/* ============================================================
   BCOOL Global CSS
   design-system/colors_and_type.css を先に読み込むこと
============================================================ */

/* --- フォントスケール変数 --- */
:root { --bc-fz-scale: 1; }
html[data-font="-1"] { --bc-fz-scale: 0.875; }
html[data-font="1"]  { --bc-fz-scale: 1.125; }
html[data-font="2"]  { --bc-fz-scale: 1.25; }

/* --- 流体タイポグラフィ --- */
html { font-size: 16px; scroll-behavior: smooth; }
/* 大画面: 1454px以上でフォントが拡大、1920pxで約20px */
@media screen and (min-width: 1240px) {
  html { font-size: calc(clamp(16px, 1.1vw, 20px) * var(--bc-fz-scale)); }
}

/* --- フォントサイズコントロール (PC only) --- */
.font-ctrl {
  position: fixed;
  bottom: 28px;
  right: 28px;
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(5,11,24,0.82);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  padding: 5px 10px;
  z-index: 9000;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0.55;
  transition: opacity 0.2s;
}
.font-ctrl:hover { opacity: 1; }
.font-ctrl__btn {
  background: none;
  border: none;
  cursor: pointer;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  padding: 3px 7px;
  border-radius: 999px;
  line-height: 1;
  transition: background 0.15s, color 0.15s;
  letter-spacing: 0;
}
.font-ctrl__btn:hover { background: rgba(255,255,255,0.15); }
.font-ctrl__btn--reset { font-size: 11px; color: rgba(255,255,255,0.5); padding: 3px 5px; }
.font-ctrl__sep { width: 1px; height: 14px; background: rgba(255,255,255,0.2); margin: 0 2px; }
@media (max-width: 1023px) { .font-ctrl { display: none; } }
@media screen and (max-width: 1239px) and (min-width: 768px) {
  html { font-size: calc(16 / 1240 * 100vw); }
}
@media screen and (max-width: 767px) {
  html { font-size: calc(16 / 375 * 100vw); }
}

/* --- グローバルエイリアス --- */
:root {
  --header-h: 72px;
  --section-pad: 120px 0;
  --content-w: clamp(1240px, 88vw, 1600px);
  --content-pad: 0 var(--bc-sp-10);
  --transition: var(--bc-dur) var(--bc-ease-out);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* --- コンテナ --- */
.container {
  width: 100%;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: var(--content-pad);
}
.container--narrow {
  width: 100%;
  max-width: var(--bc-container-narrow);
  margin: 0 auto;
  padding: var(--content-pad);
}

/* --- タイポグラフィクラス --- */
.en-hero    { font-family: var(--bc-font-display); font-weight: var(--bc-w-black); font-size: clamp(calc(3rem * var(--bc-fz-scale)), calc(8vw * var(--bc-fz-scale)), calc(6rem * var(--bc-fz-scale))); letter-spacing: var(--bc-tracking-tight); line-height: var(--bc-lh-tight); }
.en-heading { font-family: var(--bc-font-display); font-weight: var(--bc-w-black); font-size: clamp(calc(1.75rem * var(--bc-fz-scale)), calc(4vw * var(--bc-fz-scale)), calc(3rem * var(--bc-fz-scale))); letter-spacing: var(--bc-tracking-tight); line-height: var(--bc-lh-tight); }
.en-label   { font-family: var(--bc-font-en); font-size: 0.75rem; font-weight: var(--bc-w-bold); letter-spacing: var(--bc-tracking-caps); text-transform: uppercase; color: var(--bc-brand); }
.ja-heading { font-family: var(--bc-font-body); font-weight: var(--bc-w-bold); font-size: clamp(calc(1.375rem * var(--bc-fz-scale)), calc(3vw * var(--bc-fz-scale)), calc(1.875rem * var(--bc-fz-scale))); line-height: var(--bc-lh-snug); }
.ja-body    { font-family: var(--bc-font-body); font-size: calc(1rem * var(--bc-fz-scale)); line-height: 2.1; }

/* --- ボタン --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--bc-font-body); font-size: 1rem; font-weight: var(--bc-w-medium);
  padding: 14px 28px; border-radius: var(--bc-radius);
  background: var(--bc-brand); color: #fff;
  border: 2px solid var(--bc-brand);
  cursor: pointer; transition: var(--transition);
  white-space: nowrap;
}
.btn:hover { background: var(--bc-brand-hover); border-color: var(--bc-brand-hover); }
.btn--sm  { font-size: 0.8rem; padding: 10px 20px; }
.btn--lg  { font-size: 1.2rem; padding: 18px 40px; }
.btn--outline { background: transparent; color: var(--bc-brand); }
.btn--outline:hover { background: var(--bc-brand); color: #fff; }
.btn--white { background: #fff; color: var(--bc-ink-900); border-color: #fff; }
.btn--white:hover { background: var(--bc-paper-2); border-color: var(--bc-paper-2); }

/* --- セクション --- */
.section { padding: var(--section-pad); }
.section--dark { background: var(--bc-ink-950); color: var(--bc-paper); }
.section--subtle { background: var(--bc-paper-2); }
.section__eyebrow { margin-bottom: var(--bc-sp-4); }
.section__heading { margin-top: var(--bc-sp-3); margin-bottom: var(--bc-sp-6); }
.section__lead { color: var(--bc-fg-muted); max-width: 640px; margin-bottom: var(--bc-sp-12); }

/* --- フェードイン --- */
.fi { opacity: 0; transform: translateY(24px); transition: opacity 0.8s ease, transform 0.8s ease; }
.fi.visible { opacity: 1; transform: translateY(0); }
.fi-d1 { transition-delay: 0.1s; }
.fi-d2 { transition-delay: 0.2s; }
.fi-d3 { transition-delay: 0.3s; }
.fi-d4 { transition-delay: 0.4s; }

/* ============================================================
   HEADER
============================================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  transition: background var(--bc-dur-slow) var(--bc-ease-out), backdrop-filter var(--bc-dur-slow) var(--bc-ease-out);
}
.site-header.is-scrolled {
  background: rgba(5, 11, 24, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.site-header__inner {
  padding: 0 clamp(var(--bc-sp-6), 4vw, var(--bc-sp-16));
  height: 100%; display: flex; align-items: center; gap: var(--bc-sp-8);
}
.site-header__logo { flex-shrink: 0; }
.site-header__logo img { height: 36px; width: auto; }
.site-header__nav { display: flex; align-items: center; gap: var(--bc-sp-8); margin-left: auto; }
.site-header__nav-link {
  font-family: var(--bc-font-en); font-size: 0.8125rem; font-weight: var(--bc-w-bold);
  letter-spacing: 0.08em; color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}
.site-header__nav-link:hover,
.site-header__nav-link.is-active { color: #fff; }
.site-header__cta { margin-left: var(--bc-sp-4); }
.site-header__burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; position: relative; z-index: 1002; }
.site-header__burger span { display: block; width: 22px; height: 2px; background: #fff; transition: transform 0.3s ease, opacity 0.3s ease; border-radius: 2px; }
.site-header__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header__burger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.site-header__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* モバイルメニュー（フルスクリーンオーバーレイ） */
.site-header__mobile {
  position: fixed;
  inset: 0;
  background: var(--bc-ink-950);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px var(--bc-sp-8) var(--bc-sp-8);
  gap: 0;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.35s var(--bc-ease-out), visibility 0.35s, transform 0.35s var(--bc-ease-out);
}
.site-header__mobile.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 閉じるボタン */
.site-header__mobile-close {
  position: absolute;
  top: 18px;
  right: var(--bc-sp-4);
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 8px;
  line-height: 1;
  transition: color 0.2s ease;
}
.site-header__mobile-close:hover { color: #fff; }

/* メインリンク */
.site-header__mobile-link {
  font-family: var(--bc-font-display);
  font-size: clamp(1.75rem, 7vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: rgba(255,255,255,0.85);
  padding: var(--bc-sp-3) 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  text-decoration: none;
  display: block;
  opacity: 0;
  transform: translateY(10px);
  transition: color 0.2s ease, padding-left 0.2s ease, opacity 0.35s ease, transform 0.35s ease;
}
.site-header__mobile.is-open .site-header__mobile-link { opacity: 1; transform: translateY(0); }
.site-header__mobile.is-open > .site-header__mobile-link:nth-child(2) { transition-delay: 0.04s; }
.site-header__mobile.is-open > .site-header__mobile-link:nth-child(3) { transition-delay: 0.08s; }
.site-header__mobile.is-open .site-header__mobile-group:nth-child(4) .site-header__mobile-link { transition-delay: 0.12s; }
.site-header__mobile.is-open > .site-header__mobile-link:nth-child(5) { transition-delay: 0.16s; }
.site-header__mobile.is-open > .site-header__mobile-link:nth-child(6) { transition-delay: 0.2s; }
.site-header__mobile.is-open > .site-header__mobile-link:nth-child(7) { transition-delay: 0.24s; }
.site-header__mobile.is-open > .site-header__mobile-link:nth-child(8) { transition-delay: 0.28s; }
.site-header__mobile-link:hover { color: #fff; padding-left: var(--bc-sp-2); }

/* SERVICEグループ */
.site-header__mobile-group { border-bottom: 1px solid rgba(255,255,255,0.06); }
.site-header__mobile-toggle {
  display: flex;
  align-items: center;
}
.site-header__mobile-toggle .site-header__mobile-link {
  border-bottom: none;
  flex: 1;
}
.site-header__mobile-arrow {
  background: none;
  border: none;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  cursor: pointer;
  padding: var(--bc-sp-3) var(--bc-sp-2);
  transition: transform 0.3s ease, color 0.2s ease;
  flex-shrink: 0;
}
.site-header__mobile-arrow:hover { color: #fff; }
.site-header__mobile-toggle.is-open .site-header__mobile-arrow {
  transform: rotate(180deg);
  color: var(--bc-brand);
}

/* サブナビ（アコーディオン） */
.site-header__mobile-sub {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s var(--bc-ease-out);
  overflow: hidden;
}
.site-header__mobile-sub.is-open {
  grid-template-rows: 1fr;
}
.site-header__mobile-sub-inner { overflow: hidden; }
.site-header__mobile-sub-inner {
  display: flex;
  flex-direction: column;
  padding: var(--bc-sp-2) 0 var(--bc-sp-4) var(--bc-sp-3);
}
.site-header__mobile-sub-link {
  font-size: clamp(0.95rem, 3.5vw, 1.1rem);
  font-weight: 600;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  padding: var(--bc-sp-3) 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  white-space: nowrap;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.site-header__mobile-sub-link:last-child { border-bottom: none; }
.site-header__mobile-sub-link:hover { color: rgba(255,255,255,0.85); padding-left: var(--bc-sp-2); }

/* フッターエリア */
.site-header__mobile-footer {
  display: flex;
  flex-direction: column;
  gap: var(--bc-sp-4);
  margin-top: var(--bc-sp-6);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease 0.32s, transform 0.35s ease 0.32s;
}
.site-header__mobile.is-open .site-header__mobile-footer { opacity: 1; transform: translateY(0); }
.site-header__mobile-cta { align-self: flex-start; }
.site-header__mobile-policy {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  text-decoration: none;
  transition: color 0.2s ease;
}
.site-header__mobile-policy:hover { color: rgba(255,255,255,0.6); }

@media (max-width: 900px) {
  .site-header__nav, .site-header__cta { display: none; }
  .site-header__burger { display: flex; margin-left: auto; }
  .site-header { height: auto; }
  .site-header__inner { height: 64px; }
}

/* ============================================================
   FOOTER
============================================================ */
.site-footer {
  background: var(--bc-ink-950);
  color: var(--bc-fg-muted);
  padding: var(--bc-sp-20) 0 var(--bc-sp-10);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.site-footer__inner {
  max-width: var(--content-w); margin: 0 auto;
  padding: 0 var(--bc-sp-10);
  display: grid; gap: var(--bc-sp-10);
}
.site-footer__logo { opacity: 0.9; height: 28px; width: auto; max-width: none; }
.site-footer__tagline { font-family: var(--bc-font-en); font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--bc-fg-subtle); margin-top: var(--bc-sp-3); }
.site-footer__nav { display: flex; flex-wrap: wrap; gap: var(--bc-sp-4) var(--bc-sp-8); }
.site-footer__nav a { font-family: var(--bc-font-en); font-size: 0.8rem; letter-spacing: 0.08em; color: var(--bc-fg-muted); transition: color var(--transition); }
.site-footer__nav a:hover { color: var(--bc-paper); }
.site-footer__sns { display: flex; gap: var(--bc-sp-5); }
.site-footer__sns a { color: var(--bc-fg-muted); transition: color var(--transition); }
.site-footer__sns a:hover { color: var(--bc-brand); }
.site-footer__info { font-size: 0.8rem; line-height: 1.8; }
.site-footer__copy { font-size: 0.75rem; color: var(--bc-fg-subtle); }

/* ============================================================
   PAGE HERO（各ページ共通）
============================================================ */
.page-hero {
  padding: calc(var(--header-h) + 80px) 0 80px;
  background: var(--bc-ink-950);
  color: var(--bc-paper);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero__wave-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   CARD GRID
============================================================ */
.card-grid { display: grid; gap: 16px; }
.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .card-grid--3, .card-grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .card-grid--3, .card-grid--4 { grid-template-columns: 1fr; } }

/* ============================================================
   WORKS CARD
============================================================ */
.works-card { position: relative; aspect-ratio: 4/3; overflow: hidden; cursor: pointer; background: var(--bc-paper); }
.works-card__img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.6s var(--bc-ease-out); }
.works-card:hover .works-card__img { transform: scale(1.05); }
.works-card__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(5,11,24,0.85) 0%, transparent 60%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--bc-sp-5); opacity: 0; transition: opacity var(--transition);
}
.works-card:hover .works-card__overlay { opacity: 1; }
.works-card__cats { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: var(--bc-sp-2); }
.works-card__cat {
  font-family: var(--bc-font-en); font-size: 0.65rem; font-weight: var(--bc-w-bold);
  letter-spacing: 0.1em; text-transform: uppercase;
  background: var(--bc-brand); color: #fff;
  padding: 3px 8px; border-radius: var(--bc-radius-xs);
}
.works-card__title { font-size: 0.9rem; font-weight: var(--bc-w-bold); color: #fff; line-height: 1.4; }

/* ============================================================
   CTA SECTION
============================================================ */
.cta-section {
  background: var(--bc-brand); color: #fff;
  text-align: center; padding: 80px var(--bc-sp-10);
}
.cta-section .container--narrow {
  display: flex; flex-direction: column; align-items: center;
}
.cta-section__heading { font-family: var(--bc-font-display); font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: var(--bc-w-black); margin-bottom: var(--bc-sp-4); }
.cta-section__lead { font-size: 1rem; opacity: 0.9; margin-bottom: var(--bc-sp-8); }

/* ── ソリューションリスト（Our Solutions スタイル） ── */
.solutions-list {
  border-top: 1px solid var(--bc-ink-200);
}
.solution-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid var(--bc-ink-200);
  text-decoration: none;
  color: inherit;
  transition: background 0.18s;
}
.solution-item:hover { background: var(--bc-paper-2); }
.solution-item--dark { border-bottom-color: rgba(255,255,255,0.08); }
.solution-item--dark:hover { background: rgba(255,255,255,0.04); }
.solution-item__problem {
  padding: var(--bc-sp-10) var(--bc-sp-10) var(--bc-sp-10) 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid var(--bc-ink-200);
}
.solution-item--dark .solution-item__problem {
  border-right-color: rgba(255,255,255,0.08);
}
.solution-item__tag {
  font-family: var(--bc-font-en);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--bc-brand);
  margin-bottom: var(--bc-sp-3);
  display: block;
}
.solution-item__problem-text {
  font-family: var(--bc-font-body);
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--bc-fg);
  letter-spacing: -0.01em;
}
.solution-item--dark .solution-item__problem-text { color: rgba(255,255,255,0.55); }
.solution-item__service {
  padding: var(--bc-sp-10) 0 var(--bc-sp-10) var(--bc-sp-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--bc-sp-3);
}
.solution-item__en {
  font-family: var(--bc-font-en);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--bc-fg-muted);
  text-transform: uppercase;
}
.solution-item--dark .solution-item__en { color: rgba(255,255,255,0.35); }
.solution-item__name {
  font-family: var(--bc-font-body);
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-weight: 800;
  color: var(--bc-fg);
  line-height: 1.3;
}
.solution-item--dark .solution-item__name { color: var(--bc-paper); }
.solution-item__desc {
  font-size: 0.875rem;
  color: var(--bc-fg-muted);
  line-height: 1.75;
  max-width: 36em;
}
.solution-item--dark .solution-item__desc { color: rgba(255,255,255,0.5); }
.solution-item__cta {
  font-family: var(--bc-font-en);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--bc-brand);
  margin-top: var(--bc-sp-2);
  display: flex;
  align-items: center;
  gap: 0.4em;
  transition: gap 0.15s;
}
.solution-item:hover .solution-item__cta { gap: 0.7em; }
@media (max-width: 768px) {
  .solution-item { grid-template-columns: 1fr; }
  .solution-item__problem {
    padding: var(--bc-sp-6) 0 var(--bc-sp-4);
    border-right: none;
    border-bottom: 1px solid var(--bc-ink-200);
  }
  .solution-item--dark .solution-item__problem { border-bottom-color: rgba(255,255,255,0.08); }
  .solution-item__service { padding: var(--bc-sp-4) 0 var(--bc-sp-6); }
}