/* ドメイン購入前チェック — domain-check.css */
/* ShoU Neo-Brutalism design system を継承 */

/* ── Design Tokens ────────────────────────────────────────────────── */
:root {
  --color-bg:        #FAF6EE;
  --color-ink:       #1E1F29;
  --color-orange:    #F2994A;
  --color-gold:      #FFB84D;
  --color-warm:      #E07A5F;
  --color-gold-lt:   #FFD66B;
  --color-text:      #43474f;
  --color-muted:     #5a5f68;
  --color-green:     #7BC9A4;
  --color-blue:      #8FBCE6;
  --color-red:       #E07A5F;
  --color-yellow:    #FFD66B;
  --color-dark-bg:   #1E1F29;
  --color-dark-text: #FAF6EE;

  --border:    3px solid #1E1F29;
  --border-sm: 2px solid #1E1F29;
  --shadow:    4px 4px 0 #1E1F29;
  --shadow-lg: 8px 8px 0 #1E1F29;

  --radius-card:    16px;
  --radius-card-lg: 24px;
  --radius-pill:    999px;

  --font-heading: 'Zen Maru Gothic', sans-serif;
  --font-body:    'Zen Kaku Gothic New', sans-serif;
  --font-label:   'Space Grotesk', sans-serif;

  /* コンテンツ幅: ナビ・ヒーロー・フッターはワイド、本文は狭め */
  --max-width-wide:   1160px;
  --max-width-narrow: 720px;
  --pad-x: 32px;
}

/* ── Reset ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  background: var(--color-bg);
  font-family: var(--font-body);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
::selection { background: #FFD085; color: var(--color-ink); }

/* ── Layout helpers ───────────────────────────────────────────────── */
/* 本文コンテンツ（診断結果・FAQなど）用の狭いコンテナ */
.dc-container {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

/* ── Navigation ───────────────────────────────────────────────────── */
.dc-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 246, 238, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: var(--border-sm);
}

.dc-nav-inner {
  max-width: var(--max-width-wide);
  margin-inline: auto;
  padding: 0 var(--pad-x);
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.dc-logo {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 32px;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: -1px;
  line-height: 1;
  flex-shrink: 0;
  transition: opacity 0.15s;
}
.dc-logo:hover { opacity: 0.8; }
.dc-logo .logo-h { color: var(--color-orange); }
.dc-logo .logo-u { color: var(--color-gold); }

.dc-nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.dc-nav-links a {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 13px;
  color: var(--color-ink);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: var(--border-sm);
  background: transparent;
  transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
  white-space: nowrap;
}
.dc-nav-links a:hover {
  background: var(--color-gold-lt);
  box-shadow: var(--shadow);
  transform: translate(-1px, -1px);
}

/* ハンバーガーボタン（SP用） */
.dc-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: var(--border-sm);
  border-radius: 10px;
  cursor: pointer;
  padding: 8px 10px;
  flex-shrink: 0;
}
.dc-nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ── Hero ─────────────────────────────────────────────────────────── */
.dc-hero-wrap {
  max-width: var(--max-width-wide);
  margin-inline: auto;
  padding: 72px var(--pad-x) 64px;
  position: relative;
  overflow: hidden;
}

/* 背景装飾（CSSのみ） */
.dc-hero-wrap::before {
  content: '';
  position: absolute;
  width: 360px;
  height: 360px;
  background: var(--color-gold);
  opacity: 0.12;
  border-radius: 50%;
  top: -100px;
  right: -80px;
  pointer-events: none;
  z-index: 0;
}
.dc-hero-wrap::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  background: var(--color-orange);
  opacity: 0.08;
  border-radius: 50%;
  bottom: 0;
  left: 60px;
  pointer-events: none;
  z-index: 0;
}

.dc-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.dc-hero-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 8px;
}

/* ラベル */
.dc-label {
  display: inline-block;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--color-muted);
  background: var(--color-gold-lt);
  border: var(--border-sm);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  width: fit-content;
}
.dc-label-dark {
  background: rgba(255,255,255,0.15);
  color: var(--color-dark-text);
  border-color: rgba(255,255,255,0.3);
}

.dc-h1 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  letter-spacing: -0.5px;
}

.dc-subcopy {
  font-size: clamp(14px, 1.5vw, 16px);
  color: var(--color-muted);
  line-height: 1.8;
}

/* 「このツールでわかること」 */
.dc-hero-features {
  background: rgba(255,255,255,0.6);
  border: var(--border-sm);
  border-radius: var(--radius-card);
  padding: 20px 20px 18px;
}
.dc-hero-features-title {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--color-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.dc-hero-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dc-hero-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
}
.dc-list-icon {
  color: var(--color-orange);
  font-weight: 900;
  font-size: 15px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* 免責補足 */
.dc-hero-note {
  font-size: 12px;
  color: var(--color-muted);
  line-height: 1.75;
  padding: 12px 16px;
  background: rgba(0,0,0,0.04);
  border-left: 3px solid var(--color-orange);
  border-radius: 0 8px 8px 0;
}
.dc-hero-note strong { color: var(--color-ink); }

/* ── Form card (右カラム) ─────────────────────────────────────────── */
.dc-hero-right { }

.dc-card {
  background: var(--color-bg);
  border: var(--border);
  border-radius: var(--radius-card-lg);
  box-shadow: var(--shadow-lg);
}

.dc-form-card {
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.dc-form-group { display: flex; flex-direction: column; gap: 8px; }

.dc-form-label {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.5px;
  color: var(--color-ink);
}

.dc-input {
  width: 100%;
  padding: 13px 16px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-ink);
  background: #fff;
  border: var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  outline: none;
  transition: box-shadow 0.15s, transform 0.15s;
}
.dc-input:focus {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}
.dc-input.dc-input-error { border-color: var(--color-red); }
.dc-input-error-msg {
  font-size: 13px;
  color: var(--color-red);
  font-weight: 600;
  margin-top: 4px;
}
.dc-input-hint { font-size: 11px; color: var(--color-muted); }

/* ── Purpose chips ────────────────────────────────────────────────── */
.dc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.dc-chip {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 12px;
  padding: 7px 14px;
  background: var(--color-bg);
  border: var(--border-sm);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.12s, transform 0.1s;
  color: var(--color-ink);
}
.dc-chip:hover { background: var(--color-gold-lt); }
.dc-chip.active {
  background: var(--color-gold);
  border: var(--border);
  box-shadow: var(--shadow);
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.dc-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 15px;
  padding: 15px 28px;
  background: var(--color-orange);
  color: #fff;
  border: var(--border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  width: 100%;
}
.dc-btn-primary:hover  { transform: translate(-2px, -2px); box-shadow: 10px 10px 0 #1E1F29; }
.dc-btn-primary:active { transform: translate(0, 0); box-shadow: var(--shadow); }
.dc-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.dc-btn-primary:focus-visible { outline: 3px solid var(--color-orange); outline-offset: 3px; }

.dc-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 13px;
  padding: 10px 20px;
  background: var(--color-bg);
  color: var(--color-ink);
  border: var(--border-sm);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.dc-btn-ghost:hover { background: var(--color-gold-lt); transform: translate(-1px, -1px); }

.dc-btn-action {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 13px;
  padding: 8px 16px;
  background: var(--color-ink);
  color: var(--color-dark-text);
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: opacity 0.15s;
}
.dc-btn-action:hover { opacity: 0.8; }
.dc-btn-action::after { content: ' ↗'; }

/* ── Disclaimer small ─────────────────────────────────────────────── */
.dc-disclaimer-small {
  font-size: 11px;
  color: var(--color-muted);
  line-height: 1.7;
  text-align: center;
}

/* ── Loading ──────────────────────────────────────────────────────── */
.dc-loading {
  max-width: var(--max-width-narrow);
  margin-inline: auto;
  padding: 56px var(--pad-x);
  text-align: center;
}
.dc-loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.dc-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #e8e0d4;
  border-top-color: var(--color-orange);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.dc-loading-text {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-muted);
}

/* ── Results ──────────────────────────────────────────────────────── */
.dc-results {
  max-width: var(--max-width-narrow);
  margin-inline: auto;
  padding: 0 var(--pad-x) 72px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* ── Verdict ──────────────────────────────────────────────────────── */
.dc-verdict {
  border: var(--border);
  border-radius: var(--radius-card-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px 28px;
}
.dc-verdict-ok      { background: var(--color-green); }
.dc-verdict-caution { background: var(--color-yellow); }
.dc-verdict-stop    { background: var(--color-red); }
.dc-verdict-unknown { background: var(--color-blue); }

.dc-verdict-label {
  display: inline-block;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 2px;
  background: rgba(30,31,41,0.12);
  border: 1.5px solid rgba(30,31,41,0.2);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.dc-verdict-summary {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(17px, 2.5vw, 21px);
  line-height: 1.5;
  margin-bottom: 10px;
}
.dc-verdict-rec {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.75;
}

/* verdict badges（サンプルセクション用） */
.dc-verdict-badge {
  display: inline-block;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 13px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  border: var(--border-sm);
  margin-bottom: 12px;
}
.dc-badge-ok      { background: var(--color-green); }
.dc-badge-caution { background: var(--color-yellow); }

/* ── Section heading ──────────────────────────────────────────────── */
.dc-section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 16px;
}

/* ── Diagnostic cards ─────────────────────────────────────────────── */
.dc-cards { display: flex; flex-direction: column; gap: 16px; }

.dc-diag-card { overflow: hidden; }

.dc-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 22px 0;
}
.dc-card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
}
.dc-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex-shrink: 0;
}

.dc-badge {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1.5px solid rgba(30,31,41,0.25);
  white-space: nowrap;
}
.dc-badge-imp.imp-high   { background: #ffd6d6; }
.dc-badge-imp.imp-mid    { background: var(--color-yellow); }
.dc-badge-imp.imp-low    { background: #e8f5e9; }
.dc-badge-status.status-mock        { background: #e8e0d4; }
.dc-badge-status.status-success     { background: var(--color-green); }
.dc-badge-status.status-partial     { background: var(--color-yellow); }
.dc-badge-status.status-unavailable { background: #dde6f0; }
.dc-badge-status.status-failed      { background: #ffd6d6; }

.dc-card-body {
  padding: 14px 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dc-result-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.dc-result-label {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--color-muted);
  flex-shrink: 0;
}
.dc-result-val {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
}

.dc-conf-label {
  font-family: var(--font-label);
  font-size: 11px;
  color: var(--color-muted);
}

.dc-card-comment {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-text);
}

.dc-usecase-comment {
  background: rgba(255,184,77,0.15);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 8px 8px 0;
  padding: 10px 14px;
}
.dc-usecase-label {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--color-muted);
  display: block;
  margin-bottom: 4px;
}
.dc-usecase-comment p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text);
}

.dc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dc-evidence-details {
  border: var(--border-sm);
  border-radius: 10px;
  overflow: hidden;
}
.dc-evidence-details summary {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 12px;
  padding: 8px 14px;
  cursor: pointer;
  color: var(--color-muted);
  user-select: none;
  list-style: none;
}
.dc-evidence-details summary::-webkit-details-marker { display: none; }
.dc-evidence-details summary:hover { background: rgba(0,0,0,0.04); }
.dc-evidence-body {
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: var(--border-sm);
}
.dc-evidence-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  gap: 8px;
}
.dc-evidence-row span:first-child { color: var(--color-muted); }
.dc-evidence-row span:last-child  { font-weight: 600; text-align: right; }
.dc-evidence-source { font-style: italic; }

.dc-limitation {
  font-size: 12px;
  color: var(--color-muted);
  background: rgba(0,0,0,0.04);
  border-radius: 8px;
  padding: 8px 12px;
  line-height: 1.6;
}
.dc-limit-icon { font-weight: 700; }

/* ── Share text ───────────────────────────────────────────────────── */
.dc-share-card {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.dc-share-text {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-all;
  background: rgba(0,0,0,0.04);
  border-radius: 8px;
  padding: 14px;
}

/* ── Disclaimer ───────────────────────────────────────────────────── */
.dc-disclaimer-card {
  padding: 18px 22px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: rgba(255,184,77,0.1);
}
.dc-disclaimer-icon { font-size: 18px; flex-shrink: 0; margin-top: 2px; }
.dc-disclaimer-text { font-size: 13px; line-height: 1.8; color: var(--color-muted); }

.dc-back-wrap { text-align: center; }

/* ── Content sections（how-to-use / sample / use-case / faq） ──── */
.dc-content-section {
  padding: 80px var(--pad-x);
  border-top: var(--border-sm);
}
.dc-content-section h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(20px, 2.5vw, 26px);
  margin-bottom: 32px;
}
.dc-content-section > .dc-container { }

.dc-dark {
  background: var(--color-dark-bg);
  color: var(--color-dark-text);
  border-top: none;
}
.dc-dark h2 { color: var(--color-dark-text); }

/* ── Steps ────────────────────────────────────────────────────────── */
.dc-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.dc-step-card {
  background: var(--color-bg);
  border: var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 24px 20px;
}
.dc-step-num {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 13px;
  color: var(--color-orange);
  display: block;
  margin-bottom: 8px;
}
.dc-step-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 8px;
}
.dc-step-card p { font-size: 13px; line-height: 1.75; color: var(--color-muted); }

/* ── Sample cards ─────────────────────────────────────────────────── */
.dc-sample-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.dc-sample-card {
  padding: 24px 20px;
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
  box-shadow: 4px 4px 0 rgba(255,255,255,0.12);
}
.dc-sample-desc {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,0.72);
}

/* ── Use case grid ────────────────────────────────────────────────── */
.dc-usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.dc-usecase-card { padding: 20px 18px; }
.dc-usecase-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
}
.dc-usecase-card p { font-size: 13px; line-height: 1.7; color: var(--color-muted); }

/* ── FAQ ──────────────────────────────────────────────────────────── */
.dc-faqs { display: flex; flex-direction: column; gap: 12px; }
.dc-faq {
  border: var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.dc-faq summary {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background 0.15s;
  user-select: none;
}
.dc-faq summary::-webkit-details-marker { display: none; }
.dc-faq summary::after {
  content: '+';
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 20px;
  color: var(--color-orange);
  flex-shrink: 0;
  transition: transform 0.2s;
}
.dc-faq[open] summary::after { transform: rotate(45deg); }
.dc-faq summary:hover { background: rgba(0,0,0,0.04); }
.dc-faq p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
  padding: 0 20px 18px;
  border-top: var(--border-sm);
}

/* ── Footer ───────────────────────────────────────────────────────── */
.dc-footer {
  background: var(--color-orange);
  border-top: var(--border);
  padding: 60px var(--pad-x) 48px;
}

.dc-footer-inner {
  max-width: var(--max-width-wide);
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
}

.dc-footer-left {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* フッターロゴ */
.dc-logo-footer {
  font-size: 36px;
  letter-spacing: -1px;
  text-decoration: none;
  color: var(--color-ink);
}
.dc-logo-footer .logo-h-footer { color: #fff; }
.dc-logo-footer .logo-u-footer { color: var(--color-gold); }
.dc-logo-footer:hover { opacity: 0.85; }

.dc-footer-tagline {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 14px;
  color: rgba(30,31,41,0.65);
}

.dc-footer-copy {
  font-family: var(--font-label);
  font-size: 11px;
  color: rgba(30,31,41,0.5);
  margin-top: 8px;
}

/* フッターナビ */
.dc-footer-nav {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-end;
  padding-top: 4px;
}
.dc-footer-nav a {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 14px;
  color: var(--color-ink);
  text-decoration: none;
  transition: opacity 0.15s;
}
.dc-footer-nav a:hover { opacity: 0.65; }

/* ── Responsive ───────────────────────────────────────────────────── */

/* タブレット: 960px 以下でヒーローを1カラムに */
@media (max-width: 960px) {
  :root { --pad-x: 24px; }

  .dc-hero-wrap { padding: 56px var(--pad-x) 48px; }

  .dc-hero-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .dc-hero-left { padding-top: 0; }

  .dc-steps        { grid-template-columns: repeat(3, 1fr); }
  .dc-usecase-grid { grid-template-columns: repeat(2, 1fr); }
  .dc-sample-cards { grid-template-columns: repeat(2, 1fr); }
}

/* SP: 640px 以下 */
@media (max-width: 640px) {
  :root { --pad-x: 16px; }

  /* ナビ */
  .dc-nav-inner { height: 60px; }
  .dc-logo { font-size: 26px; }

  .dc-nav-toggle { display: flex; }
  .dc-nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-bg);
    border-bottom: var(--border-sm);
    padding: 8px 16px 16px;
    gap: 6px;
    z-index: 99;
  }
  .dc-nav-links.open { display: flex; }
  .dc-nav-links a {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
  }

  /* ヒーロー */
  .dc-hero-wrap { padding: 40px 16px 36px; }
  .dc-hero-inner { gap: 28px; }
  .dc-form-card  { padding: 20px 16px; }

  /* コンテンツ */
  .dc-content-section { padding: 56px 16px; }
  .dc-content-section h2 { margin-bottom: 24px; }
  .dc-steps        { grid-template-columns: 1fr; }
  .dc-usecase-grid { grid-template-columns: 1fr; }
  .dc-sample-cards { grid-template-columns: 1fr; }

  /* 診断カード */
  .dc-card-header { flex-direction: column; padding: 16px 16px 0; }
  .dc-card-body   { padding: 12px 16px 16px; }

  /* 結果 */
  .dc-results       { padding: 0 16px 56px; gap: 28px; }
  .dc-verdict       { padding: 24px 18px; }
  .dc-share-card    { padding: 16px; }
  .dc-disclaimer-card { padding: 14px 16px; }

  /* フッター */
  .dc-footer { padding: 48px 16px 36px; }
  .dc-footer-inner {
    flex-direction: column;
    gap: 32px;
  }
  .dc-footer-nav {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }
  .dc-logo-footer { font-size: 30px; }
}