:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1d2330;
    --muted: #6b7280;
    --border: #d9dde3;
    --primary: #2563eb;
    --primary-text: #ffffff;
    --alert: #fdecec;
    --alert-text: #a12828;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12151b;
        --card: #1b1f27;
        --text: #e6e8ec;
        --muted: #9aa1ad;
        --border: #2e3440;
        --primary: #3b82f6;
        --alert: #3a1d1d;
        --alert-text: #f3b4b4;
    }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    padding: 16px;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    width: 100%;
}
.login { max-width: 420px; margin-top: 10vh; }
.pad { max-width: 900px; display: flex; flex-direction: column; gap: 12px; height: calc(100vh - 32px); }
h1 { font-size: 1.4rem; margin: 0 0 8px; }
.pad h1 { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
label { display: block; font-weight: 600; margin: 16px 0 6px; }
.row { display: flex; gap: 8px; }
input, textarea {
    width: 100%;
    font: inherit;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
}
input:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
textarea { resize: vertical; }
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
}
.toolbar button, .toolbar select, .toolbar .color {
    font: inherit;
    font-size: 0.9rem;
    padding: 4px 8px;
    min-width: 32px;
    border-radius: 6px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text);
    cursor: pointer;
}
.toolbar button:hover, .toolbar select:hover, .toolbar .color:hover { border-color: var(--border); background: var(--card); }
.toolbar select { border-color: var(--border); }
.toolbar .sep { width: 1px; height: 22px; background: var(--border); margin: 0 2px; }
.toolbar .color { position: relative; display: inline-flex; align-items: center; justify-content: center; margin: 0; font-weight: 700; color: #d32f2f; }
.toolbar .color.hl { color: #f9a825; }
.toolbar .color input { position: absolute; inset: 0; opacity: 0; width: 100%; height: 100%; padding: 0; cursor: pointer; }
.editor {
    flex: 1;
    overflow-y: auto;
    min-height: 200px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    word-wrap: break-word;
}
.editor:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.editor.empty::before { content: attr(data-placeholder); color: var(--muted); pointer-events: none; }
.editor h1, .editor h2, .editor h3 { margin: 0.4em 0; }
.editor p { margin: 0 0 0.5em; }
.editor blockquote { margin: 0.5em 0; padding-left: 12px; border-left: 3px solid var(--border); color: var(--muted); }
.editor pre { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 8px; overflow-x: auto; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9rem; white-space: pre-wrap; }
.editor a { color: var(--primary); }
.ghost.danger { color: #d32f2f; border-color: #d32f2f; }
button, .btn {
    font: inherit;
    border-radius: 8px;
    padding: 10px 16px;
    cursor: pointer;
    border: 1px solid var(--border);
    text-decoration: none;
    white-space: nowrap;
}
.primary { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
form .primary { width: 100%; margin-top: 16px; }
.ghost { background: transparent; color: var(--text); }
.alert { background: var(--alert); color: var(--alert-text); padding: 10px 12px; border-radius: 8px; margin-top: 12px; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
@media (max-width: 520px) {
    .card { padding: 16px; }
    .actions { width: 100%; }
    .actions button { flex: 1; }
}