/* ===========================
   CSS Variables
=========================== */
:root {
  --color-teal:    #1B7B8C;
  --color-teal-dark: #145f6e;
  --color-teal-light: #e8f6f8;
  --color-orange:  #F4831F;
  --color-orange-light: #fff4ec;
  --color-yellow:  #FFC72C;
  --color-pink:    #E8749A;
  --color-pink-light: #fef0f5;
  --color-green:   #5CB85C;
  --color-green-light: #eef8ee;
  --color-white:   #ffffff;
  --color-bg:      #F7FAFB;
  --color-text:    #1a2e35;
  --color-text-sub: #5a7280;
  --color-border:  #dde6ea;

  --font-base: 'Noto Sans JP', sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 8px 32px rgba(0,0,0,.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.12);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ===========================
   Reset & Base
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.pc-only { display: inline; }
.mt-24 { margin-top: 24px; }

/* ===========================
   Typography helpers
=========================== */
.section-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--color-teal);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 900;
  line-height: 1.35;
  color: var(--color-text);
}
.section-desc {
  margin-top: 16px;
  color: var(--color-text-sub);
  font-size: .95rem;
  line-height: 1.8;
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section { padding: 96px 0; }
.section-alt { background: var(--color-bg); }

.color-orange { color: var(--color-orange); }
.color-teal   { color: var(--color-teal); }
.color-pink   { color: var(--color-pink); }
.color-green  { color: var(--color-green); }

/* ===========================
   Buttons
=========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 700;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-teal);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(27,123,140,.3);
}
.btn-primary:hover {
  background: var(--color-teal-dark);
  box-shadow: 0 6px 28px rgba(27,123,140,.4);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--color-teal);
  border: 2px solid var(--color-teal);
}
.btn-outline:hover {
  background: var(--color-teal-light);
  transform: translateY(-2px);
}
.btn-large { padding: 18px 48px; font-size: 1rem; }

/* ===========================
   Hero Badges & Grid Overlay
=========================== */
.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27,123,140,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,123,140,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 0;
  pointer-events: none;
}
.hero-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 8px 18px;
  font-size: .78rem;
  font-weight: 700;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  z-index: 1;
  animation: badgeFloat 6s ease-in-out infinite;
}
.hero-badge.b1 { top: 22%; right: 8%;  animation-delay: 0s; }
.hero-badge.b2 { top: 38%; right: 12%; animation-delay: 1.5s; }
.hero-badge.b3 { top: 54%; right: 6%;  animation-delay: 3s; }
@keyframes badgeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-teal);
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}
.badge-dot.dot-green  { background: var(--color-green); }
.badge-dot.dot-orange { background: var(--color-orange); }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(1.4); }
}

/* ===========================
   Tech Stack
=========================== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.tech-category {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  transition: var(--transition);
}
.tech-category:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
  transform: translateY(-4px);
}
.tech-cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.tech-cat-icon { font-size: 1.5rem; }
.tech-cat-title { font-size: 1rem; font-weight: 700; }
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tech-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: .78rem;
  font-weight: 700;
  background: var(--color-bg);
  color: var(--color-teal);
  border: 1px solid var(--color-teal-light);
  padding: 5px 14px;
  border-radius: 6px;
  transition: var(--transition);
}
.tech-tag:hover {
  background: var(--color-teal-light);
  border-color: var(--color-teal);
}

/* ===========================
   Header
=========================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo-img {
  height: 48px;
  width: auto;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 50px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
}
.nav-link:hover { background: var(--color-teal-light); color: var(--color-teal); }
.nav-cta {
  background: var(--color-teal);
  color: var(--color-white) !important;
  margin-left: 8px;
}
.nav-cta:hover { background: var(--color-teal-dark) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===========================
   Hero
=========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 72px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f0fafc 0%, #fff8f2 50%, #fef9ec 100%);
  z-index: 0;
}
.hero-circle {
  position: absolute;
  border-radius: 50%;
  opacity: .18;
  animation: float 8s ease-in-out infinite;
}
.hero-circle.c1 {
  width: 560px; height: 560px;
  background: radial-gradient(circle, var(--color-teal), transparent);
  top: -120px; right: -80px;
  animation-delay: 0s;
}
.hero-circle.c2 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, var(--color-orange), transparent);
  bottom: 40px; left: -60px;
  animation-delay: 2s;
}
.hero-circle.c3 {
  width: 240px; height: 240px;
  background: radial-gradient(circle, var(--color-pink), transparent);
  top: 40%; right: 20%;
  animation-delay: 4s;
}
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-24px) scale(1.04); }
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding-top: 40px;
  padding-bottom: 80px;
}
.hero-eyebrow {
  display: inline-block;
  background: var(--color-teal-light);
  color: var(--color-teal);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .12em;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 24px;
  border: 1px solid rgba(27,123,140,.2);
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 24px;
}
.hero-lead {
  font-size: clamp(.95rem, 1.5vw, 1.1rem);
  color: var(--color-text-sub);
  line-height: 1.9;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-sub);
  font-size: .7rem;
  letter-spacing: .12em;
  z-index: 1;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-teal), transparent);
  animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===========================
   About
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.about-lead {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 20px 0 16px;
  line-height: 1.65;
}
.about-body {
  color: var(--color-text-sub);
  font-size: .95rem;
  line-height: 1.85;
  margin-bottom: 12px;
}
.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-card {
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
}
.about-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.about-card-icon { font-size: 2rem; margin-bottom: 8px; }
.about-card-num {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--color-text);
  margin-bottom: 4px;
}
.about-card-label {
  font-size: .78rem;
  color: var(--color-text-sub);
}
.ac-orange { background: var(--color-orange-light); }
.ac-teal   { background: var(--color-teal-light); }
.ac-pink   { background: var(--color-pink-light); }
.ac-green  { background: var(--color-green-light); }

/* ===========================
   Services
=========================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--color-border);
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card-featured {
  border-color: var(--color-teal);
  box-shadow: 0 0 0 1px var(--color-teal), var(--shadow-md);
}
.service-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-teal);
  color: var(--color-white);
  font-size: .75rem;
  font-weight: 700;
  padding: 4px 20px;
  border-radius: 50px;
  letter-spacing: .08em;
  white-space: nowrap;
}
.service-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.color-orange.service-icon-wrap { background: var(--color-orange-light); color: var(--color-orange); }
.color-teal.service-icon-wrap   { background: var(--color-teal-light);   color: var(--color-teal); }
.color-green.service-icon-wrap  { background: var(--color-green-light);  color: var(--color-green); }
.service-icon { width: 36px; height: 36px; }
.service-title {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 14px;
}
.service-desc {
  font-size: .9rem;
  color: var(--color-text-sub);
  line-height: 1.8;
  margin-bottom: 20px;
}
.service-list {
  margin-bottom: 24px;
  flex: 1;
}
.service-list li {
  font-size: .875rem;
  color: var(--color-text-sub);
  padding: 7px 0;
  border-bottom: 1px dashed var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.service-list li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-teal);
  flex-shrink: 0;
}
.service-link {
  font-size: .875rem;
  font-weight: 700;
  color: var(--color-teal);
  transition: var(--transition);
  margin-top: auto;
}
.service-link:hover { color: var(--color-teal-dark); letter-spacing: .04em; }

/* ===========================
   Features
=========================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 64px;
}
.feature-item { display: flex; flex-direction: column; gap: 12px; }
.feature-num {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  opacity: .8;
}
.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
}
.feature-desc {
  font-size: .9rem;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ===========================
   News
=========================== */
.news-list {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 32px;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}
.news-item:last-child { border-bottom: none; }
.news-item:hover { background: var(--color-bg); }
.news-date {
  font-size: .85rem;
  color: var(--color-text-sub);
  white-space: nowrap;
  font-feature-settings: "tnum";
}
.news-tag {
  font-size: .72rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 50px;
  white-space: nowrap;
}
.tag-info    { background: var(--color-teal-light);  color: var(--color-teal); }
.tag-service { background: var(--color-orange-light); color: var(--color-orange); }
.tag-event   { background: var(--color-pink-light);   color: var(--color-pink); }
.news-title {
  font-size: .9rem;
  color: var(--color-text);
  transition: var(--transition);
  flex: 1;
}
.news-title:hover { color: var(--color-teal); text-decoration: underline; }
.news-more {
  text-align: center;
  margin-top: 40px;
}

/* ===========================
   Contact
=========================== */
.contact-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 56px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 0; }
.form-group + .form-group { margin-top: 0; }
.contact-form > .form-group { margin-bottom: 20px; }
.form-label {
  font-size: .85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.required {
  font-size: .7rem;
  background: var(--color-teal);
  color: var(--color-white);
  padding: 2px 8px;
  border-radius: 50px;
}
.form-input {
  padding: 13px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: var(--font-base);
  color: var(--color-text);
  transition: var(--transition);
  background: var(--color-white);
  width: 100%;
}
.form-input:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(27,123,140,.12);
}
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg width='16' height='16' viewBox='0 0 16 16' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%231B7B8C' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 40px; }
.form-textarea { min-height: 160px; resize: vertical; }
.form-submit { text-align: center; margin-top: 8px; }
.form-message {
  text-align: center;
  margin-top: 16px;
  font-size: .9rem;
  font-weight: 500;
  min-height: 24px;
}
.form-message.success { color: var(--color-green); }
.form-message.error   { color: #e04040; }

/* ===========================
   Footer
=========================== */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,.7);
}
.footer-inner {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  padding-top: 64px;
  padding-bottom: 64px;
}
.footer-logo { height: 52px; width: auto; margin-bottom: 16px; filter: brightness(10); }
.footer-tagline {
  font-size: .875rem;
  line-height: 1.75;
  color: rgba(255,255,255,.55);
}
.footer-nav {
  display: flex;
  gap: 48px;
  justify-content: flex-end;
}
.footer-nav-col { min-width: 120px; }
.footer-nav-title {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.9);
  margin-bottom: 16px;
}
.footer-nav-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-nav-col a {
  font-size: .85rem;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}
.footer-nav-col a:hover { color: var(--color-white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  text-align: center;
}
.footer-copy { font-size: .78rem; color: rgba(255,255,255,.35); }

/* ===========================
   Scroll Animations
=========================== */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
  .pc-only { display: none; }
  .section { padding: 64px 0; }

  .nav {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px 24px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 99;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-link { padding: 12px 16px; border-radius: var(--radius-sm); }
  .nav-cta { text-align: center; margin-left: 0; margin-top: 8px; }
  .hamburger { display: flex; }

  .hero-title { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; }

  .about-visual { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr; gap: 32px; }
  .tech-grid { grid-template-columns: 1fr; }
  .hero-badge { display: none; }

  .news-item { flex-wrap: wrap; gap: 10px; padding: 16px 20px; }
  .news-date { width: 100%; }

  .contact-form { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; }

  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-nav { justify-content: flex-start; flex-wrap: wrap; gap: 32px; }
}

@media (max-width: 480px) {
  .about-visual { grid-template-columns: 1fr 1fr; gap: 12px; }
  .about-card { padding: 18px 14px; }
  .hero-scroll-indicator { display: none; }
}