@charset "UTF-8";

:root {
  --color-bg-light:   #FFFFFF;
  --color-bg-dark:    #000000;
  --color-text-light: #FFFBFB;
  --color-text-dark:  #000000;
  --color-brand:          #231815;
  --color-footer-border:  #555555;

  --font-en: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-jp: 'Noto Sans JP',
             'Hiragino Kaku Gothic ProN', 'Hiragino Sans',
             'Yu Gothic Medium', 'Yu Gothic', 'YuGothic', 'Yu Gothic UI',
             'Meiryo',
             'Helvetica Neue', Helvetica, Arial, sans-serif;

  --tracking-hero: 0.1em;

  --max-width: 1440px;
  --content-padding: 80px;

  --logo-width-desktop: min(62vw, 820px);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-jp);
  color: var(--color-text-dark);
  background: var(--color-bg-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; height: auto; display: block; }

.hero {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: 0;
  background: var(--color-bg-light);

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px var(--content-padding);
  text-align: center;
}

.hero__logo {
  width: var(--logo-width-desktop);
  margin: 0 0 32px;
  display: flex;
  justify-content: center;
  will-change: transform, opacity;
}

.hero__logo img {
  width: 100%;
  height: auto;
}

.hero__tagline {
  font-family: var(--font-jp);
  font-size: clamp(14px, 1.4vw, 20px);
  letter-spacing: var(--tracking-hero);
  color: var(--color-text-dark);
  margin: 0;
  font-weight: 400;
  will-change: transform, opacity;
  min-height: 1.6em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.hero__tagline-cursor {
  display: inline-block;
  margin-left: 2px;
  font-weight: 300;
  animation: taglineCaretBlink 1s steps(1) infinite;
}

@keyframes taglineCaretBlink {
  0%, 50%   { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

.content {
  position: relative;
  z-index: 1;
  margin-top: 100vh;
  background: var(--color-bg-dark);
}

.global-nav {
  position: absolute;
  top: 40px;
  right: var(--content-padding);
  display: flex;
  gap: 40px;
  z-index: 10;
}

.global-nav a {
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--color-text-dark);
  transition: opacity 0.2s;
}

.global-nav a:hover { opacity: 0.6; }

.company {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  padding: 120px var(--content-padding) 140px;
}

.company__inner {
  max-width: 1200px;
  margin: 0 auto;
}

.company__title {
  font-family: var(--font-en);
  font-size: 40px;
  font-weight: 400;
  letter-spacing: 1.6px;
  margin: 0 0 60px;
  color: var(--color-text-light);
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.company__title::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 0.95em;
  background: currentColor;
  margin-right: 24px;
}

.company__table {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 22px 80px;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
}

.company__table dt,
.company__table dd {
  margin: 0;
  color: var(--color-text-light);
  font-family: var(--font-jp);
  font-weight: 400;
}

.company__table dd.en {
  font-family: var(--font-en);
}

.footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-footer-border);
  color: var(--color-text-light);
  padding: 20px var(--content-padding);
  font-family: var(--font-en);
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__nav {
  display: flex;
  gap: 68px;
  align-items: center;
}

.footer__link {
  font-size: 14px;
  color: var(--color-text-light);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: opacity 0.2s;
}

.footer__link:hover { opacity: 0.7; }

.footer__ext-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
}

.footer__copyright {
  font-size: 12px;
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  :root {
    --content-padding: 24px;
    --logo-width-desktop: 84vw;
  }

  .hero {
    padding: 0 24px 80px;
  }

  .hero__logo {
    margin-bottom: 24px;
  }

  .hero__tagline {
    padding: 0 8px;
    letter-spacing: 0.05em;
  }

  .company {
    padding: 80px 24px 80px;
  }

  .company__title {
    font-size: 28px;
    margin-bottom: 40px;
  }

  .company__table {
    grid-template-columns: 1fr;
    gap: 4px 0;
    font-size: 15px;
  }

  .company__table dt {
    margin-top: 14px;
    opacity: 0.6;
    font-size: 13px;
  }

  .company__table dt:first-of-type { margin-top: 0; }

  .footer {
    padding: 24px;
  }

  .footer__inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
  }

  .footer__nav {
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .global-nav {
    top: 20px;
    right: 20px;
    gap: 20px;
  }

  .global-nav a {
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body { animation: none !important; }
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(150deg, #050505, #7D7D7D, #333333, #000000, #767676, #000000);
  background-size: 1400% 1400%;
  animation: GradientBackground 10s ease infinite;
  will-change: background-position;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

@keyframes GradientBackground {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero { background: transparent; }

.hero__tagline { color: #FFFFFF; }

.hero__logo img { filter: invert(1); }

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none !important; }
}

.page-privacy { background: transparent; }

.page-header {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 54px var(--content-padding) 40px;
}

.page-header__logo {
  display: inline-block;
  width: min(28vw, 400px);
  transition: opacity 0.2s;
}

.page-header__logo:hover { opacity: 0.7; }

.page-header__logo img {
  width: 100%;
  height: auto;
  filter: invert(1);
}

.page-main {
  position: relative;
  z-index: 1;
  padding: 0 var(--content-padding) 80px;
}

.privacy {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--color-bg-light);
  color: var(--color-text-dark);
  border-radius: 4px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.2);
}

.privacy__inner {
  padding: 80px 100px 100px;
}

.privacy__title {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 32px;
  color: var(--color-text-dark);
  line-height: 1;
}

.privacy__body {
  font-family: var(--font-jp);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-text-dark);
}

.privacy__lead {
  margin: 0 0 32px;
}

.privacy__article {
  margin: 0 0 32px;
}

.privacy__heading {
  font-family: var(--font-jp);
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 8px;
  line-height: 1.6;
}

.privacy__body p {
  margin: 0 0 4px;
}

.privacy__roman {
  padding-left: 1.4em;
}

.privacy__contact {
  margin: 16px 0;
}

.privacy__appendix {
  margin-top: 48px;
  font-size: 15px;
}

@media (max-width: 768px) {
  .page-header {
    padding: 32px 24px 24px;
  }

  .page-header__logo {
    width: min(72vw, 320px);
  }

  .page-main {
    padding: 0 16px 60px;
  }

  .privacy__inner {
    padding: 40px 24px 56px;
  }

  .privacy__title {
    font-size: 18px;
    margin-bottom: 24px;
  }

  .privacy__body {
    font-size: 14px;
    line-height: 1.75;
  }

  .privacy__heading {
    font-size: 14px;
  }

  .privacy__appendix {
    font-size: 13px;
  }
}

/* ---- SP only utilities ---- */
.br-sp { display: none; }
@media (max-width: 768px) {
  .br-sp { display: inline; }
}

/* ---- SP only: prevent white flash behind fixed gradient on initial scroll ---- */
@media (max-width: 768px) {
  html { background: var(--color-bg-dark); }
}

.company__isms-logo {
  width: 180px;
  display: block; /* 余計な隙間を防ぐためにブロック要素化 */
}