@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
    --font-family: 'Noto Sans SC', 'Inter', sans-serif;
    --bg-main: #f8f9fa;
    --bg-sidebar: #ffffff;
    --bg-panel: #fdfdfd;
    --bg-editor: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-placeholder: #adb5bd;
    --border-color: #dee2e6;
    --accent-primary: #0d6efd;
    --accent-secondary: #e7f1ff;
    --accent-danger: #dc3545;
    --accent-danger-bg: #f8d7da;
    --highlight-block-bg: #fff9db;
    --highlight-block-border: #ffec99;
    --shadow: rgba(0, 0, 0, 0.05) 0px 6px 24px 0px;
    --status-draft: #6c757d;
    --status-in-progress: #ffc107;
    --status-completed: #198754;
}

body { font-family: var(--font-family); margin: 0; background-color: var(--bg-main); color: var(--text-primary); overflow: hidden; }
.app-container { display: grid; grid-template-columns: 240px 320px 1fr; height: 100vh; }
.hidden { display: none !important; }

.sidebar { background-color: var(--bg-sidebar); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; }
.sidebar-main { flex-grow: 1; display: flex; flex-direction: column; overflow-y: hidden; }
.sidebar-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 15px 0 15px; margin-bottom: 20px; flex-shrink: 0; }
h2 { font-size: 18px; margin: 0; }
.sidebar-action-btn { width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border-color); background-color: #fff; color: var(--text-secondary); font-size: 18px; cursor: pointer; line-height: 26px; text-align: center; transition: background-color 0.2s, color 0.2s; }
.sidebar-action-btn:hover { background-color: #f8f9fa; color: var(--text-primary); }
.search-box { padding: 0 15px; margin-bottom: 20px; flex-shrink: 0; }
#search-input { width: 100%; padding: 8px 12px; border-radius: 6px; border: 1px solid var(--border-color); font-size: 14px; box-sizing: border-box; }
#category-list { list-style: none; padding: 0; margin: 0; overflow-y: auto; flex-grow: 1;}
.category-item { padding: 12px 20px; cursor: pointer; font-size: 15px; font-weight: 500; border-left: 3px solid transparent; transition: background-color 0.2s; color: var(--text-secondary); }
.category-item:hover { background-color: var(--bg-panel); }
.category-item.active { background-color: var(--accent-secondary); border-left-color: var(--accent-primary); color: var(--accent-primary); font-weight: 600; }

.sidebar-footer { flex-shrink: 0; display: flex; gap: 10px; padding: 15px; border-top: 1px solid var(--border-color); }
.footer-action-btn { flex-grow: 1; display: flex; align-items: center; justify-content: center; gap: 8px; padding: 8px 12px; border: 1px solid var(--border-color); background-color: #fff; color: var(--text-secondary); font-size: 14px; font-weight: 500; border-radius: 6px; cursor: pointer; transition: all 0.2s ease; }
.footer-action-btn svg { stroke: var(--text-secondary); transition: stroke 0.2s ease; }
.footer-action-btn:hover { background-color: #f8f9fa; color: var(--text-primary); border-color: #ced4da;}
.footer-action-btn:hover svg { stroke: var(--text-primary); }

.note-list-panel { background-color: var(--bg-panel); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; }
.panel-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; flex-shrink: 0; }
#current-category-title { font-size: 18px; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 600; }
#new-note-btn { padding: 8px 12px; border-radius: 6px; border: none; background-color: var(--accent-primary); color: white; font-size: 14px; font-weight: 500; cursor: pointer; transition: background-color 0.2s; }
#new-note-btn:hover { background-color: #0b5ed7; }
#note-list { overflow-y: auto; padding: 10px; flex-grow: 1; }
.note-item { padding: 15px; border-radius: 8px; cursor: pointer; margin-bottom: 8px; border: 1px solid #f1f3f5; position: relative; background-color: #fff; }
.note-item:hover { background-color: #f8f9fa; }
.note-item.active { background-color: #fff; border-color: var(--accent-primary); box-shadow: 0 0 0 1px var(--accent-primary); }
.note-item-title { font-weight: 500; margin: 0 0 5px; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.note-item-snippet { font-size: 13px; color: var(--text-secondary); margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.note-status-badge { position: absolute; top: 15px; right: 15px; font-size: 11px; padding: 2px 6px; border-radius: 10px; font-weight: 500; border: 1px solid; }
.note-status-badge.draft { color: var(--status-draft); border-color: var(--status-draft); }
.note-status-badge.in-progress { color: var(--status-in-progress); border-color: var(--status-in-progress); background-color: #fffbe6; }
.note-status-badge.completed { color: var(--status-completed); border-color: var(--status-completed); }
.empty-list-msg { text-align: center; padding: 20px; color: var(--text-placeholder); }

.editor-panel { display: flex; flex-direction: column; background-color: var(--bg-editor); overflow: hidden; }
#editor-workspace { display: flex; flex-direction: column; height: 100%; }
.editor-header { display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
#note-title-input { flex-grow: 1; font-size: 24px; font-weight: 700; border: none; outline: none; padding: 5px 0; background: transparent; }
.note-meta { display: flex; align-items: center; }
.note-meta label { font-size: 13px; color: var(--text-secondary); margin-left: 20px; }
#note-status-select { font-size: 13px; padding: 4px 8px; border-radius: 5px; border: 1px solid var(--border-color); margin: 0 10px; background: transparent; }
#delete-note-btn { margin-left: 10px; padding: 6px 10px; border-radius: 6px; border: 1px solid var(--accent-danger); background-color: transparent; color: var(--accent-danger); cursor: pointer; font-weight: 500; transition: background-color 0.2s; }
#delete-note-btn:hover { background-color: var(--accent-danger-bg); }
#editor-container { flex-grow: 1; overflow-y: auto; font-size: 16px; line-height: 1.7; }

#toolbar-container { padding: 8px; border-bottom: 1px solid var(--border-color) !important; background-color: #fdfdfd; flex-shrink: 0; }
.ql-toolbar { border: none !important; }
.ql-snow .ql-picker-label { font-size: 14px; }
.ql-snow .ql-picker.ql-lineHeight .ql-picker-label::before, .ql-snow .ql-picker.ql-lineHeight .ql-picker-item::before { content: '行高'; }
.ql-snow .ql-picker.ql-lineHeight .ql-picker-item[data-value="1"]::before { content: '1'; }
.ql-snow .ql-picker.ql-lineHeight .ql-picker-item[data-value="1.5"]::before { content: '1.5'; }
.ql-snow .ql-picker.ql-lineHeight .ql-picker-item[data-value="2"]::before { content: '2'; }
.ql-snow .ql-picker.ql-lineHeight .ql-picker-item[data-value="2.5"]::before { content: '2.5'; }
.ql-snow .ql-picker.ql-letterSpacing .ql-picker-label::before, .ql-snow .ql-picker.ql-letterSpacing .ql-picker-item::before { content: '字距'; }
.ql-snow .ql-picker.ql-letterSpacing .ql-picker-item[data-value="normal"]::before { content: '默认'; }
.ql-snow .ql-picker.ql-letterSpacing .ql-picker-item[data-value="1px"]::before { content: '1px'; }
.ql-snow .ql-picker.ql-letterSpacing .ql-picker-item[data-value="2px"]::before { content: '2px'; }
.ql-snow .ql-hr { width: 28px !important; }
.ql-snow .ql-hr:after { content: "—"; font-weight: bold; }

.ql-container.ql-snow { border: none !important; }
.ql-editor { padding: 25px 35px !important; font-family: var(--font-family); color: var(--text-primary); }
.ql-editor.ql-blank::before{ left: 35px !important; font-style: normal !important; color: var(--text-placeholder); }
.ql-editor blockquote { background-color: var(--highlight-block-bg); border-left: 4px solid var(--highlight-block-border); margin: 1em 0; padding: 10px 15px; border-radius: 4px; }
.ql-editor pre.ql-syntax { background-color: #282c34; color: #abb2bf; padding: 15px; border-radius: 6px; margin: 1em 0; white-space: pre-wrap; font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace; }
.ql-editor hr { border: none; border-top: 1px solid var(--border-color); margin: 1.5em 0; }
.ql-editor ul[data-checked=true], .ql-editor ul[data-checked=false] { padding-left: 0; }
.ql-editor li.ql-task { list-style-type: none; }
.ql-editor img { max-width: 100%; border-radius: 4px; }
.ql-editor .ql-image-selected { border: 3px solid var(--accent-primary); box-shadow: var(--shadow); }

.ql-tooltip { z-index: 1000 !important; box-shadow: var(--shadow); border-radius: 4px; }

#empty-editor-view { display: flex; justify-content: center; align-items: center; height: 100%; color: var(--text-placeholder); text-align: center; }
.license-footer { position: fixed; bottom: 5px; right: 10px; font-size: 12px; }
.license-footer a { color: #aaa; text-decoration: none; }