/* ============================================================
   文才株式会社 コーポレートサイト
   ============================================================ */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, p, ul, li, blockquote, figure, address { margin: 0; padding: 0; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; cursor: pointer; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: auto; }

/* ---------- Design Tokens ---------- */
:root {
  --color-navy: #101B33;
  --color-navy-deep: #0A1122;
  --color-blue: #1E4FA0;
  --color-blue-light: #4F7FDB;
  --color-white: #FFFFFF;
  --color-offwhite: #F6F7FA;
  --color-text: #23283A;
  --color-text-soft: #5A6072;
  --color-border: #E4E6EC;

  --font-jp: 'Zen Old Mincho', 'Hiragino Mincho ProN', serif;

  --fs-body: clamp(14px, 0.85vw + 12px, 16px);
  --fs-small: clamp(12px, 0.6vw + 11px, 14px);

  --container-max: 1280px;
  --container-pad: 24px;

  --header-height: 84px;
  --transition-base: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 768px) {
  :root { --container-pad: 48px; }
}

/* ---------- Base ---------- */
body {
  font-family: var(--font-jp);
  font-weight: 600;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 900; line-height: 1.5; color: var(--color-navy); }

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

section[id] { scroll-margin-top: var(--header-height); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  background: var(--color-navy);
  color: var(--color-white);
  padding: 12px 20px;
  border-radius: 4px;
  z-index: 1000;
  transition: top 0.3s ease;
  font-weight: 700;
}
.skip-link:focus { top: 16px; }

.pc-only { display: none; }
@media (min-width: 768px) { .pc-only { display: inline; } }

.section-label {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-blue);
  margin-bottom: 16px;
}
.section-label--light { color: var(--color-blue-light); }

.section-heading { text-align: center; margin-bottom: 56px; }
.section-title {
  font-size: clamp(26px, 3.2vw, 40px);
  letter-spacing: 0.04em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 40px;
  font-weight: 700;
  font-size: var(--fs-body);
  border-radius: 999px;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}
.btn--primary {
  background: var(--color-white);
  color: var(--color-navy);
}
.btn--primary:hover { transform: translateY(-2px); background: var(--color-blue-light); color: var(--color-white); }
.btn--primary:focus-visible { outline: 3px solid var(--color-blue-light); outline-offset: 3px; }

/* fade-up base state (JS controls the animated reveal; this keeps content
   visible if JS fails to load) */
.fade-up { opacity: 1; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 200;
  height: var(--header-height);
  display: flex;
  align-items: center;
  --header-fg: #ffffff;
}
.site-header.is-scrolled {
  --header-fg: var(--color-navy);
}

/* 背景・ぼかしは専用レイヤーに分離する。
   backdrop-filter/transform等を.site-header自体に付けると、position:fixedの
   子要素(.site-nav)の基準位置(containing block)が書き換わり、
   スクロール時にドロワーの高さが正しく取れなくなるため。 */
.site-header__backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(255, 255, 255, 0);
  transition: background var(--transition-base), backdrop-filter var(--transition-base), box-shadow var(--transition-base);
  pointer-events: none;
}
.site-header.is-scrolled .site-header__backdrop {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 24px rgba(16, 27, 51, 0.08);
}

.site-header__logo img {
  filter: brightness(0) invert(1);
  transition: filter var(--transition-base);
}
.site-header.is-scrolled .site-header__logo img { filter: none; }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-header__logo img { height: 34px; width: auto; }
@media (min-width: 768px) { .site-header__logo img { height: 40px; } }

.nav-toggle {
  position: relative;
  z-index: 210;
  width: 32px;
  height: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--header-fg);
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(11px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }

.site-nav {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-white);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}
.site-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 32px var(--container-pad);
}
.site-nav__list li { border-bottom: 1px solid var(--color-border); }
.site-nav__list a {
  display: block;
  padding: 18px 4px;
  font-weight: 700;
  font-size: 18px;
}
.site-nav__cta { color: var(--color-blue); }

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    inset: auto;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    background: transparent;
  }
  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 40px;
    padding: 0;
  }
  .site-nav__list li { border-bottom: none; }
  .site-nav__list a {
    padding: 8px 2px;
    font-size: 15px;
    position: relative;
    color: var(--header-fg);
    transition: color var(--transition-base);
  }
  .site-nav__list a:not(.site-nav__cta)::after {
    content: '';
    position: absolute;
    left: 0; right: 100%;
    bottom: 0;
    height: 2px;
    background: var(--color-blue-light);
    transition: right var(--transition-base);
  }
  .site-nav__list a:not(.site-nav__cta):hover::after { right: 0; }
  .site-nav__cta {
    background: var(--color-navy);
    color: var(--color-white) !important;
    padding: 10px 24px;
    border-radius: 999px;
  }
  .site-nav__cta:hover { background: var(--color-blue); }
}

body.nav-open { overflow: hidden; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
  background: var(--color-navy);
}

.hero__columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  height: 100%;
  clip-path: inset(0% 0 0 0);
}

.hero__col {
  position: relative;
  overflow: hidden;
}

.hero__slide {
  position: absolute;
  inset: 0;
  transform: translateY(100%);
  will-change: transform;
}
.hero__slide:first-child { transform: translateY(0%); z-index: 2; }

.hero__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(180deg, rgba(10, 17, 34, 0.45) 0%, rgba(10, 17, 34, 0.35) 45%, rgba(10, 17, 34, 0.6) 100%);
  pointer-events: none;
}

.hero__content { pointer-events: auto; color: var(--color-white); }

.hero__eyebrow {
  font-size: var(--fs-small);
  letter-spacing: 0.3em;
  font-weight: 700;
  margin-bottom: 20px;
  opacity: 0.9;
}

.hero__title {
  color: var(--color-white);
  font-size: clamp(28px, 6vw, 56px);
  letter-spacing: 0.03em;
  margin-bottom: 20px;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
}

.hero__lead {
  font-size: var(--fs-body);
  font-weight: 600;
  margin-bottom: 36px;
  opacity: 0.92;
}

@media (max-width: 767px) {
  .hero { min-height: 620px; }
  .hero__eyebrow { letter-spacing: 0.2em; }
  .hero__lead br { display: none; }
}

/* ============================================================
   About / Concept
   ============================================================ */
.about {
  position: relative;
  padding: 120px 0;
  overflow: hidden;
  text-align: center;
}

.about__decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.about__watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(240px, 40vw, 620px);
  font-weight: 900;
  color: var(--color-offwhite);
  line-height: 1;
  user-select: none;
  z-index: 0;
}
.about__dot {
  position: absolute;
  border-radius: 50%;
  background: var(--color-blue-light);
  opacity: 0.16;
}
.about__dot--1 { width: 140px; height: 140px; top: 12%; left: 8%; }
.about__dot--2 { width: 90px; height: 90px; bottom: 14%; right: 10%; background: var(--color-navy); }
.about__dot--3 { width: 56px; height: 56px; top: 68%; left: 18%; background: var(--color-blue); }

.about__inner { position: relative; z-index: 1; max-width: 780px; }

.about__quote { margin-bottom: 32px; }
.about__quote-mark {
  display: block;
  font-size: 64px;
  color: var(--color-blue-light);
  line-height: 1;
  margin-bottom: 8px;
  font-family: Georgia, serif;
}
.about__statement {
  font-size: clamp(20px, 2.6vw, 32px);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.6;
}
.about__statement strong { color: var(--color-blue); font-weight: 900; }

.about__body {
  color: var(--color-text-soft);
  font-size: var(--fs-body);
  font-weight: 600;
  text-align: left;
  max-width: 640px;
  margin-inline: auto;
}

@media (max-width: 767px) {
  .about { padding: 88px 0; }
}

/* ============================================================
   Services
   ============================================================ */
.services { padding: 100px 0; background: var(--color-offwhite); }

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

@media (min-width: 768px) {
  .services__grid { grid-template-columns: repeat(3, 1fr); gap: 40px; }
}

.service-card { text-align: left; }

.img-mask {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  background: var(--color-navy);
}
.img-mask img { width: 100%; height: 100%; object-fit: cover; }

.service-card__image { aspect-ratio: 4 / 3; margin-bottom: 24px; }

.service-card__label {
  font-size: var(--fs-small);
  letter-spacing: 0.12em;
  color: var(--color-blue);
  font-weight: 700;
  margin-bottom: 8px;
}

.service-card__title {
  font-size: clamp(18px, 1.6vw, 22px);
  margin-bottom: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.service-card__desc { color: var(--color-text-soft); }

/* ============================================================
   Works
   ============================================================ */
.works { padding: 100px 0; }

.works__title {
  font-size: clamp(36px, 6vw, 64px);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.works__subtitle {
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 28px;
}

.works__lead {
  color: var(--color-text-soft);
  max-width: 640px;
  margin-bottom: 56px;
}

.works__list { display: flex; flex-direction: column; gap: 40px; }

.work-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.work-item__tag {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--color-blue);
  letter-spacing: 0.05em;
}

.work-item__thumb { aspect-ratio: 16 / 9; }

.work-item__title {
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .work-item {
    grid-template-columns: 140px minmax(0, 360px) 1fr;
    align-items: center;
    gap: 32px;
  }
  .work-item__tag { grid-column: 1; }
  .work-item__thumb { grid-column: 2; }
  .work-item__title { grid-column: 3; }
}

/* ============================================================
   Company
   ============================================================ */
.company { padding: 100px 0; background: var(--color-offwhite); }

.company__table {
  max-width: 720px;
  margin-inline: auto;
  border-top: 1px solid var(--color-border);
}

.company__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.company__row dt {
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.04em;
}

.company__row dd {
  color: var(--color-text-soft);
  line-height: 1.8;
}
.company__row dd a:hover { color: var(--color-blue); }

@media (min-width: 768px) {
  .company__row {
    grid-template-columns: 160px 1fr;
    gap: 24px;
    align-items: baseline;
  }
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  background: var(--color-navy);
  padding: 100px 0;
  text-align: center;
  color: var(--color-white);
}

.cta__title {
  color: var(--color-white);
  font-size: clamp(26px, 3.4vw, 38px);
  margin-bottom: 20px;
}

.cta__desc {
  color: rgba(255, 255, 255, 0.78);
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: 40px;
}

.cta__tel {
  display: block;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--color-white);
  margin-bottom: 48px;
  transition: color var(--transition-base);
}
.cta__tel:hover { color: var(--color-blue-light); }

.cta__mail-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: space-between;
  max-width: 560px;
  margin-inline: auto;
  padding: 22px 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  text-align: left;
  transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}
.cta__mail-bar:hover { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.32); transform: translateY(-2px); }
.cta__mail-label { font-weight: 700; white-space: nowrap; }
.cta__mail-desc { color: rgba(255, 255, 255, 0.7); font-size: var(--fs-small); flex: 1; }
.cta__mail-arrow { font-size: 20px; }

@media (max-width: 767px) {
  .cta__mail-bar { flex-wrap: wrap; }
  .cta__mail-desc { flex-basis: 100%; }
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-navy-deep);
  color: rgba(255, 255, 255, 0.72);
  padding: 56px 0 32px;
  text-align: center;
}

.site-footer__logo { margin-inline: auto; margin-bottom: 24px; filter: brightness(0) invert(1); opacity: 0.92; }

.site-footer__info p { margin-bottom: 8px; font-size: var(--fs-small); }
.site-footer__info a:hover { color: var(--color-blue-light); }

.site-footer__copyright {
  margin-top: 32px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.4);
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}