/* ==========================================================================
   株式会社金棒 コーポレートサイト リニューアルモック
   Design System / Base Styles
   ========================================================================== */

:root{
  /* --- Colors --- */
  --c-black: #141414;
  --c-ink: #1c1c1c;
  --c-gray-900: #2b2b2b;
  --c-gray-700: #545454;
  --c-gray-500: #8a8a8a;
  --c-gray-300: #c9c9c9;
  --c-gray-200: #e2e2e0;
  --c-gray-100: #f1f0ee;
  --c-white: #fdfdfc;
  --c-accent: #b03a2e;       /* アクセントカラー：抑えた朱色（鬼のモチーフを控えめに） */
  --c-accent-dark: #8c2e24;
  --c-accent-tint: #f4e6e3;

  /* --- Type --- */
  --font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-mincho: "Shippori Mincho B1", "Noto Serif JP", serif;
  --font-en: "Inter", sans-serif;

  /* --- Layout --- */
  --max-width: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius-s: 2px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font-jp);
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.85;
  font-size: 16px;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4,p{ margin: 0; }
button{ font-family: inherit; }

.container{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

/* --- Placeholder marker (仮素材/仮テキストの明示) --- */
.mock-flag{
  display: inline-flex;
  align-items: center;
  gap: .4em;
  font-family: var(--font-en);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
  border-radius: 999px;
  padding: .18em .8em;
  background: var(--c-accent-tint);
  white-space: nowrap;
}
.mock-note{
  font-size: .8rem;
  color: var(--c-gray-500);
  border-left: 2px solid var(--c-gray-300);
  padding-left: .9em;
  line-height: 1.8;
}
.placeholder-media{
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(135deg, var(--c-gray-100) 0 10px, var(--c-gray-200) 10px 20px);
  color: var(--c-gray-500);
  font-family: var(--font-en);
  font-size: .72rem;
  letter-spacing: .1em;
  border: 1px solid var(--c-gray-300);
  overflow: hidden;
}
.placeholder-media span{
  background: rgba(253,253,252,.88);
  padding: .3em 1em;
  border: 1px solid var(--c-gray-300);
}

/* ==========================================================================
   Typography helpers
   ========================================================================== */
.eyebrow{
  font-family: var(--font-en);
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-accent);
  display: inline-block;
  margin-bottom: 1.1em;
}
.heading-xl{
  font-family: var(--font-mincho);
  font-weight: 600;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.5;
  letter-spacing: .03em;
}
.heading-lg{
  font-family: var(--font-mincho);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.6;
  letter-spacing: .02em;
}
.heading-md{
  font-family: var(--font-mincho);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  line-height: 1.7;
}
.lead{
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--c-gray-700);
  line-height: 2;
}
.section-tag{
  font-family: var(--font-en);
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--c-gray-500);
}

/* ==========================================================================
   Buttons / Links
   ========================================================================== */
.btn{
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-size: .92rem;
  padding: .95em 1.9em;
  border: 1px solid var(--c-ink);
  border-radius: var(--radius-s);
  transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
  position: relative;
}
.btn-primary{
  background: var(--c-ink);
  color: var(--c-white);
}
.btn-primary:hover{ background: var(--c-accent); border-color: var(--c-accent); }
.btn-outline:hover{ background: var(--c-ink); color: var(--c-white); }
.btn .arrow{ transition: transform .3s var(--ease); }
.btn:hover .arrow{ transform: translateX(5px); }

.text-link{
  display: inline-flex;
  align-items: center;
  gap: .5em;
  font-size: .92rem;
  border-bottom: 1px solid var(--c-gray-300);
  padding-bottom: .3em;
  transition: border-color .3s var(--ease), color .3s var(--ease), gap .3s var(--ease);
}
.text-link:hover{ border-color: var(--c-ink); gap: .8em; }

/* ==========================================================================
   Header / Global Nav
   ========================================================================== */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  height: 78px;
  background: rgba(253,253,252,.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color: var(--c-gray-200);
}
.brand{
  font-family: var(--font-mincho);
  font-size: 1.05rem;
  letter-spacing: .12em;
  display: flex;
  align-items: baseline;
  gap: .5em;
}
.brand .brand-mark{
  display: inline-block;
  width: 9px; height: 9px;
  background: var(--c-accent);
  border-radius: 50%;
  transform: translateY(-2px);
}
.brand small{
  font-family: var(--font-en);
  font-size: .58rem;
  letter-spacing: .1em;
  color: var(--c-gray-500);
}

.gnav{
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 40px);
}
.gnav a{
  font-family: var(--font-en);
  font-size: .8rem;
  letter-spacing: .08em;
  padding: .4em 0;
  position: relative;
  color: var(--c-gray-700);
  transition: color .25s var(--ease);
}
.gnav a::after{
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--c-accent);
  transition: width .3s var(--ease);
}
.gnav a:hover, .gnav a[aria-current="page"]{ color: var(--c-ink); }
.gnav a:hover::after, .gnav a[aria-current="page"]::after{ width: 100%; }

.gnav-cta{
  font-family: var(--font-en) !important;
  font-size: .78rem !important;
  border: 1px solid var(--c-ink);
  padding: .6em 1.3em;
  border-radius: var(--radius-s);
  color: var(--c-ink) !important;
}
.gnav-cta:hover{ background: var(--c-ink); color: var(--c-white) !important; }
.gnav-cta::after{ display: none; }

.nav-toggle{
  display: none;
  width: 44px; height: 44px;
  border: none;
  background: none;
  position: relative;
  cursor: pointer;
  z-index: 210;
}
.nav-toggle span{
  position: absolute;
  left: 10px; right: 10px;
  height: 1px;
  background: var(--c-ink);
  transition: transform .35s var(--ease), opacity .35s var(--ease), top .35s var(--ease);
}
.nav-toggle span:nth-child(1){ top: 16px; }
.nav-toggle span:nth-child(2){ top: 22px; }
.nav-toggle span:nth-child(3){ top: 28px; }
.nav-toggle.is-active span:nth-child(1){ top: 22px; transform: rotate(45deg); }
.nav-toggle.is-active span:nth-child(2){ opacity: 0; }
.nav-toggle.is-active span:nth-child(3){ top: 22px; transform: rotate(-45deg); }

.mobile-nav{
  position: fixed;
  inset: 0;
  z-index: 190;
  background: var(--c-white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 var(--gutter);
  transform: translateY(-100%);
  transition: transform .5s var(--ease);
  visibility: hidden;
}
.mobile-nav.is-open{
  transform: translateY(0);
  visibility: visible;
}
.mobile-nav ul{ display: flex; flex-direction: column; gap: 6px; }
.mobile-nav a{
  font-family: var(--font-mincho);
  font-size: 1.7rem;
  padding: .5em 0;
  border-bottom: 1px solid var(--c-gray-200);
  display: block;
}
.mobile-nav .mobile-nav-sub{
  margin-top: 2.4em;
  display: flex;
  flex-wrap: wrap;
  gap: 1.6em;
}
.mobile-nav .mobile-nav-sub a{
  font-family: var(--font-en);
  font-size: .82rem;
  border-bottom: none;
  padding: 0;
  color: var(--c-gray-500);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{
  background: var(--c-ink);
  color: var(--c-gray-300);
  padding: 100px 0 40px;
  margin-top: 160px;
}
.footer-top{
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 60px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer-brand .brand{ color: var(--c-white); }
.footer-brand .brand small{ color: var(--c-gray-500); }
.footer-copy{
  margin-top: 1.4em;
  font-size: .85rem;
  color: var(--c-gray-500);
  max-width: 320px;
  line-height: 1.9;
}
.footer-nav{
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}
.footer-nav-col a{
  display: block;
  font-size: .88rem;
  padding: .35em 0;
  color: var(--c-gray-300);
  transition: color .25s var(--ease), padding-left .25s var(--ease);
}
.footer-nav-col a:hover{ color: var(--c-white); padding-left: 4px; }
.footer-nav-col h4{
  font-family: var(--font-en);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--c-gray-500);
  margin-bottom: 1em;
}
.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 32px;
  font-size: .78rem;
  color: var(--c-gray-500);
}
.footer-legal{ display: flex; gap: 24px; flex-wrap: wrap; }
.footer-legal a:hover{ color: var(--c-white); }
.footer-sns{ display: flex; gap: 14px; }
.footer-sns a{
  width: 34px; height: 34px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem;
  color: var(--c-gray-300);
  transition: border-color .25s var(--ease), color .25s var(--ease);
}
.footer-sns a:hover{ border-color: var(--c-white); color: var(--c-white); }

/* ==========================================================================
   Reveal-on-scroll motion（控えめな読み進めリズム）
   ========================================================================== */
[data-reveal]{
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
[data-reveal].is-visible{
  opacity: 1;
  transform: translateY(0);
}
[data-reveal-group] > *{ transition-delay: calc(var(--i, 0) * 90ms); }

/* ==========================================================================
   Page hero spacing (共通)
   ========================================================================== */
.page-hero{
  padding: 190px 0 100px;
  border-bottom: 1px solid var(--c-gray-200);
}
.page-hero .eyebrow{ display: block; }
.breadcrumb{
  font-family: var(--font-en);
  font-size: .72rem;
  color: var(--c-gray-500);
  letter-spacing: .05em;
  margin-bottom: 2em;
}
.breadcrumb a:hover{ color: var(--c-ink); }

section{ padding: 120px 0; }
.section-tight{ padding: 80px 0; }
.bordered-top{ border-top: 1px solid var(--c-gray-200); }
.bg-soft{ background: var(--c-gray-100); }
.bg-ink{ background: var(--c-ink); color: var(--c-gray-200); }

.section-head{
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Grid utilities
   ========================================================================== */
.grid{ display: grid; gap: var(--gutter); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }

/* ==========================================================================
   Cards
   ========================================================================== */
.card{
  border: 1px solid var(--c-gray-200);
  padding: 40px;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.card:hover{ border-color: var(--c-gray-500); }

.note-card{ display: flex; flex-direction: column; }
.note-card .note-thumb{ aspect-ratio: 4/3; margin-bottom: 22px; }
.note-card .note-meta{
  display: flex; gap: 12px; align-items: center;
  font-family: var(--font-en); font-size: .7rem;
  letter-spacing: .06em; color: var(--c-gray-500);
  margin-bottom: 12px;
}
.note-cat{
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
  padding: .2em .7em;
  border-radius: 999px;
}
.note-card h3{
  font-family: var(--font-mincho);
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: .6em;
}
.note-card p{ color: var(--c-gray-700); font-size: .9rem; margin-bottom: 1.2em; }
.note-tags{ display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.note-tags span{
  font-family: var(--font-en); font-size: .68rem;
  color: var(--c-gray-500); border: 1px solid var(--c-gray-300);
  padding: .25em .7em; border-radius: 999px;
}

/* ==========================================================================
   Tabs / Filters (NOTES)
   ========================================================================== */
.tab-list{
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--c-gray-200);
  padding-bottom: 24px;
  margin-bottom: 24px;
}
.tab-list button{
  font-family: var(--font-en);
  font-size: .78rem;
  letter-spacing: .08em;
  padding: .7em 1.3em;
  border: 1px solid var(--c-gray-300);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: all .25s var(--ease);
  color: var(--c-gray-700);
}
.tab-list button:hover{ border-color: var(--c-ink); color: var(--c-ink); }
.tab-list button.is-active{
  background: var(--c-ink); color: var(--c-white); border-color: var(--c-ink);
}
.tag-filter{ display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 56px; }
.tag-filter button{
  font-family: var(--font-en);
  font-size: .7rem;
  padding: .45em 1em;
  border: 1px solid var(--c-gray-200);
  border-radius: 999px;
  background: var(--c-white);
  color: var(--c-gray-500);
  cursor: pointer;
  transition: all .25s var(--ease);
}
.tag-filter button:hover{ border-color: var(--c-accent); color: var(--c-accent); }
.tag-filter button.is-active{
  border-color: var(--c-accent); color: var(--c-accent); background: var(--c-accent-tint);
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-row{ margin-bottom: 30px; }
.form-row label{
  display: block;
  font-size: .88rem;
  margin-bottom: .7em;
  color: var(--c-gray-700);
}
.form-row .req{
  color: var(--c-accent);
  font-size: .7rem;
  border: 1px solid var(--c-accent);
  border-radius: 999px;
  padding: .1em .6em;
  margin-left: .6em;
  vertical-align: middle;
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="tel"],
.form-row select,
.form-row textarea{
  width: 100%;
  font-family: inherit;
  font-size: .95rem;
  padding: .95em 1em;
  border: 1px solid var(--c-gray-300);
  border-radius: var(--radius-s);
  background: var(--c-white);
  transition: border-color .25s var(--ease);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus{
  outline: none; border-color: var(--c-ink);
}
.checkbox-group{ display: flex; flex-wrap: wrap; gap: 12px 20px; }
.checkbox-group label{
  display: flex; align-items: center; gap: .6em;
  font-size: .88rem; margin: 0; cursor: pointer;
}
.consent-row{
  display: flex; align-items: flex-start; gap: .8em;
  font-size: .85rem; color: var(--c-gray-700);
  padding: 24px 0;
  border-top: 1px solid var(--c-gray-200);
}
.consent-row input{ margin-top: .3em; }
.form-submit{ text-align: center; margin-top: 40px; }

/* ==========================================================================
   Misc components
   ========================================================================== */
.divider-dot{
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-accent); display: inline-block;
}
.kv-list{ display: grid; grid-template-columns: 200px 1fr; row-gap: 22px; column-gap: 24px; }
.kv-list dt{ color: var(--c-gray-500); font-size: .86rem; padding-top: .2em; }
.kv-list dd{ margin: 0; font-size: .96rem; }

.pill{
  display: inline-flex; align-items: center;
  font-family: var(--font-en); font-size: .7rem; letter-spacing: .06em;
  border: 1px solid var(--c-gray-300); border-radius: 999px;
  padding: .3em .9em; color: var(--c-gray-700);
}

.step-num{
  font-family: var(--font-en);
  font-size: .75rem;
  color: var(--c-gray-500);
}

hr.rule{ border: none; border-top: 1px solid var(--c-gray-200); margin: 60px 0; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px){
  .grid-4{ grid-template-columns: repeat(2, 1fr); }
  .grid-3{ grid-template-columns: repeat(2, 1fr); }
  .footer-top{ gap: 40px; }
}

@media (max-width: 860px){
  .gnav{ display: none; }
  .nav-toggle{ display: block; }
  section{ padding: 88px 0; }
  .page-hero{ padding: 140px 0 70px; }
  .grid-2, .grid-3, .grid-4{ grid-template-columns: 1fr; }
  .kv-list{ grid-template-columns: 1fr; row-gap: 6px; }
  .kv-list dt{ font-weight: 600; }
  .kv-list dd{ padding-bottom: 16px; border-bottom: 1px solid var(--c-gray-200); margin-bottom: 6px;}
  .section-head{ margin-bottom: 40px; }
  .footer-top{ flex-direction: column; gap: 48px; }
  .footer-nav{ gap: 32px 40px; }
  .site-footer{ margin-top: 100px; padding: 72px 0 32px; }
}