:root {
    color-scheme: light dark;
    --bg: #f5f7fb;
    --surface: #ffffff;
    --text: #18202f;
    --muted: #596579;
    --accent: #c5693b;
    --border: #dce1ea;
    --danger: #b42318;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #11151d;
        --surface: #1a202b;
        --text: #edf1f7;
        --muted: #aab4c5;
        --border: #303a4a;
    }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--accent); }
code { overflow-wrap: anywhere; }
main, .site-header, footer, .support { width: min(1100px, calc(100% - 2rem)); margin-inline: auto; }
main { min-height: 65vh; padding-block: 2rem; }
.site-header { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding-block: 1rem; }
.site-header nav { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--text); font-size: 1.35rem; font-weight: 800; text-decoration: none; }
.brand img { width: 2.6rem; height: 2.6rem; flex: none; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.card, fieldset, .support { background: var(--surface); border: 1px solid var(--border); border-radius: .8rem; padding: 1rem 1rem 1.4rem 1rem; }
.card>h2 { margin: 0 0 1rem 0; }
.status-card { display: grid; gap: .5rem; }
.status-card p { margin: 0; }
.warning-card { border-left: .35rem solid var(--danger); }
.ok-card { border-left: .35rem solid #2f855a; }
.button, button { border: 0; border-radius: .45rem; background: #5865F2; color: white; padding: .6rem .9rem; text-decoration: none; cursor: pointer; font: inherit; }
.button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.danger { background: var(--danger); }
.inline { display: inline; }
.flash { border-radius: .5rem; padding: .8rem; margin-bottom: 1rem; background: var(--surface); border: 1px solid var(--border); }
.flash.error { border-color: var(--danger); }
form.stack { display: grid; gap: 1rem; }
fieldset { display: grid; gap: .8rem; }
label { display: grid; gap: .3rem; font-weight: 600; }
label.check { display: flex; align-items: center; gap: .75rem; border: 0; border-radius: .55rem; background: transparent; padding: .25rem 0; cursor: pointer; }
label.check input[type="checkbox"] { width: 1.2rem; height: 1.2rem; accent-color: var(--accent); flex: none; }
label.check:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
label.check:has(input[type="checkbox"]:checked) { color: var(--text); }
label:not(.check) { margin-bottom: 1rem; }
input, select, textarea { width: 100%; border: 1px solid var(--border); border-radius: .4rem; padding: .6rem; background: var(--bg); color: var(--text); font: inherit; }
input:disabled, select:disabled, textarea:disabled { opacity: .65; cursor: not-allowed; }
input[type="checkbox"] { width: auto; }
table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
th, td { text-align: left; border-bottom: 1px solid var(--border); padding: .6rem; vertical-align: top; }
.muted, small { color: var(--muted); margin: 0; }
.warning-text { color: var(--danger); }
.support { margin-block: 2rem; display: grid; gap: .8rem; text-align: center; }
.support img { max-width: 100%; height: auto; }
.coffee { font-weight: 700; }
footer { display: flex; gap: .5rem; justify-content: center; padding-block: 2rem; color: var(--muted); flex-wrap: wrap; }
dl { display: grid; grid-template-columns: minmax(10rem, .4fr) 1fr; gap: .5rem 1rem; }
dt { font-weight: 700; }
dd { margin: 0; }
.tabs { display: flex; gap: .8rem; margin-bottom: 1rem; flex-wrap: wrap; }
.prose { max-width: 75ch; }
.error-panel { border-left: .35rem solid var(--accent); }
.eyebrow { margin: 0; color: var(--muted); font-size: .85rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.actions { display: flex; gap: .8rem; flex-wrap: wrap; align-items: center; margin-top: 1rem; }
.message-cell { min-width: min(32rem, 70vw); white-space: pre-wrap; }
.explain-box { display: grid; gap: 1rem; }
.explain-box h3 { margin: 0; font-size: 1rem; }
.explain-box p { margin: 0; }
.toggle-group { display: grid; gap: .65rem; border-radius: .75rem; background: var(--bg); padding: .8rem .9rem; border: 1px solid var(--border); }
.toggle-dependent { display: grid; gap: .3rem; padding-left: .3rem; transition: opacity .15s ease, filter .15s ease; }
.toggle-dependent label { margin-bottom: 0; }
.toggle-group.is-disabled .toggle-dependent { opacity: .48; filter: grayscale(.35); }
.toggle-group.is-disabled .toggle-dependent label { color: var(--muted); }
.rule-flow-card { border: 1px solid var(--border); border-radius: .9rem; background: var(--bg); padding: 1rem; display: grid; gap: .85rem; }
.duplicate-controls { display: grid; grid-template-columns: repeat(3, minmax(11rem, 1fr)); gap: .8rem; border: 0; border-radius: 0; padding: 0; background: transparent; position: relative; }
.duplicate-controls::before { content: none; }
.rule-card { margin: 0; border-radius: .65rem; background: var(--bg); padding: .8rem; align-content: start; }
.rule-card strong { display: block; font-size: 1.05rem; }
.rule-card.is-disabled { opacity: .72; }
.rule-card.is-invalid { border-color: var(--danger); }
.preview-panel { border: 1px solid var(--border); border-radius: .75rem; background: var(--bg); padding: .9rem; display: grid; gap: .85rem; }
.preview-picker { max-width: 18rem; }
.window-example { display: flex; align-items: stretch; gap: .5rem; flex-wrap: wrap; }
.window-start, .window-end { color: var(--muted); font-weight: 700; }
.window-start, .window-end, .window-disabled, .window-ellipsis, .window-response { border: 2px dashed var(--border); border-radius: .6rem; padding: .65rem; display: grid; place-items: center; min-width: 4rem; }
.window-event { border: 1px solid var(--border); border-radius: .6rem; padding: .65rem; text-align: center; background: var(--surface); position: relative; min-width: 7rem; }
.window-event::before { content: ""; position: absolute; top: 50%; left: -.55rem; width: .55rem; border-top: 2px solid var(--border); }
.window-event.trigger { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.window-event.trigger::after { content: attr(data-trigger-label); display: block; color: var(--accent); font-size: .8rem; font-weight: 700; text-transform: uppercase; margin-top: .25rem; }
.window-response { border-style: solid; border-color: var(--accent); color: var(--accent); font-weight: 700; }
.duration-editor { border: 1px solid var(--border); border-radius: .75rem; background: var(--bg); padding: .9rem; display: grid; gap: .75rem; }
.duration-editor h3 { margin: 0; font-size: 1rem; }
.duration-editor h3 [data-duration-summary] { color: var(--muted); font-weight: 600; }
.duration-parts { display: grid; grid-template-columns: repeat(4, minmax(7rem, 1fr)); gap: .75rem; }
.duration-parts label { margin: 0; }

@media (max-width: 760px) {
    .duplicate-controls { grid-template-columns: 1fr; }
    .duration-parts { grid-template-columns: repeat(2, minmax(7rem, 1fr)); }
    .window-example { display: grid; grid-template-columns: 1fr; }
    .window-event::before { display: none; }
}