:root {
	--bg: #f4f6f8;
	--panel: #ffffff;
	--text: #1a1f24;
	--muted: #5c6b76;
	--accent: #0b6e4f;
	--accent-hover: #095c42;
	--border: #d7dee5;
	--user-bg: #e8f3ee;
	--agent-bg: #f0f2f5;
	--warn-bg: #fff4e5;
	--warn-text: #8a5a00;
	--ok-text: #0b6e4f;
	--error: #b42318;
	--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	--sans: "Source Sans 3", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
	margin: 0;
	font-family: var(--sans);
	background: linear-gradient(160deg, #eef3f1 0%, var(--bg) 45%, #e8eef5 100%);
	color: var(--text);
	min-height: 100vh;
}

.app {
	max-width: 820px;
	margin: 0 auto;
	padding: 20px 16px 40px;
}

.header h1 {
	margin: 0 0 4px;
	font-size: 1.5rem;
	font-weight: 700;
	letter-spacing: -0.02em;
}

.subtitle {
	margin: 0 0 12px;
	color: var(--muted);
	font-size: 0.95rem;
}

.warn {
	background: var(--warn-bg);
	color: var(--warn-text);
	padding: 8px 12px;
	border-radius: 6px;
	font-size: 0.9rem;
}

.ok {
	color: var(--ok-text);
	font-size: 0.85rem;
	margin: 0 0 8px;
}

.chat {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 10px;
	overflow: hidden;
	box-shadow: 0 8px 24px rgba(26, 31, 36, 0.06);
}

.messages {
	min-height: 280px;
	max-height: calc(100vh - 280px);
	overflow-y: auto;
	padding: 16px;
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.bubble {
	padding: 10px 12px;
	border-radius: 8px;
	max-width: 95%;
	white-space: pre-wrap;
	line-height: 1.45;
	font-size: 0.95rem;
}

.bubble.user {
	align-self: flex-end;
	background: var(--user-bg);
}

.bubble.agent {
	align-self: flex-start;
	background: var(--agent-bg);
}

.bubble.error {
	align-self: stretch;
	background: #fef3f2;
	color: var(--error);
	border: 1px solid #fecdca;
}

.bubble.meta {
	align-self: stretch;
	background: #fafafa;
	border: 1px dashed var(--border);
	font-family: var(--mono);
	font-size: 0.75rem;
	color: var(--muted);
	max-height: 240px;
	overflow: auto;
}

.ask-form {
	border-top: 1px solid var(--border);
	padding: 12px;
	display: flex;
	flex-direction: column;
	gap: 8px;
	background: #fbfcfd;
}

textarea {
	width: 100%;
	resize: vertical;
	min-height: 72px;
	padding: 10px 12px;
	border: 1px solid var(--border);
	border-radius: 8px;
	font: inherit;
	font-size: 0.95rem;
}

textarea:focus {
	outline: 2px solid rgba(11, 110, 79, 0.35);
	border-color: var(--accent);
}

.ask-actions {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
}

button {
	background: var(--accent);
	color: #fff;
	border: none;
	border-radius: 8px;
	padding: 10px 18px;
	font: inherit;
	font-weight: 600;
	cursor: pointer;
}

button:hover:not(:disabled) {
	background: var(--accent-hover);
}

button:disabled {
	opacity: 0.55;
	cursor: wait;
}

.toggle {
	font-size: 0.85rem;
	color: var(--muted);
	display: flex;
	align-items: center;
	gap: 6px;
	user-select: none;
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0,0,0,0);
	border: 0;
}

.thinking {
	color: var(--muted);
	font-style: italic;
}