diff --git a/assets/css/base.css b/assets/css/base.css
index 772f46f..11e49eb 100644
--- a/assets/css/base.css
+++ b/assets/css/base.css
@@ -5163,6 +5163,16 @@ body.lt-is-offline .lt-main { margin-top: 2rem; transition: margin-top 0.25s eas
 .lt-markdown a:focus-visible { outline: 2px solid var(--accent-cyan); outline-offset: 2px; }
 .lt-markdown strong { color: var(--text-primary); }
 .lt-markdown img, .md-image { max-width: 100%; height: auto; border: 1px solid var(--border-dim); border-radius: 2px; display: block; margin: 0.5rem 0; }
+.lt-markdown mark { background: var(--accent-yellow-dim, #2a2500); color: var(--accent-yellow, #e6c619); padding: 0 3px; border-radius: 2px; }
+.lt-markdown del { color: var(--text-muted); text-decoration: line-through; }
+.lt-markdown sub, .lt-markdown sup { font-size: 0.7em; line-height: 0; }
+.lt-markdown .task-item { list-style: none; margin-left: -1.2em; }
+.lt-markdown .task-cb { margin-right: 0.35em; font-size: 1em; }
+.lt-markdown .task-done { color: var(--text-muted); text-decoration: line-through; }
+.lt-markdown .task-todo { color: var(--text-secondary); }
+.lt-markdown ol { padding-left: 1.5em; margin: 0.5rem 0; }
+.lt-markdown ol li { color: var(--text-secondary); }
+.lt-markdown ol li::marker { color: var(--accent-orange); }
 .lt-markdown table { width: 100%; border-collapse: collapse; font-size: 0.78rem; margin: 0.75rem 0; }
 .lt-markdown th  { background: var(--bg-secondary); color: var(--accent-cyan); padding: 0.4rem 0.6rem; border: 1px solid var(--border-dim); text-align: left; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; }
 .lt-markdown td  { padding: 0.35rem 0.6rem; border: 1px solid var(--border-dim); color: var(--text-secondary); }
diff --git a/assets/js/markdown.js b/assets/js/markdown.js
index 44e0a4d..bc1fdf1 100644
--- a/assets/js/markdown.js
+++ b/assets/js/markdown.js
@@ -33,6 +33,9 @@ function parseMarkdown(markdown) {
     // Tables (must be processed before other block elements)
     html = parseMarkdownTables(html);
 
+    // Emoji :name: — common set
+    html = replaceEmoji(html);
+
     // Bold (**text** or __text__)
     html = html.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>');
     html = html.replace(/__(.+?)__/g, '<strong>$1</strong>');
@@ -41,9 +44,18 @@ function parseMarkdown(markdown) {
     html = html.replace(/\*(.+?)\*/g, '<em>$1</em>');
     html = html.replace(/_(.+?)_/g, '<em>$1</em>');
 
-    // Strikethrough (~~text~~)
+    // Strikethrough (~~text~~) — must run before subscript (~)
     html = html.replace(/~~(.+?)~~/g, '<del>$1</del>');
 
+    // Highlight (==text==)
+    html = html.replace(/==(.+?)==/g, '<mark>$1</mark>');
+
+    // Subscript H~2~O — single tilde (not preceded/followed by another tilde)
+    html = html.replace(/(?<!~)~([^~\n]+?)~(?!~)/g, '<sub>$1</sub>');
+
+    // Superscript X^2^ — caret pair
+    html = html.replace(/\^([^\^\n]+?)\^/g, '<sup>$1</sup>');
+
     // Images ![alt](url) - must come before link handler
     html = html.replace(/!\[([^\]]*)\]\(([^)]+)\)/g, function(match, alt, url) {
         if (/^https?:/i.test(url)) {
@@ -62,21 +74,29 @@ function parseMarkdown(markdown) {
         return text;
     });
 
-    // Auto-link bare URLs (http, https, ftp)
+    // Auto-link bare URLs (http, https)
     html = html.replace(/(?<!["\'>])(\bhttps?:\/\/[^\s<>\[\]()]+)/g, '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>');
 
-    // Headers (# H1, ## H2, etc.)
-    html = html.replace(/^### (.+)$/gm, '<h3>$1</h3>');
-    html = html.replace(/^## (.+)$/gm, '<h2>$1</h2>');
-    html = html.replace(/^# (.+)$/gm, '<h1>$1</h1>');
+    // Headings with optional {#id} anchor — ### My Heading {#my-id}
+    html = html.replace(/^(#{1,6})\s+(.+?)\s*(?:\{#([a-z0-9_-]+)\})?$/gm, function(match, hashes, text, id) {
+        const level = hashes.length;
+        const idAttr = id ? ' id="' + id + '"' : '';
+        return '<h' + level + idAttr + '>' + text + '</h' + level + '>';
+    });
 
-    // Lists
-    // Unordered lists (- item or * item)
+    // Task lists — must run before general list processing
+    html = html.replace(/^\s*-\s+\[x\]\s+(.+)$/gim, '<li class="task-item task-done"><span class="task-cb">&#x2611;</span> $1</li>');
+    html = html.replace(/^\s*-\s+\[ \]\s+(.+)$/gm,  '<li class="task-item task-todo"><span class="task-cb">&#x2610;</span> $1</li>');
+
+    // Unordered lists (- item or * item) — wrap consecutive <li> in <ul>
     html = html.replace(/^\s*[-*]\s+(.+)$/gm, '<li>$1</li>');
-    html = html.replace(/(<li>.*<\/li>)/s, '<ul>$1</ul>');
+    html = html.replace(/(<li>(?:(?!<li>|<\/ul>)[\s\S])*<\/li>(?:\n<li>(?:(?!<li>|<\/ul>)[\s\S])*<\/li>)*)/g, '<ul>$1</ul>');
 
-    // Ordered lists (1. item)
-    html = html.replace(/^\s*\d+\.\s+(.+)$/gm, '<li>$1</li>');
+    // Ordered lists (1. item) — wrap in <ol>
+    html = html.replace(/(?:^\s*\d+\.\s+.+$\n?)+/gm, function(block) {
+        const items = block.trim().replace(/^\s*\d+\.\s+(.+)$/gm, '<li>$1</li>');
+        return '<ol>' + items + '</ol>';
+    });
 
     // Blockquotes (> text)
     html = html.replace(/^&gt;\s+(.+)$/gm, '<blockquote>$1</blockquote>');
@@ -104,6 +124,52 @@ function parseMarkdown(markdown) {
     return html;
 }
 
+/**
+ * Replace :emoji: shortcodes with Unicode characters
+ */
+const _emojiMap = {
+    // Faces & emotions
+    smile: '😊', grin: '😁', joy: '😂', rofl: '🤣', smiley: '😃', sweat_smile: '😅',
+    wink: '😉', blush: '😊', heart_eyes: '😍', kissing: '😗', thinking: '🤔',
+    raised_eyebrow: '🤨', neutral_face: '😐', expressionless: '😑', unamused: '😒',
+    roll_eyes: '🙄', pensive: '😔', confused: '😕', worried: '😟', cry: '😢',
+    sob: '😭', scream: '😱', angry: '😠', rage: '😡', skull: '💀', sunglasses: '😎',
+    nerd: '🤓', monocle: '🧐', clown: '🤡', ghost: '👻', robot: '🤖', alien: '👽',
+    // Hands & people
+    thumbsup: '👍', '+1': '👍', thumbsdown: '👎', '-1': '👎', clap: '👏',
+    wave: '👋', raised_hands: '🙌', pray: '🙏', point_up: '☝️', point_right: '👉',
+    point_left: '👈', point_down: '👇', fist: '✊', punch: '👊', v: '✌️', ok_hand: '👌',
+    muscle: '💪', eyes: '👀', eye: '👁️', ear: '👂', brain: '🧠', man: '👨', woman: '👩',
+    // Hearts & symbols
+    heart: '❤️', orange_heart: '🧡', yellow_heart: '💛', green_heart: '💚',
+    blue_heart: '💙', purple_heart: '💜', black_heart: '🖤', broken_heart: '💔',
+    star: '⭐', star2: '🌟', sparkles: '✨', fire: '🔥', boom: '💥', zap: '⚡',
+    check: '✅', white_check_mark: '✅', x: '❌', heavy_check_mark: '✔️',
+    warning: '⚠️', no_entry: '⛔', stop_sign: '🛑', prohibited: '🚫',
+    question: '❓', exclamation: '❗', grey_question: '❔', grey_exclamation: '❕',
+    100: '💯', tada: '🎉', confetti_ball: '🎊', trophy: '🏆', medal: '🥇',
+    // Tech & work
+    bug: '🐛', rocket: '🚀', computer: '💻', keyboard: '⌨️', mouse: '🖱️',
+    printer: '🖨️', phone: '📱', email: '📧', inbox_tray: '📥', outbox_tray: '📤',
+    memo: '📝', pencil: '✏️', pen: '🖊️', paperclip: '📎', link: '🔗',
+    hammer: '🔨', wrench: '🔧', gear: '⚙️', lock: '🔒', unlock: '🔓',
+    key: '🔑', mag: '🔍', bar_chart: '📊', chart_increasing: '📈', chart_decreasing: '📉',
+    clipboard: '📋', calendar: '📅', clock: '🕐', hourglass: '⏳', bell: '🔔',
+    mute: '🔇', loud_sound: '🔊', bulb: '💡', battery: '🔋', electric_plug: '🔌',
+    recycle: '♻️', package: '📦', label: '🏷️', bookmark: '🔖', flag: '🚩',
+    // Nature & misc
+    sun: '☀️', moon: '🌙', cloud: '☁️', snowflake: '❄️', umbrella: '☂️',
+    dog: '🐶', cat: '🐱', pizza: '🍕', coffee: '☕', beer: '🍺',
+    white_flag: '🏳️', checkered_flag: '🏁', construction: '🚧', sos: '🆘',
+    info: 'ℹ️', new: '🆕', free: '🆓', cool: '🆒', up: '🆙', soon: '🔜',
+};
+
+function replaceEmoji(text) {
+    return text.replace(/:([a-z0-9_+\-]+):/g, function(match, name) {
+        return _emojiMap[name] || match;
+    });
+}
+
 /**
  * Parse markdown tables
  * Supports: | Header | Header |