/* ========================================
   エア（白 × スカイブルー）
   styles.css の上に読み込み、サイト全体の
   配色・FV・装飾アイコンを定義する
   ======================================== */

:root {
  --air-bg: #f7fbfe;
  --air-panel: #ffffff;
  --air-ink: #18344d;
  --air-cyan: #1686c7;
  --air-muted: #60788b;
  --air-line: #d7e8f2;
  --air-icon-bg: #e4f5fc;
}

body {
  background: var(--air-bg);
  color: var(--air-ink);
  font-family: "IBM Plex Sans JP", "Zen Kaku Gothic New", sans-serif;
}

/* ---------- アイコン ---------- */
.icon {
  width: 1.35rem;
  height: 1.35rem;
  flex: 0 0 auto;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon--lg {
  width: 1.75rem;
  height: 1.75rem;
}

/* ---------- ヘッダー ---------- */
.site-header {
  height: auto;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--air-line);
}

.site-nav a {
  color: var(--air-ink);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--air-cyan);
}

/* ---------- ファーストビュー ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: stretch;
  color: var(--air-ink);
  background-color: var(--air-panel);
  background-image:
    radial-gradient(circle at 8% 14%, rgba(91, 194, 233, 0.2), transparent 28%),
    radial-gradient(circle at 76% 86%, rgba(182, 225, 207, 0.28), transparent 30%),
    linear-gradient(135deg, #ffffff 0%, var(--air-bg) 65%);
  overflow: hidden;
}

.hero__visual {
  position: relative;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  margin: clamp(1.25rem, 3vw, 2.5rem) clamp(1.25rem, 4vw, 3.5rem) clamp(1.25rem, 3vw, 2.5rem) 0;
  border: 8px solid rgba(255, 255, 255, 0.86);
  border-radius: 2rem 0.5rem 2rem 0.5rem;
  background: var(--air-panel);
  box-shadow: 0 24px 70px rgba(48, 111, 147, 0.18);
  overflow: hidden;
}

.hero__visual::before,
.hero__visual::after {
  position: absolute;
  top: 0.7rem;
  z-index: 2;
  padding: 0.25rem 0.55rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  color: var(--air-ink);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
}

.hero__visual::before {
  content: "WORLDTEC";
  left: 0.8rem;
}

.hero__visual::after {
  content: "NIIGATA / JP";
  right: 0.8rem;
}

.hero__visual-photo {
  min-height: 0;
  position: relative;
  overflow: hidden;
  filter: saturate(0.82) brightness(1.08);
}

.hero__visual-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255, 255, 255, 0.02), rgba(22, 134, 199, 0.1));
  pointer-events: none;
}

.hero__visual-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__visual-spec {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--air-line);
}

.hero__visual-spec span {
  padding: 0.75rem 0.55rem;
  border-right: 1px solid var(--air-line);
  color: var(--air-ink);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-align: center;
}

.hero__inner {
  position: relative;
  z-index: 2;
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  width: auto;
  max-width: 42rem;
  margin: 0;
  padding: clamp(2rem, 7vw, 6rem) clamp(1.5rem, 5vw, 5rem);
  color: var(--air-ink);
  animation: air-rise 0.7s ease both;
}

.hero__kicker {
  margin: 0 0 1.15rem;
  color: var(--air-cyan);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
}

.hero__brand {
  margin: 0 0 1rem;
  color: var(--air-ink);
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  line-height: 1.15;
  white-space: normal;
  text-shadow: none;
}

.hero__headline {
  color: var(--air-cyan);
  letter-spacing: 0.08em;
}

.hero__text {
  max-width: 35rem;
  color: var(--air-muted);
}

.hero__actions .btn--primary {
  border-radius: 999px;
  background: var(--air-panel);
  border-color: var(--air-line);
  color: var(--air-ink);
  box-shadow: 0 8px 22px rgba(48, 111, 147, 0.09);
}

.hero__actions .btn--primary:hover,
.hero__actions .btn--primary:focus-visible {
  background: var(--air-cyan);
  border-color: var(--air-cyan);
  color: #fff;
}

/* ---------- セクション共通 ---------- */
.section {
  background: var(--air-bg);
}

.section--alt {
  background: #edf7fc;
}

.section__label {
  color: var(--air-cyan);
  font-family: Consolas, "Courier New", monospace;
}

.section__title {
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--air-line);
  color: var(--air-ink);
}

.section__lead,
.about__body p,
.business-item__text,
.strength-item__text,
.work-card__text,
.work-card__points li {
  color: var(--air-muted);
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 0.3rem;
}

.section-head__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-top: 0.1rem;
  flex: 0 0 auto;
  color: var(--air-cyan);
  background: var(--air-icon-bg);
  border: 1px solid var(--air-line);
  border-radius: 999px;
}

/* ---------- カード ---------- */
.about__tag,
.business-item,
.strength-item,
.work-card {
  background: var(--air-panel);
  border: 1px solid var(--air-line);
  border-radius: 1rem;
  color: var(--air-ink);
  box-shadow: 0 12px 32px rgba(48, 111, 147, 0.07);
}

.about__tag {
  align-items: center;
  gap: 0.45rem;
  border-left: 3px solid var(--air-cyan);
}

.business-item,
.strength-item {
  position: relative;
}

.business-item__icon,
.strength-item__icon {
  display: grid;
  place-items: center;
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 2.55rem;
  height: 2.55rem;
  color: var(--air-cyan);
  background: var(--air-icon-bg);
  border: 1px solid var(--air-line);
  border-radius: 999px;
  opacity: 0.92;
  pointer-events: none;
}

.business-item__icon .icon,
.strength-item__icon .icon {
  width: 1.3rem;
  height: 1.3rem;
}

.business-item__num,
.strength-item__index {
  color: var(--air-cyan);
  font-family: Consolas, "Courier New", monospace;
}

/* ---------- 開発事例 ---------- */
.work-card {
  padding: 1rem;
}

.work-card__media {
  width: 100%;
  height: clamp(250px, 24vw, 320px);
  min-height: 0;
  aspect-ratio: auto;
  filter: saturate(0.6);
}

.work-card__media img {
  width: 100%;
  height: 100%;
}

.work-card__media--ticket,
.work-card__media--attraction,
.work-card__media--presence {
  background: #fff;
}

.work-card__media--ticket img,
.work-card__media--attraction img,
.work-card__media--presence img {
  object-fit: contain;
  object-position: center;
}

.work-card__media--ticket img {
  transform: translateX(-3.5%);
}

.work-card__media--attraction {
  padding: 0.5rem;
}

.work-card__media--presence {
  padding: 1.75rem;
}

.work-card__body {
  min-height: 20rem;
}

.work-card__title {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  color: var(--air-ink);
}

/* ---------- 会社概要・お問い合わせ ---------- */
.company-table,
.company-map,
.form-control,
.privacy-policy {
  background: var(--air-panel);
  border-color: var(--air-line);
  border-radius: 0.75rem;
  color: var(--air-ink);
}

.company-table th,
.company-map__title {
  background: rgba(69, 216, 242, 0.09);
  border-color: var(--air-line);
  color: var(--air-cyan);
}

.company-table td,
.company-table td a,
.form-label,
.form-check {
  border-color: var(--air-line);
  color: var(--air-ink);
}

.company-address__label,
.company-map__title {
  align-items: center;
  gap: 0.35rem;
}

.company-address__label .icon,
.company-map__title .icon {
  width: 1rem;
  height: 1rem;
}

.btn--accent {
  border-radius: 999px;
  background: var(--air-cyan);
  border-color: var(--air-cyan);
  color: #fff;
}

/* ---------- 本文に添える小アイコン ---------- */
.about__tag .icon,
.work-card__title .icon,
.company-address__label .icon,
.company-map__title .icon {
  display: inline-flex;
  color: var(--air-cyan);
}

/* ---------- フッター ---------- */
.site-footer {
  background: #e5f3fa;
  border-top: 1px solid var(--air-line);
  color: var(--air-ink);
}

.site-footer__brand-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.75rem;
}

.site-footer__brand-row .site-footer__brand {
  margin: 0;
}

.site-footer__brand {
  color: var(--air-ink);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.1rem;
  margin: 0 0 1.25rem;
}

.site-footer__nav a {
  color: var(--air-ink);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible,
.site-footer__meta a:hover,
.site-footer__meta a:focus-visible {
  color: var(--air-cyan);
}

.site-footer__meta a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.site-footer__copy {
  color: var(--air-muted);
  border-top-color: var(--air-line);
}

/* ---------- utility pages / a11y ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 200;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--air-cyan);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: 0 8px 22px rgba(48, 111, 147, 0.18);
}

.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--air-ink);
  outline-offset: 2px;
}

.utility-page {
  max-width: 42rem;
  padding-block: clamp(3rem, 8vw, 5rem);
}

.utility-page__lead,
.utility-page__note,
.form-note {
  color: var(--air-muted);
  line-height: 1.9;
}

.utility-page__note,
.form-note {
  margin: 1.25rem 0 0;
  font-size: 0.92rem;
}

.form-note {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1rem;
  background: #edf7fc;
  border: 1px solid var(--air-line);
  border-radius: 0.75rem;
}

.form-note a,
.utility-page__note a {
  color: var(--air-cyan);
  font-weight: 700;
}

.utility-page__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.utility-page__secondary {
  border-radius: 999px;
  background: var(--air-panel);
  border: 1px solid var(--air-line);
  color: var(--air-ink);
  box-shadow: 0 8px 22px rgba(48, 111, 147, 0.09);
}

.utility-page__secondary:hover,
.utility-page__secondary:focus-visible {
  background: var(--air-cyan);
  border-color: var(--air-cyan);
  color: #fff;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.privacy-policy:focus-visible {
  outline: 2px solid var(--air-cyan);
  outline-offset: 2px;
}

/* ---------- motion ---------- */
@keyframes air-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(260px, 42vh) auto;
  }

  .hero__visual {
    grid-column: 1;
    grid-row: 1;
    margin: 1rem;
    box-shadow: 8px 8px 0 rgba(69, 216, 242, 0.08);
  }

  .hero__inner {
    grid-column: 1;
    grid-row: 2;
    max-width: none;
    align-self: stretch;
    padding-block: 2rem 2.5rem;
  }
}

@media (max-width: 768px) {
  .site-nav {
    background: rgba(255, 255, 255, 0.99);
  }

  .nav-toggle {
    background: var(--air-panel);
    border-color: var(--air-line);
  }

  .nav-toggle__bar {
    background: var(--air-ink);
  }

  .hero__visual-spec {
    grid-template-columns: 1fr;
  }

  .hero__visual-spec span {
    display: none;
  }

  .hero__visual-spec span:first-child {
    display: block;
    border-right: 0;
  }

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

  .work-card__media {
    height: 230px;
  }

  .work-card__body {
    min-height: 18rem;
  }
}

@media (max-width: 640px) {
  .section-head__icon {
    width: 2.4rem;
    height: 2.4rem;
  }

  .business-item__icon,
  .strength-item__icon {
    width: 2.2rem;
    height: 2.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__inner {
    animation: none;
    transition: none;
  }
}