/* =========================================================================
   三交設備株式会社 コーポレートサイト — 共通スタイル
   デザイントークンは docs/design-reference.md を参照
   ========================================================================= */

:root {
  /* Colors */
  --navy:          #0d2740;  /* メインダークネイビー */
  --navy-deep:     #0a2138;  /* フッター背景 */
  --navy-mid:      #16527f;  /* グラデーション用ミドルブルー */
  --blue:          #15639e;  /* プライマリブルー */
  --blue-hover:    #0d4f82;  /* プライマリブルー hover */
  --blue-accent:   #2e8fcf;  /* アクセントブルー */
  --blue-accent-h: #3ba0e0;  /* アクセントブルー hover */
  --blue-light:    #7fc4f0;  /* ライトブルー（ダーク背景上） */
  --pale-1:        #cfe3f1;
  --pale-2:        #cfe0ee;
  --pale-3:        #cdd9e3;
  --bg-tint:       #eef5fa;  /* 薄いブルー背景 */
  --bg-tint-2:     #f6fafd;  /* さらに薄いブルー背景 */

  --ink:           #16242f;  /* 本文デフォルト */
  --ink-1:         #43586a;
  --ink-2:         #52677a;
  --ink-3:         #26384a;
  --muted-1:       #6a7d8c;
  --muted-2:       #90a1ae;
  --muted-3:       #9fb2c2;
  --muted-4:       #6f8294;

  --border:        #e2ecf3;
  --border-input:  #d7e3ec;

  --error:         #d4543a;
  --success:       #1d7a45;
  --success-bg:    #eef9f1;
  --success-border:#bfe0c9;

  /* Layout */
  --maxw:          1200px;
  --pad-x:         32px;

  --radius-card:   18px;
  --radius-sm:     14px;
  --shadow-card:   0 6px 24px rgba(13, 39, 64, .05);
  --shadow-card-h: 0 14px 40px rgba(13, 39, 64, .12);

  --header-h:      74px;

  --font-head: 'Zen Kaku Gothic New', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;

  /* Placeholder stripe (画像未差し替え時のフォールバック) */
  --stripe: repeating-linear-gradient(45deg, #e4eef6 0, #e4eef6 12px, #dae7f1 12px, #dae7f1 24px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  line-height: 1.8;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.35;
  letter-spacing: .01em;
}

img { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

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

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Layout helpers ---------------------------------------------------- */
.page { min-height: 100vh; display: flex; flex-direction: column; background: #fff; }
.main { flex: 1; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }
.page-enter { animation: fadeUp .5s ease both; }

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--blue-accent);
}
.eyebrow--light { color: var(--blue-light); }
.eyebrow--center { text-align: center; }

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  border-radius: 999px;
  transition: background .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.btn--primary { padding: 15px 30px; background: var(--blue); color: #fff; font-size: 15px; }
.btn--primary:hover { background: var(--blue-hover); }
.btn--accent { padding: 15px 30px; background: var(--blue-accent); color: #fff; font-size: 15px; }
.btn--accent:hover { background: var(--blue-accent-h); }
.btn--ghost {
  padding: 15px 30px;
  background: rgba(255, 255, 255, .12);
  color: #fff;
  font-size: 15px;
  border: 1px solid rgba(255, 255, 255, .35);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .22); }
.btn--lg { padding: 16px 38px; font-size: 16px; }

.text-link {
  align-self: flex-start;
  color: var(--blue);
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  gap: 6px;
  align-items: center;
  transition: gap .2s ease;
}
.text-link:hover { gap: 11px; }

/* ---- Header ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), var(--blue-accent));
  color: #fff;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
}
.brand__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--navy);
  letter-spacing: .04em;
}
.brand__name small { font-size: 12px; font-weight: 500; color: #5b7184; margin-left: 5px; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav__link {
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  color: #3b4f60;
  border-bottom: 2px solid transparent;
  transition: color .2s ease;
}
.nav__link:hover { color: var(--blue); }
.nav__link.is-active { color: var(--blue); border-bottom-color: var(--blue-accent); }
.nav__cta {
  margin-left: 14px;
  padding: 11px 22px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  transition: background .2s ease;
}
.nav__cta:hover { background: var(--blue-hover); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--navy); border-radius: 2px; }

/* ---- Footer ------------------------------------------------------------ */
.site-footer { background: var(--navy-deep); color: var(--pale-3); padding: 60px var(--pad-x) 30px; }
.site-footer__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.site-footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.site-footer__brand .brand__name { color: #fff; }
.site-footer__addr { font-size: 13px; line-height: 1.9; color: var(--muted-3); }
.site-footer__col-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-light);
  margin-bottom: 16px;
  letter-spacing: .1em;
  min-height: 19px;
}
.site-footer__links { display: flex; flex-direction: column; gap: 11px; align-items: flex-start; }
.site-footer__links a { font-size: 14px; color: var(--pale-3); transition: color .2s ease; }
.site-footer__links a:hover { color: #fff; }
.site-footer__copy { max-width: var(--maxw); margin: 24px auto 0; font-size: 12px; color: var(--muted-4); }

/* ---- Page header band (Business / Quality / Contact) ------------------- */
.page-head {
  background: linear-gradient(120deg, var(--navy), var(--navy-mid));
  color: #fff;
  padding: 78px var(--pad-x) 64px;
}
.page-head__title { font-size: 40px; font-weight: 900; margin: 16px 0 20px; }
.page-head__lead { font-size: 16px; color: var(--pale-2); max-width: 760px; }
.page-head--photo { position: relative; overflow: hidden; }
.page-head--photo .container { position: relative; z-index: 1; }
.page-head__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .28; }
.page-head__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(13,39,64,.92) 0%, rgba(22,82,127,.72) 100%);
}

/* ---- Image helpers ----------------------------------------------------- */
.media {
  background: var(--stripe) center / cover no-repeat;
  background-color: var(--bg-tint);
}
.media img { width: 100%; height: 100%; object-fit: cover; }

/* =========================================================================
   HOME
   ========================================================================= */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}
.hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .42; }
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(13,39,64,.92) 0%, rgba(13,39,64,.6) 48%, rgba(13,39,64,.15) 100%);
}
.hero__inner { position: relative; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); width: 100%; }
.hero__content { max-width: 660px; color: #fff; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: .22em;
  color: var(--blue-light); margin-bottom: 26px;
}
.hero__eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--blue-light); }
.hero__title { font-size: 54px; font-weight: 900; line-height: 1.28; letter-spacing: .02em; margin-bottom: 26px; }
.hero__title em { font-style: normal; color: var(--blue-light); }
.hero__text { font-size: 17px; line-height: 2; color: #d4e3ef; max-width: 540px; margin-bottom: 38px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__bar { position: absolute; bottom: 0; left: 0; right: 0; height: 8px;
  background: linear-gradient(90deg, var(--blue), var(--blue-accent), var(--blue-light)); }

.intro { max-width: 1000px; margin: 0 auto; padding: 86px var(--pad-x) 30px; text-align: center; }
.intro h2 { font-size: 32px; font-weight: 700; color: var(--navy); margin: 18px 0 22px; }
.intro p { font-size: 16px; color: var(--ink-1); max-width: 720px; margin: 0 auto; }

/* Alternating full-width feature rows（Home / 採用情報で共用） */
.features { max-width: var(--maxw); margin: 0 auto; padding: 40px var(--pad-x) 100px; display: flex; flex-direction: column; gap: 88px; }
.feature {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
  color: inherit;
}
.feature--reverse .feature__media { order: 1; }
.feature--reverse .feature__text { order: 2; }
.feature__media { height: 360px; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); }
.feature__media img { transition: transform .5s ease; }
.feature:hover .feature__media img { transform: scale(1.05); }
.feature__num { font-family: var(--font-head); font-weight: 900; font-size: 60px; color: var(--pale-1); line-height: 1; margin-bottom: 4px; }
.feature__text h2 { font-size: 30px; font-weight: 700; color: var(--navy); margin: 6px 0 18px; }
.feature__text p { font-size: 15px; color: var(--ink-1); margin-bottom: 26px; }
a.feature:hover .text-link { gap: 11px; }

/* 単独のワイド写真帯 */
.photo-band { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }
.photo-band__frame { height: 380px; border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); }

/* =========================================================================
   BUSINESS
   ========================================================================= */
.biz-list { max-width: 1100px; margin: 0 auto; padding: 80px var(--pad-x) 96px; display: flex; flex-direction: column; gap: 64px; }
.biz-row { display: grid; grid-template-columns: 1.1fr 1fr; gap: 46px; align-items: center; }
.biz-row--reverse { grid-template-columns: 1fr 1.1fr; }
.biz-row--reverse .biz-row__media { order: 1; }
.biz-row--reverse .biz-row__text { order: 2; }
.biz-row__text h2 { font-size: 27px; font-weight: 700; color: var(--navy); margin: 14px 0 18px; }
.biz-row__text p { font-size: 15px; color: var(--ink-1); }
.biz-row__media { height: 280px; border-radius: 16px; overflow: hidden; }

.cta-band { background: var(--bg-tint); padding: 60px var(--pad-x); text-align: center; }
.cta-band h3 { font-size: 24px; font-weight: 700; color: var(--navy); margin-bottom: 14px; }
.cta-band p { font-size: 15px; color: var(--ink-2); margin-bottom: 28px; }

/* =========================================================================
   QUALITY
   ========================================================================= */
.quality-list { max-width: 1080px; margin: 0 auto; padding: 80px var(--pad-x) 60px; display: flex; flex-direction: column; gap: 30px; }
.quality-card {
  display: grid; grid-template-columns: 64px 1fr; gap: 26px; align-items: start;
  border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 38px 40px; background: #fff; box-shadow: var(--shadow-card);
}
.quality-card__num {
  width: 64px; height: 64px; border-radius: var(--radius-sm); background: var(--bg-tint);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 900; font-size: 24px; color: var(--blue);
}
.quality-card h2 { font-size: 23px; font-weight: 700; color: var(--navy); margin-bottom: 14px; }
.quality-card p { font-size: 15px; color: var(--ink-1); margin-bottom: 18px; }
.quality-card p:last-child { margin-bottom: 0; }
.badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge { font-size: 12px; font-weight: 700; color: var(--blue); background: var(--bg-tint); padding: 7px 14px; border-radius: 999px; }

.quality-media { max-width: 1080px; margin: 0 auto; padding: 0 var(--pad-x) 96px; }
.quality-media__frame { height: 300px; border-radius: var(--radius-card); overflow: hidden; }

/* =========================================================================
   RECRUIT
   ========================================================================= */
.recruit-hero {
  position: relative; min-height: 420px; display: flex; align-items: center;
  overflow: hidden; background: var(--navy);
}
.recruit-hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .4; }
.recruit-hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(13,39,64,.96), rgba(21,99,158,.55));
}
.recruit-hero__inner { position: relative; max-width: var(--maxw); margin: 0 auto; padding: 60px var(--pad-x); width: 100%; color: #fff; }
.recruit-hero__title { font-size: 46px; font-weight: 900; margin: 18px 0; }
.recruit-hero__lead { font-size: 16px; color: var(--pale-2); max-width: 620px; }

.section { max-width: 1080px; margin: 0 auto; padding: 80px var(--pad-x) 24px; }
.section__title { font-size: 28px; font-weight: 700; color: var(--navy); text-align: center; margin: 12px 0 40px; }

.persona-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.persona {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 44px 30px 38px; background: #fff;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
}
.persona:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-h); }
.persona__icon {
  width: 60px; height: 60px; border-radius: 50%;
  background: var(--bg-tint); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.persona__icon svg { width: 28px; height: 28px; }
.persona__title { font-family: var(--font-head); font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.persona p { font-size: 14px; font-weight: 500; color: var(--ink-2); line-height: 1.9; }

.reasons-band { background: var(--bg-tint); margin-top: 70px; padding: 74px var(--pad-x); }
.reasons-band__inner { max-width: 1080px; margin: 0 auto; }
.reasons { display: flex; flex-direction: column; gap: 72px; }

.requirements { max-width: 920px; margin: 0 auto; padding: 80px var(--pad-x) 30px; }
.req-table { border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.req-row { display: grid; grid-template-columns: 200px 1fr; border-bottom: 1px solid #eef2f6; }
.req-row:last-child { border-bottom: none; }
.req-row__key { background: var(--bg-tint-2); padding: 18px 24px; font-weight: 700; font-size: 14px; color: var(--navy); }
.req-row__val { padding: 18px 24px; font-size: 14px; color: var(--ink-1); }

.recruit-cta { text-align: center; padding: 20px var(--pad-x) 96px; }
.recruit-cta p { font-size: 13px; color: #7a8a99; margin-top: 16px; }

/* =========================================================================
   CONTACT
   ========================================================================= */
.contact-grid {
  max-width: 1080px; margin: 0 auto; padding: 80px var(--pad-x) 96px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start;
}
.contact-col h2 { font-size: 22px; font-weight: 700; color: var(--navy); margin-bottom: 26px; }
.contact-info { display: flex; flex-direction: column; gap: 18px; }
.info-card { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 24px 26px; }
.info-card--accent { background: var(--bg-tint-2); }
.info-card__label { font-size: 12px; font-weight: 700; letter-spacing: .1em; color: var(--blue-accent); margin-bottom: 6px; }
.info-card__tel { font-family: var(--font-head); font-weight: 900; font-size: 30px; color: var(--navy); }
.info-card__tel a { color: inherit; }
.info-card__sub { font-size: 13px; color: var(--muted-1); margin-top: 4px; }
.info-card__val { font-weight: 700; font-size: 16px; color: var(--navy); }
.info-card__val--break { word-break: break-all; }
.info-card__val--lg { font-size: 19px; }
.info-card__addr { font-size: 15px; color: var(--ink-1); }

.form { display: flex; flex-direction: column; gap: 18px; }
.field label { display: block; font-size: 13px; font-weight: 700; color: var(--navy); margin-bottom: 7px; }
.field .req { color: var(--error); }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border: 1px solid var(--border-input);
  border-radius: 10px; font-size: 14px; font-family: inherit; background: #fff;
}
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue-accent); outline: none; }
.form__submit { padding: 15px; border-radius: 10px; background: var(--blue); color: #fff; font-weight: 700; font-size: 15px; margin-top: 4px; transition: background .2s ease; }
.form__submit:hover { background: var(--blue-hover); }
.form__error { font-size: 13px; color: var(--error); font-weight: 500; }
.form__note { font-size: 12px; color: var(--muted-2); }

.form-success {
  border: 1px solid var(--success-border); background: var(--success-bg);
  border-radius: var(--radius-sm); padding: 40px 30px; text-align: center;
}
.form-success__icon { font-size: 40px; margin-bottom: 10px; color: var(--success); }
.form-success h3 { font-size: 19px; font-weight: 700; color: var(--success); margin-bottom: 8px; }
.form-success p { font-size: 14px; color: var(--ink-1); }

.contact-map { border-top: 1px solid var(--border); }
.contact-map iframe { display: block; width: 100%; height: 360px; border: 0; }

[hidden] { display: none !important; }

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width: 900px) {
  :root { --pad-x: 22px; }

  /* Mobile nav */
  .nav-toggle { display: flex; }
  .nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    padding: 8px var(--pad-x) 16px;
    box-shadow: 0 12px 24px rgba(13, 39, 64, .08);
  }
  .nav[hidden] { display: none; }
  .nav__link { padding: 14px 4px; border-bottom: 1px solid var(--border); border-radius: 0; }
  .nav__link.is-active { border-bottom-color: var(--border); }
  .nav__cta { margin: 12px 0 0; text-align: center; }

  .persona-grid { grid-template-columns: 1fr; }

  .site-footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .site-footer__col-title { min-height: 0; }

  .features { gap: 56px; padding-bottom: 72px; }
  .feature,
  .feature--reverse { grid-template-columns: 1fr; gap: 22px; }
  .feature__media { order: -1; height: 240px; }
  .feature--reverse .feature__media { order: -1; }
  .feature--reverse .feature__text { order: 0; }
  .feature__num { font-size: 48px; }
  .feature__text h2 { font-size: 26px; }
  .reasons { gap: 48px; }
  .photo-band__frame { height: 240px; }

  .biz-row,
  .biz-row--reverse { grid-template-columns: 1fr; gap: 24px; }
  .biz-row--reverse .biz-row__media { order: 0; }
  .biz-row--reverse .biz-row__text { order: 0; }

  .quality-card { grid-template-columns: 1fr; gap: 18px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

  .hero__title { font-size: 38px; }
  .hero__text { font-size: 16px; }
  .page-head__title { font-size: 30px; }
  .recruit-hero__title { font-size: 34px; }
  .intro h2 { font-size: 26px; }
  .req-row { grid-template-columns: 1fr; }
  .req-row__key { border-bottom: 1px solid #eef2f6; }
}

@media (max-width: 520px) {
  .hero__title { font-size: 30px; }
  .page-head { padding: 56px var(--pad-x) 44px; }
}