/* ===== リセット・ベース ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ボット対策ハニーポット：人間には見えない */
.hp-field { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; pointer-events: none; }

:root {
  --primary: #1a5fa8;
  --primary-dark: #134a85;
  --primary-light: #e8f0fb;
  --accent: #f5a623;
  --accent-dark: #e09515;
  --text: #1a1a2e;
  --text-muted: #666;
  --bg: #fff;
  --bg-alt: #f7f9fc;
  --border: #e0e6ef;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(26,95,168,.10);
  --shadow-lg: 0 8px 40px rgba(26,95,168,.16);
  --transition: .25s ease;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: .75; }

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

/* ===== コンテナ ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== ボタン ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); opacity: 1; }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; opacity: 1; }

.btn-full { width: 100%; display: block; }
.btn-lg { padding: 18px 40px; font-size: 1.1rem; }

.btn-nav {
  background: var(--accent);
  color: #fff;
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 700;
  font-size: .9rem;
}
.btn-nav:hover { background: var(--accent-dark); opacity: 1; }

/* ===== セクション共通 ===== */
.section { padding: 88px 0; }
.section:nth-child(even) { background: var(--bg-alt); }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-label {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-desc {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== ヘッダー ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.97);
  box-shadow: 0 2px 12px rgba(0,0,0,.07);
  transition: box-shadow var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo a { display: flex; flex-direction: column; line-height: 1.15; }
.logo-main {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
}
.logo-sub {
  font-size: .65rem;
  letter-spacing: .18em;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  font-size: .9rem;
  font-weight: 500;
}
.nav-list a:not(.btn-nav):hover { color: var(--primary); opacity: 1; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== ヒーロー ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 68px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #e8f0fb 0%, #f0f6ff 40%, #fff8ec 100%);
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  right: -10%;
  top: 10%;
  width: 55%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(26,95,168,.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  padding: 80px 24px 80px max(24px, calc((100vw - 1100px)/2 + 24px));
}

.hero-catch {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: .85rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 50px;
  margin-bottom: 20px;
  letter-spacing: .05em;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 24px;
  color: var(--text);
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 36px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 実績バナー ===== */
.achievements {
  background: var(--primary);
  padding: 40px 0;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.achievement-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  border-right: 1px solid rgba(255,255,255,.2);
  color: #fff;
}
.achievement-item:last-child { border-right: none; }

.achievement-num {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.1;
  font-family: var(--font-serif);
}
.achievement-num small { font-size: 1rem; }
.achievement-label {
  font-size: .8rem;
  margin-top: 6px;
  opacity: .85;
}

/* ===== 特徴 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 52px;
  height: 52px;
  color: var(--primary);
  margin-bottom: 18px;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-text {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== コース ===== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

.course-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  position: relative;
  border: 2px solid transparent;
  transition: all var(--transition);
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.course-featured {
  border-color: var(--primary);
  transform: scale(1.03);
}
.course-featured:hover { transform: scale(1.03) translateY(-4px); }

.course-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 50px;
  white-space: nowrap;
}

.course-header { margin-bottom: 20px; }
.course-grade {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: .78rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 50px;
  margin-bottom: 8px;
}
.course-name {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
}

.course-subjects {
  list-style: none;
  margin-bottom: 24px;
}
.course-subjects li {
  font-size: .88rem;
  color: var(--text-muted);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  padding-left: 16px;
  position: relative;
}
.course-subjects li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.course-price {
  margin-bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 4px;
  flex-wrap: wrap;
}
.price-from { font-size: .8rem; color: var(--text-muted); }
.price-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-serif);
}
.price-num small { font-size: 1rem; }
.price-note { font-size: .78rem; color: var(--text-muted); width: 100%; }

.courses-note {
  text-align: center;
  font-size: .85rem;
  color: var(--text-muted);
  margin-top: 28px;
}

.course-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 14px;
  font-size: .85rem;
}
.course-table th {
  background: var(--primary-light);
  color: var(--primary);
  padding: 7px 6px;
  text-align: center;
  font-weight: 700;
  font-size: .78rem;
  border-bottom: 2px solid var(--primary);
}
.course-table td {
  padding: 9px 6px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.course-table td:last-child {
  font-weight: 700;
  color: var(--primary);
}
.course-table small {
  display: block;
  font-size: .7rem;
  color: var(--text-muted);
  font-weight: 400;
}
.course-text-fee {
  font-size: .78rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  padding: 8px 10px;
  background: var(--bg-alt);
  border-radius: 6px;
  line-height: 1.6;
}

/* ===== 入塾の流れ ===== */
.flow-steps { max-width: 680px; margin: 0 auto; }

.flow-step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
}

.step-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-serif);
  min-width: 56px;
  line-height: 1;
  padding-top: 2px;
}

.step-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-content p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.flow-arrow {
  text-align: center;
  font-size: 1.5rem;
  color: var(--primary);
  opacity: .4;
  margin: 8px 0;
}

/* ===== 合格実績 ===== */
.results-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.result-item {
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.result-school { font-weight: 700; font-size: .95rem; }
.result-year { font-size: .75rem; opacity: .7; }

.voices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.voice-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.voice-text {
  font-size: .9rem;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-style: italic;
}
.voice-text::before { content: '「'; }
.voice-text::after { content: '」'; }

.voice-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.voice-grade {
  background: var(--primary-light);
  color: var(--primary);
  font-size: .75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 50px;
}
.voice-name { font-size: .85rem; font-weight: 700; }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; }

.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child { border-top: 1px solid var(--border); }

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  gap: 16px;
}
.faq-q::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}
details[open] .faq-q::after {
  transform: rotate(45deg);
}
.faq-q::-webkit-details-marker { display: none; }

.faq-a {
  padding: 0 0 20px 0;
  color: var(--text-muted);
  line-height: 1.8;
  font-size: .95rem;
}

/* ===== アクセス ===== */
.access-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
  align-items: start;
}

.access-list { margin-bottom: 28px; }

.access-row {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
}
.access-row:first-child { border-top: 1px solid var(--border); }

.access-row dt, .access-row dd {
  padding: 14px 16px;
  font-size: .93rem;
  line-height: 1.7;
}
.access-row dt {
  background: var(--bg-alt);
  font-weight: 700;
  min-width: 90px;
  flex-shrink: 0;
}
.access-row dd a { color: var(--primary); text-decoration: underline; }
.access-row dd small { color: var(--text-muted); font-size: .82rem; }

.btn-map { margin-top: 8px; }

.access-map {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.access-map iframe { display: block; width: 100%; }

/* ===== お問い合わせ ===== */
.contact.section { background: var(--primary-light); }

.contact-inner {
  max-width: 680px;
  margin: 0 auto;
}

.contact-tel {
  text-align: center;
  margin-bottom: 40px;
  padding: 28px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.contact-tel-label { font-size: .85rem; color: var(--text-muted); margin-bottom: 8px; }
.contact-tel-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-serif);
  margin-bottom: 4px;
}
.contact-tel-hours { font-size: .8rem; color: var(--text-muted); }

.contact-form {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.form-group { margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group label {
  display: block;
  font-weight: 700;
  font-size: .9rem;
  margin-bottom: 7px;
}
.required {
  background: #e74c3c;
  color: #fff;
  font-size: .7rem;
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: .95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: #fafafa;
  color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
}

.form-radios {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  font-size: .92rem;
  cursor: pointer;
}

.form-privacy { margin-top: 8px; }
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  font-size: .88rem;
  cursor: pointer;
}
.checkbox-label a { color: var(--primary); text-decoration: underline; }

/* ===== フッター ===== */
.footer {
  background: #1a1a2e;
  color: rgba(255,255,255,.85);
  padding: 56px 0 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding-bottom: 48px;
}

.footer .logo-main { color: #fff; font-size: 1.1rem; }
.footer .logo-sub { color: rgba(255,255,255,.5); }
.footer-tagline {
  margin-top: 10px;
  font-size: .83rem;
  color: rgba(255,255,255,.5);
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: flex-end;
}
.footer-nav a { font-size: .85rem; color: rgba(255,255,255,.75); }
.footer-nav a:hover { color: #fff; opacity: 1; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 18px 0;
  text-align: center;
  font-size: .78rem;
  color: rgba(255,255,255,.4);
}

/* ===== スクロールトップ ===== */
.scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  z-index: 99;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }

/* ===== タッチデバイス最適化 ===== */
@media (hover: none) {
  .feature-card:hover,
  .course-card:hover,
  .course-featured:hover { transform: none; box-shadow: var(--shadow); }
}

/* ===== タブレット（〜960px）===== */
@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .section-header { margin-bottom: 44px; }

  /* ナビ */
  .nav-list { gap: 18px; font-size: .85rem; }

  /* ヒーロー */
  .hero-content { max-width: 100%; }
  .hero-desc br { display: none; }

  /* 実績バナー：2×2グリッド */
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
  .achievement-item:nth-child(2),
  .achievement-item:nth-child(4) { border-right: none; }
  .achievement-item:nth-child(1),
  .achievement-item:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,.2); }

  /* 特徴 */
  .features-grid { grid-template-columns: repeat(2, 1fr); }

  /* コース */
  .courses-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .course-featured { transform: none; }
  .course-featured:hover { transform: translateY(-4px); }

  /* 合格実績・声 */
  .results-grid { grid-template-columns: repeat(3, 1fr); }
  .voices-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }

  /* アクセス */
  .access-inner { grid-template-columns: 1fr; }
}

/* ===== スマートフォン（〜720px）===== */
@media (max-width: 720px) {
  /* ナビ：ハンバーガーメニュー */
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: #fff;
    padding: 16px 24px 24px;
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 68px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }
  .nav-list li { width: 100%; }
  .nav-list a:not(.btn-nav) {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }
  .nav-list li:last-child a:not(.btn-nav) { border-bottom: none; }
  .nav-list li:last-child { padding-top: 14px; }
  .btn-nav { display: inline-block; width: auto; }

  /* ハンバーガー：×アニメーション */
  .hamburger { display: flex; }
  .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* セクション共通 */
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 36px; }
  .section-title { font-size: 1.6rem; }

  /* ヒーロー */
  .hero { min-height: 100svh; }
  .hero-content { padding: 56px 24px 52px; }
  .hero-desc br { display: none; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; }

  /* 実績バナー */
  .achievements { padding: 32px 0; }

  /* 特徴 */
  .features-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 24px; }

  /* フロー */
  .flow-step { padding: 22px 24px; gap: 18px; }
  .step-num { font-size: 1.6rem; min-width: 44px; }

  /* 合格実績 */
  .results-grid { grid-template-columns: repeat(2, 1fr); }

  /* フォーム */
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 20px; }
  .contact-tel-num { font-size: 1.7rem; }

  /* フッター */
  .footer-inner { flex-direction: column; gap: 28px; padding-bottom: 36px; }
  .footer-nav ul { justify-content: flex-start; }

  /* スクロールトップ */
  .scroll-top { bottom: 20px; right: 20px; }
}

/* ===== 小型スマートフォン（〜480px）===== */
@media (max-width: 480px) {
  .container { padding: 0 16px; }

  /* セクション共通 */
  .section { padding: 48px 0; }
  .section-header { margin-bottom: 28px; }
  .section-title { font-size: 1.35rem; }
  .section-desc { font-size: .88rem; }

  /* ヒーロー */
  .hero-content { padding: 44px 16px 48px; }
  .hero-title { font-size: 1.7rem; }
  .hero-desc { font-size: .9rem; }
  .hero-catch { font-size: .8rem; }

  /* 実績バナー */
  .achievement-num { font-size: 2rem; }
  .achievement-label { font-size: .75rem; }

  /* 特徴 */
  .feature-card { padding: 22px 18px; }
  .feature-icon { width: 44px; height: 44px; }

  /* コース */
  .course-card { padding: 28px 18px; }

  /* フロー */
  .flow-step { padding: 18px 16px; gap: 12px; }
  .step-num { font-size: 1.35rem; min-width: 36px; }
  .step-content h3 { font-size: .95rem; }

  /* 合格実績 */
  .result-item { padding: 14px 8px; }
  .result-school { font-size: .82rem; }
  .result-year { font-size: .7rem; }

  /* 声 */
  .voice-card { padding: 20px 16px; }

  /* アクセス */
  .access-row dt, .access-row dd { padding: 11px 10px; font-size: .85rem; }
  .access-row dt { min-width: 68px; }
  .access-map iframe { height: 260px; }

  /* お問い合わせ */
  .contact-form { padding: 20px 16px; }
  .contact-tel { padding: 20px 16px; }
  .contact-tel-num { font-size: 1.45rem; }

  /* フッター */
  .footer { padding: 36px 0 0; }
  .footer-inner { padding-bottom: 28px; gap: 20px; }
  .footer-nav ul { gap: 6px 14px; }
  .footer-nav a { font-size: .8rem; }
  .footer-tagline { font-size: .78rem; }
}