:root {
  --color-bg: oklch(98% 0.005 240);
  --color-text: oklch(22% 0.02 250);
  --color-primary: oklch(45% 0.15 250);
  --color-primary-hover: oklch(38% 0.15 250);
  --color-dark: oklch(20% 0.03 250);
  --color-accent: oklch(85% 0.1 220);
  --color-hero-grad-start: oklch(95% 0.02 240);
  --color-badge-bg: oklch(90% 0.05 240);
  --color-badge-text: oklch(38% 0.13 250);
  --color-body-text: oklch(38% 0.02 250);
  --color-muted: oklch(45% 0.02 250);
  --color-border: oklch(90% 0.01 240);
  --color-border-2: oklch(88% 0.02 240);
  --color-heading: oklch(20% 0.02 250);
  --color-card-icon-bg: oklch(93% 0.03 240);
  --color-card-text: oklch(42% 0.02 250);
  --color-section-label: oklch(45% 0.15 250);
  --color-footer-text: oklch(48% 0.02 250);
  --color-contact-text: oklch(93% 0.03 240);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

.eyebrow {
  color: var(--color-section-label);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.section-heading {
  text-align: center;
  margin-bottom: 56px;
}

.section-heading h2 {
  font-family: "Poppins", sans-serif;
  font-weight: 800;
  font-size: 34px;
  color: var(--color-heading);
}

/* Header */

.ak-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(98% 0.005 100 / 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-mark-ring {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  border-top-color: transparent;
  transform: rotate(45deg);
}

.brand-mark-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-name {
  font-family: "Poppins", sans-serif;
  font-weight: 800;
  font-size: 20px;
  color: var(--color-heading);
  letter-spacing: -0.01em;
}

/* Hero */

.hero {
  background: linear-gradient(180deg, var(--color-hero-grad-start) 0%, var(--color-bg) 100%);
  padding: 96px 48px 88px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  font-weight: 700;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-family: "Poppins", sans-serif;
  font-weight: 800;
  font-size: 44px;
  line-height: 1.35;
  margin: 0 0 24px;
  color: var(--color-heading);
  letter-spacing: -0.01em;
}

.hero .lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-body-text);
  margin: 0 auto;
  max-width: 560px;
}

/* Apps */

.apps {
  padding: 88px 48px;
  max-width: 1000px;
  margin: 0 auto;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.app-card {
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 32px;
  background: white;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app-card-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--color-card-icon-bg);
  overflow: hidden;
}

.app-card-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card h3 {
  font-family: "Poppins", sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: var(--color-heading);
}

.app-card p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--color-card-text);
  margin: 0;
  flex-grow: 1;
}

.app-card-link {
  font-weight: 700;
  font-size: 14px;
}

.app-card-link::after {
  content: " →";
}

/* Contact */

.contact {
  background: var(--color-primary);
  padding: 80px 48px;
  text-align: center;
}

.contact h2 {
  font-family: "Poppins", sans-serif;
  font-weight: 800;
  font-size: 32px;
  color: white;
  margin: 0 0 16px;
}

.contact p {
  color: var(--color-contact-text);
  font-size: 16px;
  margin: 0 0 28px;
}

.contact-link {
  display: inline-block;
  background: white;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 999px;
}

.contact-link:hover {
  color: var(--color-primary-hover);
}

/* Footer */

.ak-footer {
  padding: 40px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--color-footer-text);
  font-size: 13px;
  border-top: 1px solid var(--color-border);
}

.footer-links {
  display: flex;
  gap: 20px;
}

/* Responsive */

@media (max-width: 900px) {
  .hero { padding: 64px 24px; }
  .hero h1 { font-size: 32px; }
  .ak-header { padding: 16px 24px; }
  .apps { padding: 56px 24px; }
  .contact { padding: 56px 24px; }
  .ak-footer { padding: 32px 24px; justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .ak-header { padding: 14px 16px; gap: 8px; }
  .brand-name { font-size: 17px; }
  .hero h1 { font-size: 26px; }
  .app-grid { grid-template-columns: 1fr; }
}