:root {
  color-scheme: light;
  --canvas: #ecefe8;
  --paper: #f9faf6;
  --paper-strong: #ffffff;
  --ink: #14211c;
  --muted: #647069;
  --line: #ccd3cc;
  --line-strong: #9eaaa2;
  --device: #173b31;
  --device-deep: #0d2821;
  --signal: #d9ff63;
  --signal-deep: #b7dd3d;
  --orange: #ed7b3d;
  --warning-bg: #fff5de;
  --danger: #a9342c;
  --danger-bg: #fff0ed;
  --success: #1d6b4f;
  --shadow: 0 26px 70px rgb(20 33 28 / 12%);
  font: 16px/1.55 "Avenir Next", "Noto Sans SC", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--canvas); scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgb(20 33 28 / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(20 33 28 / 4%) 1px, transparent 1px),
    var(--canvas);
  background-size: 28px 28px;
  overflow-x: hidden;
}

button, input, select { font: inherit; }
button, input[type="checkbox"], input[type="file"], select { touch-action: manipulation; }
button { -webkit-tap-highlight-color: rgb(217 255 99 / 24%); }

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--paper-strong);
  background: var(--device-deep);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.app-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: max(34px, env(safe-area-inset-top)) max(0px, env(safe-area-inset-right)) max(72px, env(safe-area-inset-bottom)) max(0px, env(safe-area-inset-left));
}

.masthead {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  padding: 10px 0 30px;
}

.brand-mark {
  display: grid;
  place-content: center;
  width: 74px;
  height: 74px;
  border: 2px solid var(--ink);
  background: var(--signal);
  box-shadow: 7px 7px 0 var(--ink);
  font: 800 17px/1 "DIN Alternate", "Avenir Next", sans-serif;
  letter-spacing: .04em;
  transform: rotate(-2deg);
}

.brand-mark span:last-child { font-size: 11px; letter-spacing: .14em; }
.masthead-copy { min-width: 0; }
.eyebrow { margin: 0 0 5px; color: var(--success); font: 800 12px/1.2 "DIN Alternate", "Avenir Next", sans-serif; letter-spacing: .14em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { text-wrap: balance; }
h1 { margin: 0; font: 800 clamp(36px, 6vw, 68px)/.98 "DIN Alternate", "Avenir Next", "PingFang SC", sans-serif; letter-spacing: -.045em; }
h2 { margin: 0; font: 800 clamp(27px, 4vw, 40px)/1.06 "DIN Alternate", "Avenir Next", "PingFang SC", sans-serif; letter-spacing: -.035em; }
h3 { margin: 0 0 5px; font-size: 19px; line-height: 1.25; }
p { margin: 7px 0; }
.lede { max-width: 650px; margin: 10px 0 0; color: var(--muted); font-size: 17px; text-wrap: pretty; }

.deck-index { align-self: center; text-align: right; }
.deck-index strong { display: block; font: 800 48px/.85 "DIN Alternate", sans-serif; font-variant-numeric: tabular-nums; }
.deck-index span { font: 800 10px/1 "DIN Alternate", sans-serif; letter-spacing: .13em; }

.notice,
.device-dock,
.workspace,
.activity-log {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.notice { margin: 0 0 18px; padding: 16px 18px; }
.notice p { margin-bottom: 0; }
.notice-error { border-color: #e3aaa4; color: var(--danger); background: var(--danger-bg); }

.device-dock {
  position: sticky;
  z-index: 20;
  top: 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 20px;
  align-items: center;
  padding: 14px 16px;
  border-color: var(--device);
  color: #f7fff9;
  background: var(--device);
  box-shadow: 0 18px 45px rgb(13 40 33 / 22%);
}

.device-identity { display: flex; gap: 12px; align-items: center; min-width: 0; }
.device-identity h2 { margin: 0; font-size: 17px; letter-spacing: 0; }
.device-indicator { width: 11px; height: 11px; border: 2px solid #abc1b9; border-radius: 50%; background: transparent; box-shadow: 0 0 0 4px rgb(255 255 255 / 6%); }
.device-dock[data-state="connected"] .device-indicator { border-color: var(--signal); background: var(--signal); box-shadow: 0 0 0 4px rgb(217 255 99 / 15%); }
.device-dock[data-state="working"] .device-indicator { border-color: var(--orange); background: var(--orange); animation: status-pulse 1.1s ease-in-out infinite; }
.device-status { margin: 1px 0 0; color: #b9cbc4; font-size: 13px; }
.device-actions { display: flex; gap: 8px; }
.device-dock .inline-message { grid-column: 1 / -1; margin: 0; color: #ffd0ca; }
.device-dock .inline-message:empty { display: none; }

.button {
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 9px 15px;
  color: var(--ink);
  background: var(--paper-strong);
  font-weight: 750;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease, background-color 150ms ease, color 150ms ease;
}

.button:hover:not(:disabled) { border-color: var(--ink); transform: translateY(-1px); box-shadow: 0 7px 18px rgb(20 33 28 / 12%); }
.button:active:not(:disabled) { transform: translateY(1px); box-shadow: none; }
.button:disabled { cursor: not-allowed; opacity: .42; }
.button-primary { border-color: var(--device-deep); color: white; background: var(--device); }
.button-primary:hover:not(:disabled) { background: var(--device-deep); }
.button-signal { border-color: var(--signal); color: var(--device-deep); background: var(--signal); }
.button-signal:hover:not(:disabled) { border-color: var(--signal-deep); background: var(--signal-deep); }
.button-secondary { background: transparent; }
.button-quiet { border-color: rgb(255 255 255 / 35%); color: white; background: transparent; }
.button-danger { border-color: var(--danger); color: var(--danger); background: transparent; }
.button-large { min-height: 50px; padding-inline: 21px; }

.mode-switcher {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  width: min(720px, 100%);
  margin: 28px 0 12px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  background: #dfe4dd;
}

.mode-tab {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-height: 64px;
  border: 0;
  padding: 10px 13px;
  color: var(--muted);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.mode-tab:hover { color: var(--ink); background: rgb(255 255 255 / 45%); }
.mode-tab[aria-selected="true"] { color: white; background: var(--device); }
.mode-tab span:last-child { min-width: 0; }
.mode-tab strong, .mode-tab small { display: block; }
.mode-tab small { color: inherit; opacity: .72; }
.mode-number { font: 800 20px/1 "DIN Alternate", sans-serif; font-variant-numeric: tabular-nums; }

.workspace { padding: clamp(22px, 4vw, 42px); }
.section-heading { display: flex; gap: 20px; align-items: flex-end; justify-content: space-between; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.scope-chip, .selection-hint { width: fit-content; padding: 5px 9px; border: 1px solid var(--line-strong); background: #edf1eb; font-size: 12px; font-weight: 800; letter-spacing: .02em; }
.section-intro { max-width: 760px; margin: 18px 0 0; color: var(--muted); }
.system-layout { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(250px, .75fr); gap: 28px; margin-top: 28px; }
.workflow-stack { min-width: 0; }

.workflow-step { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 16px; padding: 28px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.workflow-step:first-of-type { padding-top: 28px; }
.step-index { display: grid; place-items: center; align-self: start; width: 42px; height: 42px; border: 1px solid var(--ink); background: var(--signal); font: 800 15px/1 "DIN Alternate", sans-serif; font-variant-numeric: tabular-nums; box-shadow: 4px 4px 0 var(--ink); }
.step-body { min-width: 0; }
.supporting { margin: 0 0 16px; color: var(--muted); }
.step-heading-row { display: flex; gap: 16px; align-items: start; justify-content: space-between; }

.field { display: grid; gap: 6px; min-width: 0; margin: 16px 0; color: var(--ink); font-weight: 700; }
.field > small { color: var(--muted); font-weight: 500; }
.field input,
.field select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--paper-strong);
  font-weight: 520;
  transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}

.field input:hover, .field select:hover { border-color: var(--ink); }
.field input:focus-visible, .field select:focus-visible { border-color: var(--device); box-shadow: 0 0 0 4px rgb(23 59 49 / 10%); }
.field input[readonly] { color: #3e554b; background: #e9eee9; }
input[type="file"] { padding: 7px; }
input[type="file"]::file-selector-button { min-height: 30px; margin-right: 10px; border: 0; border-radius: 5px; padding: 5px 10px; color: white; background: var(--device); font: inherit; font-weight: 750; cursor: pointer; }
.two-column { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.metadata-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(130px, .55fr) minmax(170px, .85fr); gap: 16px; }
.url-entry { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: end; }
.url-entry .field { margin-bottom: 0; }

.source-switcher { display: flex; gap: 6px; width: fit-content; margin: 14px 0; padding: 3px; border: 1px solid var(--line); background: #e9ede7; }
.source-switcher button { min-height: 38px; border: 0; padding: 7px 12px; color: var(--muted); background: transparent; font-weight: 750; cursor: pointer; }
.source-switcher button:hover { color: var(--ink); }
.source-switcher button[aria-selected="true"] { color: white; background: var(--device); }
.source-summary { width: fit-content; max-width: 100%; margin-top: 13px; padding: 7px 10px; color: var(--device-deep); background: var(--signal); font-size: 13px; font-weight: 800; }

.check-card { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 12px; align-items: start; margin: 16px 0; padding: 14px; border: 1px solid var(--line-strong); background: var(--paper-strong); cursor: pointer; }
.check-card:hover { border-color: var(--ink); }
.check-card input { width: 19px; height: 19px; margin: 2px 0 0; accent-color: var(--device); }
.check-card strong, .check-card small { display: block; }
.check-card small { margin-top: 3px; color: var(--muted); font-weight: 500; }
.check-card-warning { border-left: 5px solid var(--orange); background: var(--warning-bg); }
.check-card-danger { border-left: 5px solid var(--danger); background: var(--danger-bg); }

.primary-action-row { display: flex; gap: 16px; align-items: center; margin-top: 24px; }
.primary-action-row p { max-width: 370px; color: var(--muted); font-size: 13px; }
.action-row, .install-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 15px; }

.migration-map { align-self: start; padding: 22px; color: #eef8f2; background: var(--device); box-shadow: 10px 10px 0 var(--signal); }
.migration-map .eyebrow { color: var(--signal); }
.migration-map h3 { font-size: 24px; }
.migration-map ol { display: grid; gap: 7px; margin: 20px 0; padding: 0; list-style: none; }
.migration-map li { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid rgb(255 255 255 / 15%); }
.migration-map li span { color: #a9bfb7; font: 800 11px/1.5 "DIN Alternate", sans-serif; letter-spacing: .1em; }
.migration-map p:last-child { color: #bad0c7; font-size: 14px; }

.cover-workbench { display: grid; grid-template-columns: 156px minmax(0, 1fr); gap: 22px; align-items: center; margin-top: 14px; padding: 18px; border: 1px solid var(--line); background: #eef1eb; }
.cover-frame, .completion-art { position: relative; overflow: hidden; aspect-ratio: 3 / 4; border: 1px solid var(--device-deep); background: var(--device-deep); box-shadow: 7px 7px 0 var(--orange); }
.cover-frame { width: 156px; }
.cover-frame img, .completion-art img { display: block; width: 100%; height: 100%; object-fit: cover; }
.cover-placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; padding: 12px; color: var(--signal); background: linear-gradient(145deg, #173b31, #0d2821); }
.cover-placeholder span { font: 800 10px/1 "DIN Alternate", sans-serif; letter-spacing: .12em; }
.cover-placeholder strong { font: 800 25px/.9 "DIN Alternate", sans-serif; letter-spacing: -.03em; }
.cover-details { min-width: 0; }
.cover-details > p:first-child { color: var(--muted); }
.technical-line { max-width: 100%; color: var(--muted); font: 12px/1.55 ui-monospace, "SFMono-Regular", monospace; overflow-wrap: anywhere; }
.privacy-note { padding: 10px 12px; border-left: 3px solid var(--success); color: #3d5a4f; background: #e1ebe4; font-size: 13px; }

.slot-deck { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 18px 0; }
.slot-card { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 13px; align-items: center; min-height: 112px; border: 1px solid var(--line-strong); padding: 12px; color: var(--ink); background: var(--paper-strong); text-align: left; cursor: pointer; transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease; }
.slot-card:hover:not(:disabled) { border-color: var(--ink); transform: translateY(-2px); box-shadow: 0 12px 24px rgb(20 33 28 / 10%); }
.slot-card[aria-checked="true"] { border: 2px solid var(--device); padding: 11px; background: #eff5ee; box-shadow: 6px 6px 0 var(--signal); }
.slot-card:disabled { color: var(--muted); cursor: not-allowed; opacity: .72; }
.slot-art { position: relative; display: flex; flex-direction: column; justify-content: space-between; width: 64px; aspect-ratio: 3 / 4; overflow: hidden; padding: 7px; border: 1px solid var(--device-deep); color: var(--signal); background: linear-gradient(145deg, var(--device), var(--device-deep)); box-shadow: 3px 3px 0 var(--orange); }
.slot-card.is-empty .slot-art, .slot-card.is-ghost .slot-art { border-style: dashed; color: var(--muted); background: #e4e9e3; box-shadow: 3px 3px 0 #c4cbc5; }
.slot-cover { position: absolute; inset: 0; width: 100%; height: 100%; }
.slot-art strong, .slot-art span { position: relative; z-index: 1; width: fit-content; }
.slot-art strong { font: 800 21px/1 "DIN Alternate", sans-serif; font-variant-numeric: tabular-nums; }
.slot-art span { font: 800 8px/1 "DIN Alternate", sans-serif; letter-spacing: .08em; }
.slot-art.has-cover strong, .slot-art.has-cover span { padding: 3px 4px; color: white; background: rgb(13 40 33 / 82%); text-shadow: 0 1px 1px rgb(0 0 0 / 50%); }
.slot-art.has-cover strong { font-size: 12px; }
.slot-copy { min-width: 0; }
.slot-copy strong, .slot-copy small { display: block; }
.slot-copy strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slot-copy small { margin-top: 3px; color: var(--muted); }

.danger-zone { margin-top: 22px; border-top: 1px solid var(--line); }
.danger-zone summary { width: fit-content; margin-top: 16px; color: var(--danger); font-weight: 750; cursor: pointer; }
.danger-zone-body { max-width: 650px; margin-top: 12px; padding: 16px; border: 1px solid #e3b0aa; background: var(--danger-bg); }
.danger-zone-body > p { color: #744640; }

.inline-message { min-height: 1.5em; margin-top: 12px; font-weight: 720; }
.inline-message.ok { color: var(--success); }
.inline-message.error { color: var(--danger); }

.completion { display: grid; grid-template-columns: 108px minmax(0, 1fr); gap: 22px; align-items: center; margin-top: 28px; padding: 20px; border: 2px solid var(--device); color: white; background: var(--device); box-shadow: 9px 9px 0 var(--signal); }
.completion-art { width: 108px; box-shadow: 5px 5px 0 var(--orange); }
.completion-copy h3 { font-size: 28px; }
.completion-copy p { color: #c6d8d1; }
.success-kicker { color: var(--signal); font: 800 11px/1 "DIN Alternate", sans-serif; letter-spacing: .14em; }
.completion .button-secondary { border-color: #aec1ba; color: white; }
.device-note { margin-top: 28px; padding-left: 14px; border-left: 3px solid var(--orange); color: var(--muted); font-size: 13px; }

.activity-log { margin-top: 16px; padding: 0 18px; }
.activity-log summary { display: flex; justify-content: space-between; padding: 15px 0; font-weight: 800; cursor: pointer; }
.log-state { color: var(--muted); font: 800 10px/1.8 "DIN Alternate", sans-serif; letter-spacing: .13em; }
pre { min-height: 120px; max-height: 320px; margin: 0 0 18px; overflow: auto; padding: 14px; color: #d9e7de; background: #101713; white-space: pre-wrap; word-break: break-word; font: 12px/1.55 ui-monospace, "SFMono-Regular", monospace; overscroll-behavior: contain; }

[hidden] { display: none !important; }

@keyframes status-pulse {
  50% { opacity: .4; transform: scale(.82); }
}

@media (max-width: 820px) {
  .system-layout { grid-template-columns: 1fr; }
  .migration-map { width: calc(100% - 10px); }
  .slot-deck { grid-template-columns: 1fr; }
  .slot-card { grid-template-columns: 54px minmax(0, 1fr); min-height: 94px; }
  .slot-art { width: 54px; }
}

@media (max-width: 620px) {
  .app-shell { width: min(100% - 24px, 1120px); padding-top: 22px; }
  .masthead { grid-template-columns: 58px minmax(0, 1fr); gap: 16px; align-items: start; }
  .brand-mark { width: 54px; height: 54px; box-shadow: 4px 4px 0 var(--ink); font-size: 14px; }
  .brand-mark span:last-child { font-size: 8px; }
  .deck-index { display: none; }
  h1 { font-size: 39px; }
  .lede { font-size: 15px; }
  .device-dock { position: relative; top: auto; grid-template-columns: 1fr; }
  .device-actions { width: 100%; }
  .device-actions .button { flex: 1; }
  .mode-tab { grid-template-columns: 1fr; gap: 3px; min-height: 74px; }
  .mode-number { font-size: 13px; }
  .mode-tab small { display: none; }
  .workspace { padding: 20px 16px; }
  .section-heading { align-items: start; flex-direction: column; gap: 12px; }
  .workflow-step { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; }
  .step-index { width: 32px; height: 32px; box-shadow: 3px 3px 0 var(--ink); font-size: 12px; }
  .two-column, .metadata-grid, .url-entry { grid-template-columns: 1fr; }
  .url-entry .button { width: 100%; }
  .cover-workbench { grid-template-columns: 104px minmax(0, 1fr); gap: 15px; padding: 14px; }
  .cover-frame { width: 104px; box-shadow: 5px 5px 0 var(--orange); }
  .cover-placeholder { padding: 8px; }
  .cover-placeholder strong { font-size: 19px; }
  .step-heading-row { align-items: start; flex-direction: column; gap: 8px; }
  .primary-action-row { align-items: stretch; flex-direction: column; }
  .primary-action-row .button { width: 100%; }
  .install-actions { align-items: stretch; flex-direction: column; }
  .install-actions .button { width: 100%; }
  .completion { grid-template-columns: 82px minmax(0, 1fr); gap: 15px; padding: 15px; box-shadow: 6px 6px 0 var(--signal); }
  .completion-art { width: 82px; }
  .completion-copy h3 { font-size: 22px; }
}

@media (max-width: 420px) {
  .cover-workbench { grid-template-columns: 1fr; }
  .cover-frame { width: 120px; }
}

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