/* ============================================
   terakoya.link — 和モダンスタイルシート v2
   ============================================ */

/* ---- カラーパレット ---- */
:root {
  --color-washi:      #f5f0e6;
  --color-washi-deep: #ebe3d1;
  --color-sumi:       #2c2826;
  --color-sumi-soft:  #4a443f;
  --color-ai:         #1c3d5a;
  --color-ai-deep:    #0f2a3f;
  --color-akane:      #b04c3c;
  --color-akane-soft: #c97268;
  --color-rikyu:      #8a9080;
  --color-kincha:     #b4853a;
  --color-white:      #fdfbf7;

  --font-mincho: 'Shippori Mincho','Noto Serif JP','Yu Mincho','YuMincho',serif;
  --font-gothic:  'Noto Sans JP','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;

  --shadow-soft:   0 2px 8px rgba(44,40,38,.08);
  --shadow-medium: 0 6px 24px rgba(44,40,38,.13);
  --shadow-lift:   0 16px 40px rgba(44,40,38,.16);

  --max-width: 1100px;
  --radius: 4px;
  --transition: 0.28s cubic-bezier(.25,.8,.25,1);
}

/* ---- リセット ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0; padding: 0;
}
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-gothic);
  color: var(--color-sumi);
  background-color: var(--color-washi);
  line-height: 1.8;
  letter-spacing: .04em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-ai); text-decoration: none; transition: color .25s; }
a:hover { color: var(--color-akane); }
::selection { background: var(--color-akane); color: var(--color-white); }

/* ---- ヘッダー ---- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(253,251,247,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-washi-deep);
  transition: box-shadow .3s;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(44,40,38,.10);
}
.header-inner {
  max-width: var(--max-width); margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
}
.site-logo {
  font-family: var(--font-mincho);
  font-size: 1.5rem; font-weight: 600;
  color: var(--color-sumi); letter-spacing: .1em;
  display: flex; align-items: baseline; gap: .4rem;
  transition: color .25s;
}
.site-logo:hover { color: var(--color-ai); }
.site-logo .logo-jp { font-size: 1.5rem; }
.site-logo .logo-en {
  font-size: .75rem; color: var(--color-rikyu);
  letter-spacing: .2em; font-family: var(--font-gothic); font-weight: 400;
}
.site-nav ul { list-style: none; display: flex; gap: 2rem; align-items: center; }
.site-nav a {
  color: var(--color-sumi-soft); font-size: .95rem;
  position: relative; padding: .5rem 0;
  font-family: var(--font-mincho); letter-spacing: .15em;
}
.site-nav a::after {
  content: '';
  position: absolute; bottom: 0; left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%; height: 1px;
  background: var(--color-akane);
  transition: transform .3s ease;
}
.site-nav a:hover::after,
.site-nav a.active::after { transform: translateX(-50%) scaleX(1); }
.site-nav a:hover, .site-nav a.active { color: var(--color-ai); }
.nav-toggle {
  display: none; background: none; border: none;
  font-size: 1.5rem; color: var(--color-sumi); cursor: pointer;
}

/* ---- ヒーロー ---- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 4rem 1.5rem 6rem;
  overflow: hidden;
  background:
    linear-gradient(160deg, rgba(245,240,230,.9) 0%, rgba(235,227,209,.6) 100%),
    var(--color-washi);
}
.hero::before {
  content: '';
  position: absolute; top: -80px; right: -80px;
  width: 420px; height: 420px;
  background: var(--color-akane); opacity: .06; border-radius: 50%; z-index: 0;
}
.hero::after {
  content: '';
  position: absolute; bottom: -100px; left: -100px;
  width: 500px; height: 500px;
  background: var(--color-ai); opacity: .05; border-radius: 50%; z-index: 0;
}
/* 和柄テクスチャ */
.hero-bg-pattern {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(rgba(44,40,38,.025) 1px, transparent 1px);
  background-size: 28px 28px;
}
.hero-content {
  position: relative; z-index: 1; max-width: 820px;
}
.hero-mark {
  display: inline-block;
  font-family: var(--font-mincho); font-size: .85rem;
  color: var(--color-akane); letter-spacing: .4em;
  margin-bottom: 1.6rem; padding: .35rem 1.6rem;
  border: 1px solid var(--color-akane); border-radius: 2px;
}
.hero-title {
  font-family: var(--font-mincho);
  font-size: clamp(2rem, 5vw, 3.6rem); font-weight: 600;
  color: var(--color-sumi); line-height: 1.35;
  margin-bottom: 1.6rem; letter-spacing: .06em;
}
.hero-title .accent {
  color: var(--color-ai);
  position: relative; display: inline-block;
}
.hero-title .accent::after {
  content: '';
  position: absolute; bottom: -4px; left: 0;
  width: 100%; height: 3px;
  background: var(--color-akane); opacity: .55;
}
.hero-subtitle {
  font-family: var(--font-mincho);
  font-size: clamp(1rem, 2vw, 1.2rem); color: var(--color-sumi-soft);
  line-height: 2.1; margin-bottom: 2.8rem; letter-spacing: .1em;
}
.hero-cta {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: 1rem 2.5rem;
  background: var(--color-ai); color: var(--color-white);
  font-family: var(--font-mincho); font-size: 1rem; letter-spacing: .2em;
  border-radius: var(--radius); cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-soft);
}
.hero-cta:hover {
  background: var(--color-akane); color: var(--color-white);
  transform: translateY(-3px); box-shadow: var(--shadow-medium);
}
.hero-cta-secondary {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: 1rem 2.5rem; margin-left: 1rem;
  background: transparent; color: var(--color-ai);
  font-family: var(--font-mincho); font-size: 1rem; letter-spacing: .2em;
  border: 1px solid var(--color-ai); border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}
.hero-cta-secondary:hover {
  background: var(--color-ai); color: var(--color-white);
}

/* サブページ用ヒーロー（小） */
.hero-sm {
  min-height: 52vh;
  padding-bottom: 3.5rem;
}
.hero-sm .hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}
.hero-sm .scroll-indicator { display: none; }

/* スクロールインジケーター */
.scroll-indicator {
  position: absolute; bottom: 28px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  z-index: 1;
}
.scroll-line {
  display: block; width: 1px; height: 48px;
  background: linear-gradient(to bottom, var(--color-akane), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: .8; transform: scaleY(1); transform-origin: top; }
  50%       { opacity: .3; transform: scaleY(0.5); transform-origin: top; }
}
.scroll-text {
  font-family: var(--font-mincho); font-size: .65rem;
  letter-spacing: .3em; color: var(--color-rikyu); text-transform: uppercase;
}

/* ---- セクション共通 ---- */
.section { padding: 7rem 1.5rem; position: relative; }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4.5rem; }
.section-label {
  display: inline-block; font-family: var(--font-mincho); font-size: .82rem;
  color: var(--color-akane); letter-spacing: .4em; margin-bottom: 1rem;
}
.section-title {
  font-family: var(--font-mincho);
  font-size: clamp(1.8rem,4vw,2.5rem); color: var(--color-sumi);
  font-weight: 500; letter-spacing: .1em; margin-bottom: 1rem;
  position: relative; display: inline-block;
}
.section-title::after {
  content: '';
  display: block; width: 40px; height: 1px;
  background: var(--color-akane); margin: 1rem auto 0;
}
.section-description {
  font-family: var(--font-mincho); color: var(--color-sumi-soft);
  max-width: 600px; margin: 0 auto; line-height: 2;
}

/* ---- 特徴カード ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
  gap: 2.5rem; margin-top: 3rem;
}
.feature-card {
  background: var(--color-white);
  padding: 3rem 2rem; border-radius: var(--radius);
  text-align: center; box-shadow: var(--shadow-soft);
  transition: transform var(--transition), box-shadow var(--transition);
  border-top: 3px solid var(--color-akane);
  position: relative; overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(176,76,60,.04));
  pointer-events: none;
}
.feature-card:nth-child(2) { border-top-color: var(--color-ai); }
.feature-card:nth-child(2)::after {
  background: linear-gradient(135deg, transparent 60%, rgba(28,61,90,.04));
}
.feature-card:nth-child(3) { border-top-color: var(--color-kincha); }
.feature-card:nth-child(3)::after {
  background: linear-gradient(135deg, transparent 60%, rgba(180,133,58,.04));
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lift);
}
.feature-icon {
  width: 72px; height: 72px; margin: 0 auto 1.6rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-washi); border-radius: 50%;
  font-family: var(--font-mincho); font-size: 1.9rem;
  color: var(--color-ai); font-weight: 600;
  box-shadow: 0 0 0 3px var(--color-washi-deep);
  transition: box-shadow var(--transition);
}
.feature-card:hover .feature-icon { box-shadow: 0 0 0 3px var(--color-akane-soft); }
.feature-card:nth-child(2) .feature-icon { color: var(--color-akane); }
.feature-card:nth-child(3) .feature-icon { color: var(--color-kincha); }
.feature-title {
  font-family: var(--font-mincho); font-size: 1.3rem;
  color: var(--color-sumi); margin-bottom: 1rem;
  letter-spacing: .1em; font-weight: 600;
}
.feature-description {
  font-size: .95rem; color: var(--color-sumi-soft);
  line-height: 1.95; text-align: left;
}

/* ---- コンセプト ---- */
.concept {
  background: var(--color-washi-deep);
  background-image:
    repeating-linear-gradient(45deg,
      transparent, transparent 20px,
      rgba(176,76,60,.025) 20px, rgba(176,76,60,.025) 21px);
}
.concept-content {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: center;
}
.concept-text h3 {
  font-family: var(--font-mincho); font-size: 1.9rem;
  color: var(--color-ai-deep); margin-bottom: 1.6rem;
  line-height: 1.6; letter-spacing: .05em;
}
.concept-text p {
  font-family: var(--font-mincho); color: var(--color-sumi-soft);
  line-height: 2.3; margin-bottom: 1.2rem; font-size: .98rem;
}
.concept-image {
  background: linear-gradient(135deg, var(--color-ai) 0%, var(--color-ai-deep) 100%);
  aspect-ratio: 4/5; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; box-shadow: var(--shadow-medium);
  transition: transform var(--transition);
}
.concept-image:hover { transform: scale(1.02); }
.concept-image::before {
  content: '学';
  font-family: var(--font-mincho);
  font-size: clamp(8rem,20vw,14rem);
  color: rgba(253,251,247,.12); font-weight: 600;
}
.concept-image::after {
  content: '出会いの先に\Aあたらしい学びを。';
  white-space: pre;
  position: absolute;
  font-family: var(--font-mincho); font-size: 1.05rem;
  color: var(--color-white); letter-spacing: .22em;
  text-align: center; line-height: 2.4; opacity: .9;
}

/* ---- プロジェクトカード ---- */
.service-list {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 2rem;
}
.service-item {
  background: var(--color-white);
  border: 1px solid rgba(44,40,38,.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column; overflow: hidden;
  position: relative;
}
.service-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
}

/* 従来の service-item（services.html用） */
.service-item:not(.project-card)::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--color-akane);
}
.service-item:not(.project-card) { padding: 2.5rem; }
.service-item:not(.project-card):hover { transform: translateX(4px) translateY(-2px); }

/* プロジェクトカード用バナー */
.project-card { padding: 0; }
.project-banner {
  height: 130px; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.project-banner::before {
  content: '';
  position: absolute; inset: 0; z-index: 1;
  background-image: repeating-linear-gradient(
    -48deg, transparent, transparent 14px,
    rgba(255,255,255,.05) 14px, rgba(255,255,255,.05) 15px
  );
}
.project-banner::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 36px; z-index: 2;
  background: linear-gradient(to bottom, transparent, rgba(0,0,0,.2));
}
.project-num {
  position: absolute; top: 13px; left: 16px; z-index: 3;
  font-family: var(--font-mincho); font-size: .75rem;
  letter-spacing: .2em; color: rgba(255,255,255,.55);
}
.project-cat {
  position: absolute; top: 11px; right: 14px; z-index: 3;
  font-family: var(--font-mincho); font-size: .72rem;
  letter-spacing: .2em; color: rgba(255,255,255,.8);
  border: 1px solid rgba(255,255,255,.4);
  padding: 3px 10px; border-radius: 999px;
}
.project-glyph {
  font-family: var(--font-mincho); font-weight: 700;
  font-size: 90px; line-height: 1;
  color: rgba(255,255,255,.12); z-index: 2;
  user-select: none; letter-spacing: -.02em;
}
.project-body {
  padding: 20px 22px 22px;
  display: flex; flex-direction: column; flex: 1;
}

.service-number {
  font-family: var(--font-mincho); font-size: .82rem;
  color: var(--color-akane); letter-spacing: .25em; margin-bottom: .9rem;
}
.service-title {
  font-family: var(--font-mincho); font-size: 1.2rem;
  color: var(--color-sumi); margin-bottom: .5rem; font-weight: 600;
  line-height: 1.35;
}
.service-url {
  font-family: var(--font-gothic); font-size: .78rem;
  color: var(--color-rikyu); letter-spacing: .04em; margin-bottom: .8rem;
}
.service-description {
  font-size: .92rem; color: var(--color-sumi-soft);
  line-height: 1.95; flex: 1; padding-bottom: 4px;
}
.service-tags-row {
  display: flex; flex-wrap: wrap; gap: .4rem;
  margin: .9rem 0 1rem;
}
.service-tag {
  font-size: .75rem; padding: .15rem .7rem; border-radius: 999px;
  background: rgba(28,61,90,.07); color: var(--color-ai-deep);
  border: 1px solid rgba(28,61,90,.2); letter-spacing: .04em;
}
.service-link {
  display: inline-flex; align-items: center; align-self: flex-start;
  padding: .6rem 1.5rem; gap: .4rem;
  background: transparent; color: var(--color-ai);
  font-family: var(--font-mincho); font-size: .88rem; letter-spacing: .15em;
  border: 1px solid var(--color-ai); border-radius: 2px;
  text-decoration: none; transition: background var(--transition), color var(--transition);
}
.service-link:hover {
  background: var(--color-ai); color: var(--color-white);
}

/* ---- CTA ---- */
.cta-section {
  background: linear-gradient(135deg, var(--color-ai-deep) 0%, var(--color-ai) 100%);
  color: var(--color-white); text-align: center;
  padding: 6rem 1.5rem; position: relative; overflow: hidden;
}
.cta-section::before {
  content: '縁';
  position: absolute; top: -30px; right: -30px;
  font-family: var(--font-mincho); font-size: 16rem;
  color: rgba(253,251,247,.05); font-weight: 600; line-height: 1;
  pointer-events: none;
}
.cta-title {
  font-family: var(--font-mincho);
  font-size: clamp(1.5rem,3.5vw,2.3rem);
  margin-bottom: 1.6rem; letter-spacing: .08em; position: relative;
}
.cta-description {
  font-family: var(--font-mincho);
  max-width: 600px; margin: 0 auto 2.8rem;
  line-height: 2; opacity: .9; position: relative; font-size: 1.05rem;
}
.cta-section .hero-cta {
  background: var(--color-akane); color: var(--color-white);
}
.cta-section .hero-cta:hover {
  background: var(--color-white); color: var(--color-akane);
}

/* ---- フッター ---- */
.site-footer {
  background: var(--color-sumi); color: var(--color-washi);
  padding: 4.5rem 1.5rem 2.5rem;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem; margin-bottom: 3rem; padding-bottom: 3rem;
  border-bottom: 1px solid rgba(245,240,230,.12);
}
.footer-brand .site-logo { color: var(--color-washi); margin-bottom: 1rem; }
.footer-brand .site-logo .logo-en { color: var(--color-rikyu); }
.footer-tagline {
  font-family: var(--font-mincho); color: rgba(245,240,230,.65);
  font-size: .9rem; line-height: 1.95; max-width: 360px;
}
.footer-heading {
  font-family: var(--font-mincho); font-size: 1rem;
  margin-bottom: 1.2rem; letter-spacing: .15em; color: var(--color-washi);
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: .6rem; }
.footer-links a {
  color: rgba(245,240,230,.65); font-size: .9rem; transition: color .25s;
}
.footer-links a:hover { color: var(--color-akane-soft); }
.footer-bottom {
  text-align: center; font-size: .82rem;
  color: rgba(245,240,230,.4); letter-spacing: .1em;
}

/* ---- お問い合わせフォーム ---- */
.contact-form {
  background: var(--color-white); padding: 3rem; border-radius: var(--radius);
  box-shadow: var(--shadow-soft); max-width: 700px; margin: 0 auto;
}
.form-group { margin-bottom: 1.5rem; }
.form-label {
  display: block; font-family: var(--font-mincho); font-size: .95rem;
  color: var(--color-sumi); margin-bottom: .5rem; letter-spacing: .1em;
}
.form-label .required { color: var(--color-akane); font-size: .8rem; margin-left: .5rem; }
.form-input, .form-textarea, .form-select {
  width: 100%; padding: .8rem 1rem;
  border: 1px solid var(--color-washi-deep); border-radius: 2px;
  font-family: var(--font-gothic); font-size: 1rem;
  background: var(--color-washi); color: var(--color-sumi);
  transition: border-color .25s, background .25s;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none; border-color: var(--color-ai); background: var(--color-white);
}
.form-textarea { resize: vertical; min-height: 150px; }
.form-submit {
  display: inline-block; padding: 1rem 3rem;
  background: var(--color-ai); color: var(--color-white);
  font-family: var(--font-mincho); font-size: 1rem;
  letter-spacing: .2em; border: none; border-radius: 2px;
  cursor: pointer; transition: background .3s;
}
.form-submit:hover { background: var(--color-akane); }

/* ---- About ページ ---- */
.about-story { display: grid; gap: 3rem; max-width: 800px; margin: 0 auto; }
.story-block {
  position: relative; padding-left: 2rem;
  border-left: 2px solid var(--color-washi-deep);
}
.story-block::before {
  content: ''; position: absolute; left: -7px; top: 2px;
  width: 12px; height: 12px;
  background: var(--color-akane); border-radius: 50%;
}
.story-block h3 {
  font-family: var(--font-mincho); font-size: 1.4rem;
  color: var(--color-ai-deep); margin-bottom: 1rem; letter-spacing: .08em;
}
.story-block p {
  font-family: var(--font-mincho); color: var(--color-sumi-soft); line-height: 2.2;
}

/* ---- スクロールリビール ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .75s ease-out, transform .75s ease-out;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- レスポンシブ ---- */
@media (max-width: 900px) {
  .service-list { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .section { padding: 4.5rem 1.5rem; }
  .nav-toggle { display: block; }
  .site-nav ul {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; background: var(--color-white);
    padding: 1.5rem; gap: 1rem; box-shadow: var(--shadow-medium);
  }
  .site-nav.open ul { display: flex; }
  .concept-content { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
  .hero-cta-secondary { margin-left: 0; margin-top: 1rem; }
  .contact-form { padding: 2rem 1.5rem; }
}
@media (max-width: 560px) {
  .service-list { grid-template-columns: 1fr; }
  .scroll-indicator { display: none; }
}

/* ---- アニメーション ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-mark     { animation: fadeInUp .6s ease-out .1s both; }
.hero-title    { animation: fadeInUp .8s ease-out .3s both; }
.hero-subtitle { animation: fadeInUp .8s ease-out .5s both; }
.hero-cta      { animation: fadeInUp .8s ease-out .65s both; }
.hero-cta-secondary { animation: fadeInUp .8s ease-out .75s both; }