:root {
  --bg: #0d0f14;
  --bg-elev: #161a22;
  --bg-elev-2: #1d222c;
  --border: #2a3140;
  --text: #e6e9ef;
  --muted: #9aa4b2;
  --accent: #7cf5c4;
  --accent-2: #6ea8fe;
  --warn-bg: #2a2410;
  --warn-border: #6b5a1c;
  --radius: 14px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 50% -200px, #17324a55, transparent),
    var(--bg);
  line-height: 1.55;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.wrap { width: min(960px, 92vw); margin-inline: auto; }

/* header */
.site-header { padding: 1.5rem 0 2rem; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.nav { display: flex; gap: .35rem; }
.nav a {
  color: var(--muted); text-decoration: none; font-weight: 600; font-size: .95rem;
  padding: .45rem .85rem; border-radius: 9px; border: 1px solid transparent;
}
.nav a:hover { color: var(--text); background: var(--bg-elev); }
.nav a.active { color: var(--text); background: var(--bg-elev); border-color: var(--border); }
.brand {
  display: inline-flex; align-items: baseline; gap: .5rem;
  font-family: var(--mono); font-weight: 700; font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: -0.02em;
}
.brand-mark { font-size: .95em; }
.brand-name { color: var(--text); }
.tld { color: var(--accent); }
.tagline { color: var(--muted); margin: 1rem 0 0; max-width: 60ch; }

/* search + filters */
.controls { margin: 0 0 2rem; }
.search {
  width: 100%; box-sizing: border-box;
  background: var(--bg-elev); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px;
  padding: .85rem 1.1rem; font-size: 1rem; font-family: var(--sans);
}
.search:focus { outline: none; border-color: var(--accent-2); }
.search::placeholder { color: #66707e; }
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .9rem; }
.filter {
  cursor: pointer; font-family: var(--sans); font-size: .85rem; font-weight: 600;
  color: var(--muted); background: transparent;
  border: 1px solid var(--border); border-radius: 999px; padding: .35rem .8rem;
  display: inline-flex; align-items: center; gap: .4rem;
}
.filter:hover { color: var(--text); border-color: #3a465b; }
.filter.active { color: #06210f; background: var(--accent); border-color: var(--accent); }
.filter-n { font-family: var(--mono); font-size: .72rem; opacity: .8; }
.filter.active .filter-n { opacity: .7; }
/* manual device picker + detect */
.picker { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; margin-top: 1.1rem; }
.picker-label {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); font-weight: 700; width: 100%;
}
.btn.detect {
  width: auto; background: transparent; color: var(--accent-2);
  border: 1px solid var(--accent-2); padding: .35rem .8rem; font-size: .85rem;
  border-radius: 999px; margin-left: auto;
}
.btn.detect:hover { background: #16233a; filter: none; }
.btn.detect:disabled { opacity: .4; cursor: not-allowed; }

.banner-detect { margin: 1rem 0 0; padding: .7rem 1rem; font-size: .9rem; }
.banner-busy { border-color: var(--accent-2); color: var(--muted); }
.banner-ok { border-color: var(--accent); background: #0c2019; }
.banner-err { border-color: #6b2b2b; background: #2a1414; color: #f0c0c0; }
.banner-detect b { color: var(--text); }
.link-clear {
  background: none; border: 0; color: var(--accent-2); cursor: pointer;
  font: inherit; text-decoration: underline; padding: 0 0 0 .4rem;
}

.advanced { margin-top: 1rem; }
.advanced > summary {
  cursor: pointer; color: var(--muted); font-size: .82rem; font-family: var(--mono);
  width: fit-content; list-style-position: inside;
}
.advanced > summary:hover { color: var(--text); }
.advanced-body {
  display: flex; align-items: center; gap: 1.1rem; flex-wrap: wrap;
  margin-top: .8rem; padding: .9rem 1rem; background: var(--bg-elev); border: 1px solid var(--border); border-radius: 10px;
}
.help-block { flex-basis: 100%; color: var(--muted); font-size: .85rem; border-top: 1px dashed var(--border); padding-top: .7rem; }
.help-block p { margin: .35rem 0; }
.help-block b { color: var(--text); }
.help-block a { color: var(--accent-2); }
.speed-row { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; margin-top: 1rem; }
.speed-hint { color: var(--muted); font-size: .78rem; font-family: var(--mono); }
.flash-speed { font-size: .85rem; color: var(--text); display: inline-flex; align-items: center; gap: .5rem; }
.flash-speed select {
  background: var(--bg-elev); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: .4rem .6rem; font-family: var(--mono); font-size: .82rem;
}
.flash-speed select {
  background: var(--bg-elev); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: .3rem .5rem; font-family: var(--mono); font-size: .8rem;
}

.count { margin-top: .85rem; color: var(--muted); font-family: var(--mono); font-size: .8rem; }

/* flash progress overlay */
.flash-overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(5, 7, 10, 0.78);
  display: flex; align-items: center; justify-content: center; padding: 1.5rem;
}
.flash-overlay[hidden] { display: none; }
.flash-modal {
  width: min(440px, 92vw); background: var(--bg-elev-2);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.35rem; text-align: center;
}
.flash-title { margin: 0 0 1rem; font-size: 1.2rem; }
.flash-bar { height: 8px; background: #0b0e13; border-radius: 999px; overflow: hidden; margin: 0 0 .5rem; }
.flash-bar-fill { height: 100%; width: 0; background: var(--accent-2); transition: width .2s ease; }
.state-ok .flash-bar-fill { background: var(--accent); }
.flash-pct { font-family: var(--mono); font-size: .85rem; color: var(--muted); }
.flash-status { margin: .6rem 0 0; color: var(--muted); font-size: .88rem; min-height: 2.4em; }
.flash-hint { margin: .5rem 0 0; color: #f0d99a; font-size: .82rem; min-height: 1em; }
.state-ok .flash-hint { color: var(--muted); }
.state-err .flash-title { color: #ff8080; }
.state-ok .flash-title { color: var(--accent); }
.flash-actions { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; margin-top: 1.1rem; }
.flash-actions .btn { width: auto; flex: 1 1 auto; min-width: 120px; }
.line-n {
  margin-left: auto; font-family: var(--mono); font-size: .75rem; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: .05rem .5rem;
}
.line-help { margin: -.4rem 0 1.15rem; color: var(--muted); font-size: .88rem; }
.line-help summary { cursor: pointer; color: var(--accent-2); font-family: var(--mono); font-size: .8rem; width: fit-content; }
.line-help p { margin: .5rem 0 0; max-width: 70ch; }

/* banners */
.banner {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 0 0 1.75rem;
  background: var(--bg-elev);
}
.banner-warn { background: var(--warn-bg); border-color: var(--warn-border); }
.banner b, .banner strong { color: var(--text); }

/* targets grid */
main { flex: 1 0 auto; padding-bottom: 3rem; }
.line-section { margin-bottom: 2.5rem; }
.line-head {
  display: flex; align-items: baseline; gap: .75rem; flex-wrap: wrap;
  border-bottom: 1px solid var(--border); padding-bottom: .5rem; margin-bottom: 1.15rem;
}
.line-head h2 { margin: 0; font-size: 1.35rem; letter-spacing: -0.01em; }
.line-head span { color: var(--muted); font-family: var(--mono); font-size: .8rem; }
.targets {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.15rem;
}
.loading, .empty { color: var(--muted); font-family: var(--mono); padding: 2rem 0; }
.empty { text-align: center; }
.empty-text { color: var(--muted); }

/* ascii cats */
.cat-art { font-family: var(--mono); white-space: pre; line-height: 1.12; margin: 0 auto .9rem; display: inline-block; color: var(--accent); font-size: .82rem; }
.footer-cat { font-family: var(--mono); white-space: pre; line-height: 1.12; margin: 1.3rem 0 0; color: #3a465b; font-size: .78rem; }
.flash-cat { font-family: var(--mono); white-space: pre; line-height: 1.12; margin: .1rem auto .8rem; color: var(--accent); font-size: .8rem; display: inline-block; text-align: left; }
.flash-cat:empty { display: none; margin: 0; }

.card {
  background: linear-gradient(180deg, var(--bg-elev), var(--bg-elev-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1.35rem;
  display: flex; flex-direction: column; gap: 1rem;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: #3a465b; transform: translateY(-2px); }
.card-head { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.card-name { font-size: 1.15rem; margin: 0; margin-right: auto; }
.rec-badge {
  font-size: .68rem; font-weight: 700; letter-spacing: .03em; white-space: nowrap;
  color: #06210f; background: var(--accent); border-radius: 999px; padding: .15rem .55rem;
}
.chip {
  font-family: var(--mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .04em; color: var(--accent-2);
  border: 1px solid var(--border); border-radius: 999px;
  padding: .2rem .6rem; white-space: nowrap;
}
.card-desc { color: var(--muted); font-size: .9rem; margin: 0; }
.meta { display: flex; gap: 1.5rem; margin: 0; flex-wrap: wrap; }
.meta dt { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; }
.meta dd { margin: .15rem 0 0; font-family: var(--mono); font-size: .9rem; }

/* add-ons */
.addons { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; }
.addons-label {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .05em;
  color: var(--warn-border); font-weight: 700; margin-right: .1rem;
}
.addon {
  font-family: var(--mono); font-size: .74rem; color: #f0d99a;
  background: var(--warn-bg); border: 1px solid var(--warn-border);
  border-radius: 7px; padding: .18rem .5rem;
}
.addon-ok { color: var(--muted); background: transparent; border-color: var(--border); }

.card-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.src-link { color: var(--accent-2); text-decoration: none; font-size: .85rem; font-family: var(--mono); white-space: nowrap; }
.src-link:hover { text-decoration: underline; }
.card-foot .card-action { flex: 1; max-width: 160px; }

/* buttons */
.btn, esp-web-install-button button {
  appearance: none; cursor: pointer;
  font-family: var(--sans); font-size: .95rem; font-weight: 600;
  color: #06210f; background: var(--accent);
  border: 0; border-radius: 10px; padding: .7rem 1.1rem;
  width: 100%; text-align: center; text-decoration: none; display: inline-block;
  transition: filter .15s ease;
}
.btn:hover, esp-web-install-button button:hover { filter: brightness(1.08); }
.btn.secondary {
  background: transparent; color: var(--accent);
  border: 1px solid var(--accent);
}
esp-web-install-button[install-unsupported] { display: block; }
.unsupported-note { color: var(--muted); font-size: .85rem; font-family: var(--mono); }

/* uf2 flow */
.uf2 ol { margin: .25rem 0 1rem; padding-left: 1.2rem; color: var(--muted); font-size: .9rem; }
.uf2 ol b { color: var(--text); font-family: var(--mono); }
.uf2 .drive { color: var(--accent); }

/* flash your own .bin */
.custom-flash {
  margin: 2.5rem 0 0; padding: 1.4rem 1.5rem 1.5rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-elev), var(--bg-elev-2));
}
.cf-head { display: flex; align-items: center; gap: .7rem; }
.cf-head h2 { margin: 0; font-size: 1.2rem; }
.cf-desc { color: var(--muted); font-size: .9rem; margin: .5rem 0 1rem; }
.cf-desc code, .cf-hint code { font-family: var(--mono); color: var(--accent); font-size: .9em; }
.dropzone {
  display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 90px; padding: 1rem; cursor: pointer;
  border: 1.5px dashed var(--border); border-radius: 12px; background: #0d1017;
  color: var(--muted); font-size: .92rem; transition: border-color .15s, background .15s;
}
.dropzone:hover { border-color: #3a465b; }
.dropzone.dragover { border-color: var(--accent); background: #0c2019; color: var(--text); }
.dropzone b { color: var(--text); font-family: var(--mono); }
.cf-foot { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; }
.cf-adv { color: var(--muted); font-size: .85rem; flex: 1 1 auto; }
.cf-adv > summary { cursor: pointer; color: var(--accent-2); font-family: var(--mono); font-size: .8rem; width: fit-content; }
.cf-adv .ctl { margin-top: .6rem; }
.cf-offset {
  width: 8rem; background: var(--bg-elev); color: var(--text); border: 1px solid var(--border);
  border-radius: 7px; padding: .35rem .55rem; font-family: var(--mono); font-size: .85rem;
}
.cf-hint { display: block; margin-top: .4rem; color: var(--muted); font-size: .8rem; max-width: 62ch; }
.custom-flash .btn { width: auto; padding-inline: 1.4rem; }
.cf-adv-body { margin-top: .6rem; }
.cf-parts { display: flex; flex-direction: column; gap: .5rem; margin: .6rem 0; }
.cf-part { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.cf-file {
  cursor: pointer; display: inline-flex; align-items: center; gap: .4rem;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 7px;
  padding: .35rem .6rem; font-size: .82rem; color: var(--accent-2); min-width: 12rem;
}
.cf-file:hover { border-color: #3a465b; }
.cf-fname { color: var(--text); font-family: var(--mono); font-size: .8rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 16rem; }
.cf-remove {
  cursor: pointer; background: transparent; border: 1px solid var(--border); border-radius: 7px;
  color: var(--muted); font-size: .8rem; padding: .3rem .5rem; line-height: 1;
}
.cf-remove:hover { color: #ff8080; border-color: #6b2b2b; }
.custom-flash .cf-adv .btn.secondary { width: auto; padding: .35rem .7rem; font-size: .8rem; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 3rem; color: var(--muted); font-size: .9rem;
  flex-shrink: 0;
}
.site-footer p { margin: .5rem 0; }
.muted { color: var(--muted); }
.site-footer a { color: var(--accent-2); }

.ctl { display: inline-flex; align-items: center; gap: .4rem; color: var(--muted); font-size: .85rem; }
.ctl-check { gap: .35rem; }
.ctl select {
  background: var(--bg-elev); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: .4rem .55rem;
  font-family: var(--mono); font-size: .85rem;
}

/* serial monitor (xterm, full-height) */
.serial-page { height: 100dvh; overflow: hidden; }
.site-header.compact { padding: .7rem 0; flex-shrink: 0; }
.term-main {
  flex: 1 1 auto; min-height: 0;
  width: min(1200px, 96vw); margin-inline: auto;
  display: flex; flex-direction: column; gap: .55rem; padding-bottom: .7rem;
}
.term-toolbar { display: flex; align-items: center; gap: .45rem .55rem; flex-wrap: wrap; flex-shrink: 0; }
.term-toolbar .btn { width: auto; padding: .4rem .75rem; font-size: .82rem; }
.term-toolbar .ctl { font-size: .76rem; gap: .3rem; }
.term-toolbar select {
  background: var(--bg-elev); color: var(--text); border: 1px solid var(--border);
  border-radius: 7px; padding: .28rem .35rem; font-family: var(--mono); font-size: .76rem;
}
.term-search {
  background: var(--bg-elev); color: var(--text); border: 1px solid var(--border);
  border-radius: 7px; padding: .32rem .55rem; font-size: .8rem;
  flex: 1 1 130px; min-width: 120px; max-width: 240px;
}
.term-search:focus { outline: none; border-color: var(--accent-2); }
.term-status {
  margin-left: auto; font-family: var(--mono); font-size: .76rem; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: .2rem .65rem; white-space: nowrap;
}
.term-status.ok { color: var(--accent); border-color: var(--accent); }
.xterm-host {
  flex: 1 1 auto; min-height: 0; box-sizing: border-box;
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  background: #07090d; padding: 8px 6px 6px 8px;
}
.xterm-host .xterm { height: 100%; }

/* quick-send macros + control keys */
.quick-send { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; flex-shrink: 0; }
.quick-send.collapsed { display: none; }
/* the ⌨ toggle lives in the input row, so it never costs an extra row */
.qs-toggle-btn { width: auto; padding: .6rem .75rem; font-size: 1rem; line-height: 1; }
.qs-toggle-btn.active { color: var(--accent); border-color: var(--accent); }
.qs-label { color: var(--muted); font-size: .7rem; text-transform: uppercase; letter-spacing: .05em; font-weight: 700; margin-right: .1rem; }
.qs-btn {
  cursor: pointer; font-family: var(--sans); font-size: .78rem; font-weight: 600;
  color: var(--accent); background: transparent; border: 1px solid var(--border);
  border-radius: 7px; padding: .3rem .65rem;
}
.qs-btn:hover:not(:disabled) { border-color: var(--accent); }
.qs-btn:disabled { opacity: .4; cursor: not-allowed; }
.qs-ctrl { color: var(--accent-2); font-family: var(--mono); }
.qs-sep { width: 1px; height: 1.3em; background: var(--border); margin: 0 .35rem; }

.term-input { display: flex; gap: .55rem; flex-shrink: 0; }
.term-input input {
  flex: 1; background: var(--bg-elev); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px; padding: .6rem .85rem;
  font-family: var(--mono); font-size: .88rem;
}
.term-input input:focus { outline: none; border-color: var(--accent-2); }
.term-input .btn { width: auto; padding-inline: 1.3rem; }
.term-input input:disabled { opacity: .5; }