/* Stratlate — shared stylesheet */

:root {
  --ink: #0a0d13;
  --ink-2: #0e131c;
  --ink-3: #121826;
  --panel: #0d1119;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e8ecf4;
  --text-dim: #9aa3b5;
  --text-faint: #6b7488;
  --signal: #c9f158;
  --pine: #5fb96e;
  --amber: #e8b95a;
  --red: #ef6a6a;
  --hazard: #b48ef0;
  --blue: #6ab0f3;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --heading: "Chakra Petch", system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  --radius: 10px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--heading);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.5em;
  letter-spacing: 0.01em;
}

a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 13, 19, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--heading);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}
.brand:hover { text-decoration: none; }
.brand svg { display: block; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.9rem;
}
.site-nav a { color: var(--text-dim); }
.site-nav a:hover { color: var(--text); text-decoration: none; }
.site-nav a.nav-cta {
  color: var(--signal);
  border: 1px solid rgba(201, 241, 88, 0.35);
  padding: 6px 14px;
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}
.site-nav a.nav-cta:hover {
  background: var(--signal);
  color: var(--ink);
}

/* Sign in / signed-in control. Sits in the header nav and inherits its size,
   so it reads as one more nav item rather than a form control. */
.auth-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  white-space: nowrap;
}
.auth-signedin {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.auth-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.auth-signedin strong {
  color: var(--text);
  font-weight: 600;
  max-width: 18ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.auth-btn {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: var(--signal);
  cursor: pointer;
}
.auth-btn:hover { text-decoration: underline; }
.auth-btn-quiet { color: var(--text-dim); }
.auth-btn-quiet:hover { color: var(--text); }

/* ---------- Banner ---------- */

.app-banner {
  background: rgba(232, 185, 90, 0.1);
  border-bottom: 1px solid rgba(232, 185, 90, 0.28);
  color: var(--amber);
  font-size: 0.85rem;
  text-align: center;
  padding: 8px 24px;
}
/* The hidden attribute must win over any element's own display value (the
   spinners are display:inline-block, which otherwise beats the browser's
   default [hidden] rule and leaves them spinning forever). */
[hidden] { display: none !important; }

.app-banner[hidden] { display: none; }

/* ---------- Hero ---------- */

.hero {
  padding: 88px 0 64px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 45% at 50% -10%, rgba(201, 241, 88, 0.08), transparent),
    radial-gradient(ellipse 45% 35% at 80% 0%, rgba(95, 185, 110, 0.06), transparent);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  margin: 0 auto 18px;
  max-width: 820px;
}
.hero h1 .accent { color: var(--signal); }

.hero p.lede {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
  font-size: 0.8rem;
  color: var(--text-faint);
}
.hero-badges span {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.02);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  padding: 12px 26px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: filter 0.15s ease, transform 0.1s ease, opacity 0.15s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--signal);
  color: #10130a;
}
.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  filter: none;
  transform: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.3); }

.btn-small {
  font-size: 0.8rem;
  padding: 6px 14px;
  border-radius: 8px;
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(16, 19, 10, 0.35);
  border-top-color: #10130a;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Converter ---------- */

.converter-section { padding: 8px 0 72px; }

.converter-shell {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--ink-2), var(--panel));
  padding: 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.converter-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 18px;
}

.direction-group {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.field label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin-bottom: 6px;
}

select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--ink-3) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239aa3b5' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 12px center;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 9px 34px 9px 12px;
  cursor: pointer;
}
select:hover { border-color: rgba(255, 255, 255, 0.25); }

.direction-arrow {
  color: var(--pine);
  font-size: 1.2rem;
  padding-bottom: 8px;
  user-select: none;
}

.toolbar-spacer { flex: 1; }

.converter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--ink);
  overflow: hidden;
}

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  min-height: 40px;
}
.pane-head .dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: 1px;
}
.dot-src { background: var(--signal); }
.dot-out { background: var(--pine); }

.pane-actions { display: flex; gap: 8px; }
.pane-actions button {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  font-family: var(--body);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.pane-actions button:hover { color: var(--text); border-color: rgba(255,255,255,0.3); }
.pane-actions button.copied { color: var(--signal); border-color: rgba(201,241,88,0.5); }

.pane textarea {
  width: 100%;
  min-height: 380px;
  resize: vertical;
  background: var(--ink);
  color: var(--text);
  border: 0;
  padding: 14px;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.55;
  tab-size: 3;
}
.pane textarea:focus-visible { outline-offset: -2px; }
.pane textarea::placeholder { color: var(--text-faint); }

/* CodeMirror theming (applies only when CDN loads) */
.pane .CodeMirror {
  height: 380px;
  background: var(--ink);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.55;
}
.pane .CodeMirror-gutters {
  background: var(--ink);
  border-right: 1px solid var(--border);
}
.pane .CodeMirror-linenumber { color: var(--text-faint); }
.pane .CodeMirror-cursor { border-left: 2px solid var(--signal); }
.pane .CodeMirror-selected { background: rgba(201, 241, 88, 0.12); }
.pane .CodeMirror-focused .CodeMirror-selected { background: rgba(201, 241, 88, 0.16); }
.pane .CodeMirror span.cm-keyword { color: #8fd0ff; }
.pane .CodeMirror span.cm-number { color: var(--signal); }
.pane .CodeMirror span.cm-string { color: var(--pine); }
.pane .CodeMirror span.cm-comment { color: var(--text-faint); font-style: italic; }
.pane .CodeMirror span.cm-def,
.pane .CodeMirror span.cm-variable-2 { color: #d8b4fe; }
.pane .CodeMirror span.cm-builtin,
.pane .CodeMirror span.cm-atom { color: var(--amber); }

/* ---------- Diagnostics panel ---------- */

.diagnostics {
  margin-top: 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--ink);
  overflow: hidden;
}
.diagnostics-head {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
}
.diagnostics ul {
  list-style: none;
  margin: 0;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 0.82rem;
  max-height: 220px;
  overflow-y: auto;
}
.diagnostics li { padding: 3px 0; overflow-wrap: anywhere; }
.diagnostics li .loc {
  display: inline-block;
  min-width: 70px;
  color: var(--text-faint);
}
.diagnostics li.warn, .lint-section li.warn, .preflight-details li.warn { color: var(--amber); }
.diagnostics li.err, .lint-section li.err, .preflight-details li.err { color: var(--red); }
.diagnostics li.info, .lint-section li.info, .preflight-details li.info { color: var(--text-dim); }
.diagnostics li.ok, .lint-section li.ok, .preflight-details li.ok { color: var(--pine); }
.diagnostics li.hazard, .lint-section li.hazard, .preflight-details li.hazard { color: var(--hazard); }

.sev-badge {
  display: inline-block;
  font-family: var(--body);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 4px;
  border: 1px solid;
  padding: 1px 6px;
  margin-right: 8px;
  vertical-align: 1px;
}
.sev-badge.sev-error, .sev-badge.sev-fatal {
  color: var(--red);
  border-color: rgba(239, 106, 106, 0.4);
  background: rgba(239, 106, 106, 0.1);
}
.sev-badge.sev-warn, .sev-badge.sev-warning {
  color: var(--amber);
  border-color: rgba(232, 185, 90, 0.4);
  background: rgba(232, 185, 90, 0.1);
}
.sev-badge.sev-hazard {
  color: var(--hazard);
  border-color: rgba(180, 142, 240, 0.4);
  background: rgba(180, 142, 240, 0.1);
}
.sev-badge.sev-info, .sev-badge.sev-hint {
  color: var(--text-dim);
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
}
.diag-code {
  color: var(--text-faint);
  margin-right: 8px;
}

/* ---------- Pre-flight check strip ---------- */

.preflight {
  margin-top: 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--ink);
  padding: 10px 14px;
}
.preflight[hidden] { display: none; }
.preflight-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.preflight-title {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
}
.verdict-chip {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  border-radius: 999px;
  border: 1px solid;
  padding: 2px 10px;
  white-space: nowrap;
}
.verdict-chip.verdict-feasible {
  color: var(--pine);
  border-color: rgba(95, 185, 110, 0.4);
  background: rgba(95, 185, 110, 0.08);
}
.verdict-chip.verdict-pipeline {
  color: var(--blue);
  border-color: rgba(106, 176, 243, 0.4);
  background: rgba(106, 176, 243, 0.08);
}
.verdict-chip.verdict-degraded {
  color: var(--amber);
  border-color: rgba(232, 185, 90, 0.4);
  background: rgba(232, 185, 90, 0.08);
}
.verdict-chip.verdict-blocked {
  color: var(--red);
  border-color: rgba(239, 106, 106, 0.4);
  background: rgba(239, 106, 106, 0.08);
}
.preflight-message {
  margin: 8px 0 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.preflight-message[hidden] { display: none; }
.preflight-details { margin-top: 8px; }
.preflight-details[hidden] { display: none; }
.preflight-details summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  list-style: none;
}
.preflight-details summary::-webkit-details-marker { display: none; }
.preflight-details summary::before {
  content: "\25B8";
  margin-right: 6px;
  color: var(--text-faint);
}
.preflight-details[open] summary::before { content: "\25BE"; }
.preflight-details ul {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  max-height: 220px;
  overflow-y: auto;
}
.preflight-details li { padding: 3px 0; overflow-wrap: anywhere; }
.preflight-details li .loc {
  display: inline-block;
  min-width: 70px;
  margin-right: 4px;
  color: var(--text-faint);
}

/* ---------- Lint section (TradingView compatibility check) ---------- */

.lint-section {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--ink);
  overflow: hidden;
}
.lint-section[hidden] { display: none; }
.lint-section summary {
  cursor: pointer;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  list-style: none;
}
.lint-section summary::-webkit-details-marker { display: none; }
.lint-section summary::before {
  content: "\25B8";
  color: var(--pine);
  margin-right: 8px;
}
.lint-section[open] summary::before { content: "\25BE"; }
.lint-section[open] summary { border-bottom: 1px solid var(--border); }
.lint-section ul {
  list-style: none;
  margin: 0;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 0.82rem;
  max-height: 220px;
  overflow-y: auto;
}
.lint-section li { padding: 3px 0; overflow-wrap: anywhere; }
.lint-section li .loc {
  display: inline-block;
  min-width: 70px;
  color: var(--text-faint);
}

/* ---------- Fidelity chip ---------- */

.fidelity-chip {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--pine);
  border: 1px solid rgba(95, 185, 110, 0.35);
  background: rgba(95, 185, 110, 0.08);
  border-radius: 999px;
  padding: 2px 9px;
  margin-left: 10px;
  cursor: help;
  white-space: nowrap;
}
.fidelity-chip[hidden] { display: none; }

/* ---------- Extras notice ---------- */

.extras-notice {
  border-top: 1px solid var(--border);
  background: rgba(201, 241, 88, 0.04);
  padding: 10px 14px;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.extras-notice[hidden] { display: none; }
.extras-notice p { margin: 0 0 8px; }
.extras-notice code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--text);
}
.extras-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.extras-buttons button {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.extras-buttons button:hover { color: var(--text); border-color: rgba(255,255,255,0.3); }
.extras-buttons button.copied { color: var(--signal); border-color: rgba(201,241,88,0.5); }

.spinner-ghost {
  border-color: rgba(255, 255, 255, 0.25);
  border-top-color: var(--text);
}

/* ---------- Features ---------- */

.features { padding: 40px 0 24px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--ink-2);
  padding: 24px;
}
.feature-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.feature-card p { color: var(--text-dim); font-size: 0.92rem; margin: 0; }
.feature-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 9px;
  background: rgba(201, 241, 88, 0.1);
  border: 1px solid rgba(201, 241, 88, 0.25);
  color: var(--signal);
  margin-bottom: 14px;
}

/* ---------- FAQ ---------- */

.faq { padding: 48px 0 72px; }
.faq h2, .features h2, .section-title {
  font-size: 1.6rem;
  margin-bottom: 26px;
}

.faq details {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--ink-2);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq summary {
  cursor: pointer;
  padding: 16px 20px;
  font-family: var(--heading);
  font-weight: 600;
  font-size: 0.98rem;
  list-style: none;
  position: relative;
  padding-right: 44px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--signal);
  font-size: 1.2rem;
}
.faq details[open] summary::after { content: "\2013"; }
.faq details p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--text-dim);
  font-size: 0.94rem;
}

/* ---------- Pillar pages ---------- */

.page-main { padding: 64px 0 72px; }
.page-main h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: 20px; max-width: 800px; }
.page-main .prose p { color: var(--text-dim); max-width: 760px; }
.page-main h2 { font-size: 1.35rem; margin-top: 44px; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin: 24px 0;
}
.mapping-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 560px;
  font-size: 0.88rem;
}
.mapping-table th, .mapping-table td {
  text-align: left;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
}
.mapping-table tr:last-child td { border-bottom: 0; }
.mapping-table th {
  font-family: var(--heading);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  background: rgba(255, 255, 255, 0.02);
}
.mapping-table code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 7px;
  white-space: nowrap;
}
.mapping-table td:first-child code { color: #8fd0ff; }
.mapping-table td:nth-child(2) code { color: var(--pine); }
.mapping-table td:last-child { color: var(--text-dim); }

.cta-block {
  margin-top: 48px;
  border: 1px solid rgba(201, 241, 88, 0.25);
  border-radius: 14px;
  background:
    radial-gradient(ellipse 70% 120% at 50% -20%, rgba(201, 241, 88, 0.08), transparent),
    var(--ink-2);
  padding: 36px;
  text-align: center;
}
.cta-block h2 { margin-top: 0; }
.cta-block p { color: var(--text-dim); max-width: 560px; margin: 0 auto 24px; }

/* ---------- 404 ---------- */

.notfound {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
}
.notfound .code {
  font-family: var(--heading);
  font-weight: 600;
  font-size: 5rem;
  color: var(--signal);
  line-height: 1;
  margin-bottom: 12px;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  font-size: 0.85rem;
  color: var(--text-faint);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.site-footer a { color: var(--text-dim); }
.site-footer a:hover { color: var(--text); }
.footer-domains { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .converter-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
  .site-nav { gap: 14px; }
  .site-nav .nav-hide-sm { display: none; }
  /* On a phone the address would eat the header; "Sign out" stays, the
     "Signed in as …" label does not. */
  .auth-label { display: none; }
  .converter-toolbar { align-items: stretch; }
  .converter-toolbar .btn-primary,
  .converter-toolbar #validate-btn { width: 100%; }
  .toolbar-spacer { display: none; }
  .direction-group { width: 100%; }
  .direction-group .field { flex: 1; }
  .direction-group select { width: 100%; }
}

/* ---------------------------------------------------------------- pricing */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 8px 0 48px;
  align-items: start;
}

.plan-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* The paid plan is the recommendation, so it says so in the design rather
   than relying on the reader to compare three columns of prose. */
.plan-card-featured {
  border-color: var(--signal);
  box-shadow: 0 0 0 1px rgba(201, 241, 88, 0.25);
}

.plan-card h2 {
  font-family: var(--heading);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0;
}

.plan-price {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.plan-amount {
  font-family: var(--heading);
  font-size: 2.4rem;
  line-height: 1.1;
  color: var(--text);
}

.plan-period { color: var(--text-faint); font-size: 0.95rem; }
.plan-note { margin: 0; color: var(--text-dim); font-size: 0.94rem; }

.plan-list {
  list-style: none;
  padding: 0;
  margin: 6px 0 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  flex: 1;
}

.plan-list li {
  padding-left: 22px;
  position: relative;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.plan-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.55em;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--pine);
}

.plan-card .btn { width: 100%; justify-content: center; text-align: center; }

.plan-fineprint {
  margin: 10px 0 0;
  min-height: 1.2em;
  font-size: 0.88rem;
  color: var(--text-faint);
}

/* ------------------------------------------------- metering & API key */

.usage-chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
  cursor: help;
  align-self: center;
}
.usage-chip[hidden] { display: none; }

.apikey-row { margin-top: 10px; }

.contribute-row { margin-top: 8px; }
.contribute-consent {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-dim);
  cursor: pointer;
  max-width: 640px;
}
.contribute-consent input { flex: none; margin-top: 2px; }
.contribute-consent:hover { color: var(--text); }

.apikey-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 0.84rem;
  color: var(--text-dim);
  cursor: pointer;
}
.apikey-toggle:hover { color: var(--text); text-decoration: underline; }
.apikey-toggle svg { flex: none; }

.apikey-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}
.apikey-panel[hidden] { display: none; }

.apikey-panel input {
  flex: 1;
  min-width: 220px;
  max-width: 420px;
  background: var(--ink);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 7px 10px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
}
.apikey-panel input::placeholder { color: var(--text-faint); }

.apikey-status {
  flex-basis: 100%;
  font-size: 0.8rem;
  color: var(--text-faint);
}
.apikey-status:empty { display: none; }

.quota-panel {
  margin-top: 14px;
  border: 1px solid rgba(232, 185, 90, 0.45);
  border-radius: 12px;
  background: rgba(232, 185, 90, 0.06);
  padding: 16px 18px;
}
.quota-panel[hidden] { display: none; }

.quota-head {
  font-family: var(--heading);
  font-size: 1.05rem;
  color: var(--amber);
  margin-bottom: 6px;
}

.quota-message {
  margin: 0 0 14px;
  color: var(--text-dim);
  font-size: 0.94rem;
  max-width: 640px;
}

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

/* Static note shown on pricing.html when live plan data can't be loaded. */
.pricing-note {
  margin: -8px 0 20px;
  color: var(--text-faint);
  font-size: 0.88rem;
}
.pricing-note[hidden] { display: none; }

/* ---- Terms gate + legal pages ---- */
.terms-row { margin-top: 12px; }
.terms-consent { color: var(--text); }
.terms-consent a { color: var(--signal); }

.output-disclaimer {
  margin: 8px 0 0;
  font-size: 0.78rem;
  color: var(--text-dim);
}
.output-disclaimer a { color: var(--text-dim); text-decoration: underline; }

.legal { padding-bottom: 72px; max-width: 820px; }
.legal .legal-meta { color: var(--text-dim); font-size: 0.86rem; margin-bottom: 28px; }
.legal h2 { font-size: 1.15rem; margin: 30px 0 10px; }
.legal p, .legal li { color: var(--text-dim); font-size: 0.95rem; line-height: 1.6; }
.legal p strong { color: var(--text); }
.legal ul { padding-left: 22px; margin: 8px 0 14px; }
.legal li { margin-bottom: 6px; }

/* ---- Compile feedback (anonymous yes/no under the output pane) ---- */
.feedback-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.feedback-row[hidden] { display: none; }
.feedback-status { color: var(--signal); }

/* ---- Finishing guide: per-warning "how to finish" block ---- */
.diag-hint { margin: 6px 0 2px; font-size: 0.82rem; }
.diag-hint summary { cursor: pointer; color: var(--signal); font-weight: 600; }
.diag-hint p { margin: 6px 0; color: var(--text-dim); }
.diag-hint pre {
  margin: 6px 0 0;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--ink-2);
  font-size: 0.78rem;
  overflow-x: auto;
  white-space: pre;
}