:root{
  /* ===== Sci-Fi Light Theme ===== */
  --bg: #f6f8fb;              /* white-ish */
  --panel: #ffffff;           /* cards */
  --text: #101827;            /* near-black */
  --muted: #55657a;           /* slate */
  --line: #d7dde7;            /* soft border */
  --shadow: 0 14px 40px rgba(10, 16, 30, .10);

  --orange: #ff6a00;          /* primary */
  --orange2:#ff8a2a;          /* secondary */
  --blue: #1578ff;            /* accent */
  --blue2:#35b7ff;            /* accent 2 */
  --metal:#9aa6b2;            /* metallic hint */
  --graphite:#2a3342;         /* deep metal */

  --radius: 8px;
  --max: 1120px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

/* ===== Global ===== */
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family:var(--sans);
  color:var(--text);
  background-image:
    linear-gradient(rgba(16,24,39,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,24,39,.035) 1px, transparent 1px),
    linear-gradient(180deg, #ffffff, var(--bg) 65%);
  background-size: 44px 44px, 44px 44px, auto;
  background-position: 0 0, 0 0, center;

  line-height:1.6;
}

a{ color: var(--blue); text-decoration:none; }
a:hover{ text-decoration:underline; }

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px;
}

/* ===== Header / Nav ===== */
header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid rgba(215,221,231,.8);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
}

.brand{
  display:flex;
  align-items:center;
  flex: 0 1 310px;
  min-width: 190px;
}

.brand:hover{
  text-decoration:none;
}

.brandLogo{
  display:block;
  width: min(300px, 100%);
  height: auto;
}

.navlinks{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill{
  display:inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.80);
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
  position:relative;
}

.pill:hover{
  text-decoration:none;
  border-color: rgba(21,120,255,.35);
  box-shadow: 0 8px 18px rgba(21,120,255,.10);
}

/* current page hint */
.pill[aria-current="page"]{
  border-color: rgba(255,106,0,.55);
  box-shadow: 0 10px 22px rgba(255,106,0,.14);
}

@media (max-width: 760px){
  .nav{
    align-items:flex-start;
    flex-direction:column;
  }

  .brand{
    width: min(320px, 100%);
    flex-basis:auto;
  }
}

/* ===== Cards / Layout ===== */
.grid{
  display:grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 18px;
  align-items: stretch;
}
@media (max-width: 900px){
  .grid{ grid-template-columns: 1fr; }
}

.siteBanner{
  margin-bottom: 18px;
  padding: 18px;
  border: 1px solid rgba(215,221,231,.9);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,.96), rgba(246,248,251,.90));
  box-shadow: var(--shadow);
}

.siteBanner img{
  display:block;
  width: min(760px, 100%);
  height: auto;
  margin: 0 auto;
}

@media (max-width: 620px){
  .siteBanner{
    padding: 12px;
  }
}

.card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  position: relative;
  overflow: hidden;
}

/* sci-fi panel edge glow */
.card::before{
  content:"";
  position:absolute;
  inset: -2px;
  border-radius: calc(var(--radius) + 2px);
  padding: 2px;
  background: linear-gradient(135deg,
    rgba(255,106,0,.35),
    rgba(21,120,255,.25),
    rgba(154,166,178,.18),
    rgba(255,138,42,.25));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events:none;
  opacity:.55;
}

.kicker{
  display:inline-block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(215,221,231,.9);
  background: rgba(246,248,251,.9);
  margin-bottom: 12px;
}

h1{
  margin: 0 0 10px;
  font-size: 42px;
  line-height: 1.12;
  letter-spacing: 0;
}
@media (max-width: 520px){
  h1{ font-size: 34px; }
}

h2{
  margin: 0 0 10px;
  font-size: 20px;
}

h3{
  margin: 18px 0 8px;
  font-size: 13px;
  font-family: var(--mono);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0;
}

p{ margin: 10px 0; }
.muted{ color: var(--muted); }
.small{ font-size: 14px; }
.mono{ font-family: var(--mono); }

/* ===== Buttons ===== */
.ctaRow{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn{
  display:inline-block;
  padding: 11px 14px;
  border-radius: 8px;
  font-weight: 900;
  color: white;
  border: 1px solid rgba(255,106,0,.55);
  background: linear-gradient(135deg, var(--orange), var(--orange2));
  box-shadow: 0 14px 30px rgba(255,106,0,.18);
}

.btn:hover{
  text-decoration:none;
  filter: brightness(1.03);
}

.btn.secondary{
  color: var(--text);
  background: linear-gradient(180deg, #ffffff, #f2f5fb);
  border-color: rgba(21,120,255,.35);
  box-shadow: 0 14px 30px rgba(21,120,255,.12);
}

/* ===== Notes ===== */
.note{
  border-left: 4px solid rgba(255,106,0,.85);
  padding: 10px 12px;
  background: rgba(255,106,0,.08);
  border-radius: 8px;
  margin-top: 14px;
}

/* ===== Lists ===== */
.list{
  margin: 12px 0 0;
  padding-left: 18px;
}
.list li{ margin: 6px 0; }

/* ===== Tables ===== */
.tableWrap{
  overflow:auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(246,248,251,.70);
  margin-top: 12px;
  max-width: 100%;
  min-width: 0;
}

table{
  border-collapse: collapse;
  width: 100%;
  min-width: 720px;
}

th, td{
  padding: 10px 12px;
  border-bottom: 1px solid rgba(215,221,231,.8);
  vertical-align: top;
}

th{
  text-align:left;
  font-size: 12px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0;
  background: linear-gradient(180deg, rgba(255,255,255,.95), rgba(246,248,251,.95));
}

tr:last-child td{ border-bottom:none; }

code{
  font-family: var(--mono);
  font-size: 13px;
  background: rgba(21,120,255,.08);
  border: 1px solid rgba(21,120,255,.20);
  padding: 2px 6px;
  border-radius: 8px;
}

/* ===== Callouts ===== */
.callout{
  border-left: 4px solid rgba(21,120,255,.75);
  padding: 10px 12px;
  background: rgba(21,120,255,.07);
  border-radius: 8px;
  margin-top: 12px;
}

/* ===== Firmware Flasher ===== */
.flasherPage{
  padding-top: 26px;
}

.flasherHero{
  max-width: 760px;
  margin-bottom: 18px;
}

.firmwareGrid{
  display:grid;
  grid-template-columns: minmax(0, 720px);
  gap: 18px;
}

@media (max-width: 820px){
  .firmwareGrid{ grid-template-columns: 1fr; }
}

.firmwarePanel{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.safetyBand{
  display:grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items:start;
  margin: 18px 0;
  padding: 16px 18px;
  border-radius: 8px;
  border: 1px solid rgba(255,106,0,.35);
  background: rgba(255,106,0,.09);
}

.safetyBand h2,
.safetyBand p{
  margin: 0;
}

.safetyBand p{
  margin-top: 4px;
}

.safetyIcon{
  width: 28px;
  height: 28px;
  display:grid;
  place-items:center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--orange);
  font-weight: 900;
}

.panelTop{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 16px;
}

.versionBadge{
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
  color: var(--graphite);
  border: 1px solid rgba(255,106,0,.45);
  background: rgba(255,106,0,.10);
  border-radius: 999px;
  padding: 6px 10px;
}

.boardSelectLabel{
  display:block;
  margin-top: 16px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.boardSelect{
  width: 100%;
  margin-top: 6px;
  padding: 10px 38px 10px 12px;
  border: 1px solid rgba(21,120,255,.28);
  border-radius: 8px;
  color: var(--text);
  background: #ffffff;
  font: inherit;
  font-weight: 800;
}

.boardSelect:focus{
  outline: 3px solid rgba(21,120,255,.16);
  border-color: rgba(21,120,255,.60);
}

.firmwareFacts{
  display:grid;
  gap: 8px;
  margin: 16px 0;
}

.firmwareFacts div{
  display:grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  align-items:baseline;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(215,221,231,.75);
}

.firmwareFacts div:last-child{ border-bottom:none; }

.firmwareFacts dt{
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.firmwareFacts dd{
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

.untestedNote{
  margin: -2px 0 16px;
  padding: 10px 12px;
  border: 1px solid rgba(255,106,0,.28);
  border-radius: 8px;
  background: rgba(255,106,0,.08);
  color: #7a3600;
  line-height: 1.45;
}

.untestedNote[hidden]{
  display:none;
}

.boardChooser .untestedNote{
  margin: 10px 0 0;
}

.installerBtn{
  width: 100%;
  text-align: center;
  cursor: pointer;
}

.downloadBtn{
  display:block;
  width: 100%;
  margin-top: 10px;
  text-align:center;
}

.installerOptions{
  min-height: 46px;
}

.loadingNote,
.downloadHelp{
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

esp-web-install-button{
  display:block;
  --esp-tools-button-color: var(--orange);
  --esp-tools-button-text-color: #ffffff;
  --esp-tools-button-border-radius: 8px;
}

esp-web-install-button[hidden]{
  display:none;
}

.unsupported{
  display:block;
  color: #8a3800;
  background: rgba(255,106,0,.10);
  border: 1px solid rgba(255,106,0,.25);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
}

.flashNotes{
  margin-top: 18px;
  border-left: 4px solid rgba(21,120,255,.75);
  padding: 16px 18px;
  background: rgba(21,120,255,.07);
  border-radius: 8px;
}

.helpLinks{
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.linkGrid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.linkGrid a{
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(246,248,251,.9);
  padding: 11px 12px;
  font-weight: 800;
}

.linkGrid a:hover{
  text-decoration:none;
  border-color: rgba(21,120,255,.35);
  box-shadow: 0 8px 18px rgba(21,120,255,.10);
}

@media (max-width: 680px){
  .linkGrid{ grid-template-columns: 1fr; }
  .safetyBand{ grid-template-columns: 1fr; }
}

/* ===== Schematics ===== */
.schematicPage{
  padding-top: 26px;
}

.schematicHero{
  max-width: 820px;
  margin-bottom: 18px;
}

.schematicApproach{
  display:grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: 18px;
  align-items:start;
  margin: 18px 0;
  padding: 18px;
  border: 1px solid rgba(21,120,255,.22);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.94), rgba(246,248,251,.88));
}

.approachGrid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.approachCard{
  min-height: 118px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.approachCard strong,
.approachCard span{
  display:block;
}

.approachCard strong{
  margin-bottom: 6px;
}

.approachCard span{
  color: var(--muted);
  font-size: 14px;
}

.netRecipe{
  grid-column: 1 / -1;
  padding: 12px 14px;
  border-left: 4px solid rgba(255,106,0,.78);
  border-radius: 8px;
  background: rgba(255,106,0,.07);
}

.netRecipe h3,
.netRecipe p{
  margin: 0;
}

.netRecipe p{
  margin-top: 6px;
}

.schematicLegend{
  display:grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  align-items:start;
  margin: 18px 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.86);
}

.wireKey{
  display:grid;
  gap: 10px;
}

.wireKey span{
  display:flex;
  gap: 10px;
  align-items:center;
  min-width: 0;
  font-weight: 800;
}

.wireKey i{
  width: 34px;
  height: 4px;
  flex: 0 0 auto;
  display:inline-block;
  border-radius: 999px;
}

.keyPower{ background:#ff6a00; }
.keyGround{ background:#2a3342; }
.keySignal{ background:#1578ff; }
.keyI2c{ background:#35b7ff; }

.schematicPanel{
  display:flex;
  flex-direction:column;
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  min-width: 0;
}

.schematicPanel > .panelTop{ order: 0; }
.schematicPanel > .boardChooser{ order: 1; }
.schematicPanel > .sheetGrid{ order: 2; }
.schematicPanel > .connectorMap{ order: 3; }
.schematicPanel > .pinGrid{ order: 4; }
.schematicPanel > .callout{ order: 5; }

.boardChooser{
  width: min(520px, 100%);
  margin-top: 12px;
}

.boardChooser label{
  display:block;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
}

[data-board-panel][hidden]{
  display:none;
}

.connectorMap{
  margin: 16px 0;
  padding: 16px;
  border: 1px solid rgba(215,221,231,.9);
  border-radius: 8px;
  background: rgba(246,248,251,.72);
}

.connectorMap h3{
  margin-top: 0;
}

.connectorGrid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.connectorGrid div{
  min-height: 128px;
  padding: 12px;
  border: 1px solid rgba(215,221,231,.9);
  border-radius: 8px;
  background: #ffffff;
}

.sheetGrid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 18px 0;
  min-width: 0;
}

.schematicSheet{
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  min-width: 0;
}

.schematicSheet a{
  display:block;
  overflow:auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid rgba(215,221,231,.9);
  border-radius: 6px;
  background: #ffffff;
  max-width: 100%;
  min-width: 0;
}

.schematicSheet img{
  display:block;
  width: 100%;
  max-width: 680px;
  min-width: 0;
  height: auto;
  margin: 0 auto;
}

.schematicSheet figcaption{
  margin-top: 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
}

.connectorGrid strong,
.connectorGrid p{
  display:block;
  margin: 0;
}

.connectorGrid p{
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.netName{
  display:inline-block;
  margin-bottom: 8px;
  padding: 3px 7px;
  border-radius: 6px;
  color: var(--graphite);
  background: rgba(21,120,255,.08);
  border: 1px solid rgba(21,120,255,.20);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
}

.schematicPanel h2{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}

.pinGrid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 18px;
  min-width: 0;
}

.pinTable{
  min-width: 0;
}

.pinGrid > *{
  min-width: 0;
}

.driverGrid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.checkGrid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 900px){
  .schematicApproach,
  .schematicLegend,
  .pinGrid,
  .driverGrid,
  .checkGrid{
    grid-template-columns: 1fr;
  }

  .approachGrid,
  .connectorGrid,
  .sheetGrid{
    grid-template-columns: 1fr;
  }
}

/* ===== Footer ===== */
footer{
  margin-top: 26px;
  border-top: 1px solid rgba(215,221,231,.9);
  padding: 18px 0;
  color: var(--muted);
  font-size: 14px;
}

.footerMeta{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 16px;
  flex-wrap:wrap;
}

.footerLinks{
  display:flex;
  gap: 10px 14px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.footerLinks a{
  color: var(--muted);
  text-decoration:none;
  font-weight:800;
}

.footerLinks a:hover{
  color: var(--blue);
}

.legalPage{
  padding-top: 26px;
}

.legalPage .card + .card{
  margin-top: 18px;
}

.legalGrid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.noticeList{
  margin: 10px 0 0;
  padding-left: 20px;
}

.noticeList li{
  margin: 8px 0;
}

.provenanceTable{
  width:100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 13px;
}

.tableScroll{
  overflow-x:auto;
  max-width:100%;
}

.provenanceTable th,
.provenanceTable td{
  border-bottom: 1px solid rgba(215,221,231,.9);
  padding: 8px;
  text-align:left;
  vertical-align:top;
}

.provenanceTable th{
  color: var(--graphite);
  font-size: 12px;
  text-transform: uppercase;
}

@media (max-width: 900px){
  .legalGrid{
    grid-template-columns: 1fr;
  }

  .footerLinks{
    justify-content:flex-start;
  }
}