/* ============================================================
   KYOSEI — style.css
   Aesthetic: Refined editorial luxury, monochrome + warm cream
   Fonts: Cormorant Garamond (display) + Noto Sans JP (body)
   ============================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  :root {
    --black:    #0e0e0e;
    --white:    #fafaf7;
    --cream:    #f3f0e8;
    --gray:     #8a8a8a;
    --gray-lt:  #d4d0c8;
    --accent:   #c8a96e;          /* warm gold */
  
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body:    'Noto Sans JP', sans-serif;
  
    --header-h: 72px;
    --section-pad: clamp(80px, 10vw, 140px);
    --max-w: 1140px;
    --radius: 16px;
  
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  }
  
  html { scroll-behavior: smooth; }
  
  body {
    background: var(--white);
    color: var(--black);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
  }
  
  img { display: block; max-width: 100%; }
  a   { color: inherit; text-decoration: none; }
  button { font-family: inherit; cursor: pointer; }
  
  /* ── Utility ──────────────────────────────────────────────── */
  .visually-hidden {
    position: absolute; width: 1px; height: 1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
  }
  
  /* ── Reveal animation ─────────────────────────────────────── */
  .reveal {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  /* ── Buttons ──────────────────────────────────────────────── */
  .btn-primary {
    display: inline-block;
    padding: 13px 32px;
    background: var(--black);
    color: var(--white);
    font-family: var(--font-body);
    font-size: 13px;
    letter-spacing: 1.5px;
    border-radius: 40px;
    border: 1.5px solid var(--black);
    transition: background 0.3s, color 0.3s, transform 0.3s;
  }
  .btn-primary:hover {
    background: transparent;
    color: var(--black);
    transform: translateY(-2px);
  }
  
  .btn-ghost {
    display: inline-block;
    padding: 13px 32px;
    background: transparent;
    color: var(--black);
    font-family: var(--font-body);
    font-size: 13px;
    letter-spacing: 1.5px;
    border-radius: 40px;
    border: 1.5px solid rgba(0,0,0,0.25);
    transition: border-color 0.3s, transform 0.3s;
  }
  .btn-ghost:hover {
    border-color: var(--black);
    transform: translateY(-2px);
  }
  
  .contact-btn {
    display: inline-block;
    padding: 8px 20px;
    background: transparent;
    color: var(--black);
    font-family: var(--font-body);
    font-size: 12px;
    letter-spacing: 2px;
    border-radius: 40px;
    border: 1px solid rgba(0,0,0,0.28);
    transition: border-color 0.25s, color 0.25s, background 0.25s;
  }
  .contact-btn:hover {
    border-color: var(--black);
    background: var(--black);
    color: var(--white);
  }
  .contact-btn--light {
    color: var(--white);
    border-color: rgba(255,255,255,0.35);
  }
  .contact-btn--light:hover {
    background: var(--white);
    color: var(--black);
    border-color: var(--white);
  }
  
  /* ── HEADER ───────────────────────────────────────────────── */
  #site-header {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: var(--header-h);
    z-index: 900;
    background: rgba(250,250,247,0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.4s, box-shadow 0.4s;
  }
  #site-header.scrolled {
    border-color: rgba(0,0,0,0.08);
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  }
  
  .header-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .logo img {
    height: 40px;
    width: auto;
  }
  
  nav {
    display: flex;
    align-items: center;
    gap: 36px;
  }
  nav a {
    font-size: 13px;
    letter-spacing: 1.5px;
    color: var(--black);
    opacity: 0.7;
    transition: opacity 0.2s;
  }
  nav a:hover { opacity: 1; }
  
  .hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 4px;
  }
  .hamburger span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--black);
    transition: transform 0.3s, opacity 0.3s;
  }
  .hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; }
  .hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
  
  /* Mobile nav */
  .mobile-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 40px 24px;
    z-index: 800;
    transform: translateY(-110%);
    transition: transform 0.4s var(--ease-out);
    border-bottom: 1px solid var(--gray-lt);
  }
  .mobile-nav.open { transform: translateY(0); }
  .mobile-nav a {
    font-size: 16px;
    letter-spacing: 1.5px;
  }
  
  /* ── HERO ─────────────────────────────────────────────────── */
  #hero {
    min-height: 100vh;
    padding-top: var(--header-h);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--white);
  }
  
  .hero-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 80px 40px;
    position: relative;
    z-index: 2;
  }
  
  .hero-eyebrow {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--gray);
    margin-bottom: 28px;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 0.2s forwards;
  }
  
  #hero h1 {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 32px;
  }
  
  .line {
    font-family: var(--font-display);
    font-size: clamp(48px, 7vw, 90px);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.5px;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) forwards;
  }
  .line:nth-child(1) { animation-delay: 0.45s; }
  .line:nth-child(2) { animation-delay: 0.8s; }
  .line--italic { font-style: italic; color: var(--accent); }
  
  .hero-sub {
    font-size: 14px;
    letter-spacing: 1px;
    color: var(--gray);
    margin-bottom: 48px;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 1.2s forwards;
  }
  
  .hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 1.5s forwards;
  }
  
  /* Decorative */
  .hero-deco {
    position: absolute;
    right: -80px; bottom: -60px;
    width: 600px; height: 600px;
    pointer-events: none;
    z-index: 1;
  }
  .deco-circle {
    width: 100%; height: 100%;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.06);
    animation: spin 40s linear infinite;
  }
  .deco-line {
    position: absolute;
    top: 50%; left: 50%;
    width: 70%; height: 1px;
    background: linear-gradient(90deg, transparent, var(--gray-lt), transparent);
    transform-origin: left center;
    animation: spin 20s linear infinite reverse;
  }
  @keyframes spin { to { transform: rotate(360deg); } }
  
  /* Scroll hint */
  .hero-scroll-hint {
    position: absolute;
    bottom: 36px; left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 2s forwards;
  }
  .hero-scroll-hint span {
    font-size: 9px;
    letter-spacing: 3px;
    color: var(--gray);
  }
  .scroll-bar {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--gray), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
  }
  @keyframes scrollPulse {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50%       { transform: scaleY(0.4); opacity: 0.4; }
  }
  
  /* ── BUSINESS SECTIONS ────────────────────────────────────── */
  .business-section {
    padding: var(--section-pad) 40px;
    background: var(--white);
  }
  .business-section--alt {
    background: var(--cream);
  }
  
  .section-label {
    max-width: var(--max-w);
    margin: 0 auto 56px;
    display: flex;
    align-items: baseline;
    gap: 16px;
    border-bottom: 1px solid var(--gray-lt);
    padding-bottom: 16px;
  }
  .label-en {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 400;
    letter-spacing: 1px;
  }
  .label-ja {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--gray);
  }
  
  .biz-card {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
  }
  .biz-card--reverse { direction: rtl; }
  .biz-card--reverse > * { direction: ltr; }
  
  .biz-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 5vw, 60px);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
  }
  .biz-title small {
    font-size: 0.55em;
    color: var(--gray);
    display: block;
    font-weight: 300;
    letter-spacing: 2px;
  }
  
  .biz-desc {
    font-size: 14px;
    line-height: 2;
    color: #555;
    margin-bottom: 36px;
  }
  
  /* Product row */
  .product-row {
    display: flex;
    gap: 24px;
    margin-bottom: 36px;
  }
  .product-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--black);
    transition: transform 0.3s;
  }
  .product-item:hover { transform: translateY(-4px); }
  .product-img-wrap {
    width: 90px; height: 90px;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--gray-lt);
    background: var(--cream);
  }
  .product-img-wrap img {
    width: 100%; height: 100%;
    object-fit: cover;
  }
  .product-item p {
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--gray);
  }
  
  /* Business visual */
  .biz-visual img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    border-radius: var(--radius);
  }
  
  /* Contact info */
  .contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 36px;
  }
  .contact-row {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 14px;
    color: #444;
  }
  .contact-icon {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: 1px solid var(--gray-lt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-family: var(--font-display);
    flex-shrink: 0;
  }
  
  /* ── ABOUT ────────────────────────────────────────────────── */
  .about-section {
    padding: var(--section-pad) 40px;
    background: var(--black);
    color: var(--white);
  }
  
  .about-inner {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 56px;
    text-align: center;
  }
  
  .section-eyebrow {
    font-size: 10px;
    letter-spacing: 4px;
    color: var(--accent);
    margin-bottom: 24px;
  }
  
  .about-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 3.5vw, 52px);
    font-weight: 400;
    line-height: 1.4;
    margin-bottom: 28px;
  }
  .about-title em {
    font-style: italic;
    color: var(--accent);
  }
  
  .about-body {
    font-size: 14px;
    line-height: 2;
    color: rgba(255,255,255,0.6);
  }
  
  /* Brands slider */
  .brands-block {
    padding: 48px 0 0;
    width: 100%;
    text-align: center;
  }
  .brands-label {
    font-size: 10px;
    letter-spacing: 3px;
    color: rgba(255,255,255,0.35);
    margin-bottom: 28px;
  }
  
  .slider {
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
  }
  
  .slide-track {
    display: flex;
    width: max-content;
    animation: marquee 14s linear infinite;
  }
  
  .slide {
    padding: 0 48px;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 300;
    letter-spacing: 2px;
    color: rgba(255,255,255,0.2);
    white-space: nowrap;
    transition: color 0.3s;
    cursor: default;
  }
  .slide:hover { color: rgba(255,255,255,0.8); }
  
  @keyframes marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
  }
  
  /* ── FOOTER ───────────────────────────────────────────────── */
  .site-footer {
    background: #111;
    padding: 24px 40px;
  }
  .footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 32px;
  }
  .footer-brand {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 400;
    color: var(--white);
    margin-bottom: 12px;
    letter-spacing: 1px;
  }
  .footer-left p {
    font-size: 12px;
    color: rgba(255,255,255,0.4);
    margin-top: 4px;
    letter-spacing: 0.5px;
  }
  .footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 16px;
  }
  .footer-copy {
    font-size: 11px;
    color: rgba(255,255,255,0.25);
    letter-spacing: 0.5px;
  }
  
  /* ── MODAL ────────────────────────────────────────────────── */
  .modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s var(--ease-out);
  }
  .modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }
  
  .modal-box {
    position: relative;
    width: 420px;
    max-width: calc(100vw - 48px);
    background: var(--white);
    border-radius: 24px;
    padding: 52px 48px;
    transform: translateY(24px);
    transition: transform 0.4s var(--ease-out);
  }
  .modal-overlay.active .modal-box {
    transform: translateY(0);
  }
  
  .modal-close {
    position: absolute;
    top: 20px; right: 24px;
    background: none;
    border: none;
    font-size: 22px;
    color: var(--gray);
    line-height: 1;
    cursor: pointer;
    transition: color 0.2s;
  }
  .modal-close:hover { color: var(--black); }
  
  .modal-eyebrow {
    font-size: 10px;
    letter-spacing: 4px;
    color: var(--accent);
    margin-bottom: 10px;
  }
  
  .modal-title {
    font-family: var(--font-display);
    font-size: 30px;
    font-weight: 400;
    margin-bottom: 32px;
    letter-spacing: 0.5px;
  }
  
  .modal-items {
    display: flex;
    flex-direction: column;
    gap: 18px;
  }
  
  .modal-row {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: #333;
  }
  .modal-row a {
    color: var(--black);
    border-bottom: 1px solid var(--gray-lt);
    transition: border-color 0.2s;
  }
  .modal-row a:hover { border-color: var(--black); }
  
  .modal-icon {
    width: 32px; height: 32px;
    border-radius: 50%;
    border: 1px solid var(--gray-lt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-family: var(--font-display);
    flex-shrink: 0;
    color: var(--gray);
  }
  
  /* ── Keyframes ────────────────────────────────────────────── */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(32px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  
  /* ── RESPONSIVE ───────────────────────────────────────────── */
  @media (max-width: 900px) {
    .biz-card,
    .about-inner {
      grid-template-columns: 1fr;
      gap: 48px;
    }
    .biz-card--reverse { direction: ltr; }
    .biz-visual img { height: 280px; }
  }
  
  @media (max-width: 640px) {
    :root { --section-pad: 60px; }
  
    .header-inner { padding: 0 20px; }
    nav { display: none; }
    .hamburger { display: flex; }
  
    .hero-inner { padding: 60px 20px; }
    .hero-cta { flex-direction: column; }
    .btn-primary, .btn-ghost { text-align: center; }
  
    .business-section,
    .about-section { padding: var(--section-pad) 20px; }
  
    .section-label { flex-direction: column; gap: 4px; }
  
    .product-row { gap: 14px; }
    .product-img-wrap { width: 70px; height: 70px; }
  
    .footer-inner { flex-direction: column; align-items: flex-start; }
    .footer-right { align-items: flex-start; }
  
    .hero-deco { display: none; }
  
    .about-inner { gap: 48px; }
  }