/* スマホでできる はじめてのAI体験会 — LP styles
   Palette / typography: SonRisa 確定値（design-system/ai-taikenkai-iwanuma/MASTER.md 冒頭） */

:root {
  --color-bg: #FAF8F5;
  --color-bg-soft: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #6E6E6E;
  --color-accent: #F2A233;
  --color-accent-text: #A85F00;
  --color-border: #E5E3DF;
  --radius: 16px;
  --radius-pill: 999px;
  --container-width: 680px;
  --font: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  padding-bottom: 88px; /* sticky CTA 分 */
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent-text); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-accent-text);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.brand img { width: 110px; height: auto; }
.header-tel {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-decoration: none;
  color: var(--color-accent-text);
  border: 2px solid var(--color-accent-text);
  border-radius: 12px;
  padding: 6px 12px;
  min-height: 44px;
  line-height: 1.2;
}
.header-tel-label { font-size: 12px; font-weight: 700; }
.header-tel-number { font-size: 16px; font-weight: 700; letter-spacing: 0.02em; }

/* ---------- Buttons ---------- */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  padding: 14px 24px;
  border-radius: var(--radius-pill);
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  transition: background-color 200ms ease, transform 150ms ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-text);
  box-shadow: 0 4px 14px rgba(242, 162, 51, 0.35);
}
.btn-primary:hover { background: #E8952A; }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary {
  background: var(--color-bg-soft);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  font-size: 17px;
  min-height: 56px;
}
.btn-secondary:hover { border-color: var(--color-accent-text); }
.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

/* ---------- Hero ---------- */
.hero { padding: 36px 0 32px; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--color-accent-text);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
}
.hero-title {
  margin: 0 0 14px;
  font-size: 32px;
  line-height: 1.3;
  font-weight: 800;
}
.hero-lead {
  margin: 0 0 22px;
  font-size: 19px;
  line-height: 1.7;
}

/* 情報カード（シグネチャ: 左端の太い橙の縦線） */
.info-card {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-left: 8px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 0 0 18px;
}
.info-card dl { margin: 0; }
.info-row {
  display: grid;
  grid-template-columns: 4em 1fr;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
}
.info-row:last-child { border-bottom: 0; }
.info-row dt {
  color: var(--color-accent-text);
  font-weight: 700;
  font-size: 16px;
  padding-top: 3px;
}
.info-row dd { margin: 0; line-height: 1.6; }
.info-row strong { font-size: 20px; }
.note { font-size: 15px; color: var(--color-text-muted); }

/* ---------- Sections ---------- */
.section { padding: 40px 0; }
.section-soft { background: var(--color-bg-soft); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.section-title {
  margin: 0 0 18px;
  font-size: 26px;
  line-height: 1.3;
  padding-left: 14px;
  border-left: 6px solid var(--color-accent);
}
.section-text { margin: 16px 0 0; }

.voice-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.voice-list li {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 19px;
  font-weight: 700;
}
.voice-list li::before { content: "「"; color: var(--color-accent-text); }
.voice-list li::after { content: "」"; color: var(--color-accent-text); }

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.timeline li {
  display: grid;
  grid-template-columns: 7.5em 1fr;
  gap: 12px;
  align-items: start;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.timeline .time {
  color: var(--color-accent-text);
  font-weight: 700;
  font-size: 16px;
  padding-top: 3px;
}
.timeline .what { font-size: 18px; line-height: 1.6; }

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.check-list li {
  position: relative;
  padding-left: 36px;
  line-height: 1.7;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
}
.check-list li::after {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  width: 6px;
  height: 11px;
  border: solid var(--color-text);
  border-width: 0 3px 3px 0;
  transform: rotate(45deg);
}

/* ---------- Teacher ---------- */
.teacher {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  align-items: start;
}
.teacher-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}
.teacher-name {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
}
.teacher-org {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-muted);
}
.teacher-text { margin: 0; font-size: 17px; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; }
.faq details {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0 18px;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 32px 16px 0;
  font-weight: 700;
  font-size: 18px;
  position: relative;
  min-height: 56px;
  display: flex;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "＋";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent-text);
  font-size: 24px;
  font-weight: 700;
}
.faq details[open] summary::after { content: "－"; }
.faq details p { margin: 0 0 16px; font-size: 17px; }

/* ---------- Apply ---------- */
.section-apply { background: var(--color-bg-soft); border-top: 1px solid var(--color-border); }
.form-wrap {
  margin: 20px 0 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.form-wrap iframe { display: block; width: 100%; border: 0; }
.form-fallback { margin: 0; padding: 12px 16px; font-size: 15px; color: var(--color-text-muted); border-top: 1px solid var(--color-border); }

.alt-apply { display: grid; gap: 16px; }
.alt-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.alt-item h3 { margin: 0 0 12px; font-size: 20px; }
.alt-item p { margin: 0 0 14px; font-size: 16px; }
.alt-item .qr { width: 160px; height: 160px; margin: 0 auto 12px; }
.tel-big { font-size: 28px; font-weight: 800; letter-spacing: 0.02em; }
.tel-big a { text-decoration: none; color: var(--color-text); }

/* ---------- Footer ---------- */
.site-footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--color-border);
  font-size: 15px;
  color: var(--color-text-muted);
}
.site-footer p { margin: 0 0 6px; }
.site-footer a,
.form-fallback a,
.tel-big a {
  display: inline-block;
  padding: 10px 4px;
  margin: -6px -4px;
  min-height: 44px;
  line-height: 24px;
}
.tel-big a { line-height: 1.3; }
.footer-org { color: var(--color-text); font-weight: 700; font-size: 16px; }
.copyright { margin-top: 12px; }

/* ---------- Sticky CTA (mobile) ---------- */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--color-border);
  z-index: 20;
}
.sticky-cta .btn { min-height: 56px; }

/* ---------- Tablet / PC ---------- */
@media (min-width: 768px) {
  body { padding-bottom: 0; font-size: 18px; }
  .sticky-cta { display: none; }
  .hero { padding: 56px 0 48px; }
  .hero-title { font-size: 40px; }
  .hero-lead { font-size: 21px; }
  .section { padding: 56px 0; }
  .section-title { font-size: 28px; }
  .alt-apply { grid-template-columns: 1fr 1fr; }
  .teacher { grid-template-columns: 160px 1fr; gap: 24px; }
  .teacher-photo { width: 160px; height: 160px; }
  .brand img { width: 130px; }
}

/* ---------- Narrow (320px) ---------- */
@media (max-width: 359px) {
  .hero-title { font-size: 28px; }
  .btn { font-size: 18px; }
  .btn-row { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 4px; }
  .info-row { grid-template-columns: 1fr; gap: 2px; }
  .teacher { grid-template-columns: 1fr; justify-items: center; text-align: center; }
}