:root {
	--bg: #f6f7f9;
	--surface: #ffffff;
	--surface-2: #f0f2f5;
	--text: #1b1f24;
	--muted: #5f6b7a;
	--border: #d8dde3;
	--accent: #2b6cb0;
	--accent-text: #ffffff;
	--error: #c62828;
	--error-bg: #fdecea;
	--warning: #8a5a00;
	--warning-bg: #fff4dc;
	--ok: #2e7d32;
	--radius: 8px;
	--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	color-scheme: light;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #15181c;
		--surface: #1e2227;
		--surface-2: #262b31;
		--text: #e6e9ed;
		--muted: #9aa5b1;
		--border: #353c44;
		--accent: #5b9bdc;
		--accent-text: #0d1117;
		--error: #ff8a80;
		--error-bg: #3a1d1d;
		--warning: #ffd180;
		--warning-bg: #3a2f17;
		--ok: #81c784;
		color-scheme: dark;
	}
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

.topbar {
	display: flex;
	align-items: baseline;
	gap: 12px;
	padding: 12px 16px;
	background: var(--surface);
	border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.tagline { color: var(--muted); font-size: 13px; }

main { max-width: 1040px; margin: 0 auto; padding: 16px; }

h1 { font-size: 22px; margin: 8px 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 16px 0 8px; }

.muted { color: var(--muted); }
.small { font-size: 13px; }

button, .button {
	font: inherit;
	font-size: 14px;
	padding: 6px 12px;
	border-radius: 6px;
	border: 1px solid var(--border);
	background: var(--surface);
	color: var(--text);
	cursor: pointer;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	gap: 6px;
}
button:hover, .button:hover { border-color: var(--accent); }
button.primary, .button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.button[aria-disabled="true"] { opacity: 0.5; pointer-events: none; }
button.danger { color: var(--error); }
button.icon { padding: 4px 8px; }
button:disabled { opacity: 0.5; cursor: default; }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }
.toolbar .spacer { flex: 1; }

.card {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 16px;
	margin-bottom: 16px;
}

.notice {
	padding: 10px 12px;
	border-radius: 6px;
	background: var(--surface-2);
	margin-bottom: 12px;
	font-size: 14px;
}
.notice.error { background: var(--error-bg); color: var(--error); }
.notice.warning { background: var(--warning-bg); color: var(--warning); }

/* Projects list */
table.list { width: 100%; border-collapse: collapse; }
table.list th, table.list td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.list th { font-size: 13px; color: var(--muted); font-weight: 600; }
table.list td.actions { text-align: right; white-space: nowrap; }
.empty { text-align: center; padding: 32px 16px; color: var(--muted); }

/* Forms */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px 16px; }
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.field.wide { grid-column: 1 / -1; }
.field > span { font-size: 13px; font-weight: 600; }
.field .hint { font-size: 12px; color: var(--muted); }
.check { flex-direction: row; align-items: center; gap: 8px; }

input, select, textarea {
	font: inherit;
	font-size: 14px;
	padding: 6px 8px;
	border-radius: 6px;
	border: 1px solid var(--border);
	background: var(--surface);
	color: var(--text);
	width: 100%;
	min-width: 0;
}
input[type="checkbox"] { width: auto; }
textarea { resize: vertical; min-height: 60px; }
textarea.code { font-family: var(--mono); font-size: 13px; min-height: 120px; tab-size: 4; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
[aria-invalid="true"] { border-color: var(--error); }
.issue { font-size: 12px; }
.issue.error { color: var(--error); }
.issue.warning { color: var(--warning); }

/* Row tables (properties, variables, parameters) */
.rows { display: flex; flex-direction: column; gap: 8px; }
.row {
	display: grid;
	gap: 8px;
	align-items: start;
	padding: 8px;
	border: 1px solid var(--border);
	border-radius: 6px;
	background: var(--surface-2);
}
.row.property { grid-template-columns: 1fr 1.2fr 1.6fr 0.9fr 0.9fr auto; }
.row.variable { grid-template-columns: 1fr 1.6fr 0.8fr 0.9fr auto; }
.row.param { grid-template-columns: 1fr 1fr 0.8fr 1.6fr auto; }
.row.item { grid-template-columns: 1.4fr 1fr auto; background: var(--surface); }
.combo-items { margin: -2px 0 4px 24px; padding-left: 12px; border-left: 2px solid var(--border); }
.row .field > span { font-weight: 500; font-size: 12px; color: var(--muted); }
.row-buttons { display: flex; gap: 4px; padding-top: 20px; }

/* ACE cards */
details.ace { border: 1px solid var(--border); border-radius: 6px; background: var(--surface-2); margin-bottom: 8px; }
details.ace > summary { cursor: pointer; padding: 10px 12px; display: flex; gap: 8px; align-items: center; list-style: none; }
details.ace > summary::-webkit-details-marker { display: none; }
details.ace > summary::before { content: "▸"; color: var(--muted); }
details.ace[open] > summary::before { content: "▾"; }
details.ace > summary .id { font-family: var(--mono); font-size: 12px; color: var(--muted); }
details.ace > summary .badge { margin-left: auto; }
.ace-body { padding: 0 12px 12px; }
.badge { font-size: 11px; padding: 1px 8px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); }
.badge.error { color: var(--error); border-color: var(--error); }
.badge.warning { color: var(--warning); border-color: var(--warning); }

/* @link chips under the notes box */
.link-chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 6px 0 12px; }
button.chip { font-family: var(--mono); font-size: 12px; padding: 2px 8px; border-radius: 999px; }

/* @forge-add suggestions under a code box */
.forge-panel { margin: 12px 0 0; padding: 12px; border: 1px solid var(--accent); border-radius: 6px; background: var(--surface); }
.forge-row { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: start; padding: 8px 0; border-top: 1px solid var(--border); }
.forge-row .badge { margin-top: 22px; white-space: nowrap; }
.forge-status { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; padding-top: 18px; }
input.mono { font-family: var(--mono); font-size: 13px; }
@media (max-width: 720px) { .forge-row { grid-template-columns: 1fr; } .forge-status { align-items: flex-start; padding-top: 0; } .forge-row .badge { margin-top: 0; justify-self: start; } }

/* Highlight for something just added */
@keyframes flash-in { 0% { box-shadow: 0 0 0 3px var(--accent); } 70% { box-shadow: 0 0 0 3px var(--accent); } 100% { box-shadow: 0 0 0 0 transparent; } }
.flash { animation: flash-in 2.6s ease-out; }

/* Collapsible editor sections (D20) */
details.section { padding: 0; }
details.section > summary.section-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 14px 16px; cursor: pointer; list-style: none; }
details.section > summary.section-head::-webkit-details-marker { display: none; }
details.section > summary.section-head::before { content: "▸"; color: var(--muted); width: 12px; }
details.section[open] > summary.section-head::before { content: "▾"; }
details.section > summary.section-head h2 { margin: 0; }
details.section > summary.section-head .badge { margin-left: auto; }
details.section > .section-body { padding: 0 16px 16px; }
details.section:not([open]) { margin-bottom: 8px; }
.badge.ok { color: var(--ok); border-color: var(--ok); }
button.link-button { border: none; background: none; padding: 0; color: var(--accent); font-size: 14px; text-decoration: underline; }

/* Editor layout */
.editor-head { position: sticky; top: 0; z-index: 2; background: var(--bg); padding: 8px 0; }
.save-status { font-size: 13px; color: var(--muted); }
.save-status.error { color: var(--error); }
.section-nav { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 14px; margin-bottom: 12px; }
.issues-panel summary { cursor: pointer; font-weight: 600; }
.issues-panel ul { margin: 8px 0 0; padding-left: 18px; }
.issues-panel li { margin: 2px 0; }
.issues-panel a { cursor: pointer; }
pre.preview { font-family: var(--mono); font-size: 12px; white-space: pre-wrap; background: var(--surface-2); padding: 12px; border-radius: 6px; max-height: 420px; overflow: auto; }

/* Dialog */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 20px; max-width: min(520px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(0, 0, 0, 0.4); }
dialog .buttons { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; margin-top: 16px; }

@media (max-width: 720px) {
	.row.property, .row.variable, .row.param { grid-template-columns: 1fr 1fr; }
	.row-buttons { padding-top: 0; grid-column: 1 / -1; justify-content: flex-end; }
	.tagline { display: none; }
	table.list .hide-narrow { display: none; }
}