/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary:    #ffffff;
  --bg-secondary:  #f8fafc;
  --bg-card:       #ffffff;
  --accent:        #3880FF;
  --accent-dark:   #2563EB;
  --accent-purple: #60a5fa;
  --accent-gradient: linear-gradient(135deg, #3880FF, #60a5fa);
  --text-primary:   #0f172a;
  --text-secondary: #64748b;
  --text-muted:     #94a3b8;
  --border:         #e2e8f0;
  --border-hover:   rgba(56,128,255,0.4);
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:      0 10px 40px rgba(0,0,0,0.10);
  --shadow-accent:  0 8px 28px rgba(56,128,255,0.28);
  --radius:    16px;
  --radius-sm: 10px;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-wipe:   cubic-bezier(0.77, 0, 0.18, 1);
  --font: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; }

/* ===== LAYOUT ===== */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ===== GRADIENT TEXT ===== */
.highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== SECTION LABELS ===== */
.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.8rem);
  margin-bottom: 52px;
  line-height: 1.3;
  color: var(--text-primary);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font);
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s ease;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
}
.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: var(--shadow-accent);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid rgba(56,128,255,0.5);
}
.btn-outline:hover {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-full { width: 100%; }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(38px);
  transition: opacity 0.6s ease, transform 0.6s var(--ease-spring);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }

/* ===== HEADER ===== */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  padding: 20px 0;
  transition: all 0.4s var(--ease-smooth);
}
.header.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { font-size: 1.35rem; font-weight: 900; letter-spacing: -0.03em; color: var(--text-primary); }
.nav-logo span { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav-menu { display: flex; list-style: none; gap: 36px; }
.nav-menu a { font-size: 0.88rem; font-weight: 500; color: var(--text-secondary); transition: color 0.3s ease; }
.nav-menu a:hover { color: var(--accent); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 8px; z-index: 201; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all 0.3s var(--ease-spring); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== HERO ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 680px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(150deg, #eef2ff 0%, #fafbff 55%, #f5f3ff 100%);
}

#threeCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.65;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 820px;
  padding: 0 24px;
}

/* Badge */
.hero-badge {
  display: inline-block;
  background: rgba(56,128,255,0.08);
  border: 1px solid rgba(56,128,255,0.22);
  color: var(--accent);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s var(--ease-spring);
}
.hero-badge.visible { opacity: 1; transform: translateY(0); }

/* ===== HERO TITLE — Squash & Stretch bounce (yui540 OSS style) ===== */
.hero-title {
  font-size: clamp(3rem, 7.5vw, 6rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  letter-spacing: -0.03em;
}

.hero-title-line {
  display: block;
  /* overflow visible — chars fly in from above */
}

.hero-title-line-inner {
  display: block;
  transform-origin: center bottom;   /* squash/stretch anchors at baseline */
  animation: lineDrop 0.38s linear both;
  animation-play-state: paused;
}

/*
  lineDrop — 上から落下 → 着地でごく控えめなSquash → 2回バウンドして静止
  transform-origin: bottom なので着地点(ベースライン)が固定される
*/
@keyframes lineDrop {
  0% {
    opacity: 0;
    transform: translateY(-52px);
  }
  /* 着地 — 軽いSquash */
  52% {
    opacity: 1;
    transform: translateY(0) scaleY(0.88) scaleX(1.07);
  }
  /* 1回目バウンド */
  66% {
    transform: translateY(-11px) scaleY(1.04) scaleX(0.98);
  }
  /* 2回目着地 */
  77% {
    transform: translateY(0) scaleY(0.94) scaleX(1.03);
  }
  /* 2回目バウンド */
  86% {
    transform: translateY(-4px) scaleY(1.01) scaleX(0.99);
  }
  /* 静止 */
  93% {
    transform: translateY(0) scaleY(0.99) scaleX(1.00);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scaleY(1) scaleX(1);
  }
}

/* Desc */
.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 40px;
  line-height: 1.85;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.22s ease, transform 0.22s var(--ease-spring);
}
.hero-desc.visible { opacity: 1; transform: translateY(0); }

/* CTA */
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.22s ease 0.08s, transform 0.22s var(--ease-spring) 0.08s;
}
.hero-cta.visible { opacity: 1; transform: translateY(0); }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: scrollBounce 2.2s ease-in-out infinite;
}
.scroll-line {
  width: 1px;
  height: 44px;
  background: linear-gradient(to bottom, transparent, var(--accent));
}
.scroll-indicator span { font-size: 0.6rem; letter-spacing: 0.25em; color: var(--text-muted); text-transform: uppercase; }

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
  50%       { transform: translateX(-50%) translateY(10px); opacity: 1; }
}

/* ===== CONCEPT ===== */
.concept { padding: 130px 0; background: var(--bg-primary); }

.concept-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }

.concept-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 30px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s ease, transform 0.4s var(--ease-spring), box-shadow 0.3s ease;
}
.concept-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.concept-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.concept-icon svg { width: 26px; height: 26px; }
.concept-item:nth-child(1) .concept-icon { background: rgba(14,165,233,0.12); color: #0ea5e9; }
.concept-item:nth-child(2) .concept-icon { background: rgba(249,115,22,0.12); color: #f97316; }
.concept-item:nth-child(3) .concept-icon { background: rgba(56,128,255,0.12); color: var(--accent); }
.concept-item h3 { font-size: 1.05rem; margin-bottom: 10px; color: var(--text-primary); }
.concept-item p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.75; }

/* ===== SERVICES ===== */
.services { padding: 130px 0; background: var(--bg-secondary); }

.services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }

a.service-card { display: block; }

.service-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 30px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s ease, transform 0.4s var(--ease-spring), box-shadow 0.3s ease;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.service-card:hover::before { opacity: 1; }
.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.service-number { font-size: 0.78rem; font-weight: 700; color: var(--text-muted); letter-spacing: 0.1em; margin-bottom: 14px; }
.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card:nth-child(1) .service-icon { background: rgba(56,128,255,0.10); color: var(--accent); }
.service-card:nth-child(2) .service-icon { background: rgba(139,92,246,0.10); color: #8b5cf6; }
.service-card:nth-child(3) .service-icon { background: rgba(6,182,212,0.10); color: #06b6d4; }
.service-card h3 { font-size: 1.05rem; margin-bottom: 10px; color: var(--text-primary); }
.service-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 20px; }

.service-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.73rem;
  font-weight: 700;
  background: rgba(56,128,255,0.1);
  color: var(--accent);
  border: 1px solid rgba(56,128,255,0.25);
}
.service-tag.soon {
  background: rgba(148,163,184,0.1);
  color: var(--text-muted);
  border-color: var(--border);
}

/* ===== BLOG PREVIEW ===== */
.blog-preview { padding: 130px 0; background: var(--bg-primary); }
.blog-grid { display: grid; gap: 22px; margin-bottom: 48px; }

.blog-card {
  display: grid;
  grid-template-columns: 260px 1fr;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s ease, transform 0.4s var(--ease-spring), box-shadow 0.3s ease;
}
.blog-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.blog-card-image {
  background: linear-gradient(135deg, rgba(56,128,255,0.08), rgba(96,165,250,0.14));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
}
.blog-card-image-placeholder {
  font-size: 1.1rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.05em;
}
.blog-card-content { padding: 30px 32px; display: flex; flex-direction: column; }

.blog-tag {
  display: inline-block;
  background: rgba(96,165,250,0.1);
  color: var(--accent-purple);
  font-size: 0.73rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 50px;
  margin-bottom: 14px;
  width: fit-content;
}

.blog-card-content h3 { font-size: 1.1rem; margin-bottom: 10px; line-height: 1.5; flex: 1; color: var(--text-primary); }
.blog-card-content h3 a { color: inherit; transition: color 0.3s ease; }
.blog-card-content h3 a:hover { color: var(--accent); }
.blog-card-content p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 22px; }

.blog-meta { display: flex; align-items: center; justify-content: space-between; }
.blog-meta span { font-size: 0.78rem; color: var(--text-muted); }
.read-more { font-size: 0.83rem; font-weight: 700; color: var(--accent); transition: letter-spacing 0.3s ease; }
.read-more:hover { letter-spacing: 0.04em; }

.blog-preview-footer { text-align: center; }

/* ===== CONTACT ===== */
.contact { padding: 130px 0; background: var(--bg-secondary); }
.contact-desc { color: var(--text-secondary); margin-bottom: 48px; max-width: 560px; }
.contact-form { max-width: 580px; }

.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 8px; letter-spacing: 0.02em; }
.required { color: #ef4444; }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-primary);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--text-primary);
  font-size: 0.92rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56,128,255,0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group select option { background: var(--bg-primary); color: var(--text-primary); }
.form-group textarea { resize: vertical; min-height: 130px; }

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 64px 0 40px;
  text-align: center;
}
.footer-logo { font-size: 1.55rem; font-weight: 900; letter-spacing: -0.03em; margin-bottom: 6px; color: var(--text-primary); }
.footer-logo span { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-tagline { font-size: 0.87rem; color: var(--text-muted); margin-bottom: 30px; }
.footer-nav { display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; margin-bottom: 28px; }
.footer-nav a { font-size: 0.83rem; color: var(--text-secondary); transition: color 0.3s ease; }
.footer-nav a:hover { color: var(--accent); }
.footer-copy { font-size: 0.78rem; color: var(--text-muted); }

/* ===== MOBILE NAV (white overlay) ===== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(10px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 36px;
    z-index: 200;
  }
  .nav-menu.active { display: flex; }
  .nav-menu a { font-size: 1.25rem; color: var(--text-primary) !important; }
  .nav-toggle { display: flex; }

  .concept-grid, .services-grid { grid-template-columns: 1fr; }
  .blog-card { grid-template-columns: 1fr; }
  .blog-card-image { min-height: 150px; }
  .hero-cta { flex-direction: column; align-items: center; }
}