*,
*::before,
*::after { box-sizing: border-box; }

:root {
  --paper: #f5f3ee;
  --ink: #141414;
  --muted: #62605b;
  --line: #d8d4ca;
  --panel: #fffdf8;
  --panel-strong: #e9e4d8;
  --green: #b7f247;
  --coral: #ff765c;
  --teal: #38b8ad;
  --black: #111111;
  --radius: 8px;
  --shadow: 0 18px 50px rgba(20, 20, 20, 0.08);
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(20,20,20,0.035) 1px, transparent 1px),
    linear-gradient(180deg, #f8f6f0 0%, var(--paper) 100%);
  background-size: 32px 32px, auto;
}

a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }

.app-shell {
  width: min(1280px, calc(100% - 28px));
  margin: 0 auto;
  padding: 18px 0 28px;
}

.topbar,
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.topbar {
  min-height: 58px;
  border-bottom: 2px solid var(--black);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: var(--black);
  color: var(--green);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}

.brand strong,
.brand small {
  display: block;
}

.brand small,
.topnav,
.site-footer {
  color: var(--muted);
}

.topnav,
.site-footer nav {
  display: flex;
  gap: 18px;
}

.workspace {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) 290px;
  gap: 14px;
  padding: 18px 0;
  min-height: calc(100vh - 128px);
}

.tool-rail,
.tool-stage,
.side-board {
  min-width: 0;
}

.tool-rail {
  display: grid;
  align-content: start;
  gap: 8px;
}

.rail-heading,
.tool-tab,
.tool-panel,
.status-card,
.ad-slot {
  border: 2px solid var(--black);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 var(--black);
}

.rail-heading {
  padding: 14px;
  background: var(--green);
}

.rail-heading span,
.eyebrow,
.panel-number,
.ad-badge {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.rail-heading strong {
  display: block;
  margin-top: 6px;
}

.tool-tab {
  width: 100%;
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 8px;
  padding: 12px;
  text-align: left;
  background: var(--panel);
}

.tool-tab span {
  font-family: "IBM Plex Mono", monospace;
  color: var(--muted);
}

.tool-tab.is-active {
  background: var(--black);
  color: white;
}

.tool-tab.is-active span {
  color: var(--green);
}

.tool-stage {
  display: grid;
  gap: 14px;
}

.stage-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 360px);
  gap: 18px;
  align-items: end;
  padding: 6px 2px 2px;
}

.stage-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

h1, h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 3.2rem;
  line-height: 0.95;
}

h2 {
  font-size: 1.75rem;
}

.tool-panel {
  display: none;
  padding: 22px;
  background: var(--panel);
}

.tool-panel.is-active {
  display: grid;
  gap: 14px;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 14px;
}

label {
  font-weight: 700;
}

input[type="text"],
textarea,
select {
  width: 100%;
  border: 2px solid var(--black);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 13px 14px;
}

textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.55;
}

.range-row {
  display: grid;
  gap: 8px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--coral);
}

.toggle-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.toggle-grid label {
  border: 2px solid var(--black);
  border-radius: var(--radius);
  background: var(--panel-strong);
  padding: 10px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.primary-button,
.secondary-button,
.ghost-button {
  border: 2px solid var(--black);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-weight: 700;
}

.primary-button {
  background: var(--green);
  color: var(--black);
}

.secondary-button {
  background: var(--panel-strong);
  color: var(--black);
}

.ghost-button {
  background: #fff;
  color: var(--black);
}

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

.stat-strip {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.result-grid div,
.stat-strip div {
  min-width: 0;
  border: 2px solid var(--black);
  border-radius: var(--radius);
  background: var(--panel-strong);
  padding: 14px;
}

.result-grid span,
.stat-strip span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.result-grid strong,
.stat-strip strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
}

.side-board {
  display: grid;
  align-content: start;
  gap: 14px;
}

.status-card,
.ad-slot {
  padding: 18px;
  background: var(--panel);
}

.status-card h2 {
  margin-top: 8px;
}

.status-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.ad-slot {
  min-height: 96px;
}

.ad-slot-sidebar {
  min-height: 230px;
}

.ad-slot-inline {
  min-height: 118px;
}

.ad-slot.is-hidden,
.side-board.ads-empty .ad-slot {
  display: none;
}

.ad-link {
  display: grid;
  gap: 10px;
}

.ad-link-image {
  overflow: hidden;
  border-radius: var(--radius);
  border: 2px solid var(--black);
}

.ad-link-image img {
  display: block;
  width: 100%;
  height: auto;
}

.ad-copy {
  display: grid;
  gap: 4px;
}

.ad-copy span {
  color: var(--muted);
  line-height: 1.5;
}

.site-footer {
  padding-top: 16px;
  border-top: 2px solid var(--black);
}

.subpage {
  max-width: 920px;
  margin: 20px auto 0;
  display: grid;
  gap: 14px;
}

.subpage-hero,
.content-panel {
  border: 2px solid var(--black);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 6px 6px 0 var(--black);
  padding: 24px;
}

.content-panel p,
.content-panel li,
.subpage-hero p {
  color: var(--muted);
  line-height: 1.65;
}

.content-panel ul {
  margin: 0;
  padding-left: 18px;
}

@media (max-width: 1080px) {
  .workspace {
    grid-template-columns: 160px minmax(0, 1fr);
  }

  .side-board {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .app-shell {
    width: min(100% - 18px, 1280px);
  }

  .topbar,
  .site-footer,
  .topnav,
  .site-footer nav,
  .stage-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .workspace,
  .side-board,
  .toggle-grid,
  .result-grid,
  .stat-strip {
    grid-template-columns: 1fr;
  }

  .tool-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .rail-heading {
    grid-column: 1 / -1;
  }

  h1 {
    font-size: 2.35rem;
  }

  .tool-panel {
    padding: 16px;
  }
}