/* Protocol Explorer — brand theme layer.
   Loaded after the app stylesheet so these tokens win on equal specificity. */

:root {
  --bg: #f2f5fc;
  --panel: #ffffff;
  --ink: #0e1c3d;
  --ink-strong: #06102b;
  --ink-soft: #3d5384;
  --ink-muted: #6d80a4;
  --line: rgba(16, 46, 104, 0.22);
  --line-soft: rgba(16, 46, 104, 0.12);
  --line-mid: rgba(16, 46, 104, 0.32);
  --blue: #1d4ed8;
  --active: #16389f;
  --green: #0f7a55;
  --amber: #a35a00;
  --grey: #6d80a4;
  --pe-accent: #1d4ed8;
  --pe-accent-soft: rgba(29, 78, 216, 0.1);
}

:root[data-theme="dark"] {
  --bg: #060a16;
  --panel: #0a1224;
  --ink: #dfe8ff;
  --ink-strong: #f4f8ff;
  --ink-soft: #a6b8d8;
  --ink-muted: #7889a9;
  --line: rgba(110, 150, 220, 0.26);
  --line-soft: rgba(110, 150, 220, 0.14);
  --line-mid: rgba(110, 150, 220, 0.4);
  --blue: #4d8dff;
  --active: #7aaeff;
  --green: #23d39c;
  --amber: #ffc24a;
  --grey: #8b9dbc;
  --pe-accent: #4d8dff;
  --pe-accent-soft: rgba(77, 141, 255, 0.14);
}

body {
  background-color: var(--bg);
}

:root[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 12% -10%, rgba(56, 112, 224, 0.16), transparent 46%),
    radial-gradient(circle at 88% 0%, rgba(24, 78, 168, 0.14), transparent 42%);
  background-repeat: no-repeat;
}

/* ── product nav injected by gate.js ─────────────────────────────── */
.pe-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 52px;
  padding: 0 16px;
  font: 500 12px/1 Iosevka, ui-monospace, monospace;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.pe-nav a {
  color: var(--ink-soft);
  text-decoration: none;
}

.pe-nav a:hover {
  color: var(--ink);
}

.pe-nav .pe-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-strong);
  text-decoration: none;
}

.pe-nav .pe-brand img {
  width: 22px;
  height: 22px;
  border-radius: 6px;
}

.pe-nav .pe-spacer {
  flex: 1;
}

.pe-nav .pe-link {
  padding: 7px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
}

.pe-nav .pe-link:hover {
  border-color: var(--line);
  color: var(--ink);
}

.pe-btn {
  appearance: none;
  cursor: pointer;
  font: 500 12px/1 Iosevka, ui-monospace, monospace;
  letter-spacing: 0.04em;
  padding: 9px 14px;
  border-radius: 6px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--panel);
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.pe-btn:hover {
  border-color: var(--blue);
}

.pe-btn.pe-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #ffffff;
}

.pe-btn.pe-primary:hover {
  filter: brightness(1.08);
}

.pe-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: 4px;
  font: 500 10px/1 Iosevka, ui-monospace, monospace;
  letter-spacing: 0.1em;
  color: var(--pe-accent);
  background: var(--pe-accent-soft);
  border: 1px solid color-mix(in srgb, var(--pe-accent) 34%, transparent);
}

/* shrink the app shell so the fixed nav does not cover the lesson footer */
body.pe-has-nav #pe-app-wrap {
  height: calc(100dvh - 52px);
  margin-top: 52px;
}

/* ── locked protocol rows ────────────────────────────────────────── */
.topbar-tools a.credit {
  display: none !important;
}

.proto-row {
  position: relative;
}

.proto-row.pe-locked {
  opacity: 0.72;
}

.proto-row.pe-locked:hover {
  opacity: 1;
}

.pe-pro-tag {
  position: absolute;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  padding: 2px 6px;
  border-radius: 3px;
  font: 600 9px/1.4 Iosevka, ui-monospace, monospace;
  letter-spacing: 0.12em;
  color: #ffffff;
  background: var(--blue);
  pointer-events: none;
}

.pe-step-lock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  cursor: pointer;
  padding: 10px 12px;
  margin-top: 6px;
  border-radius: 6px;
  border: 1px dashed var(--line-mid);
  color: var(--ink-soft);
  background: var(--pe-accent-soft);
  font: 400 11px/1.5 Iosevka, ui-monospace, monospace;
  text-align: left;
}

.pe-step-lock strong {
  color: var(--pe-accent);
  font-weight: 600;
}

/* ── paywall dialog ──────────────────────────────────────────────── */
.pe-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(3, 8, 20, 0.62);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.pe-modal[hidden] {
  display: none;
}

.pe-modal-card {
  width: min(460px, 100%);
  max-height: calc(100vh - 40px);
  overflow: auto;
  padding: 26px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 24px 60px rgba(2, 6, 18, 0.4);
}

.pe-modal-card h2 {
  margin: 10px 0 8px;
  font: 500 20px/1.3 Iosevka, ui-monospace, monospace;
  color: var(--ink-strong);
}

.pe-modal-card p {
  margin: 0 0 14px;
  font: 400 12px/1.7 Iosevka, ui-monospace, monospace;
  color: var(--ink-soft);
}

.pe-modal-card ul {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font: 400 12px/1.9 Iosevka, ui-monospace, monospace;
  color: var(--ink-soft);
}

.pe-modal-card li::before {
  content: "▸ ";
  color: var(--pe-accent);
}

.pe-price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 16px;
  color: var(--ink-strong);
}

.pe-price b {
  font: 500 30px/1 Iosevka, ui-monospace, monospace;
}

.pe-price span {
  font: 400 11px/1 Iosevka, ui-monospace, monospace;
  color: var(--ink-muted);
}

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

.pe-actions .pe-btn {
  flex: 1 1 140px;
  text-align: center;
}

.pe-error {
  margin: 10px 0 0;
  font: 400 11px/1.6 Iosevka, ui-monospace, monospace;
  color: #e5484d;
}

.pe-close {
  float: right;
  appearance: none;
  cursor: pointer;
  border: 0;
  background: transparent;
  color: var(--ink-muted);
  font: 400 18px/1 Iosevka, ui-monospace, monospace;
}

/* ── marketing / SEO block under the app ─────────────────────────── */
html.pe-scroll,
html.pe-scroll body {
  height: auto;
  min-height: 100%;
  overflow: visible;
}

#pe-app-wrap {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.pe-marketing {
  border-top: 1px solid var(--line-soft);
  background: var(--bg);
  padding: 56px 20px 40px;
  color: var(--ink-soft);
}

.pe-marketing .pe-inner {
  max-width: 940px;
  margin: 0 auto;
  font: 400 13px/1.85 Iosevka, ui-monospace, monospace;
}

.pe-marketing h1 {
  margin: 0 0 12px;
  font: 500 26px/1.35 Iosevka, ui-monospace, monospace;
  color: var(--ink-strong);
  letter-spacing: -0.01em;
}

.pe-marketing h2 {
  margin: 34px 0 10px;
  font: 500 15px/1.4 Iosevka, ui-monospace, monospace;
  color: var(--ink-strong);
  letter-spacing: 0.02em;
}

.pe-marketing p {
  margin: 0 0 12px;
  max-width: 74ch;
}

.pe-marketing strong {
  color: var(--ink);
  font-weight: 500;
}

.pe-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin: 18px 0 8px;
}

.pe-col {
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--panel);
}

.pe-col h3 {
  margin: 0 0 6px;
  font: 500 12px/1.4 Iosevka, ui-monospace, monospace;
  color: var(--ink-strong);
  letter-spacing: 0.04em;
}

.pe-col p {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
}

.pe-faq {
  margin: 12px 0 0;
}

.pe-faq dt {
  margin: 16px 0 4px;
  font: 500 12px/1.5 Iosevka, ui-monospace, monospace;
  color: var(--ink);
}

.pe-faq dd {
  margin: 0;
  font-size: 12px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.pe-foot {
  max-width: 940px;
  margin: 32px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font: 400 11px/1.6 Iosevka, ui-monospace, monospace;
  color: var(--ink-muted);
}

.pe-foot a {
  color: var(--ink-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.pe-foot a:hover {
  color: var(--ink);
}

@media (max-width: 720px) {
  .pe-nav {
    height: 48px;
    padding: 0 10px;
    gap: 6px;
  }

  body.pe-has-nav #pe-app-wrap {
    height: calc(100dvh - 48px);
    margin-top: 48px;
  }

  .pe-nav .pe-link {
    display: none;
  }

  .pe-marketing {
    padding: 36px 16px 28px;
  }

  .pe-marketing h1 {
    font-size: 21px;
  }
}