/* ================================================================
   reTerminal E-Series Firmware Hub
   Platform-first setup flow with a persistent monitor
   ================================================================ */

:root {
  --bg: #eef3ef;
  --paper: rgba(255, 255, 255, .88);
  --paper-strong: #ffffff;
  --ink: #142023;
  --muted: #657175;
  --line: rgba(197, 212, 207, .78);
  --line-dark: #9cafaa;
  --brand: #004966;
  --brand-hover: #013b52;
  --brand-soft: #e5f0f1;
  --seeed: #8FC31F;
  --seeed-soft: #f0f8dc;
  --orange: #f08a24;
  --orange-soft: #fff3e6;
  --cyan: #20a7b3;
  --cyan-soft: #e8f8fa;
  --console: #0d1517;
  --shadow: 0 1px 2px rgba(18, 28, 30, .06), 0 18px 42px rgba(18, 28, 30, .09);
  --shadow-hover: 0 24px 54px rgba(18, 28, 30, .16);
  --topbar-h: 60px;
  --frame: min(82%, 1480px);
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background:
    linear-gradient(115deg, rgba(0, 73, 102, .13), transparent 35%),
    linear-gradient(245deg, rgba(143, 195, 31, .15), transparent 33%),
    linear-gradient(180deg, #fbfcf9 0%, #eef4ef 44%, #e5eeeb 100%),
    var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", Inter, "Segoe UI", sans-serif;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  overflow-y: auto;
}

.page-backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(rgba(0, 73, 102, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 73, 102, .045) 1px, transparent 1px),
    linear-gradient(135deg, rgba(255, 255, 255, .48), transparent 42%);
  background-size: 42px 42px, 42px 42px, 100% 100%;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .75), transparent 78%);
}

button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, p { margin: 0; }

.is-hidden { display: none !important; }

/* --- Topbar ------------------------------------------------------- */
.topbar {
  flex: 0 0 var(--topbar-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(191, 209, 204, .72);
  background: rgba(250, 252, 249, .78);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  box-shadow: 0 10px 34px rgba(11, 28, 33, .06);
}

.topbar-inner {
  width: var(--frame);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: inherit;
}
.brand:hover { text-decoration: none; }

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 7px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand), #0b6a76);
  box-shadow: 0 10px 22px rgba(0, 73, 102, .24);
}
.brand-logo img {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text b { font-size: 14px; font-weight: 700; letter-spacing: 0; }
.brand-text small { font-size: 11px; color: var(--muted); }

.topbar-links {
  display: flex;
  align-items: center;
  gap: 14px;
}

.topbar-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 500;
}
.topbar-link:hover { color: var(--ink); text-decoration: none; }
.nav-icon {
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
}

/* --- App shell ---------------------------------------------------- */
.app {
  flex: 1 1 auto;
  min-height: calc(100vh - var(--topbar-h));
  width: var(--frame);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(370px, .62fr);
  gap: 26px;
  padding: 26px 0 34px;
}

.flow-col,
.monitor-col { min-height: 0; }

.flow-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.monitor-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: calc(var(--topbar-h) + 28px);
  align-self: start;
  height: calc(100vh - var(--topbar-h) - 60px);
  max-height: calc(100vh - var(--topbar-h) - 60px);
}

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.panel-heading,
.console-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.eyebrow {
  color: #657a7d;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h2 { font-size: 23px; font-weight: 700; letter-spacing: 0; }
h3 { font-size: 16px; font-weight: 700; letter-spacing: 0; }
p { color: var(--muted); }

h1 {
  max-width: 720px;
  color: #102022;
  font-size: clamp(34px, 4vw, 56px);
  font-weight: 760;
  letter-spacing: 0;
  line-height: .98;
}

/* --- Hero --------------------------------------------------------- */
.hero-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .48fr);
  gap: 24px;
  min-height: 288px;
  overflow: hidden;
  border: 1px solid rgba(178, 202, 197, .78);
  border-radius: 20px;
  padding: 28px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .94), rgba(239, 249, 245, .78)),
    linear-gradient(115deg, rgba(32, 167, 179, .18), transparent 46%);
  box-shadow: 0 24px 64px rgba(17, 44, 49, .14);
  transition: min-height .28s ease, padding .28s ease, border-radius .28s ease, box-shadow .28s ease;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0, 73, 102, .08) 1px, transparent 1px),
    linear-gradient(rgba(0, 73, 102, .06) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(90deg, transparent, #000 22%, #000 74%, transparent);
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 1;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.hero-sub {
  max-width: 58ch;
  color: #536368;
  font-size: 15px;
}

.hero-buy-link {
  position: absolute;
  right: 30px;
  bottom: 26px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  border: 1px solid rgba(143, 195, 31, .68);
  border-radius: 999px;
  padding: 12px 16px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .94), rgba(240, 248, 220, .9));
  color: color-mix(in srgb, var(--brand) 88%, #1c3136);
  font-size: 13px;
  font-weight: 820;
  line-height: 1;
  box-shadow: 0 16px 32px rgba(17, 44, 49, .14);
}

.hero-buy-link:hover {
  border-color: rgba(143, 195, 31, .9);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .98), rgba(229, 246, 178, .9));
  color: color-mix(in srgb, var(--brand) 78%, #22353a);
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-buy-link svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
  flex: 0 0 15px;
}

.hero-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin-top: 8px;
}

.hero-step {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  white-space: nowrap;
}

.hero-step:not(:last-child)::after {
  content: "";
  display: block;
  width: 44px;
  height: 1px;
  margin: 0 12px;
  background: rgba(156, 175, 170, .82);
}

.hero-step b {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(176, 199, 195, .86);
  border-radius: 999px;
  background: rgba(255, 255, 255, .82);
  color: var(--brand);
  font-size: 12px;
  font-weight: 850;
  line-height: 1;
}

.hero-step small {
  font-size: 12px;
}

body:not(.has-selection) .hero-step[data-step="1"] b,
.has-selection:not(.is-flash-step) .hero-step[data-step="2"] b,
.is-flash-step .hero-step[data-step="3"] b {
  border-color: var(--brand);
  background: linear-gradient(135deg, var(--brand), #087285);
  color: #fff;
  box-shadow: 0 10px 22px rgba(0, 73, 102, .18);
}

body:not(.has-selection) .hero-step[data-step="1"] small,
.has-selection:not(.is-flash-step) .hero-step[data-step="2"] small,
.is-flash-step .hero-step[data-step="3"] small {
  color: var(--ink);
}

.has-selection .hero-step[data-step="1"] b,
.is-flash-step .hero-step[data-step="2"] b {
  border-color: rgba(143, 195, 31, .72);
  background: var(--seeed-soft);
  color: #46600f;
}

.has-selection .hero-step[data-step="1"]::after,
.is-flash-step .hero-step[data-step="2"]::after {
  background: var(--seeed);
}

.hero-visual {
  display: grid;
  place-items: center;
  min-height: 230px;
}

.device-stack {
  position: relative;
  width: min(100%, 330px);
  aspect-ratio: 1.15;
}

.device-stack img {
  position: absolute;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 24px 22px rgba(22, 38, 40, .18));
}

.device-stack-main {
  inset: 18% 6% 8% 8%;
  width: 86%;
  height: 74%;
}

.device-stack-small {
  border: 1px solid rgba(176, 199, 195, .86);
  border-radius: 14px;
  padding: 8px;
  background: rgba(255, 255, 255, .82);
}

.device-stack-small-a {
  top: 0;
  left: 0;
  width: 42%;
  height: 35%;
}

.device-stack-small-b {
  right: 0;
  bottom: 2%;
  width: 48%;
  height: 38%;
}

.has-selection .hero-panel {
  grid-template-columns: 1fr;
  min-height: 0;
  padding: 18px 22px;
  border-radius: 16px;
  box-shadow: 0 16px 42px rgba(17, 44, 49, .11);
}

.has-selection .hero-copy {
  gap: 8px;
  padding-right: 260px;
}

.has-selection h1 {
  max-width: 760px;
  font-size: clamp(25px, 2.7vw, 36px);
  line-height: 1.05;
}

.has-selection .hero-sub {
  display: none;
}

.has-selection .hero-buy-link {
  right: 22px;
  bottom: 18px;
  padding: 10px 14px;
  font-size: 12px;
}

.has-selection .hero-steps {
  margin-top: 4px;
}

.has-selection .hero-step b {
  width: 26px;
  height: 26px;
  font-size: 11px;
}

.has-selection .hero-visual {
  display: none;
}

/* --- Platform selection ------------------------------------------ */
.selection-panel {
  max-height: none;
  overflow: visible;
  transition:
    max-height .34s ease,
    opacity .24s ease,
    transform .24s ease,
    padding .24s ease,
    border-width .24s ease;
}

.selection-panel.is-collapsed {
  max-height: 0;
  overflow: hidden;
  padding-top: 0;
  padding-bottom: 0;
  border-width: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
}

.col-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px 32px;
  margin-bottom: 24px;
}

.col-head-titles {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.col-sub {
  font-size: 13.5px;
  color: var(--muted);
  max-width: 60ch;
}

.platform-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.platform-group {
  display: grid;
  gap: 12px;
}

.platform-group + .platform-group {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.platform-group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.platform-group-head h3 {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.2;
}

.platform-group-head p {
  max-width: 46ch;
  color: var(--muted);
  font-size: 12.5px;
  text-align: right;
}

.platform-group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.platform-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .95), rgba(244, 249, 247, .9)),
    linear-gradient(90deg, color-mix(in srgb, var(--platform-accent) 16%, transparent), transparent 55%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .88) inset;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.platform-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: linear-gradient(135deg, color-mix(in srgb, var(--platform-accent) 16%, transparent), transparent 42%);
  opacity: .62;
}
.platform-card:hover {
  border-color: color-mix(in srgb, var(--platform-accent) 45%, var(--line));
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.platform-card.is-expanded {
  grid-column: 1 / -1;
  border-color: var(--platform-accent);
  box-shadow: 0 0 0 4px rgba(143, 195, 31, .14), var(--shadow-hover);
}

.platform-card-main {
  position: relative;
  z-index: 1;
  width: 100%;
  border: 0;
  padding: 18px 18px 17px;
  background: transparent;
  color: inherit;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  text-align: left;
}

.platform-logo-wrap {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border: 1px solid rgba(176, 199, 195, .82);
  border-radius: 14px;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 12px 28px rgba(20, 34, 36, .08);
}
.platform-logo-wrap img {
  max-width: 44px;
  max-height: 44px;
  object-fit: contain;
}

.platform-card-copy {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}
.platform-card-copy strong {
  color: var(--ink);
  font-size: 20px;
  font-weight: 750;
}
.platform-card-copy span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}
.community-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  position: relative;
  z-index: 1;
  margin: -8px 18px 14px;
  padding-left: 78px;
}
.community-author,
.community-source {
  width: fit-content;
  border: 1px solid rgba(176, 199, 195, .72);
  border-radius: 999px;
  padding: 4px 8px;
  background: rgba(255, 255, 255, .72);
  color: #526266;
  font-size: 11px;
  font-weight: 650;
  line-height: 1;
}
.community-author strong {
  color: var(--ink);
  font-size: inherit;
  font-weight: 760;
}
.community-source {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: color-mix(in srgb, var(--platform-accent) 76%, #25373b);
}
.community-source:hover {
  border-color: color-mix(in srgb, var(--platform-accent) 34%, var(--line));
  background: rgba(240, 248, 220, .78);
  text-decoration: none;
}
.community-source svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
  flex: 0 0 13px;
}
.community-meta-selected {
  margin: 2px 0 10px;
  padding-left: 0;
}

.platform-card-action {
  border: 1px solid color-mix(in srgb, var(--platform-accent) 25%, var(--line));
  border-radius: 999px;
  padding: 7px 11px;
  background: rgba(255, 255, 255, .72);
  color: color-mix(in srgb, var(--platform-accent) 78%, #263336);
  font-size: 11px;
  font-weight: 750;
  white-space: nowrap;
}
.platform-card.is-expanded .platform-card-action {
  border-color: rgba(143, 195, 31, .44);
  background: rgba(240, 248, 220, .86);
  color: #46600f;
}

.platform-detail {
  position: relative;
  z-index: 1;
  display: none;
  grid-template-columns: minmax(0, .85fr) minmax(260px, .75fr);
  gap: 18px;
  padding: 0 18px 18px;
  animation: detailReveal .3s ease both;
}
.platform-card.is-expanded .platform-detail { display: grid; }

@keyframes detailReveal {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.platform-detail-copy {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.platform-detail-copy p {
  margin-bottom: 12px;
  font-size: 13px;
}
.platform-detail-copy ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 17px;
  color: #415053;
  font-size: 12.5px;
}

.platform-preview {
  min-height: 180px;
  margin: 0;
  border: 1px solid rgba(176, 199, 195, .84);
  border-radius: 14px;
  background: #eef5f2;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .7);
}
.platform-preview img {
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
  display: block;
}

.device-choice {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(180px, .25fr) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.device-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
}

.device-option {
  min-height: 138px;
  border: 1px solid rgba(156, 175, 170, .82);
  border-radius: 14px;
  padding: 11px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .94), rgba(248, 251, 249, .86));
  color: var(--ink);
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: left;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}
.device-option:hover {
  border-color: var(--seeed);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .96), rgba(240, 248, 220, .88));
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(38, 60, 35, .09);
}
.device-image {
  display: block;
  min-width: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid rgba(193, 210, 205, .9);
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(229, 240, 241, .68), rgba(255, 255, 255, .9));
}
.device-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.device-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}
.device-copy strong { font-size: 14px; line-height: 1.25; }
.device-copy > span:not(.device-specs) {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}
.device-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.device-specs span {
  border-radius: 999px;
  padding: 3px 7px;
  background: rgba(229, 240, 241, .86);
  color: #425052;
  font-size: 10px;
  font-weight: 700;
}

.base-detail-content {
  display: grid;
  gap: 18px;
}

.base-detail-copy {
  border: 1px solid rgba(176, 199, 195, .76);
  border-radius: 14px;
  padding: 14px 15px;
  background: rgba(250, 252, 251, .76);
}

.base-detail-copy p {
  color: #46585c;
  font-size: 13.5px;
}

.base-detail-device-choice {
  display: grid;
  grid-template-columns: minmax(180px, .25fr) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

/* --- Progressive panels ------------------------------------------ */
.step-panel.is-hidden { display: none; }
.step-panel.is-visible { animation: stepReveal .36s ease var(--step-delay, 0ms) both; }

@keyframes stepReveal {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.selected-release {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 15px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .92), rgba(240, 248, 220, .28)),
    rgba(250, 252, 251, .86);
}

.selected-device-photo {
  display: flex;
  align-items: center;
  justify-content: center;
}
.selected-device-photo img {
  width: 200px;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  border: 1px solid rgba(197, 212, 207, .78);
  border-radius: 16px;
  padding: 10px;
  background: rgba(255, 255, 255, .76);
  filter: drop-shadow(0 18px 18px rgba(22, 38, 40, .12));
}
.selected-copy { min-width: 0; }
.selected-copy h3 { margin-bottom: 5px; }
.selected-copy p {
  margin-bottom: 10px;
  font-size: 13px;
  line-height: 1.5;
}

.selected-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 9px;
}

.tag {
  width: fit-content;
  border-radius: 999px;
  padding: 4px 10px;
  background: #eef3f1;
  color: #4b5563;
  font-size: 11px;
  font-weight: 700;
}
.tag-platform { background: var(--cyan-soft); color: #17636b; }
.tag-device { background: var(--seeed-soft); color: #46600f; }

.compat-list { display: flex; gap: 4px; flex-wrap: wrap; }
.compat-badge {
  padding: 2px 7px;
  border-radius: 999px;
  background: #edf3f1;
  color: #626b68;
  font-size: 10px;
  font-weight: 600;
}
.compat-badge.active { background: var(--seeed-soft); color: #46600f; }

.setup-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 16px;
}

.config-area {
  display: grid;
  gap: 12px;
}

.field-block {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.field-block span {
  color: #3f484b;
  font-size: 12px;
  font-weight: 700;
}

.field-block select,
.field-block input:not([type="checkbox"]) {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, .88);
  color: var(--ink);
  font-size: 13px;
}
.field-block select:focus,
.field-block input:not([type="checkbox"]):focus {
  outline: 3px solid rgba(143, 195, 31, .22);
  border-color: var(--seeed);
}

.field-block--checkbox {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  min-height: 40px;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, .88);
  cursor: pointer;
}
.field-block--checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--seeed);
  cursor: pointer;
  flex-shrink: 0;
}

.field-block--template-options {
  grid-column: 1 / -1;
}

.template-options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.template-options-grid .field-block--checkbox {
  min-height: 36px;
  padding: 6px 10px;
}

.template-options-grid .field-block--checkbox span {
  line-height: 1.25;
}

.template-options-grid .field-block--checkbox small {
  color: #6f7976;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.25;
}

.template-preview {
  margin: 0 0 16px;
}
.template-code {
  min-height: min(320px, 54vh);
  max-height: min(72vh, 680px);
  overflow: auto;
  margin: 0;
  border: 1px solid rgba(176, 199, 195, .82);
  border-radius: 14px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(245, 250, 248, .86));
  color: #243235;
  font: 12px/1.6 ui-monospace, 'SFMono-Regular', 'Cascadia Mono', Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .8);
}
.template-export-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.config-empty {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: rgba(250, 252, 251, .86);
}
.config-empty strong { color: #343d40; font-size: 13px; }
.config-empty span { color: var(--muted); font-size: 12.5px; }

.install-mode {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.mode-button {
  min-height: 34px;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, .88);
  color: #343d40;
  font-size: 12px;
  font-weight: 700;
}
.mode-button.is-active {
  border-color: var(--cyan);
  background: var(--cyan-soft);
  color: #17636b;
  box-shadow: 0 0 0 3px rgba(32, 167, 179, .12);
}
.mode-button:disabled {
  color: #8e9794;
  background: #f6f8f7;
}

.progress-row { margin: 18px 0; }
.progress-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 7px;
  font-size: 12.5px;
  font-weight: 700;
}
.progress-row small { color: var(--muted); font-size: 11.5px; }
.progress-track {
  height: 10px;
  overflow: hidden;
  margin-bottom: 6px;
  border-radius: 999px;
  background: rgba(210, 222, 218, .92);
  box-shadow: inset 0 1px 2px rgba(17, 31, 34, .08);
}
.progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand), var(--cyan), var(--seeed));
  transition: width .15s ease;
  box-shadow: 0 0 18px rgba(32, 167, 179, .42);
}

.flash-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.flash-hint { font-size: 11.5px; color: var(--muted); }

/* --- Persistent monitor ------------------------------------------ */
#baseBringup {
  flex: 0 0 auto;
}

.base-bringup-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  width: 100%;
  border: 1px solid rgba(176, 199, 195, .72);
  border-radius: 14px;
  padding: 12px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .78), rgba(241, 247, 245, .7));
  color: var(--ink);
  text-align: left;
  box-shadow: 0 1px 0 rgba(255, 255, 255, .75) inset;
  transition: border-color .16s ease, background .16s ease, transform .16s ease, box-shadow .16s ease;
}

.base-bringup-card:hover {
  border-color: rgba(143, 195, 31, .62);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .92), rgba(240, 248, 220, .68));
  box-shadow: 0 12px 28px rgba(18, 28, 30, .08);
  transform: translateY(-1px);
}

.base-bringup-logo {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(176, 199, 195, .72);
  border-radius: 10px;
  background: rgba(255, 255, 255, .78);
}

.base-bringup-logo img {
  max-width: 28px;
  max-height: 28px;
  object-fit: contain;
}

.base-bringup-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 3px;
}

.base-bringup-copy strong {
  color: #243235;
  font-size: 13px;
  font-weight: 760;
}

.base-bringup-copy span {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.35;
}

.base-bringup-arrow {
  color: color-mix(in srgb, var(--brand) 72%, #5b686b);
  font-size: 20px;
  line-height: 1;
}

.console-panel {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  width: 100%;
  min-height: 0;
  max-height: inherit;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .9), rgba(236, 244, 242, .82)),
    rgba(255, 255, 255, .82);
}

.console-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.monitor-led {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, .9);
  border-radius: 50%;
  background: #d94b42;
  box-shadow: 0 0 0 1px rgba(217, 75, 66, .42);
}

.monitor-led.state-connected,
.monitor-led.state-success {
  background: var(--seeed);
  box-shadow: 0 0 0 1px rgba(143, 195, 31, .42);
}

.monitor-led.state-connecting {
  background: var(--orange);
  box-shadow: 0 0 0 1px rgba(238, 129, 52, .42);
}

.monitor-led.state-error,
.monitor-led.state-disconnected {
  background: #d94b42;
  box-shadow: 0 0 0 1px rgba(217, 75, 66, .42);
}

.monitor-settings {
  display: grid;
  gap: 10px;
  margin: 8px 0 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(176, 199, 195, .7);
}

.monitor-setting-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
}

.monitor-setting-row label,
.monitor-setting-row span {
  color: var(--ink);
  font-size: 13px;
  font-weight: 750;
}

.monitor-setting-row select {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 38px;
  border: 1px solid rgba(176, 199, 195, .88);
  border-radius: 9px;
  padding: 8px 11px;
  background: rgba(255, 255, 255, .86);
  color: #243235;
  font: inherit;
  font-size: 13px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .74);
}

.monitor-port-status {
  color: #6f7774;
  font-size: 13px;
  font-weight: 650;
}

.monitor-setting-row b {
  color: #3d8a09;
  font-size: 13px;
}

.monitor-setting-row b.state-disconnected {
  color: #6f7774;
}

.monitor-setting-row b.state-error {
  color: #9b4d11;
}

.monitor-connection-actions {
  justify-content: flex-start;
  margin: 0 0 12px;
}

.monitor-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.monitor-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

pre#log {
  flex: 1 1 auto;
  min-height: 220px;
  overflow: auto;
  margin: 0;
  border: 1px solid rgba(176, 199, 195, .82);
  border-radius: 16px;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(245, 250, 248, .86)),
    repeating-linear-gradient(0deg, rgba(0, 73, 102, .035) 0 1px, transparent 1px 28px);
  color: #243235;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .8),
    0 14px 30px rgba(18, 28, 30, .08);
  font: 12px/1.6 ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
  white-space: pre-wrap;
}

/* --- Buttons ------------------------------------------------------ */
.button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 38px;
  border: 1px solid var(--brand);
  border-radius: 10px;
  padding: 8px 14px;
  background: linear-gradient(135deg, var(--brand), #087285);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(0, 73, 102, .18);
  transition: background .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.button:hover:not(:disabled) {
  border-color: var(--brand-hover);
  background: linear-gradient(135deg, var(--brand-hover), #075b6a);
  box-shadow: 0 16px 30px rgba(0, 73, 102, .22);
}
.button:active:not(:disabled) { transform: scale(0.97); }
.button:disabled { opacity: .44; }
.button-flash {
  min-height: 42px;
  padding: 10px 19px;
  background: linear-gradient(135deg, #0b596c, var(--cyan), var(--seeed));
}
.button-small { min-height: 30px; padding: 5px 11px; border-radius: 9px; font-size: 11px; }
.button-secondary {
  border-color: var(--line-dark);
  background: rgba(255, 255, 255, .86);
  color: #343d40;
  box-shadow: none;
}
.button-secondary:hover:not(:disabled) {
  border-color: var(--seeed);
  background: var(--seeed-soft);
  box-shadow: 0 10px 22px rgba(86, 117, 25, .1);
}

/* --- Serial status pill ------------------------------------------ */
.serial-status {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(158, 174, 169, .62);
  border-radius: 999px;
  padding: 5px 10px;
  background: rgba(238, 242, 240, .86);
  color: #6f7774;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}
.serial-status i { width: 7px; height: 7px; border-radius: 50%; background: #9aa39f; }
.serial-status.state-connecting { background: #fff2dc; color: #97551e; }
.serial-status.state-connecting i { background: var(--orange); }
.serial-status.state-connected,
.serial-status.state-success { background: var(--seeed-soft); color: #46600f; }
.serial-status.state-connected i,
.serial-status.state-success i { background: var(--seeed); }
.serial-status.state-error { background: var(--orange-soft); color: #9b4d11; }
.serial-status.state-error i { background: var(--orange); }

/* --- Alerts ------------------------------------------------------- */
.alert {
  display: none;
  gap: 6px;
  border-radius: 12px;
  padding: 11px 13px;
  font-size: 13px;
}
.alert.is-visible { display: flex; flex-wrap: wrap; }
.alert-warning { border: 1px solid #f3b36d; background: var(--orange-soft); color: #8a4b12; }
.alert-info { border: 1px solid #7ec8e3; background: #eef7fb; color: #1a5276; }
.selection-panel .alert.is-visible { margin-bottom: 14px; }
.flash-panel .alert.is-visible { margin: 12px 0 0; }
.flash-panel .erase-note.is-visible { margin: 0 0 12px; }
.flash-panel .install-note.is-visible { margin: 0 0 12px; }

/* --- Flash button ------------------------------------------------- */
#flashButton:disabled { opacity: 0.5; cursor: not-allowed; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}

/* --- Responsive --------------------------------------------------- */
@media (max-width: 1400px) {
  :root { --frame: min(90%, 1280px); }
}

@media (max-width: 1080px), (max-height: 680px) {
  :root { --frame: 90%; }
  .app {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 24px 0 32px;
    gap: 22px;
  }
  .monitor-col {
    position: static;
    height: auto;
    max-height: none;
  }
  .monitor-col { min-height: 360px; }
  pre#log { min-height: 240px; max-height: 420px; }
  .hero-panel { grid-template-columns: 1fr; }
  .hero-visual { min-height: 220px; }
  .has-selection .hero-panel { grid-template-columns: 1fr; }
  .has-selection .hero-visual { display: none; }
}

@media (max-width: 820px) {
  .platform-group-grid,
  .platform-detail,
  .device-choice,
  .setup-grid {
    grid-template-columns: 1fr;
  }
  .template-options-grid {
    grid-template-columns: 1fr;
  }
  h1 { font-size: clamp(31px, 9vw, 44px); }
  .hero-buy-link {
    position: relative;
    right: auto;
    bottom: auto;
    justify-self: start;
    margin-top: -6px;
  }
  .has-selection .hero-copy { padding-right: 0; }
  .has-selection .hero-buy-link {
    right: auto;
    bottom: auto;
  }
}

@media (max-width: 560px) {
  :root { --frame: 92%; }
  .topbar-links { gap: 10px; }
  .topbar-links a { display: none; }
  .hero-panel {
    min-height: 0;
    padding: 20px;
    border-radius: 16px;
  }
  .hero-steps { gap: 10px 0; }
  .hero-step:not(:last-child)::after {
    width: 28px;
    margin: 0 8px;
  }
  .hero-visual { display: none; }
  .panel { padding: 16px; }
  .platform-card-main {
    grid-template-columns: 54px minmax(0, 1fr);
    align-items: start;
  }
  .platform-logo-wrap {
    width: 54px;
    height: 54px;
  }
  .community-meta {
    margin-top: -8px;
    padding-left: 68px;
  }
  .platform-card-action { grid-column: 2; width: fit-content; }
  .platform-group-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }
  .platform-group-head p { text-align: left; }
  .panel-heading,
  .console-heading,
  .monitor-actions {
    align-items: flex-start;
    flex-direction: column;
  }
  .monitor-setting-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .device-option {
    grid-template-columns: 90px minmax(0, 1fr);
    min-height: 128px;
  }
  .selected-release { grid-template-columns: 1fr; }
  .selected-device-photo { display: none; }
}