/* ── Reset & Tokens ─────────────────────────────────────────── */
:root {
  --bg:      #F6F5F0;      /* warm cream */
  --white:   #FFFFFF;
  --ink:     #1C1C1A;      /* warm near-black */
  --sub:     #5C5C58;
  --muted:   #9C9C96;
  --line:    #E0DDD6;      /* warm gray line */
  --accent:  #1B3F7F;      /* deep navy */
  --accent2: #2E5FA8;
  --radius:  4px;
  --w:       min(1040px, calc(100vw - 48px));
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans JP", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.8;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }

.w { width: var(--w); margin-inline: auto; }

/* ── Reveal animation ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 245, 240, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 32px;
}

.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.875rem;
  color: var(--sub);
}
.site-nav a:hover { color: var(--ink); }

.btn-contact {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: 2px;
  background: var(--ink);
  color: var(--white);
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-contact:hover { background: var(--accent); }

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  padding: 100px 0 88px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 72px;
  align-items: start;
}

.hero-tag {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.5rem, 4.6vw, 4rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.hero-desc {
  margin-top: 28px;
  font-size: 1.02rem;
  color: var(--sub);
  line-height: 1.85;
  max-width: 32em;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.btn-primary {
  padding: 14px 28px;
  background: var(--ink);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--accent); }

.btn-ghost {
  padding: 13px 28px;
  background: transparent;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 2px;
  border: 1.5px solid var(--line);
  cursor: pointer;
  transition: border-color 0.2s;
}
.btn-ghost:hover { border-color: var(--ink); }

/* Hero — right side: 3 service summary */
.hero-services {
  padding-top: 8px;
}

.hero-services-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.hs-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 16px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.hs-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  padding-top: 3px;
}

.hs-item h3 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 6px;
  line-height: 1.4;
}

.hs-item p {
  font-size: 0.875rem;
  color: var(--sub);
  line-height: 1.7;
  margin: 0;
}

/* ── Divider ────────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--line); }

/* ── Section base ───────────────────────────────────────────── */
section { padding: 96px 0; }

.sec-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.sec-title {
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.sec-body {
  margin-top: 16px;
  color: var(--sub);
  max-width: 36em;
  font-size: 0.975rem;
}

/* ── Problem ────────────────────────────────────────────────── */
.problem {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.problem-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
  align-items: start;
}

.problem-head { max-width: 22em; }

.problem-list { display: grid; gap: 0; }

.prob-item {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.prob-item:first-child { border-top: 1px solid var(--line); }

.prob-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  padding-top: 3px;
}

.prob-item h3 {
  font-size: 0.975rem;
  font-weight: 700;
  line-height: 1.6;
}

/* ── Services ───────────────────────────────────────────────── */
.services-list { display: grid; gap: 0; margin-top: 56px; }

.svc-item {
  display: grid;
  grid-template-columns: 56px 1fr 1fr;
  gap: 32px;
  align-items: start;
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}
.svc-item:first-child { border-top: 1px solid var(--line); }

.svc-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  padding-top: 5px;
}

.svc-name {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.svc-sub {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.svc-right p {
  font-size: 0.925rem;
  color: var(--sub);
  margin: 0 0 20px;
  line-height: 1.85;
}

.svc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.svc-tag {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--sub);
}

/* ── Use Cases ──────────────────────────────────────────────── */
.usecases { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.uc-head { margin-bottom: 52px; }

.uc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-left: 1px solid var(--line);
}

.uc-item {
  padding: 36px 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.uc-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.uc-item h3 {
  font-size: 1.02rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.45;
}

.uc-item p {
  font-size: 0.875rem;
  color: var(--sub);
  line-height: 1.8;
  margin: 0;
}

/* ── CTA ────────────────────────────────────────────────────── */
.cta-sec {
  padding: 80px 0;
}

.cta-box {
  background: var(--ink);
  padding: 56px 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 14px;
}

.cta-box h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  line-height: 1.2;
  max-width: 22em;
}

.btn-cta {
  padding: 15px 32px;
  background: var(--white);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity 0.2s;
}
.btn-cta:hover { opacity: 0.85; }

/* ── Process ────────────────────────────────────────────────── */
.process-layout {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 80px;
  align-items: start;
}

.process-steps { display: grid; gap: 0; }

.proc-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.proc-item:first-child { border-top: 1px solid var(--line); }

.proc-n {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  padding-top: 4px;
}

.proc-item h3 {
  font-size: 0.975rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.proc-item p {
  font-size: 0.875rem;
  color: var(--sub);
  margin: 0;
  line-height: 1.75;
}

.process-note {
  margin-top: 12px;
  font-size: 0.825rem;
  color: var(--muted);
  line-height: 1.8;
}

/* ── About ──────────────────────────────────────────────────── */
.about {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-body p {
  margin-top: 20px;
  color: var(--sub);
  font-size: 0.95rem;
  line-height: 1.9;
}

.founder-card {
  padding: 36px;
  border: 1px solid var(--line);
  background: var(--bg);
}

.founder-role {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.founder-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.founder-card p {
  font-size: 0.9rem;
  color: var(--sub);
  line-height: 1.9;
}

/* ── Note ───────────────────────────────────────────────────── */
.note-sec { padding: 32px 0 48px; }

.note-box {
  border-left: 3px solid var(--muted);
  padding: 16px 20px;
}

.note-box p {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.8;
}

/* ── Contact ────────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-copy p {
  margin-top: 16px;
  color: var(--sub);
  font-size: 0.95rem;
  line-height: 1.85;
}

.contact-form { display: grid; gap: 16px; }

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

.contact-form label {
  display: grid;
  gap: 7px;
}

.contact-form label span {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--ink);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  background: var(--white);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  padding: 12px 14px;
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form textarea { resize: vertical; min-height: 148px; }

.form-note {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.75;
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 40px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-sub {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 5px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  font-size: 0.84rem;
  color: var(--sub);
}
.footer-nav a:hover { color: var(--ink); }

.footer-copy { font-size: 0.78rem; color: var(--muted); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero,
  .problem-layout,
  .process-layout,
  .about-layout,
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }

  .hero { padding: 72px 0 64px; }

  .svc-item { grid-template-columns: 40px 1fr; }
  .svc-right { grid-column: 2; }

  .uc-grid { grid-template-columns: 1fr 1fr; }

  .cta-box { flex-direction: column; align-items: flex-start; padding: 44px 40px; }
}

@media (max-width: 680px) {
  :root { --w: min(100vw - 32px, 1040px); }

  .site-nav { display: none; }

  .hero h1 { font-size: clamp(2.1rem, 9vw, 2.7rem); }

  section { padding: 64px 0; }

  .svc-item { grid-template-columns: 1fr; gap: 16px; }

  .uc-grid { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }

  .cta-box { padding: 36px 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ── Free consultation note ─────────────────────────────── */
.hero-free-note {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}
.hero-free-note::before {
  content: "✓ ";
  color: var(--accent);
  font-weight: 700;
}

.free-badge {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  border-radius: 2px;
  padding: 3px 10px;
  margin-top: 14px;
  letter-spacing: 0.04em;
}

/* ── Portfolio page ─────────────────────────────────────── */
.pf-hero { padding: 80px 0 72px; }

.pf-hero-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 64px;
  align-items: start;
}

.pf-photo {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--line);
  display: block;
}

.pf-hero-body h1 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.pf-affils {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.pf-affils p {
  font-size: 0.875rem;
  color: var(--sub);
  line-height: 1.6;
}
.pf-affil-role {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}

.pf-intro {
  font-size: 0.975rem;
  color: var(--sub);
  line-height: 1.9;
  max-width: 34em;
}

/* Vision */
.pf-vision {
  background: var(--ink);
  padding: 88px 0;
}
.pf-vision .sec-label { color: rgba(255,255,255,0.35); margin-bottom: 28px; }

.pf-vision-quote {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--white);
  margin: 0 0 28px;
  border: none;
  padding: 0;
}

.pf-vision-body {
  font-size: 0.975rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.95;
  max-width: 36em;
}

/* Skills */
.pf-skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin-top: 52px;
  border-left: 1px solid var(--line);
}

.pf-skill-card {
  padding: 36px 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.pf-skill-card h3 {
  font-size: 0.975rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.pf-skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pf-skill-tag {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--sub);
}

/* Works */
.pf-subsec-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 24px 0 16px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}

.pf-work-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.pf-work-date {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--muted);
  padding-top: 2px;
  line-height: 1.6;
}
.pf-work-title {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}
.pf-work-desc {
  font-size: 0.875rem;
  color: var(--sub);
  line-height: 1.8;
  margin: 0;
}
.pf-work-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  padding: 2px 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--muted);
  margin-top: 6px;
}

.pf-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--sub);
  padding: 10px 0;
}
.pf-back-btn:hover { color: var(--ink); }

/* Portfolio link in About section */
.pf-link-btn {
  display: inline-block;
  margin-top: 20px;
  padding: 11px 22px;
  border: 1.5px solid var(--line);
  border-radius: 2px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink);
  transition: border-color 0.2s;
}
.pf-link-btn:hover { border-color: var(--ink); }

/* Responsive portfolio */
@media (max-width: 960px) {
  .pf-hero-layout { grid-template-columns: 200px 1fr; gap: 40px; }
  .pf-skills-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .pf-hero-layout { grid-template-columns: 1fr; }
  .pf-photo { max-width: 220px; aspect-ratio: 1; }
  .pf-work-item { grid-template-columns: 1fr; gap: 4px; }
  .pf-work-date { padding-top: 0; }
}