/* =========================================================
   SOLICIO — Base / Components
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-text);
  background: var(--c-base);
  font-feature-settings: "palt" 1;     /* 和文の詰め */
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; padding: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: 0.01em;
  text-wrap: pretty;
}

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

.section { padding-block: var(--section-y); }
[id] { scroll-margin-top: calc(var(--header-h) + 18px); }
.section--alt { background: var(--c-bg-alt); }
.section--tint { background: var(--c-primary-light); }

/* ---------- Eyebrow / Section head ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-en);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-primary);
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px; background: var(--c-primary); opacity: 0.6;
}
.eyebrow--center { justify-content: center; }

.sec-head { max-width: 800px; }
.sec-head--center { margin-inline: auto; text-align: center; }
.sec-head__title {
  font-size: var(--fs-h2);
  margin-top: 18px;
  letter-spacing: 0.015em;
  text-wrap: balance;
}
.sec-head__lead {
  margin-top: 22px;
  color: var(--c-subtext);
  font-size: var(--fs-lead);
  line-height: var(--lh-lead);
  font-weight: 400;
}

.accent { color: var(--c-primary); }

/* PC専用の改行。スマホ（1カラム化する680px以下）では改行を無効化する */
@media (max-width: 680px) { .br-pc { display: none; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 16px 30px;
  border-radius: var(--r-pill);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  line-height: 1.4;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: normal;
  max-width: 100%;
  text-align: center;
}
.btn__arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--primary { background: var(--c-primary); color: #fff; box-shadow: var(--sh-md); }
.btn--primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: var(--sh-lg); }

.btn--ghost { background: #fff; color: var(--c-text); border: 1px solid var(--c-border); }
.btn--ghost:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-2px); }

.btn--on-dark { background: #fff; color: var(--c-primary-dark); }
.btn--on-dark:hover { background: var(--c-primary-light); transform: translateY(-2px); }

.btn--lg { padding: 19px 40px; font-size: 1rem; }
.btn--block { width: 100%; }

.textlink {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--c-primary); font-weight: 600; font-family: var(--font-heading);
  font-size: var(--fs-small);
}
.textlink svg { transition: transform var(--dur) var(--ease); }
.textlink:hover svg { transform: translateX(4px); }

/* ---------- Header ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(255,255,255,0);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), height var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.header.is-stuck {
  background: rgba(255,255,255,0.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--c-border-soft);
  box-shadow: var(--sh-sm);
}
.header__inner { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.header__logo img { height: 46px; width: auto; }
.header__nav { display: flex; align-items: center; gap: 4px; }
.header__nav a {
  padding: 10px 14px; font-size: var(--fs-small); font-weight: 500; color: var(--c-text);
  border-radius: var(--r-pill); white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.header__nav a:hover { color: var(--c-primary); background: var(--c-primary-light); }
.header__nav a.is-current { color: var(--c-primary); background: var(--c-primary-light); font-weight: 700; }
.header__actions { display: flex; align-items: center; gap: 12px; }
.header__cta { padding: 12px 22px; }

.nav-toggle { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: var(--r-sm); }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--c-text); position: relative; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; width: 22px; height: 2px; background: var(--c-text); transition: transform var(--dur) var(--ease); }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Mobile drawer ---------- */
.mobile-nav {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 90;
  background: #fff; padding: 32px var(--gutter) 48px;
  display: flex; flex-direction: column; gap: 6px;
  transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
body.nav-open .mobile-nav { opacity: 1; transform: translateY(0); pointer-events: auto; }
.mobile-nav a { padding: 16px 6px; font-family: var(--font-heading); font-size: 1.15rem; font-weight: 600; border-bottom: 1px solid var(--c-border-soft); }
.mobile-nav a.is-current { color: var(--c-primary); }
.mobile-nav .btn { margin-top: 24px; }
.mobile-nav__divider { height: 1px; background: var(--c-border); margin: 18px 0 6px; }
.mobile-nav__label { font-family: var(--font-en); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--c-text-faint); padding: 6px 6px 2px; }
.mobile-nav a.mobile-nav__sub { font-family: var(--font-body); font-size: 1rem; font-weight: 500; padding: 13px 6px; color: var(--c-subtext); border-bottom: 1px solid var(--c-border-soft); }
.mobile-nav a.mobile-nav__sub:hover { color: var(--c-primary); }

/* ---------- Side floating in-page nav ---------- */
.side-nav {
  position: fixed; right: clamp(14px, 1.6vw, 28px); top: 50%; transform: translateY(-50%);
  z-index: 80; display: flex; flex-direction: column; gap: 2px; align-items: flex-end;
}
.side-nav__item {
  position: relative; display: flex; align-items: center; justify-content: flex-end;
  padding: 8px 0; color: var(--c-text-faint);
}
.side-nav__label {
  position: absolute; right: 100%; margin-right: 14px; white-space: nowrap;
  font-family: var(--font-en); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em;
  color: var(--c-text); background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--r-pill); padding: 4px 12px; box-shadow: var(--sh-md);
  opacity: 0; transform: translateX(6px); pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.side-nav__tick {
  width: 22px; height: 2px; border-radius: 2px; background: currentColor; flex-shrink: 0;
  transition: width var(--dur) var(--ease), background var(--dur) var(--ease);
}
.side-nav__item:hover { color: var(--c-text); }
.side-nav__item:hover .side-nav__label { opacity: 1; transform: none; }
.side-nav__item.is-active { color: var(--c-primary); }
.side-nav__item.is-active .side-nav__tick { width: 34px; background: var(--c-primary); }
@media (max-width: 1200px) { .side-nav { display: none; } }

/* ---------- Logo marquee ---------- */
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee__track { display: flex; width: max-content; gap: 64px; animation: marquee 34s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__item { display: flex; align-items: center; gap: 12px; color: var(--c-subtext); font-family: var(--font-heading); font-weight: 600; font-size: 1.1rem; letter-spacing: 0.02em; white-space: nowrap; }
.marquee__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--c-primary); opacity: 0.55; }
@keyframes marquee { to { transform: translateX(calc(-50% - 32px)); } }
@media (prefers-reduced-motion: reduce) { .marquee__track { animation: none; flex-wrap: wrap; justify-content: center; } }

/* ---------- Footer ---------- */
.footer { background: var(--c-primary-dark); color: #fff; padding-block: clamp(56px, 7vw, 88px) 40px; }
.footer a { color: rgba(255,255,255,0.78); transition: color var(--dur) var(--ease); }
.footer a:hover { color: #fff; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px 40px; }
.footer__brand img { height: 30px; width: auto; margin-bottom: 22px; }
.footer__brand p { color: rgba(255,255,255,0.7); font-size: var(--fs-small); line-height: 1.9; max-width: 30ch; }
.footer__col h4 { font-size: var(--fs-small); letter-spacing: 0.08em; margin-bottom: 18px; color: rgba(255,255,255,0.95); }
.footer__col li { margin-bottom: 12px; font-size: var(--fs-small); }
.footer__bottom { margin-top: clamp(48px, 6vw, 72px); padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.16); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer__bottom small { color: rgba(255,255,255,0.6); font-size: 0.8125rem; letter-spacing: 0.02em; }
.footer__legal { display: flex; gap: 24px; font-size: 0.8125rem; }

/* さり気ない制作クレジット（AI業務基盤の強みと地続き） */
.footer__made { margin-top: 18px; font-size: 0.78rem; color: rgba(255,255,255,0.48); letter-spacing: 0.02em; line-height: 1.7; }
.footer__made svg { width: 13px; height: 13px; color: rgba(255,255,255,0.6); vertical-align: -1px; margin-right: 6px; }
.footer__made b { font-weight: 600; color: rgba(255,255,255,0.72); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- Variant visibility ---------- */
[data-variant] { display: none; }
:root[data-fv="a"]       [data-variant="fv-a"],
:root[data-fv="b"]       [data-variant="fv-b"],
:root[data-fv="c"]       [data-variant="fv-c"],
:root[data-services="a"] [data-variant="services-a"],
:root[data-services="b"] [data-variant="services-b"],
:root[data-strengths="a"] [data-variant="strengths-a"],
:root[data-strengths="b"] [data-variant="strengths-b"] { display: block; }

/* ---------- Responsive (base) ---------- */
@media (max-width: 920px) {
  .header__nav, .header__actions .btn { display: none; }
  .nav-toggle { display: flex; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr; gap: 36px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}