:root {
  --ink: #0a0a0f;
  --paper: #f5f2ec;
  --accent: #e84b2a;
  --accent2: #2a6ee8;
  --muted: #8a8580;
  --card-bg: #ffffff;
  --border: #d8d4cc;
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --font-mono: 'Space Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ── NOISE TEXTURE OVERLAY ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 3rem;
  backdrop-filter: blur(12px);
  background: rgba(245,242,236,0.85);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 2.4rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 0.6rem 1.4rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--accent); transform: translateY(-1px); }

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding-top: 80px;
  position: relative;
  overflow: visible;
}

.hero-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 5rem 3rem 5rem 5rem;
  position: relative;
  z-index: 2;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.hero-tag::before {
  content: '';
  display: inline-block;
  width: 24px; height: 1px;
  background: var(--accent);
}

.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(4rem, 7vw, 7.5rem);
  line-height: 0.92;
  letter-spacing: 0.02em;
  margin-bottom: 2rem;
}
.hero-h1 .line-accent { color: var(--accent); }
.hero-h1 .line-outline {
  -webkit-text-stroke: 2px var(--ink);
  color: transparent;
}

.hero-sub {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 42ch;
  margin-bottom: 3rem;
  font-weight: 300;
}

.hero-btns {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.btn-primary {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  padding: 0.9rem 2.2rem;
  text-decoration: none;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  transition: transform 0.3s;
  z-index: -1;
}
.btn-primary:hover::after { transform: translateX(0); }
.btn-primary:hover { transform: translateY(-2px); }

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); }

.hero-right {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
}

.hero-visual {
  position: relative;
  width: 100%;
  height: 100%;
}

/* Floating abstract shapes */
.shape {
  position: absolute;
  border-radius: 50%;
}
.shape-1 {
  width: 420px; height: 420px;
  background: radial-gradient(circle at 40% 40%, #e84b2a18, transparent 70%);
  border: 1px solid #e84b2a22;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  animation: popIn1 1s cubic-bezier(0.34,1.56,0.64,1) 0.2s forwards, pulse 7s ease-in-out 1.2s infinite;
}
.shape-2 {
  width: 260px; height: 260px;
  background: radial-gradient(circle, #2a6ee818, transparent 70%);
  border: 1px solid #2a6ee822;
  top: 22%; left: 58%;
  transform: scale(0);
  opacity: 0;
  animation: popIn 1s cubic-bezier(0.34,1.56,0.64,1) 0.5s forwards, float 9s ease-in-out 1.5s infinite;
}
.shape-4 {
  width: 130px; height: 130px;
  background: radial-gradient(circle, #e84b2a14, transparent 70%);
  border: 1px solid #e84b2a18;
  border-radius: 50%;
  position: absolute;
  top: 65%; left: 62%;
  transform: scale(0);
  opacity: 0;
  animation: popIn 1s cubic-bezier(0.34,1.56,0.64,1) 0.8s forwards, float 6s ease-in-out 1.8s infinite reverse;
}

.hero-keywords {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  width: 260px;
  z-index: 2;
}
.hero-kw {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  opacity: 0;
  transform: translateY(14px);
  animation: kwIn 0.6s cubic-bezier(0.22,1,0.36,1) both;
}
.hero-kw:nth-child(1) { animation-delay: 0.9s; }
.hero-kw:nth-child(2) { animation-delay: 1.3s; }
.hero-kw:nth-child(3) { animation-delay: 1.7s; }
.hero-kw:nth-child(4) { animation-delay: 2.1s; }
.hero-kw-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.hero-kw-dot.red  { background: var(--accent); }
.hero-kw-dot.blue { background: var(--accent2); }
.hero-kw-dot.outline { background: transparent; border: 1.5px solid var(--muted); }
.hero-kw-line {
  flex: 1; height: 1px;
  background: var(--border);
  transform: scaleX(0);
  transform-origin: left;
  animation: lineIn 0.5s ease both;
}
.hero-kw:nth-child(1) .hero-kw-line { animation-delay: 1.2s; }
.hero-kw:nth-child(2) .hero-kw-line { animation-delay: 1.6s; }
.hero-kw:nth-child(3) .hero-kw-line { animation-delay: 2.0s; }
.hero-kw:nth-child(4) .hero-kw-line { animation-delay: 2.4s; }
.hero-kw-text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
}
.hero-kw-text em { font-style: normal; color: var(--accent); }
.hero-kw-text.blue em { color: var(--accent2); }
@keyframes kwIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes lineIn {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes popIn1 {
  from { transform: translate(-50%,-50%) scale(0); opacity: 0; }
  to   { transform: translate(-50%,-50%) scale(1); opacity: 1; }
}
@keyframes popIn {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
@keyframes pulse {
  0%,100% { transform: translate(-50%,-50%) scale(1); }
  50% { transform: translate(-50%,-50%) scale(1.06); }
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── TICKER ── */
.ticker {
  background: var(--ink);
  color: var(--paper);
  padding: 0.7rem 0;
  overflow: hidden;
  white-space: nowrap;
}
.ticker-inner {
  display: inline-block;
  animation: ticker 24s linear infinite;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.ticker-inner span { color: var(--accent); margin: 0 1rem; }
@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ── SECTION COMMON ── */
section { padding: 8rem 5rem; }
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-h2 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 5rem);
  line-height: 1;
  margin-bottom: 1.5rem;
}
.section-lead {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--muted);
  max-width: 56ch;
  font-weight: 300;
}

/* ── SERVICES ── */
#services { background: var(--ink); color: var(--paper); }
#services .section-tag { color: var(--accent); }
#services .section-lead { color: #888; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 4rem;
  background: #222;
}

.service-card {
  background: var(--ink);
  padding: 2.5rem;
  cursor: default;
  transition: background 0.3s;
  position: relative;
  overflow: hidden;
}
.service-card:hover { background: #111; }
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  font-size: 2rem;
  margin-bottom: 1.2rem;
  display: block;
}
.service-num {
  font-family: var(--font-display);
  font-size: 4rem;
  color: #1a1a1f;
  position: absolute;
  bottom: 1rem; right: 1.5rem;
  line-height: 1;
  transition: color 0.3s;
}
.service-card:hover .service-num { color: #222; }

.service-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  margin-bottom: 0.8rem;
  color: var(--paper);
}
.service-desc {
  font-size: 0.82rem;
  line-height: 1.8;
  color: #aaa;
  font-weight: 300;
}

/* AI badge */
.ai-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent);
  color: white;
  padding: 0.15rem 0.5rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

/* ── AI LEARNING SECTION ── */
#ailearning {
  background: linear-gradient(135deg, #0a0a0f 0%, #0d1520 100%);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
#ailearning::before {
  content: 'AI';
  font-family: var(--font-display);
  font-size: 30vw;
  color: rgba(42,110,232,0.04);
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.ailearning-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.ailearning-content .section-tag { color: var(--accent); }
.ailearning-content .section-h2 { color: var(--paper); }
.ailearning-content .section-lead { color: #666; }

.ai-features {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin-top: 2.5rem;
}

.ai-feature {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid #1a2030;
  transition: all 0.2s;
}
.ai-feature:hover { padding-left: 0.5rem; border-color: var(--accent); }

.ai-feature-icon {
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid rgba(232,75,42,0.4);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}
.ai-feature-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper);
  margin-bottom: 0.3rem;
}
.ai-feature-desc {
  font-size: 0.8rem;
  color: #999;
  line-height: 1.7;
  font-weight: 300;
}

.ailearning-visual {
  position: relative;
}

.terminal {
  background: #080c14;
  border: 1px solid #1a2535;
  padding: 0;
  font-family: var(--font-mono);
  border-radius: 4px;
  overflow: hidden;
}
.terminal-bar {
  background: #111824;
  padding: 0.7rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid #1a2535;
}
.terminal-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.td-red { background: #e84b2a; }
.td-yellow { background: #e8c02a; }
.td-green { background: #2ae87a; }
.terminal-title {
  font-size: 0.65rem;
  color: #444;
  letter-spacing: 0.1em;
  margin-left: 0.5rem;
}
.terminal-body {
  padding: 1.5rem;
  font-size: 0.78rem;
  line-height: 2;
}
.t-prompt { color: var(--accent2); }
.t-cmd { color: #ddd; }
.t-out { color: #555; }
.t-success { color: #2ae87a; }
.t-cursor {
  display: inline-block;
  width: 8px; height: 14px;
  background: var(--accent2);
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── CATOSTREMOFF SECTION ── */
#catostremoff {
  background: #f9f6f0;
  position: relative;
  overflow: hidden;
}
#catostremoff::after {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, #e84b2a08, transparent 70%);
  pointer-events: none;
}

.catostrem-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 6rem;
  align-items: center;
}

.catostrem-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.cat-card {
  border: 1px solid var(--border);
  padding: 1.8rem 1.5rem;
  background: white;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.cat-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.cat-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
.cat-card:hover::after { transform: scaleX(1); }

.cat-card-icon { font-size: 1.8rem; margin-bottom: 0.8rem; }
.cat-card-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.cat-card-desc {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.7;
  font-weight: 300;
}

/* ── PHILOSOPHY ── */
#philosophy {
  background: var(--paper);
  position: relative;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 4rem;
  border: 1px solid var(--border);
}

.phil-item {
  padding: 3rem 2.5rem;
  border-right: 1px solid var(--border);
  position: relative;
  transition: background 0.3s;
}
.phil-item:last-child { border-right: none; }
.phil-item:hover { background: white; }

.phil-num {
  font-family: var(--font-display);
  font-size: 5rem;
  color: #eee;
  line-height: 1;
  margin-bottom: 1.5rem;
  transition: color 0.3s;
}
.phil-item:hover .phil-num { color: var(--accent); }

.phil-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 0.8rem;
}
.phil-desc {
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--muted);
  font-weight: 300;
}

/* ── PROJECTS ── */
#projects {
  background: #faf8f4;
  overflow: hidden;
}

.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: white;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s;
  cursor: pointer;
}
.project-card:hover { transform: translateY(-6px); box-shadow: 0 20px 60px rgba(0,0,0,0.1); }

.project-thumb {
  aspect-ratio: 16/9;
  background: var(--ink);
  position: relative;
  overflow: hidden;
}
.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.project-card:hover .project-thumb img {
  transform: scale(1.05);
}
.project-cat-label {
  position: absolute;
  top: 0.8rem; left: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  background: var(--accent);
  color: white;
  padding: 0.2rem 0.5rem;
}

.project-body { padding: 1.5rem; }
.project-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 0.5rem;
}
.project-desc {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.7;
  font-weight: 300;
}

/* ── CTA ── */
#cta {
  background: #f5f0eb;
  color: var(--ink);
  text-align: center;
  padding: 10rem 5rem;
  position: relative;
  overflow: hidden;
}
#cta::before {
  content: 'CONTACT';
  font-family: var(--font-display);
  font-size: 22vw;
  color: rgba(10,10,15,0.04);
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  pointer-events: none;
}

#cta .section-tag { color: var(--accent); }
#cta .section-h2 { color: var(--ink); max-width: 15ch; margin: 0 auto 2rem; }
#cta .section-lead { color: var(--muted); margin: 0 auto 3rem; text-align: center; }

.cta-btns {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
}

.btn-large {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-large-fill {
  background: var(--accent);
  color: white;
}
.btn-large-fill:hover { background: #d13a1a; transform: translateY(-2px); }
.btn-large-outline {
  background: transparent;
  color: var(--paper);
  border: 1px solid #333;
}
.btn-large-outline:hover { border-color: #666; transform: translateY(-2px); }

/* ── CONTACT FORM ── */
.contact-form {
  max-width: 560px;
  margin: 3rem auto 0;
  text-align: left;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.85rem 1rem;
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
.form-input::placeholder { color: #bbb; }
.form-input:focus { border-color: var(--accent); }

.form-textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.7;
}

.btn-submit {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.95rem 2.4rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  margin-top: 0.5rem;
}
.btn-submit:hover:not(:disabled) { background: #d13a1a; transform: translateY(-2px); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.form-status {
  margin-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  min-height: 1.2em;
}
.form-status.success { color: #2ae87a; }
.form-status.error   { color: var(--accent); }

/* ── FOOTER ── */
footer {
  background: #050508;
  color: #888;
  padding: 3rem 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #111;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: #aaa;
  letter-spacing: 0.05em;
}
.footer-logo span { color: var(--accent); }
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
}
.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #888;
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

/* ── SCROLL REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  #hero { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  section { padding: 5rem 1.5rem; }
  .ailearning-inner, .catostrem-inner { grid-template-columns: 1fr; gap: 3rem; }
  .services-grid, .philosophy-grid, .projects-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: 1.5rem; text-align: center; }
}

#hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── HERO BUBBLES ── */
.hero-bubble-wrap {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.bubble {
  position: absolute;
  width: 210px; height: 210px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.3rem;
  transform: scale(0);
  opacity: 0;
}
.bubble-1 {
  background: radial-gradient(circle at 35% 35%, rgba(232,75,42,0.14), rgba(232,75,42,0.04));
  border: 1px solid rgba(232,75,42,0.3);
  top: calc(50% - 260px); left: -30px;
  transform: scale(0.3);
  animation: bubbleIn 1.5s ease-out 2.5s forwards, floatA 8s ease-in-out 4.0s infinite;
}
.bubble-2 {
  background: radial-gradient(circle at 35% 35%, rgba(42,110,232,0.14), rgba(42,110,232,0.04));
  border: 1px solid rgba(42,110,232,0.3);
  top: calc(50% + 80px); right: -30px;
  transform: scale(0.3);
  animation: bubbleIn 1.5s ease-out 2.8s forwards, floatB 10s ease-in-out 4.3s infinite;
}
.bubble-3 {
  background: radial-gradient(circle at 35% 35%, rgba(232,75,42,0.12), rgba(232,75,42,0.03));
  border: 1px solid rgba(232,75,42,0.25);
  top: calc(50% - 200px); right: 5%;
  transform: scale(0.3);
  animation: bubbleIn 1.5s ease-out 3.1s forwards, floatC 9s ease-in-out 4.6s infinite;
}
.bubble-4 {
  background: radial-gradient(circle at 35% 35%, rgba(42,110,232,0.12), rgba(42,110,232,0.03));
  border: 1px solid rgba(42,110,232,0.25);
  top: calc(50% + 60px); left: 5%;
  transform: scale(0.3);
  animation: bubbleIn 1.5s ease-out 3.4s forwards, floatD 7s ease-in-out 4.9s infinite;
}
.bubble-label {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.06em;
  line-height: 1;
}
.bubble-1 .bubble-label, .bubble-3 .bubble-label { color: var(--accent); }
.bubble-2 .bubble-label, .bubble-4 .bubble-label { color: var(--accent2); }
.bubble-sub {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

@keyframes bubbleIn {
  0%   { transform: scale(0.3); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes floatA {
  0%,100% { transform: translate(0,0); }
  40%     { transform: translate(6px,-14px); }
  70%     { transform: translate(-4px,-8px); }
}
@keyframes floatB {
  0%,100% { transform: translate(0,0); }
  35%     { transform: translate(-8px,-16px); }
  65%     { transform: translate(4px,-6px); }
}
@keyframes floatC {
  0%,100% { transform: translate(0,0); }
  30%     { transform: translate(10px,-10px); }
  60%     { transform: translate(-6px,-18px); }
}
@keyframes floatD {
  0%,100% { transform: translate(0,0); }
  45%     { transform: translate(-10px,-12px); }
  75%     { transform: translate(6px,-6px); }
}

/* ── HERO RIPPLE フェーズ1: 中心の同心円 ── */
.hero-ripple-wrap {
  position: absolute;
  top: 50%; left: 50%;
  pointer-events: none;
  z-index: 1;
  animation: rippleWrapFade 0.8s ease-out 2.5s forwards;
}
.hero-ripple {
  position: absolute;
  width: 120px; height: 120px;
  border-radius: 50%;
  border: 1.5px solid rgba(232,75,42,0.5);
  background: transparent;
  transform: translate(-50%, -50%) scale(1);
  animation: heroRipple 3.2s ease-out infinite;
}
.hero-ripple:nth-child(1) { animation-delay: 0s; }
.hero-ripple:nth-child(2) { animation-delay: 0.8s; }
.hero-ripple:nth-child(3) { animation-delay: 1.6s; }
.hero-ripple:nth-child(4) { animation-delay: 2.4s; }

@keyframes heroRipple {
  0%   { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
  100% { transform: translate(-50%, -50%) scale(3.5); opacity: 0; }
}
@keyframes rippleWrapFade {
  0%   { opacity: 1; }
  100% { opacity: 0; pointer-events: none; }
}

/* ── HERO RIPPLE フェーズ4: 背景の小さい波紋 ── */
.hero-bg-ripple {
  position: absolute;
  border-radius: 50%;
  background: transparent;
  pointer-events: none;
  z-index: 0;
  animation: bgRippleOut 3.5s ease-out forwards;
}
@keyframes bgRippleOut {
  0%   { transform: translate(-50%, -50%) scale(1); opacity: 0.35; }
  100% { transform: translate(-50%, -50%) scale(3); opacity: 0; }
}