var(--primary-color);
    text-decoration: none;
}

.advanced-preview a:hover {
    text-decoration: underline;
}

.advanced-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.advanced-preview th,
.advanced-preview td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

.advanced-preview th {
    background: var(--hover-bg);
    font-weight: 600;
}

.advanced-preview img {
    max-width: 100%;
    height: auto;
}

.advanced-panels {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.advanced-panel {
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.panel-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: baseline;
    margin-bottom: 1rem;
}

.panel-head h2 {
    font-size: 1rem;
    color: var(--text-color);
}

.panel-head span {
    color: #6b7280;
    font-size: 0.875rem;
}

.template-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.template-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s;
}

.template-btn:hover,
.template-btn.is-active {
    background: var(--hover-bg);
    border-color: var(--primary-color);
}

.outline-list {
    list-style: none;
}

.outline-empty {
    color: #6b7280;
}

.outline-item button {
    width: 100%;
    border: none;
    background: transparent;
    padding: 0.4rem 0;
    text-align: left;
    color: var(--text-color);
    cursor: pointer;
}

.outline-level-h2 button {
    padding-left: 1rem;
}

.outline-level-h3 button {
    padding-left: 2rem;
    color: #6b7280;
}

.advanced-editor-container.is-focus-mode .advanced-preview-pane,
.advanced-editor-container.is-focus-mode .advanced-panels {
    display: none;
}

.advanced-editor-container.is-focus-mode .advanced-main {
    grid-template-columns: 1fr;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mobile-only {
        display: inline-flex;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-color);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .advanced-page {
        padding: 1rem 0.75rem 2rem;
    }

    .advanced-header h1 {
        font-size: 1.75rem;
    }

    .advanced-inline-meta {
        gap: 0.75rem;
        font-size: 0.875rem;
    }

    .advanced-stats-bar {
        gap: 0.75rem;
    }

    .advanced-panels {
        grid-template-columns: 1fr;
    }

    .advanced-main {
        min-height: auto;
    }

    .advanced-textarea,
    .advanced-preview {
        min-height: 420px;
    }

    .editor-main {
        grid-template-columns: 1fr;
    }

    .preview-pane {
        display: none;
    }

    .preview-pane.mobile-show {
        display: block;
    }

    .editor-pane.mobile-hide {
        display: none;
    }
}