:root {
  --main: #0f2742;
  --accent: #1f6feb;
  --accent-secondary: #08a9aa;
  --bg: #f5f7fa;
  --text: #1f2933;
  --muted: #5f6b7a;
  --card: #ffffff;
  --border: #d9e2ec;
}

/* =========================
   Reset / Base
========================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

/* =========================
   Header
========================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;

  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.header-inner {
  width: min(1120px, calc(100% - 48px));
  min-height: 96px;
  margin: 0 auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-logo {
  display: block;
  flex: 0 0 auto;
  line-height: 0;
}

.site-logo img {
  display: block;
  width: auto;
  height: 64px;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.global-nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;

  transition:
    color 0.2s ease,
    opacity 0.2s ease;
}

.global-nav a:not(.nav-contact):hover,
.global-nav a:not(.nav-contact)[aria-current="page"] {
  color: var(--accent);
}

.global-nav .nav-contact {
  padding: 10px 18px;

  color: #ffffff;
  background: linear-gradient(100deg, var(--accent), var(--accent-secondary));

  border-radius: 6px;
}

.global-nav .nav-contact,
.global-nav .nav-contact:hover,
.global-nav .nav-contact[aria-current="page"],
.global-nav .nav-contact:visited {
  color: #ffffff;
}

.global-nav .nav-contact:hover {
  opacity: 0.85;
}

/* =========================
   Common
========================= */

.section {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 72px 0;
}

h1,
h2,
h3 {
  line-height: 1.45;
}

h1 {
  color: var(--main);
  font-size: 36px;
}

h2 {
  color: var(--main);
}

.lead {
  max-width: 760px;
  color: var(--muted);
}

.button {
  display: inline-flex;
  min-height: 50px;
  padding: 0 24px;

  align-items: center;
  justify-content: center;

  border: 1px solid transparent;
  border-radius: 7px;

  font-weight: 700;
  text-decoration: none;

  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    opacity 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #ffffff;
  background: linear-gradient(100deg, var(--accent), var(--accent-secondary));
  box-shadow: 0 10px 25px rgba(31, 111, 235, 0.2);
}

.button-secondary {
  color: var(--accent);
  background: #ffffff;
  border-color: rgba(31, 111, 235, 0.3);
}

/* =========================
   Hero
========================= */

.hero {
  color: var(--text);

  background:
    radial-gradient(
      circle at 18% 22%,
      rgba(31, 111, 235, 0.09),
      transparent 38%
    ),
    radial-gradient(circle at 84% 70%, rgba(8, 169, 170, 0.1), transparent 34%),
    #ffffff;
}

.hero-inner {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 88px 0 96px;

  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
  align-items: center;
  gap: 48px;
}

.hero-content {
  min-width: 0;
}

.hero-kicker {
  margin: 0 0 18px;

  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero h1 {
  margin: 0;

  color: var(--main);
  font-size: clamp(38px, 4.2vw, 54px);
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.hero-title-line {
  display: block;
  white-space: nowrap;
}

.hero-description {
  max-width: 680px;
  margin: 28px 0 0;

  color: var(--muted);
  font-size: 17px;
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.hero-photo {
  position: relative;
  width: 88%;
  margin-left: auto;
}

.hero-photo::before {
  position: absolute;
  inset: 20px -18px -18px 20px;
  z-index: 0;

  content: "";
  border-radius: 16px;

  background: linear-gradient(
    135deg,
    rgba(31, 111, 235, 0.14),
    rgba(8, 169, 170, 0.18)
  );
}

.hero-photo img {
  position: relative;
  z-index: 1;

  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;

  border-radius: 16px;
  box-shadow: 0 18px 45px rgba(20, 43, 66, 0.15);

  transition: transform 0.2s ease;
}

.hero-photo img:hover {
  transform: scale(1.02);
}

/* =========================
   Cards
========================= */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.card {
  margin: 40px 0;
  padding: 36px;

  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.cards .card {
  margin: 0;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 20px;
}

.card h3 {
  margin-top: 0;
  color: var(--main);
}

.card p:last-child {
  margin-bottom: 0;
}

.card .case-image {
  margin-top: 28px;
}

.card ul {
  padding-left: 1.4em;
}

.card li + li {
  margin-top: 6px;
}

/* =========================
   Case blocks
========================= */

.case {
  background: #ffffff;
  border-top: 1px solid var(--border);
}

.case + .case {
  border-top: none;
}

.case-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 40px;
  align-items: center;
}

.case-content {
  min-width: 0;
}

.case-image img {
  display: block;
  width: 100%;

  border: 1px solid var(--border);
  border-radius: 16px;

  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.13);

  transition: transform 0.2s ease;
}

.case-image img:hover {
  transform: scale(1.02);
}

/* =========================
   Badges
========================= */

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}

.badge {
  padding: 4px 12px;

  color: #174ea6;
  background: #e8f1ff;
  border-radius: 999px;

  font-size: 13px;
}

/* =========================
   Works
========================= */

.work-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 28px;
  align-items: center;
}

.work-image img {
  display: block;
  width: 100%;

  border: 1px solid var(--border);
  border-radius: 14px;

  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

/* =========================
   Stats
========================= */

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.stat {
  padding: 16px;

  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 14px;
}

.stat strong {
  display: block;
  color: var(--accent);
  font-size: 26px;
}

/* =========================
   Contact
========================= */

.form-area {
  margin-top: 32px;
  padding: 32px;

  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.form-area h2 {
  margin-top: 0;
  color: var(--main);
}

.contact-button {
  display: inline-block;
  margin-top: 16px;
  padding: 14px 28px;

  color: #ffffff;
  background: var(--main);
  border-radius: 999px;

  font-weight: 700;
}

.note {
  margin-top: 24px;
  color: var(--muted);
  font-size: 14px;
}

/* =========================
   CTA
========================= */

.cta {
  color: #ffffff;
  text-align: center;
  background: var(--main);
}

.cta h2 {
  color: #ffffff;
}

.cta p {
  color: #dbeafe;
}

.cta .button-primary {
  color: var(--main);
  background: #ffffff;
  box-shadow: none;
}

/* =========================
   Footer
========================= */

.footer {
  padding: 40px 24px;

  color: #cbd5e1;
  background: #0b1d30;

  text-align: center;
}

.footer-company {
  margin-bottom: 12px;
  font-size: 18px;
  font-weight: 700;
}

.footer-links {
  margin-bottom: 12px;
}

.footer-links a {
  margin: 0 12px;
  color: #cbd5e1;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-copy {
  font-size: 13px;
  opacity: 0.8;
}

/* =========================
   Responsive
========================= */

@media (max-width: 800px) {
  .header-inner {
    width: calc(100% - 28px);
    min-height: 68px;
    gap: 16px;
  }

  .site-logo img {
    height: 38px;
  }

  .global-nav {
    gap: 12px;
  }

  .global-nav a:not(.nav-contact) {
    display: none;
  }

  .global-nav .nav-contact {
    padding: 9px 13px;
    font-size: 13px;
  }

  .section {
    width: calc(100% - 32px);
    padding: 56px 0;
  }

  .hero-inner {
    width: calc(100% - 32px);
    padding: 58px 0 72px;

    grid-template-columns: 1fr;
    gap: 46px;
  }

  .hero h1 {
    font-size: clamp(32px, 9vw, 44px);
  }

  .hero-title-line {
    white-space: normal;
  }

  .hero-description {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .hero-photo {
    width: 100%;
    margin-left: 0;
  }

  .case-grid,
  .cards,
  .work-card {
    grid-template-columns: 1fr;
  }

  .cards {
    gap: 18px;
  }

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

  .card {
    margin: 28px 0;
    padding: 24px;
  }

  .cards .card {
    margin: 0;
  }
}