<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Cairn — Team Inbox</title>
<link rel="stylesheet" href="styles.css" />
</head>
<body>
  <a class="skip-link" href="#main">Skip to content</a>

  <header class="topbar">
    <div class="brand">
      <span class="brand-mark" aria-hidden="true">
        <svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 20h16M6 20V10l6-6 6 6v10M9 20v-6h6v6"/></svg>
      </span>
      <div>
        <div class="brand-name">Cairn</div>
        <div class="brand-sub">Team inbox</div>
      </div>
    </div>
    <div class="topbar-meta">
      <span id="task-count" class="meta-pill"></span>
    </div>
  </header>

  <div class="layout">
    <aside class="sidebar" aria-label="Filters">
      <section class="side-section">
        <h2 class="side-title">Search</h2>
        <label class="field-label" for="search">Search tasks</label>
        <div class="search-wrap">
          <svg class="search-icon" viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><circle cx="11" cy="11" r="7"/><path d="m20 20-3.5-3.5"/></svg>
          <input id="search" data-testid="search" type="search" placeholder="Search by title…" autocomplete="off" />
        </div>
      </section>

      <section class="side-section">
        <h2 class="side-title">Status</h2>
        <label class="field-label" for="filter">Filter by status</label>
        <select id="filter" data-testid="filter">
          <option value="all">All statuses</option>
          <option value="todo">To do</option>
          <option value="in-progress">In progress</option>
          <option value="blocked">Blocked</option>
          <option value="done">Done</option>
        </select>
      </section>

      <section class="side-section">
        <h2 class="side-title">Overview</h2>
        <ul class="counts" id="counts"></ul>
      </section>
    </aside>

    <main id="main" class="main" tabindex="-1">
      <div class="main-head">
        <h1 class="main-title">Tasks</h1>
        <p class="main-sub" id="result-summary"></p>
      </div>
      <div id="list-wrap">
        <ul class="task-list" id="task-list" role="list"></ul>
      </div>
      <div id="empty-state" data-testid="empty-state" class="empty-state" hidden>
        <div class="empty-illustration" aria-hidden="true">
          <svg viewBox="0 0 120 120" width="80" height="80" fill="none" stroke="currentColor" stroke-width="1.5"><circle cx="60" cy="60" r="46"/><path d="M40 60h40M60 40v40" stroke-dasharray="4 4"/></svg>
        </div>
        <h2>No tasks match</h2>
        <p>Try a different search term or clear the filters to see everything.</p>
        <button type="button" id="clear-filters" class="btn btn-primary">Clear filters</button>
      </div>
    </main>
  </div>

  <dialog id="detail-dialog" class="detail-dialog" aria-labelledby="detail-title">
    <div class="detail" data-testid="detail">
      <!-- filled by JS -->
    </div>
  </dialog>

  <div id="toast" class="toast" role="status" aria-live="polite" aria-atomic="true"></div>

  <script src="app.js"></script>
</body>
</html>
```

Now CSS.<|end|><|start|> assistant to=write<|channel|>analysis <|constrain|>xml<|message|><rfl:parameter name="content">
@font-face {
  font-family: 'DM Sans';
  src: url('assets/dm-sans.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'DM Serif Display';
  src: url('assets/dm-serif.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('assets/ibm-plex-mono.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #f4efe6;
  --surface: #fbf8f2;
  --surface-2: #f0e9dd;
  --ink: #1c1a17;
  --ink-soft: #4a453d;
  --muted: #7a7368;
  --line: #e3dccf;
  --line-strong: #cfc4b2;
  --accent: #c2410c;
  --accent-soft: #fde6d8;
  --accent-ink: #7c2d12;
  --green: #15803d;
  --green-soft: #dcfce7;
  --amber: #a16207;
  --amber-soft: #fef3c7;
  --red: #b91c1c;
  --red-soft: #fee2e2;
  --blue: #1d4ed8;
  --blue-soft: #dbeafe;
  --shadow: 0 1px 2px rgba(28,26,23,.06), 0 8px 24px rgba(28,26,23,.08);
  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1280px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--surface);
  padding: 8px 12px; border-radius: 6px; z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--ink); color: var(--surface);
  display: grid; place-items: center;
}
.brand-name {
  font-family: 'DM Serif Display', serif;
  font-size: 22px; line-height: 1; letter-spacing: .2px;
}
.brand-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.meta-pill {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; color: var(--ink-soft);
  background: var(--surface-2); border: 1px solid var(--line);
  padding: 6px 10px; border-radius: 999px;
}

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  max-width: var(--maxw);
  margin: 0 auto;
  min-height: calc(100vh - 72px);
}

.sidebar {
  padding: 24px 20px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  display: flex; flex-direction: column; gap: 24px;
  position: sticky; top: 72px;
  height: calc(100vh - 72px);
  overflow-y: auto;
}
.side-section { display: flex; flex-direction: column; gap: 8px; }
.side-title {
  font-size: 11px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); margin: 0 0 4px;
}
.field-label { font-size: 13px; color: var(--ink-soft); }
.search-wrap { position: relative; }
.search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
#search {
  width: 100%; padding: 10px 12px 10px 36px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--ink); font: inherit; font-size: 14px;
}
#search:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
select {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--ink); font: inherit; font-size: 14px;
  cursor: pointer;
}
select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.counts { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.counts li {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border-radius: var(--radius-sm);
  background: var(--surface-2); font-size: 13px;
}
.counts .count {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  color: var(--ink-soft);
}
.counts .dot {
  width: 8px; height: 8px; border-radius: 50%; margin-right: 8px;
  display: inline-block;
}
.dot.todo { background: var(--muted); }
.dot.in-progress { background: var(--blue); }
.dot.blocked { background: var(--red); }
.dot.done { background: var(--green); }

.main { padding: 28px 32px; }
.main-head { margin-bottom: 18px; }
.main-title {
  font-family: 'DM Serif Display', serif;
  font-size: 34px; line-height: 1.1; margin: 0;
}
.main-sub { color: var(--muted); margin: 4px 0 0; font-size: 13px; }

.task-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.task-item {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px;
  display: grid; grid-template-columns: 1fr auto; gap: 12px;
  align-items: start;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
  box-shadow: 0 1px 0 rgba(28,26,23,.03);
}
.task-item:hover { border-color: var(--line-strong); box-shadow: var(--shadow); transform: translateY(-1px); }
.task-item .title {
  font-size: 15px; font-weight: 600; margin: 0 0 6px;
  color: var(--ink);
}
.task-item .meta {
  display: flex; flex-wrap: wrap; gap: 6px 14px;
  font-size: 12.5px; color: var(--muted);
}
.task-item .meta span { display: inline-flex; align-items: center; gap: 4px; }
.task-item .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag {
  font-size: 11px; padding: 3px 8px; border-radius: 999px;
  background: var(--surface-2); color: var(--ink-soft);
  border: 1px solid var(--line);
}
.status-badge {
  font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  letter-spacing: .02em; white-space: nowrap;
}
.status-badge.todo { background: var(--surface-2); color: var(--ink-soft); }
.status-badge.in-progress { background: var(--blue-soft); color: var(--blue); }
.status-badge.blocked { background: var(--red-soft); color: var(--red); }
.status-badge.done { background: var(--green-soft); color: var(--green); }

.priority {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  text-transform: uppercase; letter-spacing: .08em;
}
.priority.high { color: var(--red); }
.priority.medium { color: var(--amber); }
.priority.low { color: var(--muted); }

.open-item {
  background: var(--ink); color: var(--surface);
  border: none; border-radius: var(--radius-sm);
  padding: 8px 14px; font: inherit; font-size: 13px; font-weight: 600;
  cursor: pointer; white-space: nowrap;
}
.open-item:hover { background: var(--accent); }
.open-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--ink-soft);
}
.empty-state h2 { font-family: 'DM Serif Display', serif; font-size: 24px; margin: 8px 0 4px; color: var(--ink); }
.empty-state p { color: var(--muted); margin: 0 0 16px; }
.empty-illustration { color: var(--line-strong); margin-bottom: 8px; }

.btn {
  font: inherit; font-size: 13px; font-weight: 600;
  padding: 9px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong); background: var(--surface);
  color: var(--ink); cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-ink); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Detail dialog */
.detail-dialog {
  border: none; padding: 0; background: transparent;
  max-width: 100vw; max-height: 100vh; width: 100%; height: 100%;
  margin: 0;
}
.detail-dialog::backdrop {
  background: rgba(28,26,23,.45);
  backdrop-filter: blur(2px);
}
.detail-dialog[open] { display: flex; justify-content: flex-end; align-items: stretch; }
.detail {
  background: var(--surface);
  width: min(520px, 100vw);
  height: 100%;
  padding: 28px 26px;
  overflow-y: auto;
  box-shadow: -12px 0 40px rgba(28,26,23,.18);
  display: flex; flex-direction: column; gap: 18px;
  animation: slideIn .22s ease;
}
@keyframes slideIn { from { transform: translateX(24px); opacity: .6; } to { transform: none; opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .detail { animation: none; }
  .task-item { transition: none; }
}

.detail-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.detail-title {
  font-family: 'DM Serif Display', serif;
  font-size: 26px; line-height: 1.15; margin: 0;
}
.close-detail {
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: var(--radius-sm); width: 36px; height: 36px;
  display: grid; place-items: center; cursor: pointer; color: var(--ink);
  flex-shrink: 0;
}
.close-detail:hover { background: var(--line); }
.close-detail:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.detail-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.meta-card {
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 10px 12px;
}
.meta-card .k { font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.meta-card .v { font-size: 14px; color: var(--ink); margin-top: 2px; }

.detail-body {
  font-size: 15px; line-height: 1.6; color: var(--ink-soft);
  white-space: pre-wrap;
}
.detail-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.status-row { display: flex; flex-direction: column; gap: 6px; margin-top: 4px; }
.status-row label { font-size: 13px; color: var(--ink-soft); font-weight: 600; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--surface);
  padding: 10px 16px; border-radius: 999px; font-size: 13px;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  z-index: 60;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static; height: auto; border-right: none;
    border-bottom: 1px solid var(--line);
  }
  .detail { width: 100vw; }
}
@media (max-width: 520px) {
  .topbar { padding: 14px 16px; }
  .main { padding: 18px 16px; }
  .task-item { grid-template-columns: 1fr; }
  .open-item { width: 100%; }
}
