/* =============================================================
   有限会社スクーデリア / Corporate Site
   Editorial Monochrome — white base × dark accents
   Generous whitespace / oversized type / refined motion
   ============================================================= */

:root {
  /* Fonts */
  --font-ja: "Noto Sans JP", sans-serif;
  --font-ja-display: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  --font-en: "Inter", sans-serif;
  --font-en-display: "Poppins", "Inter", sans-serif;

  /* Weights */
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-bold: 700;
  --fw-black: 900;

  /* Monochrome palette */
  --color-ink: #0a0a0a;
  --color-ink-2: #141414;
  --color-bg: #ffffff;
  --color-white: #ffffff;
  --color-gray-dark: #555555;
  --color-gray: #8a8a8a;
  --color-gray-light: #b8b8b8;
  --color-gray-ex-light: #f4f4f2;
  --color-line: #e4e4e1;
  --color-line-dark: rgba(255, 255, 255, 0.16);

  /* Layout */
  --container: 1320px;
  --gutter: clamp(22px, 6vw, 80px);
  --section-y: clamp(96px, 14vw, 220px);
  --header-h: 84px;

  /* Sharp corners */
  --radius: 0px;

  /* Easing */
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quart: cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* ----------------------------- Reset ----------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-ja);
  font-weight: var(--fw-regular);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img,
picture,
svg { display: block; max-width: 100%; height: auto; }

ul,
ol { list-style: none; padding: 0; }

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.4s var(--ease-out-expo), opacity 0.4s var(--ease-out-expo);
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

h1, h2, h3 { line-height: 1.18; font-weight: var(--fw-black); }

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}

::selection { background: var(--color-ink); color: var(--color-white); }

/* ----------------------------- Helpers ----------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--color-ink);
  color: var(--color-white);
  padding: 12px 20px;
}
.skip-link:focus { left: 0; }

/* ----------------------------- Section heading ----------------------------- */
.section { padding-block: var(--section-y); }

.section-head { margin-bottom: clamp(48px, 7vw, 96px); }

.section-head__ja {
  font-family: var(--font-ja-display);
  font-size: clamp(2.1rem, 6vw, 4rem);
  font-weight: var(--fw-black);
  letter-spacing: 0.01em;
  line-height: 1.08;
}

.section-head__en {
  margin-top: 18px;
  font-family: var(--font-en-display);
  font-weight: var(--fw-bold);
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gray-dark);
  display: flex;
  align-items: center;
  gap: 16px;
}
.section-head__en::before {
  content: "";
  width: 48px;
  height: 1px;
  background: currentColor;
}

.section-head--invert .section-head__ja { color: var(--color-white); }
.section-head--invert .section-head__en { color: var(--color-gray-light); }

/* ----------------------------- Buttons ----------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 34px;
  min-height: 56px;
  font-family: var(--font-en);
  font-weight: var(--fw-bold);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  transition: background 0.45s var(--ease-out-expo), color 0.45s var(--ease-out-expo), transform 0.45s var(--ease-out-expo);
}
.btn span { transition: transform 0.4s var(--ease-out-expo); }
.btn:hover span { transform: translateX(5px); }

.btn--solid {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
}
.btn--solid:hover { background: var(--color-ink-2); transform: translateY(-2px); }

.btn--ghost {
  background: transparent;
  color: var(--color-ink);
}
.btn--ghost:hover { background: var(--color-ink); color: var(--color-white); }

.btn--lg {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  padding: 24px 44px;
  min-height: 68px;
}

/* On dark sections */
.hero .btn--solid,
.contact .btn--solid {
  background: var(--color-white);
  color: var(--color-ink);
  border-color: var(--color-white);
}
.hero .btn--solid:hover,
.contact .btn--solid:hover { background: var(--color-gray-ex-light); }
.hero .btn--ghost { color: var(--color-white); border-color: var(--color-line-dark); }
.hero .btn--ghost:hover { background: var(--color-white); color: var(--color-ink); border-color: var(--color-white); }

/* ============================================================
   Header (color-adaptive)
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  color: var(--color-white);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: color 0.5s var(--ease-out-expo), background 0.5s var(--ease-out-expo), border-color 0.5s var(--ease-out-expo);
}
.site-header.is-scrolled {
  color: var(--color-ink);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; }
.brand__logo {
  height: 28px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
  transition: filter 0.5s var(--ease-out-expo);
}
.site-header.is-scrolled .brand__logo { filter: none; }

.gnav__list {
  display: flex;
  align-items: center;
  gap: clamp(24px, 2.8vw, 48px);
  font-family: var(--font-en);
  font-weight: var(--fw-medium);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}
.gnav__list a {
  position: relative;
  padding-block: 4px;
}
.gnav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.45s var(--ease-out-expo);
}
.gnav__list a:hover::after { transform: scaleX(1); transform-origin: left; }

.gnav__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid currentColor;
  font-weight: var(--fw-bold);
}
.gnav__cta::after { display: none; }
.gnav__cta span { transition: transform 0.4s var(--ease-out-expo); }
.gnav__cta:hover span { transform: translateX(5px); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 7px;
  z-index: 110;
}
.nav-toggle__bar {
  display: block;
  width: 28px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.45s var(--ease-out-expo), opacity 0.3s var(--ease-out-expo);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(4.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { transform: translateY(-4.25px) rotate(-45deg); }

body.is-nav-open .site-header { color: var(--color-white); background: transparent; border-color: transparent; }
body.is-nav-open .brand__logo { filter: brightness(0) invert(1); }

/* Mobile nav panel */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 105;
  background: var(--color-ink);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--header-h) var(--gutter) 56px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease-out-expo), visibility 0.5s var(--ease-out-expo);
}
.mobile-nav.is-open { opacity: 1; visibility: visible; }

.mobile-nav__list {
  display: flex;
  flex-direction: column;
}
.mobile-nav__list a {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 18px 0;
  font-family: var(--font-en-display);
  font-weight: var(--fw-bold);
  font-size: clamp(1.9rem, 9vw, 2.8rem);
  border-bottom: 1px solid var(--color-line-dark);
}
.mobile-nav__num {
  font-size: 0.85rem;
  font-family: var(--font-en);
  color: var(--color-gray);
  letter-spacing: 0.1em;
}
.mobile-nav__foot {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-en);
  color: var(--color-gray-light);
  letter-spacing: 0.04em;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--color-white);
  background: var(--color-ink);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-color: var(--color-ink);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 30%, #000 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 100% 80% at 50% 30%, #000 25%, transparent 78%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(120px, 18vh, 200px);
}

.hero__tagline {
  font-family: var(--font-en-display);
  font-weight: var(--fw-medium);
  font-size: 0.85rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-gray-light);
  margin-bottom: clamp(28px, 4vw, 48px);
}

.hero__catch {
  font-family: var(--font-ja-display);
  font-weight: var(--fw-black);
  font-size: clamp(3rem, 13vw, 9rem);
  line-height: 1.02;
  letter-spacing: 0.005em;
}

.hero__lead {
  margin-top: clamp(32px, 4vw, 52px);
  max-width: 46ch;
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  font-weight: var(--fw-regular);
  color: var(--color-gray-light);
  line-height: 2;
}

.hero__actions {
  margin-top: clamp(40px, 5vw, 64px);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  a{
    width: 211px;
  }
}

/* Marquee */
.hero__marquee {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-line-dark);
  padding-block: 22px;
  overflow: hidden;
  white-space: nowrap;
}
.hero__marquee-track {
  display: inline-flex;
  animation: marquee 32s linear infinite;
  font-family: var(--font-en-display);
  font-weight: var(--fw-bold);
  font-size: clamp(0.85rem, 1.4vw, 1.05rem);
  letter-spacing: 0.2em;
  color: var(--color-gray);
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================================
   Services — editorial index list
   ============================================================ */
.svc-list { border-top: 1px solid var(--color-line); }
.svc-row {
  position: relative;
  display: grid;
  grid-template-columns: 88px minmax(0, 1.1fr) minmax(0, 1.2fr);
  align-items: center;
  gap: 24px;
  padding: clamp(28px, 4vw, 52px) 8px;
  border-bottom: 1px solid var(--color-line);
  transition: padding-inline 0.5s var(--ease-out-expo);
}
.svc-row::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-ink);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.5s var(--ease-out-expo);
  z-index: 0;
}
.svc-row:hover::before { transform: scaleY(1); transform-origin: top; }
.svc-row > * { position: relative; z-index: 1; transition: color 0.45s var(--ease-out-expo); }
.svc-row:hover > * { color: var(--color-white); }
/* .svc-row:hover { padding-inline: clamp(8px, 2vw, 28px); } */

.svc-row__num {
  font-family: var(--font-en-display);
  font-weight: var(--fw-bold);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--color-gray);
}
.svc-row__title {
  font-family: var(--font-ja-display);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: var(--fw-bold);
  line-height: 1.3;
}
.svc-row__desc {
  font-size: 0.96rem;
  color: var(--color-gray-dark);
  line-height: 1.9;
}
.svc-row:hover .svc-row__num,
.svc-row:hover .svc-row__desc { color: var(--color-gray-light); }

.svc-foot {
  margin-top: clamp(40px, 5vw, 64px);
  display: flex;
  justify-content: flex-start;
}

/* ============================================================
   About (dark)
   ============================================================ */
.about {
  background: var(--color-ink);
  color: var(--color-white);
}
.about__statement {
  font-family: var(--font-ja-display);
  font-weight: var(--fw-black);
  font-size: clamp(2.2rem, 6.4vw, 5rem);
  line-height: 1.32;
  letter-spacing: -0.07em;
  margin-bottom: clamp(48px, 7vw, 96px);
}
.about__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}
.about__label {
  font-family: var(--font-en-display);
  font-weight: var(--fw-bold);
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gray-light);
  padding-top: 10px;
}
.about__text {
  display: flex;
  flex-direction: column;
  gap: 28px;
  color: var(--color-gray-light);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 2.1;
}

/* ============================================================
   Flow
   ============================================================ */
.flow-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--color-line);
}
.flow-item {
  background: var(--color-bg);
  padding: clamp(30px, 3.4vw, 48px);
  display: flex;
  flex-direction: column;
  transition: background 0.45s var(--ease-out-expo);
}
.flow-item:hover { background: var(--color-gray-ex-light); }
.flow-item__num {
  font-family: var(--font-en-display);
  font-weight: var(--fw-black);
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1;
  color: var(--color-ink);
  margin-bottom: 28px;
}
.flow-item__title {
  font-family: var(--font-ja-display);
  font-size: 1.2rem;
  font-weight: var(--fw-bold);
  margin-bottom: 14px;
}
.flow-item__text {
  font-size: 0.92rem;
  color: var(--color-gray-dark);
  line-height: 1.9;
}

/* ============================================================
   Company
   ============================================================ */
.company__table-wrap { border-top: 1px solid var(--color-line); }
.company-table {
  width: 100%;
  border-collapse: collapse;
}
.company-table th,
.company-table td {
  text-align: left;
  vertical-align: top;
  padding: clamp(20px, 2.6vw, 32px) 8px;
  border-bottom: 1px solid var(--color-line);
  line-height: 1.85;
}
.company-table th {
  width: 30%;
  min-width: 132px;
  font-family: var(--font-ja-display);
  font-weight: var(--fw-bold);
  color: var(--color-ink);
}
.company-table td { color: var(--color-gray-dark); }
.company-table a {
  position: relative;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: left bottom;
  transition: background-size 0.45s var(--ease-out-expo), color 0.4s var(--ease-out-expo);
}
.company-table a:hover { color: var(--color-ink); background-size: 100% 1px; }

/* ============================================================
   Contact (dark)
   ============================================================ */
.contact {
  background: var(--color-ink);
  color: var(--color-white);
  text-align: center;
}
.contact__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.contact .section-head { margin-bottom: clamp(36px, 5vw, 64px); }
.contact .section-head__en { justify-content: center; }
.contact__lead {
  font-family: var(--font-ja-display);
  font-weight: var(--fw-bold);
  font-size: clamp(1.6rem, 4vw, 3rem);
  line-height: 1.5;
  margin-bottom: clamp(44px, 6vw, 72px);
}
.contact__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}
.contact__tel {
  font-family: var(--font-en-display);
  font-weight: var(--fw-bold);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--color-gray-light);
}
.contact__tel:hover { color: var(--color-white); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-ink-2);
  color: var(--color-gray-light);
  padding-top: clamp(56px, 8vw, 104px);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: clamp(48px, 7vw, 80px);
  border-bottom: 1px solid var(--color-line-dark);
}
.site-footer__logo {
  height: 30px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: 24px;
}
.site-footer__addr { font-size: 0.85rem; line-height: 2.1; }
.site-footer__addr a:hover { color: var(--color-white); }
.site-footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--font-en);
  font-weight: var(--fw-medium);
  letter-spacing: 0.05em;
}
.site-footer__nav a:hover { color: var(--color-white); }

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 32px;
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}
.site-footer__top span { display: inline-block; transition: transform 0.4s var(--ease-out-expo); }
.site-footer__top:hover { color: var(--color-white); }
.site-footer__top:hover span { transform: translateY(-4px); }

/* ============================================================
   Reveal — fade up
   ============================================================ */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 1s var(--ease-out-quart), transform 1s var(--ease-out-quart);
  will-change: opacity, transform;
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reveal — line mask (headings / statements) */
.line { display: block; overflow: hidden; }
.js [data-reveal-lines] .line__in {
  display: block;
  transform: translateY(110%);
  transition: transform 1.1s var(--ease-out-expo);
  will-change: transform;
}
.js [data-reveal-lines].is-visible .line__in { transform: translateY(0); }
.js [data-reveal-lines].is-visible .line:nth-child(2) .line__in { transition-delay: 0.09s; }
.js [data-reveal-lines].is-visible .line:nth-child(3) .line__in { transition-delay: 0.18s; }
.js [data-reveal-lines].is-visible .line:nth-child(4) .line__in { transition-delay: 0.27s; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .flow-list { grid-template-columns: repeat(2, 1fr); }
  .about__body { grid-template-columns: 1fr; row-gap: clamp(28px, 6vw, 48px); }
}

@media (max-width: 860px) {
  .svc-row {
    grid-template-columns: 64px 1fr;
    gap: 8px 20px;
  }
  .svc-row__desc { grid-column: 2; }
}

@media (max-width: 768px) {
  :root { --header-h: 68px; }

  .gnav { display: none; }
  .nav-toggle { display: flex; }
  body.is-nav-open { overflow: hidden; }

  .hero { justify-content: center; }
}

@media (max-width: 560px) {
  .flow-list { grid-template-columns: 1fr; }

  .svc-row { grid-template-columns: 1fr; gap: 10px; }
  .svc-row__num { order: -1; }
  .svc-row:hover { padding-inline: 8px; }

  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
    padding-inline: 0;
  }
  .company-table th { border-bottom: none; padding-bottom: 4px; }
  .company-table td { padding-top: 0; }

  .btn--lg { font-size: 0.95rem; padding: 18px 24px; width: 100%; justify-content: center; word-break: break-all; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .js [data-reveal-lines] .line__in { transform: none; }
  .hero__marquee-track { animation: none; }
}