* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
	--bg: #f7f5f0;
	--panel: #ffffff;
	--ink: #26221c;
	--muted: #6f675c;
	--line: #e2dccf;
	--accent: #a4552c;
	--accent-ink: #fff;
	--good: #3d6b43;
	--bad: #9c3b30;
}

body {
	font-family: Georgia, 'Times New Roman', serif;
	background: var(--bg);
	color: var(--ink);
	line-height: 1.55;
}

.wrapper { max-width: 860px; margin: 0 auto; padding: 0 1rem; }

header { border-bottom: 1px solid var(--line); background: var(--panel); }
header .wrapper { display: flex; align-items: baseline; justify-content: space-between; padding: 0.9rem 1rem; }
header .title { font-size: 1.25rem; font-weight: bold; color: var(--ink); text-decoration: none; }
header nav a { margin-left: 1.2rem; color: var(--muted); text-decoration: none; font-size: 0.95rem; }
header nav a:hover { color: var(--accent); }

.main { padding: 1.6rem 1rem 3rem; min-height: 70vh; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; }
footer .wrapper { padding: 1rem; }

a { color: var(--accent); }

h2 { margin: 0.4rem 0; font-weight: bold; }
h3 { margin: 1rem 0 0.4rem; }

.intro { color: var(--muted); margin-bottom: 1.4rem; }

.puzzle-list .puzzle { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 1rem 1.2rem; margin-bottom: 1rem; }
.puzzle-list .puzzle h2 a { text-decoration: none; }
.concept { color: var(--muted); font-style: italic; font-size: 0.95rem; }
.meta, .usage, .note { color: var(--muted); font-size: 0.85rem; margin: 0.4rem 0; }
.back { font-size: 0.9rem; text-decoration: none; }

.button {
	display: inline-block; cursor: pointer; user-select: none;
	background: var(--accent); color: var(--accent-ink);
	padding: 0.35rem 1.1rem; border-radius: 4px; margin: 0.6rem 0.4rem 0.6rem 0;
	text-decoration: none; font-family: inherit;
}
.button:hover { filter: brightness(1.1); }
.button.secondary { background: var(--panel); color: var(--accent); border: 1px solid var(--accent); }
.button.selected { background: var(--good); }

.feed { margin-top: 0.6rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 0.8rem 1rem; margin: 0.7rem 0; }
.card.narration { background: transparent; border: none; padding: 0.4rem 0.2rem; }
.card.response { border-left: 3px solid var(--accent); }
.card.response pre { white-space: pre-wrap; font-family: 'Courier New', monospace; font-size: 0.9rem; margin-top: 0.4rem; }
.card.error { border-left: 3px solid var(--bad); color: var(--bad); }
.card.input label { display: block; font-weight: bold; margin-bottom: 0.3rem; }
.card.input input[type="text"], .card.input input[type="password"] {
	font-family: inherit; font-size: 1rem; padding: 0.3rem 0.5rem;
	border: 1px solid var(--line); border-radius: 4px; width: 60%;
}
.card.input.answered { opacity: 0.75; }
.card.input.answered .button:not(.selected) { opacity: 0.45; pointer-events: none; }
.card .options .button { margin-right: 0.5rem; }
.card .slider { display: flex; align-items: center; gap: 0.8rem; }
.card .slider input[type="range"] { flex: 1; accent-color: var(--accent); }
.card .slider .value { min-width: 3rem; font-variant-numeric: tabular-nums; }

.chip {
	display: inline-block; font-family: 'Courier New', monospace; font-size: 0.75rem;
	background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
	padding: 0.05rem 0.6rem; color: var(--muted);
}

.frame iframe { width: 320px; height: 320px; border: 1px solid var(--line); background: #fff; margin-top: 0.5rem; }

table { border-collapse: collapse; margin: 0.6rem 0; width: 100%; background: var(--panel); }
th, td { border: 1px solid var(--line); padding: 0.35rem 0.7rem; text-align: left; font-size: 0.95rem; }
th { background: var(--bg); }

.results h3 { margin-top: 1.4rem; }

.form .field { margin: 0.5rem 0; }
.form .field label { display: inline-block; width: 10rem; color: var(--muted); }
.form .field input, .form .field select { font-family: inherit; font-size: 0.95rem; padding: 0.3rem 0.5rem; border: 1px solid var(--line); border-radius: 4px; width: min(28rem, 90%); }
.form fieldset { border: 1px solid var(--line); border-radius: 6px; margin: 0.8rem 0; padding: 0.6rem 1rem; }
.form legend { color: var(--muted); padding: 0 0.4rem; }

.loading, .error { color: var(--muted); padding: 1rem 0; }

@media (max-width: 600px) {
	.form .field label { display: block; width: auto; }
	.card.input input[type="text"] { width: 100%; }
}