/* ============================================================
   Bright Grove Thread — 株式会社ブライトグローブスレッド
   Common Design System v1.0  |  2026
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500&family=Noto+Sans+JP:wght@300;400;500&family=Noto+Serif+JP:wght@200;300;400;500;600&display=swap');

:root {
  --bg:          #FAFAF7;
  --linen:       #F3EDE4;
  --linen-mid:   #EAE0D5;
  --linen-dark:  #DDD4C6;
  --oak:         #C4A882;
  --oak-dark:    #A8886A;
  --olive:       #7A8C6E;
  --olive-light: #9EAF92;
  --olive-pale:  #EEF1EB;
  --gold:        #C8A84B;
  --gold-light:  #E5C97A;
  --gold-pale:   #F7F0DC;
  --text:        #2C2C2A;
  --text-mid:    #4A4A47;
  --text-light:  #6B6860;
  --text-muted:  #9A9490;
  --border:      rgba(196,168,130,0.25);
  --border-mid:  rgba(196,168,130,0.5);
  --shadow-sm:   0 2px 12px rgba(44,44,42,0.06);
  --shadow-md:   0 8px 40px rgba(44,44,42,0.1);
  --shadow-lg:   0 20px 80px rgba(44,44,42,0.14);

  --font-en:     'Cormorant Garamond', 'Georgia', serif;
  --font-jp:     'Noto Serif JP', 'Yu Mincho', '游明朝', serif;
  --font-sans:   'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;

  --max:         1320px;
  --pad:         clamp(1.25rem, 4vw, 3.5rem);
  --radius:      2px;
  --transition:  all 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Typography ─────────────────────────────────────────────── */
.t-display {
  font-family: var(--font-en);
  font-size: clamp(2.8rem, 7vw, 7rem);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.01em;
}
.t-h1 {
  font-family: var(--font-jp);
  font-size: clamp(1.8rem, 4.5vw, 4.5rem);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: 0.04em;
}
.t-h2 {
  font-family: var(--font-jp);
  font-size: clamp(1.4rem, 3vw, 3rem);
  font-weight: 300;
  line-height: 1.35;
  letter-spacing: 0.03em;
}
.t-h3 {
  font-family: var(--font-jp);
  font-size: clamp(1rem, 1.8vw, 1.6rem);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.04em;
}
.t-label {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

/* ── Layout ──────────────────────────────────────────────────── */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}
.section { padding: clamp(4rem, 9vw, 10rem) 0; }
.section--linen { background-color: var(--linen); }
.section--olive-pale { background-color: var(--olive-pale); }
.section--dark { background-color: var(--text); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 4vw, 5rem); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(1.5rem, 3vw, 3rem); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: clamp(1.5rem, 2.5vw, 2.5rem); }

.text-center { text-align: center; }
.text-right  { text-align: right; }

/* ── Section Label ─────────────────────────────────────────── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}
.section-label::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--gold);
}
.section-label span {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ── Divider ────────────────────────────────────────────────── */
.divider {
  width: 3rem; height: 1px;
  background: linear-gradient(to right, var(--gold), var(--oak));
  margin: 2rem 0;
}
.divider--center { margin: 2rem auto; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.9rem 2.2rem;
  font-family: var(--font-sans); font-size: 0.72rem; font-weight: 400;
  letter-spacing: 0.2em; text-transform: uppercase;
  transition: var(--transition); position: relative;
}
.btn--primary { background: var(--text); color: var(--bg); border: 1px solid var(--text); }
.btn--primary:hover { background: var(--oak-dark); border-color: var(--oak-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(44,44,42,0.2); }
.btn--outline { background: transparent; color: var(--text); border: 1px solid var(--border-mid); }
.btn--outline:hover { background: var(--text); color: var(--bg); border-color: var(--text); transform: translateY(-2px); }
.btn--gold { background: var(--gold); color: var(--text); border: 1px solid var(--gold); }
.btn--gold:hover { background: var(--oak-dark); border-color: var(--oak-dark); color: var(--bg); transform: translateY(-2px); }
.btn svg { width: 1rem; height: 1rem; transition: transform 0.3s ease; }
.btn:hover svg { transform: translateX(4px); }

/* ── Cards ──────────────────────────────────────────────────── */
.card { background: var(--bg); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.card__img { position: relative; overflow: hidden; aspect-ratio: 4/3; }
.card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s cubic-bezier(0.25,0.46,0.45,0.94); }
.card:hover .card__img img { transform: scale(1.05); }
.card__body { padding: 1.75rem; }
.card__tag { font-size: 0.62rem; font-weight: 500; letter-spacing: 0.22em; text-transform: uppercase; color: var(--gold); margin-bottom: 0.75rem; }
.card__title { font-family: var(--font-jp); font-size: 1rem; font-weight: 400; line-height: 1.6; letter-spacing: 0.04em; margin-bottom: 0.75rem; }
.card__excerpt { font-size: 0.82rem; color: var(--text-light); line-height: 2; margin-bottom: 1.25rem; }
.card__meta { font-size: 0.68rem; color: var(--text-muted); letter-spacing: 0.1em; }

/* ── Quote ──────────────────────────────────────────────────── */
.quote-block { border-left: 2px solid var(--gold); padding: 1.5rem 0 1.5rem 2rem; margin: 3rem 0; }
.quote-block p { font-family: var(--font-en); font-size: clamp(1.1rem, 2.5vw, 1.7rem); font-style: italic; font-weight: 300; color: var(--text-mid); line-height: 1.65; }
.quote-block cite { display: block; margin-top: 0.75rem; font-style: normal; font-size: 0.7rem; letter-spacing: 0.18em; color: var(--text-muted); text-transform: uppercase; }

/* ── HEADER ─────────────────────────────────────────────────── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  transition: background 0.5s ease, box-shadow 0.5s ease;
}
.site-header.scrolled {
  background: rgba(250,250,247,0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--border);
}
.header-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 var(--pad);
  height: 72px; display: flex; align-items: center; justify-content: space-between;
}
.site-logo { display: flex; align-items: center; gap: 0.875rem; flex-shrink: 0; }
.site-logo__mark { width: 38px; height: 38px; flex-shrink: 0; }
.site-logo__text { display: flex; flex-direction: column; gap: 2px; }
.site-logo__en { font-family: var(--font-en); font-size: 0.95rem; font-weight: 500; letter-spacing: 0.12em; color: var(--text); line-height: 1; }
.site-logo__jp { font-family: var(--font-jp); font-size: 0.52rem; font-weight: 300; letter-spacing: 0.14em; color: var(--text-light); line-height: 1; }

.primary-nav { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.2rem); }
.primary-nav a {
  font-family: var(--font-jp); font-size: 0.76rem; font-weight: 300;
  letter-spacing: 0.1em; color: var(--text-mid);
  position: relative; padding-bottom: 2px; white-space: nowrap;
}
.primary-nav a::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 1px;
  background: var(--gold); transition: width 0.35s ease;
}
.primary-nav a:hover, .primary-nav a.active { color: var(--text); }
.primary-nav a:hover::after, .primary-nav a.active::after { width: 100%; }
.nav-contact { padding: 0.55rem 1.3rem !important; border: 1px solid var(--border-mid); }
.nav-contact:hover { background: var(--text) !important; color: var(--bg) !important; border-color: var(--text) !important; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; width: 26px; cursor: pointer; padding: 4px; z-index: 1010; }
.menu-toggle span { display: block; height: 1px; background: var(--text); transition: var(--transition); transform-origin: center; }
.menu-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav {
  position: fixed; inset: 0; background: var(--bg); z-index: 999;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 1.75rem; opacity: 0; pointer-events: none;
  transition: opacity 0.4s ease; padding: var(--pad);
}
.mobile-nav.is-open { opacity: 1; pointer-events: all; }
.mobile-nav a {
  font-family: var(--font-jp); font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-weight: 300; letter-spacing: 0.1em; color: var(--text);
  padding: 0.5rem 0; border-bottom: 1px solid var(--border);
  width: 100%; max-width: 340px; text-align: center;
}
.mobile-nav a:hover { color: var(--gold); }

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer { background: var(--text); color: rgba(250,250,247,0.8); padding: clamp(4rem, 8vw, 8rem) 0 2.5rem; }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 5rem);
  padding-bottom: clamp(3rem, 5vw, 5rem);
  border-bottom: 1px solid rgba(250,250,247,0.1);
  margin-bottom: 2.5rem;
}
.footer-brand .site-logo__en { color: var(--bg); }
.footer-brand .site-logo__jp { color: rgba(250,250,247,0.45); }
.footer-brand p { font-size: 0.8rem; font-weight: 300; line-height: 2; color: rgba(250,250,247,0.55); margin-top: 1.25rem; max-width: 260px; }
.footer-address { font-size: 0.72rem; color: rgba(250,250,247,0.4); line-height: 2; margin-top: 1.25rem; font-family: var(--font-jp); }
.footer-col h4 { font-family: var(--font-jp); font-size: 0.76rem; font-weight: 400; letter-spacing: 0.12em; color: var(--bg); margin-bottom: 1.25rem; }
.footer-col ul li { margin-bottom: 0.6rem; }
.footer-col ul li a { font-family: var(--font-jp); font-size: 0.76rem; font-weight: 300; color: rgba(250,250,247,0.48); letter-spacing: 0.06em; }
.footer-col ul li a:hover { color: var(--gold); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-bottom p, .footer-bottom a { font-size: 0.68rem; color: rgba(250,250,247,0.32); letter-spacing: 0.1em; font-family: var(--font-sans); }
.footer-bottom a:hover { color: var(--gold); }

/* ── Page Hero ──────────────────────────────────────────────── */
.page-hero { position: relative; min-height: 60vh; display: flex; align-items: flex-end; overflow: hidden; }
.page-hero__bg { position: absolute; inset: 0; z-index: 0; }
.page-hero__bg img { width: 100%; height: 100%; object-fit: cover; }
.page-hero__bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(160deg, rgba(44,44,42,0.55) 0%, rgba(44,44,42,0.15) 100%); }
.page-hero__content {
  position: relative; z-index: 1; max-width: var(--max); width: 100%;
  margin: 0 auto; padding: var(--pad);
  padding-top: 10rem; padding-bottom: clamp(3rem, 6vw, 6rem);
}
.page-hero__eyebrow { font-size: 0.62rem; font-weight: 500; letter-spacing: 0.32em; text-transform: uppercase; color: var(--gold); margin-bottom: 1rem; font-family: var(--font-sans); }
.page-hero__title { font-family: var(--font-jp); font-size: clamp(1.8rem, 5vw, 4.5rem); font-weight: 200; line-height: 1.25; color: var(--bg); letter-spacing: 0.06em; max-width: 640px; }
.page-hero__en { font-family: var(--font-en); font-size: clamp(1.1rem, 2.8vw, 2.2rem); font-style: italic; font-weight: 300; color: rgba(250,250,247,0.68); display: block; margin-top: 0.5rem; }
.page-hero__desc { margin-top: 1.5rem; font-size: 0.88rem; font-weight: 300; color: rgba(250,250,247,0.68); max-width: 460px; line-height: 2.1; font-family: var(--font-jp); }

/* ── Animations ─────────────────────────────────────────────── */
@keyframes fadeUp { from { opacity:0; transform:translateY(28px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

.anim-fade-up { opacity: 0; transform: translateY(28px); transition: opacity 0.8s ease, transform 0.8s ease; }
.anim-fade-up.visible { opacity: 1; transform: translateY(0); }
.anim-fade-in { opacity: 0; transition: opacity 1s ease; }
.anim-fade-in.visible { opacity: 1; }

.stagger > *:nth-child(1) { transition-delay: 0s; }
.stagger > *:nth-child(2) { transition-delay: 0.1s; }
.stagger > *:nth-child(3) { transition-delay: 0.2s; }
.stagger > *:nth-child(4) { transition-delay: 0.3s; }
.stagger > *:nth-child(5) { transition-delay: 0.4s; }
.stagger > *:nth-child(6) { transition-delay: 0.5s; }

/* ── Toast ──────────────────────────────────────────────────── */
.toast-container { position: fixed; bottom: 2rem; right: 2rem; z-index: 9999; display: flex; flex-direction: column; gap: 0.75rem; pointer-events: none; }
.toast {
  background: var(--text); color: var(--bg);
  padding: 1rem 1.5rem;
  font-family: var(--font-jp); font-size: 0.82rem; font-weight: 300; letter-spacing: 0.05em; line-height: 1.6;
  max-width: 320px; box-shadow: var(--shadow-lg); border-left: 3px solid var(--gold);
  pointer-events: all; animation: slideInToast 0.4s ease forwards;
}
.toast.toast--success { border-left-color: var(--olive); }
.toast.toast--error { border-left-color: #C26B6B; }
@keyframes slideInToast { from { opacity:0; transform:translateX(2rem); } to { opacity:1; transform:translateX(0); } }
@keyframes slideOutToast { from { opacity:1; transform:translateX(0); } to { opacity:0; transform:translateX(2rem); } }
.toast.closing { animation: slideOutToast 0.3s ease forwards; }

/* ── Forms ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.75rem; }
.form-label { display: block; font-family: var(--font-jp); font-size: 0.78rem; font-weight: 400; letter-spacing: 0.1em; color: var(--text-mid); margin-bottom: 0.6rem; }
.form-label .required { color: var(--gold); margin-left: 0.3rem; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 0.875rem 1.2rem;
  background: var(--bg); border: 1px solid var(--border-mid);
  font-family: var(--font-jp); font-size: 0.88rem; font-weight: 300; color: var(--text);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  outline: none; border-radius: 0; -webkit-appearance: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--gold); box-shadow: 0 0 0 3px rgba(200,168,75,0.12);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); font-size: 0.82rem; }
.form-textarea { min-height: 160px; resize: vertical; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .primary-nav { gap: 1.4rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .primary-nav { display: none; }
  .menu-toggle { display: flex; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand p { max-width: 100%; }
  .page-hero { min-height: 70vh; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .toast-container { left: 1rem; right: 1rem; bottom: 1rem; }
  .toast { max-width: 100%; }
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--linen); }
::-webkit-scrollbar-thumb { background: var(--oak); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--oak-dark); }
::selection { background: rgba(200,168,75,0.22); color: var(--text); }