/* ===================================================
   Imuraa — AI Consulting & DX Support Portfolio
   Modern, warm, sales-oriented design
   =================================================== */

:root {
  --font-base: "Manrope", "Noto Sans JP", sans-serif;
  --color-text: #191919;
  --color-muted: #5a5a5a;
  --color-border: #e5e5e5;
  --color-surface: #ffffff;
  --color-soft: #f7f8fa;
  --color-dark: #111111;
  --color-accent: #0a66c2;
  --color-accent-soft: rgba(10, 102, 194, 0.08);
  --color-highlight: #ffe066;
  --shadow-card: 0 8px 32px rgba(17, 17, 17, 0.06);
  --shadow-hover: 0 16px 48px rgba(17, 17, 17, 0.12);
  --max-width: 1100px;
  --radius: 20px;
  --radius-sm: 12px;
}

/* ---------- Utility ---------- */
.container {
  width: min(var(--max-width), calc(100% - 3.5rem));
  margin-inline: auto;
}

.pc-only { display: inline; }
.sp-only { display: none; }
.required { color: #b42318; font-size: 0.75rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding-block: 1rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.36em;
  font-size: 0.98rem;
  text-transform: uppercase;
}

.header-nav {
  display: flex;
  gap: 2rem;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.header-nav a {
  position: relative;
  padding-bottom: 0.2rem;
}

.header-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.25s ease;
}

.header-nav a:hover::after,
.header-nav a:focus-visible::after {
  width: 100%;
}

.header-nav a:hover,
.header-nav a:focus-visible {
  color: var(--color-accent);
}

.header-cta {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.6rem 1.4rem;
  border-radius: 100px;
  background-color: var(--color-accent);
  color: #ffffff !important;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.header-cta:hover,
.header-cta:focus-visible {
  background-color: #084d93;
  color: #ffffff !important;
  transform: translateY(-1px);
}

/* ---------- Hamburger ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile Menu ---------- */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem 2rem 2rem;
  border-top: 1px solid var(--color-border);
  background-color: rgba(255, 255, 255, 0.98);
}

.mobile-menu.is-open {
  display: flex;
}

.mobile-menu__links {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mobile-menu__links a {
  display: block;
  padding: 0.9rem 0;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--color-border);
  transition: color 0.2s ease;
}

.mobile-menu__links a:last-child {
  border-bottom: none;
}

.mobile-menu__links a:hover,
.mobile-menu__links a:focus-visible {
  color: var(--color-accent);
}

.mobile-menu__social {
  display: flex;
  gap: 1rem;
  padding-top: 0.5rem;
}

.mobile-menu__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.mobile-menu__social a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.mobile-menu__social a:hover img {
  filter: brightness(0) invert(1);
}

.mobile-menu__social img {
  width: 18px;
  height: 18px;
}

/* ---------- Buttons ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.95rem 2rem;
  border-radius: 100px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.04em;
}

.button--primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.button--primary:hover,
.button--primary:focus-visible {
  background-color: #084d93;
  border-color: #084d93;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(10, 102, 194, 0.3);
}

.button--outline {
  background-color: transparent;
  border-color: var(--color-dark);
  color: var(--color-dark);
}

.button--outline:hover,
.button--outline:focus-visible {
  background-color: var(--color-dark);
  color: #ffffff;
  transform: translateY(-2px);
}

.button--full { width: 100%; }
.button.is-loading { opacity: 0.7; pointer-events: none; }

.button-micro {
  font-size: 0.72rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 0.3rem;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(5rem, 14vw, 9rem) clamp(4rem, 10vw, 7rem);
  background: linear-gradient(170deg, #f0f4f8 0%, var(--color-surface) 60%);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -10%;
  top: -20%;
  width: 50%;
  height: 140%;
  background: radial-gradient(ellipse, rgba(10, 102, 194, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.6rem;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(1.6rem, 4.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.hero-highlight {
  font-style: normal;
  font-size: 1.15em;
  font-weight: 800;
  color: var(--color-accent);
  position: relative;
  display: inline-block;
  padding: 0 0.08em;
}

.hero-highlight::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0.1em;
  width: 100%;
  height: 0.3em;
  background-color: var(--color-highlight);
  opacity: 0.5;
  z-index: -1;
  border-radius: 2px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.hero-tags span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  letter-spacing: 0.02em;
  transition: all 0.2s ease;
}

.hero-tags span:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

.hero-sub {
  font-size: clamp(0.88rem, 1.4vw, 1rem);
  color: var(--color-muted);
  line-height: 1.85;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

/* ---------- Numbers ---------- */
.numbers {
  padding-block: clamp(3rem, 8vw, 5rem);
  background: linear-gradient(135deg, #0f1923 0%, #1a2d42 100%);
  border-top: none;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
  color: #ffffff;
}

.number-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  align-items: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.number-value {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #ffffff 20%, #94b8d8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.number-unit {
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.6;
  margin-top: -0.15rem;
}

.number-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  opacity: 0.5;
  margin-top: 0.3rem;
}

/* ---------- Section Common ---------- */
.section {
  padding-block: clamp(5rem, 12vw, 8rem);
  border-top: none;
  position: relative;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 3.5rem;
}

.section-heading[data-align="center"] {
  align-items: center;
  text-align: center;
}

.section-heading[data-align="start"] {
  align-items: flex-start;
}

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-desc {
  font-size: 0.92rem;
  color: var(--color-muted);
  line-height: 1.85;
  max-width: 560px;
}

/* ---------- Services ---------- */
.services {
  background-color: var(--color-soft);
}

.service-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
}

.service-card {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  padding: 2.5rem 2rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  text-align: center;
  align-items: center;
  position: relative;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.service-card--featured {
  border-color: var(--color-accent);
  border-width: 2px;
}

.service-card--featured::before {
  content: "おすすめ";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 0.3rem 1rem;
  background-color: var(--color-accent);
  color: #fff;
  border-radius: 100px;
}

.service-badge {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  padding: 0.35rem 1rem;
  border-radius: 100px;
}

.service-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, rgba(10, 102, 194, 0.15) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.service-icon-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.service-card h3 {
  font-size: 1rem;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.service-price {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-accent);
}

.service-price span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-muted);
}

.service-features {
  text-align: left;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  padding: 1rem 0;
  margin: 0;
  list-style: none;
  border-top: 1px solid var(--color-border);
}

.service-features li {
  padding-left: 1.4rem;
  position: relative;
  line-height: 1.6;
}

.service-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.service-note {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-top: auto;
  padding-top: 0.5rem;
}

.service-card .button {
  margin-top: 0.5rem;
  width: 100%;
}

/* ---------- Service Category Title ---------- */
.service-category-title {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--color-muted);
  text-align: center;
  margin-bottom: 1.5rem;
  margin-top: 3rem;
  padding-bottom: 0.8rem;
  border-bottom: 2px solid var(--color-accent);
  display: block;
  width: fit-content;
  margin-inline: auto;
}

/* ---------- Service Accordion ---------- */
.service-accordion {
  margin-top: 3rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
}

.service-accordion__trigger {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.4rem 2rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background-color 0.2s ease;
}

.service-accordion__trigger:hover {
  background-color: var(--color-soft);
}

.service-accordion__trigger::-webkit-details-marker,
.service-accordion__trigger::marker {
  display: none;
}

.service-accordion__title {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-text);
}

.service-accordion__hint {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-left: auto;
  white-space: nowrap;
}

.service-accordion__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  position: relative;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-accordion__icon::before,
.service-accordion__icon::after {
  content: "";
  position: absolute;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.service-accordion__icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.service-accordion__icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.service-accordion[open] .service-accordion__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.service-accordion[open] .service-accordion__hint {
  display: none;
}

.service-accordion__body {
  padding: 0 2rem 2rem;
}

.service-accordion__body .service-grid--compact {
  margin-top: 0;
}

/* ---------- Compact Service Grid (Web Services) ---------- */
.service-grid--compact {
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.service-card--small {
  padding: 1.8rem 1.5rem;
  gap: 0.8rem;
  text-align: left;
  align-items: flex-start;
}

.service-card--small h3 {
  font-size: 0.9rem;
}

.service-card--small .service-price {
  font-size: 1.2rem;
}

.service-card--small .service-desc {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.service-card--small .button--sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.75rem;
}

/* ---------- Solve (AI Menu) ---------- */
.solve {
  background-color: var(--color-surface);
}

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

.solve-item {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  background-color: var(--color-surface);
}

.solve-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.solve-number {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-accent), #5ba3e0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.solve-item h3 {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.solve-item p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ---------- Process ---------- */
.process {
  background-color: var(--color-soft);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: 2rem 1.5rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  text-align: center;
  transition: all 0.25s ease;
}

.process-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.step-number {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-accent), #5ba3e0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.5;
}

.process-step h3 {
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.process-step p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.7;
}

/* Process connectors */
.process-steps .process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -0.75rem;
  top: 50%;
  width: 0.5rem;
  height: 2px;
  background-color: var(--color-border);
}

/* ---------- Results ---------- */
.results {
  background-color: var(--color-surface);
}

.results-grid {
  display: grid;
  gap: 2rem;
}

.result-card {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 2.5rem;
  padding: 2.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  background-color: var(--color-surface);
  transition: all 0.25s ease;
}

.result-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(10, 102, 194, 0.3);
}

.result-image {
  align-self: center;
}

.result-image img {
  border-radius: var(--radius-sm);
  border: 1px solid #f0f0f0;
}

.result-content {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  justify-content: center;
}

.result-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  width: fit-content;
}

.result-content h3 {
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

.result-content p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.75;
}

.result-metrics {
  display: flex;
  gap: 2rem;
  margin-top: 0.5rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--color-border);
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.metric-value {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-accent);
}

.metric-label {
  font-size: 0.72rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

/* ---------- About ---------- */
.about {
  background-color: var(--color-soft);
}

.about-content {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

.about-portrait {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  width: 180px;
  height: 220px;
  background-color: var(--color-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--color-border);
  position: sticky;
  top: 6rem;
  box-shadow: var(--shadow-card);
}

.about-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-copy {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.about-copy h3 {
  font-size: 1.4rem;
  letter-spacing: 0.08em;
}

.about-position {
  font-size: 0.82rem;
  color: var(--color-accent);
  font-weight: 600;
  line-height: 1.7;
  padding: 0.8rem 1rem;
  background-color: var(--color-accent-soft);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent);
}

.about-copy > p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.92rem;
  line-height: 1.85;
}

.about-strengths {
  margin-top: 1rem;
}

.about-strengths h4 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.about-strengths ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.about-strengths li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  background-color: var(--color-surface);
}

.about-strengths li:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(10, 102, 194, 0.08);
  transform: translateX(4px);
}

.about-strengths li strong {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.about-strengths li span {
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.about-tech {
  margin-top: 1rem;
}

.about-tech h4 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  color: var(--color-text);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  letter-spacing: 0.04em;
  color: var(--color-muted);
  transition: all 0.2s ease;
}

.tech-tags span:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
}

/* ---------- Contact ---------- */
.contact {
  background-color: var(--color-surface);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  column-gap: 4rem;
  row-gap: 3rem;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 1.3rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.form-field {
  display: grid;
  gap: 0.5rem;
}

.form-field label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  font: inherit;
  font-size: 0.9rem;
  color: var(--color-text);
  background-color: var(--color-soft);
  transition: all 0.2s ease;
}

.form-field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23676767' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.1);
}

.form-footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
  margin-top: 0.5rem;
}

.form-status {
  font-size: 0.85rem;
  color: var(--color-muted);
  min-height: 1.5rem;
  text-align: center;
}

.form-status.is-success { color: #157347; }
.form-status.is-error { color: #b42318; }

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  align-self: start;
  padding: 2rem;
  background-color: var(--color-soft);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.contact-info-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.contact-note {
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 600;
}

.contact-mail {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 0.25rem;
  width: fit-content;
  color: var(--color-accent);
}

.contact-detail {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.social-links {
  display: flex;
  gap: 0.8rem;
  margin-top: 0.5rem;
}

.social-button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.social-button img {
  width: 18px;
  height: 18px;
}

.social-button:hover,
.social-button:focus-visible {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 2rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

/* ---------- Animations ---------- */
[data-animate] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger animation for grid children */
.service-grid [data-animate]:nth-child(2) { transition-delay: 0.1s; }
.service-grid [data-animate]:nth-child(3) { transition-delay: 0.2s; }
.service-grid--compact [data-animate]:nth-child(2) { transition-delay: 0.08s; }
.service-grid--compact [data-animate]:nth-child(3) { transition-delay: 0.16s; }
.service-grid--compact [data-animate]:nth-child(4) { transition-delay: 0.24s; }

.solve-grid [data-animate]:nth-child(2) { transition-delay: 0.08s; }
.solve-grid [data-animate]:nth-child(3) { transition-delay: 0.16s; }
.solve-grid [data-animate]:nth-child(4) { transition-delay: 0.24s; }
.solve-grid [data-animate]:nth-child(5) { transition-delay: 0.32s; }
.solve-grid [data-animate]:nth-child(6) { transition-delay: 0.4s; }

.process-steps [data-animate]:nth-child(2) { transition-delay: 0.1s; }
.process-steps [data-animate]:nth-child(3) { transition-delay: 0.2s; }
.process-steps [data-animate]:nth-child(4) { transition-delay: 0.3s; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .service-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

  .service-grid--compact {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

  .solve-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps .process-step::after {
    display: none;
  }
}

@media (max-width: 860px) {
  .result-card {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-portrait {
    margin-inline: auto;
    position: static;
  }

  .about-copy {
    text-align: left;
  }

  .contact-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-info {
    align-items: center;
    text-align: center;
  }

  .contact-mail {
    margin-inline: auto;
  }

  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--max-width), calc(100% - 2rem));
  }

  .header-nav {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .pc-only { display: none; }
  .sp-only { display: inline; }

  .hero-title {
    font-size: clamp(1.4rem, 6.5vw, 2rem);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .button {
    width: 100%;
    text-align: center;
  }

  .service-card {
    padding: 2rem 1.5rem;
  }

  .service-grid--compact {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

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

  .process-steps {
    grid-template-columns: 1fr;
  }

  .result-card {
    padding: 1.5rem;
  }

  .result-metrics {
    gap: 1.5rem;
  }

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

  .social-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
  }

  .number-item {
    padding: 1rem 0.5rem;
  }

  .number-value {
    font-size: 2rem;
  }

  .about-portrait {
    width: 140px;
    height: 170px;
  }

  .hero-tags span {
    font-size: 0.72rem;
    padding: 0.3rem 0.7rem;
  }
}