:root {
  color-scheme: dark;
  --bg: #0f1115;
  --panel: #181b22;
  --panel-2: #20242d;
  --text: #f3f5f7;
  --muted: #aab2c0;
  --line: #303744;
  --accent: #4cc9a6;
  --accent-2: #6da8ff;
  --danger: #ff6b6b;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0 24px;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0;
}

h1, h2, h3, p { margin: 0; }
h1 { font-size: 34px; line-height: 1.15; letter-spacing: 0; }
h2 { font-size: 20px; letter-spacing: 0; }
h3 { font-size: 16px; letter-spacing: 0; }
p { color: var(--muted); line-height: 1.5; }

.status {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--muted);
  min-width: 112px;
  text-align: center;
}
.status.ok { border-color: rgba(76, 201, 166, .45); color: var(--accent); }
.status.bad { border-color: rgba(255, 107, 107, .45); color: var(--danger); }

.profile {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
  margin-bottom: 20px;
}
.profile > div {
  background: var(--panel);
  padding: 18px;
}
.label {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr;
  gap: 16px;
  align-items: stretch;
}
.protocol-list {
  display: grid;
  gap: 16px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel);
}
.panel.primary {
  background: var(--panel-2);
  border-color: rgba(76, 201, 166, .42);
}
.protocol {
  display: grid;
  gap: 16px;
}
.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}
.panel-head h2 {
  margin-top: 4px;
}
.protocol-number {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}
.protocol-tag {
  border: 1px solid rgba(76, 201, 166, .4);
  border-radius: 999px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  padding: 7px 10px;
  white-space: nowrap;
}
.protocol-tag.ok {
  border-color: rgba(76, 201, 166, .42);
  color: var(--accent);
}
.protocol-tag.bad {
  border-color: rgba(255, 107, 107, .42);
  color: var(--danger);
}
.protocol.unavailable {
  opacity: .72;
}
.protocol-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 244px;
  gap: 18px;
  align-items: start;
}

pre {
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 76px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101318;
  padding: 14px;
  margin: 16px 0;
  color: #dce5ef;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.actions.vertical { flex-direction: column; }

.button, .copy {
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--accent);
  color: #07100d;
  font-weight: 700;
  text-decoration: none;
  padding: 10px 14px;
  cursor: pointer;
  text-align: center;
}
.button.ghost, .copy {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}
.button.disabled, .copy.disabled, .button[aria-disabled="true"] {
  opacity: .5;
  cursor: not-allowed;
  pointer-events: none;
}

.qr-image {
  display: block;
  width: 244px;
  height: 244px;
  object-fit: contain;
  background: white;
  border-radius: 8px;
  padding: 8px;
}
.client-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.client-grid > div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101318;
  padding: 12px;
  min-height: 74px;
}
.client-grid strong {
  display: block;
  margin-bottom: 5px;
}
.client-grid span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.35;
}
.app-links > div {
  display: grid;
  gap: 8px;
  align-content: start;
}
.app-links a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.25;
  background: rgba(255, 255, 255, .025);
}
.app-links a:hover {
  border-color: rgba(76, 201, 166, .5);
  color: var(--accent);
}
.muted-card {
  opacity: .68;
}

.demo-shell {
  max-width: 720px;
}
.demo-panel {
  display: grid;
  gap: 18px;
}
.demo-form {
  display: grid;
  gap: 14px;
}
.demo-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}
.demo-form input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101318;
  color: var(--text);
  padding: 13px 14px;
  font: inherit;
}
.demo-form input:focus {
  outline: 2px solid rgba(76, 201, 166, .4);
  border-color: var(--accent);
}
.demo-form .hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.button:disabled {
  opacity: .55;
  cursor: wait;
}
.result {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.instructions {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 14px;
}
.steps > div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

@media (max-width: 860px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  h1 { font-size: 28px; }
  .profile, .grid, .steps, .client-grid, .protocol-body { grid-template-columns: 1fr; }
  .panel-head { flex-direction: column; }
  .qr-image {
    width: min(244px, 100%);
    height: auto;
    aspect-ratio: 1;
  }
}