/* ============================================================
   充電番 LP v1 スタイル
   白背景基調・視認性重視。モバイル(375px)ファースト。
   ============================================================ */

:root {
  --color-text: #1f2933;
  --color-text-sub: #52606d;
  --color-bg: #ffffff;
  --color-bg-gray: #f5f7fa;
  --color-bg-accent: #fff7ed;
  --color-primary: #c2410c;      /* 防火を想起する落ち着いた朱 */
  --color-primary-dark: #9a3412;
  --color-border: #d9e2ec;
  --color-ph-bg: #e4e7eb;        /* プレースホルダー灰色 */
  --color-ph-text: #7b8794;
  --color-ok: #166534;
  --max-width: 1080px;
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "BIZ UDPGothic", Meiryo, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.container--narrow { max-width: 720px; }

.sp-only { display: inline; }
@media (min-width: 768px) {
  .sp-only { display: none; }
}

/* ---------- プレースホルダー ---------- */
.ph {
  background: var(--color-ph-bg);
  color: var(--color-ph-text);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.5;
  border: 1px dashed #9aa5b1;
  border-radius: var(--radius);
}
.ph--logo { width: 40px; height: 40px; font-size: 0.6rem; flex-shrink: 0; }
.ph--logo-lg { width: 120px; height: 60px; margin: 0 auto; }
.ph--photo { width: 100%; aspect-ratio: 4 / 3; }
.ph--item { width: 100%; aspect-ratio: 4 / 3; margin-bottom: 16px; }
.ph--avatar { width: 96px; height: 96px; border-radius: 50%; flex-shrink: 0; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  padding-bottom: 10px;
}
.site-header__brand { display: flex; align-items: center; gap: 10px; }
.site-header__name { font-size: 1.15rem; font-weight: 700; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border: 2px solid var(--color-primary);
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn:hover { opacity: 0.85; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--ghost { background: #fff; color: var(--color-primary); }
.btn--sm { padding: 8px 18px; font-size: 0.85rem; }
.btn--block { display: block; width: 100%; border: none; }

/* ---------- セクション共通 ---------- */
.section { padding: 64px 0; }
.section--gray { background: var(--color-bg-gray); }
.section--accent { background: var(--color-bg-accent); }
.section__eyebrow {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-align: center;
  margin-bottom: 8px;
}
.section__title {
  font-size: 1.5rem;
  text-align: center;
  line-height: 1.5;
  margin-bottom: 16px;
}
.section__lead {
  text-align: center;
  color: var(--color-text-sub);
  margin-bottom: 32px;
}
.note {
  font-size: 0.78rem;
  color: var(--color-text-sub);
  margin-top: 16px;
}

@media (min-width: 768px) {
  .section { padding: 88px 0; }
  .section__title { font-size: 2rem; }
}

/* ---------- 1. ファーストビュー ---------- */
.hero {
  background: linear-gradient(180deg, #fff 0%, var(--color-bg-gray) 100%);
  padding: 48px 0 56px;
}
.hero__inner { display: grid; gap: 32px; }
.hero__eyebrow {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}
.hero__title { font-size: 1.65rem; line-height: 1.45; margin-bottom: 16px; }
.hero__lead { color: var(--color-text-sub); margin-bottom: 24px; }
.hero__cta { display: flex; flex-direction: column; gap: 12px; }

@media (min-width: 768px) {
  .hero { padding: 80px 0; }
  .hero__inner { grid-template-columns: 1.15fr 1fr; align-items: center; }
  .hero__title { font-size: 2.3rem; }
  .hero__cta { flex-direction: row; }
}

/* ---------- 2. 課題提起 ---------- */
.stats { display: grid; gap: 16px; margin-bottom: 8px; }
.stat-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.stat-card__num {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.stat-card__unit { font-size: 1rem; margin-left: 2px; }
.stat-card__label { font-size: 0.85rem; color: var(--color-text-sub); margin-top: 8px; }

.problem-list { margin-top: 32px; padding-left: 0; list-style: none; display: grid; gap: 12px; }
.problem-list li {
  background: #fff;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
}

@media (min-width: 768px) {
  .stats { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 3. 解決策 ---------- */
.items { display: grid; gap: 24px; margin-bottom: 48px; }
.item-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}
.item-card__title { font-size: 1.05rem; margin-bottom: 8px; }
.item-card__desc { font-size: 0.9rem; color: var(--color-text-sub); }

.before-after {
  display: grid;
  gap: 8px;
  align-items: center;
  background: var(--color-bg-gray);
  border-radius: var(--radius);
  padding: 24px 20px;
}
.before-after__label {
  text-align: center;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-text-sub);
}
.before-after__label--after { color: var(--color-primary); }
.before-after__arrow {
  text-align: center;
  font-size: 1.6rem;
  color: var(--color-primary);
  transform: rotate(90deg);
}
.before-after__caption { font-size: 0.85rem; color: var(--color-text-sub); margin-top: 8px; text-align: center; }

@media (min-width: 768px) {
  .items { grid-template-columns: repeat(3, 1fr); }
  .before-after { grid-template-columns: 1fr auto 1fr; padding: 32px; }
  .before-after__arrow { transform: none; }
}

/* ---------- 4. 仕組み ---------- */
.features { display: grid; gap: 16px; }
.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}
.feature-card__title { font-size: 1rem; margin-bottom: 8px; color: var(--color-primary-dark); }
.feature-card__desc { font-size: 0.9rem; color: var(--color-text-sub); }

@media (min-width: 768px) {
  .features { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 5. かんたん判定 ---------- */
.hantei-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
}
.hantei-field { border: none; margin-bottom: 24px; }
.hantei-field__label { font-weight: 700; margin-bottom: 10px; display: block; }
.hantei-field__options { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.hantei-field__hint { font-size: 0.78rem; color: var(--color-text-sub); margin-top: 6px; }
.hantei-field__suffix { color: var(--color-text-sub); }

.radio {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.92rem;
}
.radio:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-bg-accent);
  font-weight: 700;
}
.radio input { accent-color: var(--color-primary); }

.input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 1rem;
  width: 100%;
  font-family: inherit;
}
.input:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.input--num { width: 140px; }
.input--textarea { resize: vertical; background: var(--color-bg-gray); }

.hantei-result {
  margin-top: 24px;
  background: #fff;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.hantei-result__badge {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.hantei-result__title { font-size: 1.2rem; margin-bottom: 10px; }
.hantei-result__desc { font-size: 0.92rem; color: var(--color-text-sub); margin-bottom: 18px; text-align: left; }
.hantei-result__disclaimer {
  font-size: 0.75rem;
  color: var(--color-text-sub);
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  text-align: left;
}

@media (min-width: 768px) {
  .hantei-form { padding: 36px; }
}

/* ---------- 6. 信頼性 ---------- */
.trust__supervisor {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  background: var(--color-bg-gray);
  border-radius: var(--radius);
  padding: 28px 20px;
  margin-bottom: 48px;
  text-align: center;
}
.trust__supervisor-role { font-size: 0.85rem; color: var(--color-primary); font-weight: 700; }
.trust__supervisor-name { font-size: 1.25rem; font-weight: 700; margin: 4px 0 10px; }
.trust__supervisor-desc { font-size: 0.9rem; color: var(--color-text-sub); }
.trust__subtitle { text-align: center; font-size: 1.15rem; margin-bottom: 24px; }

.partners { display: grid; gap: 24px; }
.partner { text-align: center; }
.partner__name { font-weight: 700; margin-top: 10px; }
.partner__role { font-size: 0.82rem; color: var(--color-text-sub); }

@media (min-width: 768px) {
  .trust__supervisor { flex-direction: row; text-align: left; padding: 32px 40px; }
  .partners { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 7. 問い合わせフォーム ---------- */
.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
}
.form-field { margin-bottom: 20px; }
.form-field__label { display: block; font-weight: 700; font-size: 0.92rem; margin-bottom: 8px; }
.req {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}
.contact-form__done {
  margin-top: 16px;
  color: var(--color-ok);
  font-weight: 700;
  text-align: center;
}

@media (min-width: 768px) {
  .contact-form { padding: 36px; }
}

/* ---------- フッター ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 28px 0;
  text-align: center;
}
.site-footer__copy { font-size: 0.8rem; color: var(--color-text-sub); }