/* ============================================================
   MailLogic — public resource pages (Domain setup · Send API · FAQ)
   Extends landing.css tokens & components. Inherits dark mode.
   ============================================================ */

/* ---------- page hero ---------- */
.res-hero { padding-block: clamp(40px, 5.5vw, 72px) clamp(30px, 4vw, 48px); }
.res-hero .wrap { max-width: 820px; }
.res-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.07; letter-spacing: -0.025em; margin-top: 14px;
}
.res-hero .sub {
  color: var(--muted); font-size: clamp(16px, 1.6vw, 18.5px);
  line-height: 1.6; margin-top: 16px; max-width: 42em;
}
.res-hero .res-crumb {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12.5px; color: var(--muted-2);
  margin-bottom: 14px;
}
.res-hero .res-crumb a { color: var(--muted-2); }
.res-hero .res-crumb a:hover { color: var(--ink); }
.res-hero .res-crumb svg { width: 13px; height: 13px; opacity: .7; }

/* ---------- generic prose ---------- */
.prose p { color: var(--muted); font-size: 15.5px; line-height: 1.65; }
.prose p + p { margin-top: 12px; }
.prose a { color: var(--primary); font-weight: 500; }
.prose a:hover { text-decoration: underline; text-underline-offset: 3px; }
.prose code {
  font-family: var(--mono); font-size: 0.9em;
  background: var(--bg-inset); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px; color: var(--ink-2);
}

/* ---------- numbered steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 34px; }
.step {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--surface); padding: 24px 22px; box-shadow: var(--shadow-xs);
  display: flex; flex-direction: column;
}
.step .step-n {
  width: 34px; height: 34px; border-radius: 9px; flex: none;
  display: grid; place-items: center; font-family: var(--mono);
  font-size: 14px; font-weight: 600; color: var(--primary);
  background: var(--primary-wash); border: 1px solid var(--primary-line);
}
.step h3 { font-size: 16.5px; margin-top: 16px; }
.step p { color: var(--muted); font-size: 14px; margin-top: 8px; line-height: 1.55; }

/* ---------- record explainer cards ---------- */
.records { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 34px; }
.rec {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--surface); padding: 22px 22px 20px; box-shadow: var(--shadow-xs);
  display: flex; flex-direction: column;
}
.rec.span2 { grid-column: 1 / -1; }
.rec-head { display: flex; align-items: center; gap: 12px; }
.rec-badge {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  color: var(--primary); background: var(--primary-wash);
  border: 1px solid var(--primary-line); border-radius: 6px;
  padding: 4px 11px; letter-spacing: 0.02em; flex: none;
}
.rec-head h3 { font-size: 16.5px; }
.rec-what { color: var(--muted); font-size: 14.5px; line-height: 1.6; margin-top: 13px; }
.rec-what b { color: var(--ink-2); font-weight: 600; }
.rec-eg {
  margin-top: 16px; padding: 11px 13px; border-radius: var(--radius-sm);
  background: var(--code-bg); border: 1px solid var(--code-line);
  font-family: var(--mono); font-size: 12px; line-height: 1.6; color: var(--code-text);
  overflow-x: auto; white-space: nowrap;
}
.rec-eg .k { color: var(--code-dim); }
.rec-eg .v { color: var(--code-green); }
.rec-tag {
  display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
  margin-top: 14px; font-family: var(--mono); font-size: 11.5px; font-weight: 500;
  letter-spacing: 0.03em; text-transform: uppercase;
  color: var(--primary); background: var(--primary-wash);
  border: 1px solid var(--primary-line); border-radius: 999px; padding: 3px 10px;
}
.rec-tag svg { width: 13px; height: 13px; }

/* ---------- readiness callout ---------- */
.callout {
  display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start;
  border: 1px solid var(--primary-line); background: var(--primary-wash);
  border-radius: var(--radius-lg); padding: 20px 22px; margin-top: 34px;
}
.callout .co-ic {
  width: 40px; height: 40px; border-radius: 11px; flex: none;
  display: grid; place-items: center; color: var(--accent-text);
  background: var(--primary); box-shadow: var(--shadow-xs);
}
.callout h3 { font-size: 16px; color: var(--ink); }
.callout p { color: var(--ink-2); font-size: 14.5px; line-height: 1.6; margin-top: 6px; }

/* ---------- domain readiness window footer ---------- */
.win-foot {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 16px; border-top: 1px solid var(--line); background: var(--bg-alt);
  font-size: 13.5px; color: var(--muted);
}
.win-foot svg { width: 17px; height: 17px; color: var(--ok); flex: none; }
.win-foot b { color: var(--ink); font-weight: 600; }

/* ============================================================
   Send API — code blocks with tabs
   ============================================================ */
.api-note {
  display: inline-flex; align-items: center; gap: 9px; flex-wrap: wrap;
  font-size: 13.5px; color: var(--muted); margin-top: 18px;
}
.api-note .chip { background: var(--surface); }

.code-tabs { margin-top: 30px; }
.tabbar { display: flex; gap: 4px; margin-bottom: -1px; position: relative; z-index: 1; }
.tab {
  -webkit-appearance: none; appearance: none; cursor: pointer;
  font-family: var(--mono); font-size: 13px; font-weight: 500;
  color: var(--muted); background: transparent;
  border: 1px solid transparent; border-bottom: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: 9px 16px; transition: color .15s ease, background .15s ease;
}
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] {
  color: var(--code-text); background: var(--code-bg);
  border-color: var(--code-line);
}
.tabpanel { display: none; }
.tabpanel.is-active { display: block; }

/* terminal with header actions (extends .term) */
.term { position: relative; }
.term-bar .lang { margin-left: auto; font-family: var(--mono); font-size: 11.5px; color: var(--code-dim); text-transform: uppercase; letter-spacing: 0.06em; }
.copy-btn {
  -webkit-appearance: none; appearance: none; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 11.5px; font-weight: 500;
  color: var(--code-dim); background: transparent;
  border: 1px solid var(--code-line); border-radius: 6px;
  padding: 4px 9px; margin-left: 12px; transition: color .15s ease, border-color .15s ease;
}
.copy-btn:hover { color: var(--code-text); border-color: #3a4d63; }
.copy-btn.copied { color: var(--code-green); border-color: var(--code-green); }
.copy-btn svg { width: 13px; height: 13px; }
.term pre .cmd { color: var(--code-text); }
.term pre .flag { color: var(--code-blue); }
.term pre .str { color: var(--code-green); }
.term pre .kw { color: var(--code-amber); }
.term pre .fn { color: var(--code-blue); }
.term pre .cmt { color: var(--code-dim); }

.resp { margin-top: 24px; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-group + .faq-group { margin-top: 40px; }
.faq-group > h2 {
  font-size: 18px; padding-bottom: 12px; margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
}
.faq-group > h2 .g-badge {
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  color: var(--primary); background: var(--primary-wash);
  border: 1px solid var(--primary-line); border-radius: 5px;
  padding: 2px 8px; text-transform: uppercase; letter-spacing: 0.05em;
}
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; gap: 16px;
  padding: 18px 4px; font-size: 15.5px; font-weight: 600; color: var(--ink);
  transition: color .15s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-item summary .q-ic {
  margin-left: auto; flex: none; color: var(--muted-2);
  transition: transform .2s ease, color .15s ease;
}
.faq-item[open] summary .q-ic { transform: rotate(45deg); color: var(--primary); }
.faq-item .faq-a { padding: 0 4px 20px; max-width: 62em; }
.faq-item .faq-a p { color: var(--muted); font-size: 14.5px; line-height: 1.65; }
.faq-item .faq-a p + p { margin-top: 10px; }
.faq-item .faq-a a { color: var(--primary); font-weight: 500; }
.faq-item .faq-a a:hover { text-decoration: underline; text-underline-offset: 3px; }
.faq-item .faq-a code {
  font-family: var(--mono); font-size: 0.9em; background: var(--bg-inset);
  border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; color: var(--ink-2);
}

/* ---------- shared: closing help row ---------- */
.help-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap; margin-top: 44px;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--surface); padding: 22px 26px; box-shadow: var(--shadow-xs);
}
.help-row .hr-t h3 { font-size: 17px; }
.help-row .hr-t p { color: var(--muted); font-size: 14px; margin-top: 5px; }
.help-row .hr-acts { display: flex; gap: 10px; flex-wrap: wrap; }

/* ============================================================
   Email Guides
   ============================================================ */
.guide-body { padding-top: 8px; }
.guide-body .wrap { max-width: 1200px; }
.guide-layout {
  display: grid;
  grid-template-columns: minmax(240px, 260px) minmax(0, 820px);
  justify-content: center;
  align-items: start;
  gap: clamp(32px, 4vw, 48px);
}
.guide-sidebar { min-width: 0; }
.guide-browser { min-width: 0; }
.guide-browser > summary {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  color: var(--ink);
  font-weight: 600;
  cursor: pointer;
}
.guide-browser > summary::-webkit-details-marker { display: none; }
.guide-browser > summary::after {
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: rotate(45deg) translateY(-2px);
  transition: transform .15s ease;
}
.guide-browser[open] > summary::after {
  transform: rotate(225deg) translate(-2px, -2px);
}
.guide-browser > summary:focus-visible,
.guide-nav a:focus-visible {
  outline: 3px solid var(--primary-line);
  outline-offset: 2px;
}
.guide-nav h2 {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary);
}
.guide-nav-group { margin-top: 24px; }
.guide-nav-group h3 {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .075em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--muted-2);
}
.guide-nav-group ul {
  display: grid;
  gap: 3px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}
.guide-nav-group a {
  display: block;
  margin-inline-start: -10px;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.35;
  transition: color .15s ease, background .15s ease, box-shadow .15s ease;
}
.guide-nav-group a:hover {
  color: var(--ink);
  background: var(--bg-inset);
}
.guide-nav-group a[aria-current="location"] {
  color: var(--primary-d);
  background: var(--primary-wash);
  box-shadow: inset 3px 0 0 var(--primary);
}
.guide-article {
  min-width: 0;
  max-width: 820px;
  border-top: 1px solid var(--line);
  overflow-wrap: anywhere;
}
.guide-section {
  min-width: 0;
  scroll-margin-top: calc(var(--header-height) + 24px);
  padding-block: clamp(32px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
}
.guide-section h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.18; letter-spacing: -0.015em; max-width: 26em;
}
.guide-section .prose { margin-top: 16px; }
.guide-section .prose ul {
  margin: 12px 0 0; padding-left: 22px;
  color: var(--muted); font-size: 15.5px; line-height: 1.65;
}
.guide-section .prose li + li { margin-top: 6px; }
.guide-section .prose code { overflow-wrap: anywhere; }
.guide-section table {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
}
.guide-code {
  margin: 12px 0 0; padding: 12px 14px;
  border: 1px solid var(--code-line); border-radius: 8px;
  background: var(--code-bg); overflow-x: auto;
  color: var(--code-text); font-family: var(--mono);
  font-size: 12.5px; line-height: 1.6;
}
.guide-code code {
  background: transparent; border: 0; border-radius: 0; padding: 0;
  color: inherit; font-size: inherit;
}
html[lang="ja"] .guide-nav h2,
html[lang="ja"] .guide-nav-group h3 {
  font-family: var(--sans);
  letter-spacing: .04em;
  text-transform: none;
}
html[lang="ja"] .guide-nav-group a { line-height: 1.55; }
@media (min-width: 1041px) {
  .guide-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 22px);
    max-height: calc(100svh - var(--header-height) - 44px);
    padding: 4px 12px 16px 20px;
    border-left: 1px solid var(--line);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--line-2) transparent;
  }
  .guide-browser > summary { display: none; }
}

@media (max-width: 1040px) {
  .guide-layout { grid-template-columns: minmax(0, 820px); }
  .guide-browser {
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-xs);
  }
  .guide-browser > summary { padding: 15px 18px; }
  .guide-browser[open] > summary { border-bottom: 1px solid var(--line); }
  .guide-nav { padding: 20px 18px 22px; }
  .guide-nav-group { margin-top: 20px; }
  .guide-nav-group ul { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 16px; }
  .guide-nav-group a { margin-inline-start: 0; }
}

@media (max-width: 860px) {
  .steps { grid-template-columns: 1fr; }
  .records { grid-template-columns: 1fr; }
  .callout { grid-template-columns: 1fr; }
  .callout .co-ic { display: none; }
}

@media (max-width: 600px) {
  .guide-body { padding-top: 0; }
  .guide-nav-group ul { grid-template-columns: 1fr; }
  .guide-section { padding-block: 36px; }
}