:root {
	color-scheme: dark;
	--bg: #0d1117;
	--panel: #151b23;
	--panel-2: #1b2230;
	--border: #2a3341;
	--text: #e6edf3;
	--muted: #9da7b3;
	--accent: #6ea8fe;
	--primary: #2563eb;
	--primary-hover: #1d4ed8;
	--primary-ink: #ffffff;
	--focus: #8ab4ff;
	--code-bg: #0f141b;
	--ln: #7d8899;
	--info: #132238;
	--info-border: #2c4d7f;
	--warn: #2a2213;
	--warn-border: #7a5f22;
	--error: #2d1618;
	--error-border: #8a3a3f;
	--tok-keyword: #d69cf2;
	--tok-string: #8bd49c;
	--tok-comment: #7d8899;
	--tok-number: #f2b26b;
	--tok-type: #8cc2ff;
	--radius: 12px;
	--sans: system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
	--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "D2Coding", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
	background: var(--bg);
	color: var(--text);
	font: 16px/1.6 var(--sans);
	-webkit-font-smoothing: antialiased;
	overflow-x: hidden;
}
h1, h2 { margin: 0; line-height: 1.25; }
/* Korean: break between words, not inside them (long tokens still wrap via overflow-wrap). */
html[lang="ko"] body { word-break: keep-all; overflow-wrap: anywhere; }
html[lang="ko"] .code, html[lang="ko"] .mono { word-break: normal; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); font-size: 13px; }

/* ---------- top bar ---------- */
.topbar {
	position: sticky;
	top: 0;
	z-index: 2;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	padding: 10px 24px;
	background: rgba(13, 17, 23, 0.94);
	border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; white-space: nowrap; flex: none; overflow-wrap: normal; }
.brand-mark { color: var(--accent); }
.topbar-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; min-width: 0; }
.pill {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 13px;
	padding: 4px 10px;
	border-radius: 999px;
	border: 1px solid var(--border);
	background: var(--panel);
	white-space: nowrap;
}
.pill-label { color: var(--muted); }
.ai-pill { border-color: var(--info-border); background: var(--info); }
.ai-pill.off { border-color: var(--warn-border); background: var(--warn); }
.lang-switch { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.lang-btn {
	font: 600 13px/1 var(--sans);
	padding: 7px 11px;
	border: 0;
	background: transparent;
	color: var(--muted);
	cursor: pointer;
}
.lang-btn[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); }

/* ---------- page ---------- */
.page { max-width: 1120px; margin: 0 auto; padding: 48px 24px 64px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; }

.ask-panel { display: grid; gap: 20px; max-width: 760px; width: 100%; margin: 0 auto; min-width: 0; }
.hero-text { text-align: center; display: grid; gap: 10px; }
.hero-text h1 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.01em; }
.subtitle { margin: 0; color: var(--muted); font-size: 17px; }

form { display: grid; gap: 10px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.field-label { margin: 0; font-size: 13px; font-weight: 600; color: var(--muted); }
textarea {
	width: 100%;
	min-height: 96px;
	resize: vertical;
	font: 17px/1.5 var(--sans);
	color: var(--text);
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: 10px;
	padding: 12px 14px;
}
textarea::placeholder { color: #7d8899; }
textarea:disabled { opacity: 0.6; }
.ask-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.hint { margin: 0; color: var(--muted); font-size: 13px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
	font: 600 15px/1.2 var(--sans);
	padding: 10px 18px;
	border-radius: 10px;
	border: 1px solid var(--border);
	cursor: pointer;
	min-height: 42px;
}
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-secondary { background: var(--panel-2); color: var(--text); }
.btn-secondary:hover:not(:disabled) { border-color: var(--muted); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.ai-off-note { margin: 0; font-size: 13px; color: var(--muted); }

.examples { display: grid; gap: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.chips li { display: flex; max-width: 100%; }
.chip {
	font: 14px/1.4 var(--sans);
	text-align: left;
	color: var(--text);
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 999px;
	padding: 7px 14px;
	cursor: pointer;
	max-width: 100%;
	overflow-wrap: anywhere;
}
.chip:hover { border-color: var(--accent); }
.note { margin: 0; font-size: 13px; color: var(--muted); text-align: center; }

.source-details { border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); padding: 10px 14px; }
.source-details summary { cursor: pointer; font-size: 14px; font-weight: 600; color: var(--muted); }
.source-details dl { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 6px 16px; margin: 12px 0 2px; font-size: 13px; }
.source-details dt { color: var(--muted); }
.source-details dd { margin: 0; white-space: pre-line; overflow-wrap: anywhere; }

/* compact question panel once there are results */
body.has-results .page { padding-top: 20px; }
body.has-results .ask-panel { max-width: none; gap: 12px; }
body.has-results .hero-text { text-align: left; }
body.has-results .hero-text h1 { font-size: 20px; }
body.has-results .subtitle,
body.has-results .examples,
body.has-results .note { display: none; }
body.has-results textarea { min-height: 56px; font-size: 16px; }

/* ---------- results ---------- */
.results { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; min-width: 0; }
.results:empty { display: none; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.section-head h2 { font-size: 17px; }

.notice { display: flex; gap: 12px; align-items: flex-start; border-radius: var(--radius); padding: 14px 16px; border: 1px solid var(--border); background: var(--panel); }
.notice p { margin: 4px 0 0; color: #b8c1cc; font-size: 14px; }
.notice-info { background: var(--info); border-color: var(--info-border); }
.notice-warn { background: var(--warn); border-color: var(--warn-border); }
.notice-error { background: var(--error); border-color: var(--error-border); }
.spinner { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--border); border-top-color: var(--accent); animation: spin 0.9s linear infinite; flex: none; margin-top: 3px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

.answer { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; min-width: 0; }
.caveat { margin: 0 0 14px; font-size: 13px; color: var(--muted); }
.claims { margin: 0; padding-left: 22px; display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); }
.claim { min-width: 0; }
.claim-text { margin: 0 0 6px; font-size: 16px; }
.cite { margin: 0 0 6px; font-size: 12.5px; color: var(--accent); overflow-wrap: anywhere; }
.claim .code { border-radius: 8px; border: 1px solid var(--border); }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 14px; min-width: 0; }
.card-head { padding: 12px 14px; border-bottom: 1px solid var(--border); display: grid; gap: 6px; min-width: 0; }
.card-title { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; font-family: var(--mono); font-size: 13.5px; min-width: 0; }
.rank { color: var(--muted); }
.path { font-weight: 600; overflow-wrap: anywhere; min-width: 0; }
.lines { color: var(--muted); }
.card-meta { display: flex; gap: 8px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); min-width: 0; }
.symbol { overflow-wrap: anywhere; min-width: 0; }
.role { padding: 0 8px; border-radius: 999px; border: 1px solid var(--border); font-family: var(--sans); }
.role-implementation { border-color: var(--info-border); color: var(--text); }
.role-test, .role-doc, .role-data { border-color: var(--warn-border); }
.link-btn { background: none; border: none; color: var(--accent); padding: 8px 14px 12px; font: 500 14px var(--sans); cursor: pointer; }

.code { font-family: var(--mono); font-size: 13px; line-height: 1.6; background: var(--code-bg); overflow-x: auto; padding: 10px 0; }
.code.collapsed { max-height: 420px; overflow-y: hidden; mask-image: linear-gradient(to bottom, #000 82%, transparent); }
.row { display: flex; min-width: max-content; }
.ln { flex: none; width: 3.6em; padding-right: 14px; text-align: right; color: var(--ln); user-select: none; }
.src { white-space: pre; padding-right: 18px; tab-size: 2; }
.tok-keyword { color: var(--tok-keyword); }
.tok-string { color: var(--tok-string); }
.tok-comment { color: var(--tok-comment); font-style: italic; }
.tok-number { color: var(--tok-number); }
.tok-type { color: var(--tok-type); }

/* ---------- small screens ---------- */
@media (max-width: 640px) {
	.topbar { padding: 8px 12px; }
	.project-pill .pill-label { display: none; }
	.page { padding: 24px 12px 48px; gap: 18px; }
	.subtitle { font-size: 15px; }
	form { padding: 12px; }
	.actions { width: 100%; display: grid; grid-template-columns: 1fr 1fr; }
	.btn { padding: 10px; }
	.code { font-size: 12px; }
	.ln { width: 3em; padding-right: 10px; }
}