/* ==========================================================================
   Nexus Blend Ridge — Shared Design System
   尾根と森をつなぐ道 — 山岳自然サイト共通スタイル
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;1,9..144,400&family=Shippori+Mincho:wght@400;500;600;800&family=Zen+Kaku+Gothic+New:wght@300;400;500;700&family=Jost:wght@300;400;500;600&display=swap');

:root{
  --forest: #2f4a3d;
  --forest-dark: #1c2e26;
  --forest-light: #4c6d5c;
  --ridge: #7c8177;
  --ridge-light: #a3a89d;
  --mist: #a9bcc4;
  --mist-light: #cddade;
  --beige: #e8ddc9;
  --cream: #f7f3ea;
  --cream-dark: #efe8d8;
  --sun: #d8a656;
  --ink: #23291f;

  --font-display: 'Fraunces', 'Shippori Mincho', serif;
  --font-jp: 'Shippori Mincho', serif;
  --font-body: 'Zen Kaku Gothic New', 'Shippori Mincho', sans-serif;
  --font-ui: 'Jost', 'Zen Kaku Gothic New', sans-serif;

  --ease: cubic-bezier(.16,.8,.24,1);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight:400;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight:500; margin:0; color: var(--forest-dark); }
p{ margin:0; }
::selection{ background: var(--sun); color:#fff; }

.jp{ font-family: var(--font-jp); }

/* ---------- layout helpers ---------- */
.wrap{ max-width:1280px; margin:0 auto; padding-left:24px; padding-right:24px; }
@media(min-width:768px){ .wrap{ padding-left:48px; padding-right:48px; } }
section{ position:relative; }

.eyebrow{
  font-family: var(--font-ui);
  letter-spacing:.32em;
  text-transform:uppercase;
  font-size:.72rem;
  color: var(--forest-light);
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{ content:""; width:28px; height:1px; background: var(--sun); display:inline-block; }

/* ---------- scrollbar ---------- */
::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background: var(--cream); }
::-webkit-scrollbar-thumb{ background: var(--ridge-light); border-radius:10px; }

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-nav{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  padding:20px 0;
  transition: background .5s var(--ease), padding .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
  border-bottom:1px solid transparent;
}
.site-nav.scrolled{
  background: rgba(247,243,234,.86);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  padding:12px 0;
  border-color: rgba(47,74,61,.1);
  box-shadow:0 10px 30px -18px rgba(28,46,38,.35);
}
.site-nav .wrap{ display:flex; align-items:center; justify-content:space-between; gap:24px; }
.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{ color: var(--forest); flex-shrink:0; }
.brand-word{ font-family: var(--font-ui); letter-spacing:.18em; font-size:.92rem; color: var(--forest-dark); line-height:1.2; }
.brand-word b{ font-weight:600; display:block; }
.brand-word span{ font-family: var(--font-jp); font-size:.7rem; letter-spacing:.14em; color: var(--ridge); }

.nav-links{ display:none; align-items:center; gap:30px; }
@media(min-width:1080px){ .nav-links{ display:flex; } }
.nav-links a{
  font-family: var(--font-ui); font-size:.86rem; letter-spacing:.03em; color: var(--forest-dark);
  position:relative; padding:4px 0; opacity:.82; transition:opacity .3s;
}
.nav-links a:hover{ opacity:1; }
.nav-links a::after{
  content:""; position:absolute; left:0; bottom:-2px; width:0; height:1px; background: var(--sun);
  transition:width .35s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after{ width:100%; }
.nav-links a.active{ opacity:1; }

.nav-cta{
  display:none;
  font-family: var(--font-ui); font-size:.78rem; letter-spacing:.06em;
  border:1px solid var(--forest); color:var(--forest); padding:10px 22px; border-radius:999px;
  transition: background .35s var(--ease), color .35s var(--ease);
}
@media(min-width:1080px){ .nav-cta{ display:inline-block; } }
.nav-cta:hover{ background: var(--forest); color:#fff; }

.nav-toggle{
  display:flex; flex-direction:column; gap:5px; width:34px; cursor:pointer; z-index:1200;
  background:none; border:none; padding:6px;
}
@media(min-width:1080px){ .nav-toggle{ display:none; } }
.nav-toggle span{ height:1px; width:100%; background: var(--forest-dark); transition:.35s var(--ease); }
.nav-toggle.open span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity:0; }
.nav-toggle.open span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

.mobile-menu{
  position:fixed; inset:0; background: var(--forest-dark); z-index:1100;
  display:flex; flex-direction:column; justify-content:center; align-items:flex-start;
  padding:100px 32px 60px; gap:6px; overflow-y:auto;
  transform:translateY(-100%); transition:transform .55s var(--ease);
}
.mobile-menu.open{ transform:translateY(0); }
.mobile-menu a{
  font-family: var(--font-display); font-size:1.7rem; color: var(--cream); padding:10px 0;
  border-bottom:1px solid rgba(247,243,234,.08); width:100%;
}
.mobile-menu .mm-jp{ font-family: var(--font-ui); font-size:.7rem; letter-spacing:.3em; color: var(--sun); margin-top:30px; text-transform:uppercase; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  position:relative; min-height:100svh; display:flex; align-items:flex-end;
  overflow:hidden; background: var(--forest-dark);
}
.hero-media{ position:absolute; inset:0; }
.hero-media img{ width:100%; height:100%; object-fit:cover; }
.hero-media::after{
  content:""; position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(28,46,38,.15) 0%, rgba(28,46,38,.15) 40%, rgba(20,30,24,.86) 100%);
}
.parallax-layer{ position:absolute; inset:-4% -4% -4% -4%; will-change:transform; }
.mist-drift{
  position:absolute; inset:0; pointer-events:none; z-index:2; mix-blend-mode:screen; opacity:.55;
}
.mist-drift .m{
  position:absolute; bottom:-5%; width:140%; height:50%; left:-20%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,.5) 0%, rgba(255,255,255,0) 70%);
  filter:blur(30px); animation: drift 26s linear infinite;
}
.mist-drift .m2{ animation-duration:38s; opacity:.6; bottom:5%; }
.mist-drift .m3{ animation-duration:20s; opacity:.35; bottom:-15%; animation-direction:reverse; }
@keyframes drift{ 0%{ transform:translateX(-10%);} 50%{ transform:translateX(8%);} 100%{ transform:translateX(-10%);} }

.leaves-field{ position:absolute; inset:0; pointer-events:none; z-index:3; overflow:hidden; }
.leaf{
  position:absolute; top:-40px; opacity:.85; color: var(--sun);
  animation: leafFall linear infinite;
}
@keyframes leafFall{
  0%{ transform:translate(0,0) rotate(0deg); opacity:0; }
  8%{ opacity:.85; }
  92%{ opacity:.7; }
  100%{ transform:translate(var(--drift,60px), 115vh) rotate(340deg); opacity:0; }
}

.hero-content{ position:relative; z-index:5; width:100%; padding-bottom:9vh; }
.hero-eyebrow{ color: var(--beige); }
.hero-eyebrow::before{ background: var(--sun); }
.hero h1{
  color:#fdfbf6; font-size:clamp(2.6rem,6.4vw,5.6rem); line-height:1.02; margin-top:18px; font-weight:400;
  letter-spacing:-.01em;
}
.hero h1 em{ font-style:italic; color: var(--beige); }
.hero .hero-sub{
  margin-top:22px; color: var(--mist-light); font-family: var(--font-jp); font-size:clamp(1rem,1.6vw,1.25rem);
  letter-spacing:.06em;
}
.hero-actions{ margin-top:44px; display:flex; flex-wrap:wrap; gap:18px; }
.hero-scroll{
  position:absolute; right:24px; bottom:36px; z-index:6; display:flex; flex-direction:column; align-items:center; gap:10px;
  color: var(--cream); opacity:.75;
}
@media(min-width:768px){ .hero-scroll{ right:48px; } }
.hero-scroll span{ font-family: var(--font-ui); font-size:.66rem; letter-spacing:.3em; writing-mode:vertical-rl; }
.hero-scroll .line{ width:1px; height:52px; background: rgba(247,243,234,.4); position:relative; overflow:hidden; }
.hero-scroll .line::after{ content:""; position:absolute; top:-100%; left:0; width:100%; height:100%; background: var(--sun); animation: scrollLine 2.4s ease-in-out infinite; }
@keyframes scrollLine{ 0%{ top:-100%; } 60%{ top:100%; } 100%{ top:100%; } }

/* page (non-home) hero */
.page-hero{
  position:relative; min-height:64vh; display:flex; align-items:flex-end; overflow:hidden; background: var(--forest-dark);
}
.page-hero .hero-media img{ width:100%; height:100%; object-fit:cover; }
.page-hero .hero-content{ padding-bottom:8vh; }
.page-hero h1{ font-size:clamp(2.2rem,5.2vw,4.2rem); color:#fdfbf6; margin-top:14px; }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn{
  font-family: var(--font-ui); font-size:.82rem; letter-spacing:.05em; display:inline-flex; align-items:center; gap:10px;
  padding:15px 30px; border-radius:999px; transition: all .4s var(--ease); cursor:pointer; border:1px solid transparent;
  white-space:nowrap;
}
.btn svg{ width:15px; height:15px; transition:transform .4s var(--ease); pointer-events:none; }
.btn{ min-width:24px; min-height:24px; }
.btn-primary{ background: var(--sun); color:#2a2210; }
.btn-primary:hover{ background:#c6934a; transform:translateY(-2px); box-shadow:0 14px 26px -12px rgba(216,166,86,.6); }
.btn-primary:hover svg{ transform:translateX(4px); }
.btn-ghost{ border-color: rgba(247,243,234,.55); color: var(--cream); }
.btn-ghost:hover{ background: rgba(247,243,234,.12); border-color: var(--cream); transform:translateY(-2px); }
.btn-outline{ border-color: var(--forest); color: var(--forest); }
.btn-outline:hover{ background: var(--forest); color:#fff; }
.btn-dark{ background: var(--forest); color:#fff; }
.btn-dark:hover{ background: var(--forest-dark); transform:translateY(-2px); }

/* ==========================================================================
   SECTIONS / EDITORIAL
   ========================================================================== */
.section{ padding:110px 0; }
@media(max-width:768px){ .section{ padding:72px 0; } }
.section-alt{ background: var(--cream-dark); }
.section-forest{ background: var(--forest-dark); color: var(--cream); }
.section-forest h2, .section-forest h3{ color:#fff; }

.grid-split{ display:grid; gap:56px; align-items:center; }
@media(min-width:960px){ .grid-split{ grid-template-columns:1fr 1fr; gap:80px; } }
.grid-split.rev > .split-media{ order:2; }
@media(min-width:960px){ .grid-split.rev > .split-media{ order:2; } .grid-split.rev > .split-text{ order:1; } }

.split-media{ position:relative; border-radius:6px; overflow:hidden; }
.split-media img{ width:100%; height:100%; object-fit:cover; aspect-ratio:4/5; transition:transform 1.2s var(--ease); }
.split-media:hover img{ transform:scale(1.05); }
.split-media .frame-tag{
  position:absolute; bottom:18px; left:18px; background: rgba(247,243,234,.9); backdrop-filter:blur(6px);
  padding:9px 16px; font-family: var(--font-ui); font-size:.7rem; letter-spacing:.08em; color: var(--forest-dark);
  border-radius:3px;
}
.split-text h2{ font-size:clamp(1.9rem,3.4vw,2.9rem); margin-top:16px; line-height:1.12; }
.split-text .lead{ margin-top:22px; color:#4a5148; font-size:1.03rem; }
.split-text .lead + .lead{ margin-top:14px; }

/* card grids */
.card-grid{ display:grid; gap:28px; grid-template-columns:1fr; }
@media(min-width:680px){ .card-grid.cols-2{ grid-template-columns:1fr 1fr; } }
@media(min-width:900px){ .card-grid.cols-3{ grid-template-columns:repeat(3,1fr); } .card-grid.cols-4{ grid-template-columns:repeat(4,1fr); } }

.ed-card{
  position:relative; overflow:hidden; border-radius:6px; background:#111; aspect-ratio:3/4;
}
.ed-card img{ width:100%; height:100%; object-fit:cover; transition:transform 1.1s var(--ease), filter .6s; }
.ed-card::before{
  content:""; position:absolute; inset:0; background: linear-gradient(180deg, rgba(20,30,24,0) 40%, rgba(15,22,18,.92) 100%);
  z-index:1; transition:opacity .5s;
}
.ed-card:hover img{ transform:scale(1.08); }
.ed-card-body{ position:absolute; left:0; right:0; bottom:0; padding:26px; z-index:2; }
.ed-card-body .eyebrow{ color: var(--beige); font-size:.64rem; }
.ed-card-body .eyebrow::before{ background: var(--sun); }
.ed-card-body h3{ color:#fff; font-size:1.35rem; margin-top:10px; }
.ed-card-body p{ color: var(--mist-light); font-size:.86rem; margin-top:8px; line-height:1.6; }

/* glass panel */
.glass{
  background: rgba(247,243,234,.6); backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.5); border-radius:10px;
  box-shadow:0 30px 60px -30px rgba(28,46,38,.25);
}
.section-forest .glass{ background: rgba(247,243,234,.08); border-color: rgba(247,243,234,.14); }

.stat-row{ display:grid; gap:34px; grid-template-columns:repeat(2,1fr); }
@media(min-width:768px){ .stat-row{ grid-template-columns:repeat(4,1fr); } }
.stat{ text-align:left; }
.stat .num{ font-family: var(--font-display); font-size:clamp(2.1rem,4vw,3.2rem); color: var(--forest); }
.section-forest .stat .num{ color: var(--sun); }
.stat .lbl{ font-family: var(--font-ui); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color: var(--ridge); margin-top:6px; display:block; }
.section-forest .stat .lbl{ color: var(--mist-light); }

/* ==========================================================================
   MASONRY GALLERY
   ========================================================================== */
.masonry{ column-count:1; column-gap:20px; }
@media(min-width:640px){ .masonry{ column-count:2; } }
@media(min-width:1000px){ .masonry{ column-count:3; } }
.masonry .m-item{
  break-inside:avoid; margin-bottom:20px; position:relative; overflow:hidden; border-radius:6px; cursor:pointer;
  opacity:0; animation:none;
}
.masonry .m-item img{ width:100%; transition:transform .8s var(--ease), filter .5s; }
.masonry .m-item:hover img{ transform:scale(1.06); filter:brightness(.85); }
.masonry .m-item .m-cap{
  position:absolute; left:0; right:0; bottom:0; padding:18px; z-index:2;
  background:linear-gradient(180deg, rgba(20,30,24,0), rgba(15,22,18,.85));
  opacity:0; transition:opacity .4s;
}
.masonry .m-item:hover .m-cap{ opacity:1; }
.m-cap span{ font-family: var(--font-ui); color:#fff; font-size:.78rem; letter-spacing:.05em; }

.filter-bar{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:44px; }
.filter-bar button{
  font-family: var(--font-ui); font-size:.76rem; letter-spacing:.05em; padding:9px 20px; border-radius:999px;
  border:1px solid var(--ridge-light); background:transparent; color: var(--forest-dark); cursor:pointer; transition:.35s var(--ease);
}
.filter-bar button.active, .filter-bar button:hover{ background: var(--forest); border-color: var(--forest); color:#fff; }

.lightbox{
  position:fixed; inset:0; background:rgba(20,26,20,.94); z-index:2000; display:none; align-items:center; justify-content:center; padding:5vh 5vw;
}
.lightbox.open{ display:flex; }
.lightbox img{ max-width:100%; max-height:88vh; border-radius:4px; box-shadow:0 40px 80px -20px rgba(0,0,0,.6); }
.lightbox-close{
  position:absolute; top:26px; right:26px; width:46px; height:46px; border-radius:50%; border:1px solid rgba(247,243,234,.4);
  color:#fff; background:transparent; cursor:pointer; font-size:1.1rem;
}
.lightbox-cap{ position:absolute; bottom:30px; left:0; right:0; text-align:center; color: var(--mist-light); font-family: var(--font-ui); font-size:.8rem; letter-spacing:.06em; }

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-item{ border-bottom:1px solid rgba(47,74,61,.15); }
.faq-q{
  display:flex; align-items:center; justify-content:space-between; gap:20px; padding:26px 4px; cursor:pointer;
}
.faq-q h3{ font-size:1.1rem; font-weight:400; color: var(--forest-dark); }
.faq-q .plus{ position:relative; width:20px; height:20px; flex-shrink:0; }
.faq-q .plus::before, .faq-q .plus::after{ content:""; position:absolute; background: var(--forest); transition:transform .4s var(--ease); }
.faq-q .plus::before{ top:50%; left:0; width:100%; height:1px; margin-top:0; }
.faq-q .plus::after{ left:50%; top:0; height:100%; width:1px; margin-left:0; }
.faq-item.open .plus::after{ transform:rotate(90deg) scaleY(0); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .5s var(--ease); }
.faq-a p{ padding:0 4px 28px; color:#4a5148; font-size:.96rem; max-width:70ch; }

/* ==========================================================================
   FORM
   ========================================================================== */
.field{ margin-bottom:22px; }
.field label{ display:block; font-family: var(--font-ui); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color: var(--ridge); margin-bottom:10px; }
.field input, .field textarea, .field select{
  width:100%; background: rgba(255,255,255,.5); border:1px solid rgba(47,74,61,.22); border-radius:4px; padding:14px 16px;
  font-family: var(--font-body); font-size:.96rem; color: var(--ink); transition:border-color .3s, background .3s;
}
.field input:focus, .field textarea:focus, .field select:focus{ outline:none; border-color: var(--forest); background:#fff; }
.field textarea{ resize:vertical; min-height:140px; }

/* toast (non-blocking popup) */
.toast-stack{ position:fixed; top:24px; right:24px; z-index:3000; display:flex; flex-direction:column; gap:12px; align-items:flex-end; }
.toast{
  display:flex; align-items:center; gap:12px; background: var(--forest-dark); color:#fff; padding:16px 22px;
  border-radius:6px; box-shadow:0 20px 40px -16px rgba(0,0,0,.4); font-family: var(--font-ui); font-size:.84rem;
  transform:translateX(120%); opacity:0; transition: transform .5s var(--ease), opacity .5s var(--ease);
  max-width:320px; border-left:3px solid var(--sun);
}
.toast.show{ transform:translateX(0); opacity:1; }

/* ==========================================================================
   REVEAL / PARALLAX
   ========================================================================== */
.reveal{ opacity:0; transform:translateY(36px); transition:opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-visible{ opacity:1; transform:translateY(0); }
.reveal-delay-1.is-visible{ transition-delay:.12s; }
.reveal-delay-2.is-visible{ transition-delay:.24s; }
.reveal-delay-3.is-visible{ transition-delay:.36s; }

.ridge-divider{ position:relative; height:90px; overflow:hidden; }
.ridge-divider svg{ width:100%; height:100%; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{ background: var(--forest-dark); color: var(--mist-light); padding-top:90px; }
.footer-top{ display:grid; gap:50px; grid-template-columns:1fr; padding-bottom:70px; border-bottom:1px solid rgba(247,243,234,.1); }
@media(min-width:860px){ .footer-top{ grid-template-columns:1.4fr 1fr 1fr 1fr; } }
.footer-brand .brand-word{ color:#fff; }
.footer-brand .brand-word span{ color: var(--mist-light); }
.footer-brand p{ margin-top:20px; color: var(--mist-light); font-size:.9rem; max-width:34ch; }
.footer-col h4{ font-family: var(--font-ui); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color: var(--sun); margin-bottom:20px; }
.footer-col a{ display:block; font-size:.88rem; color: var(--mist-light); padding:6px 0; transition:color .3s, padding-left .3s; }
.footer-col a:hover{ color:#fff; padding-left:4px; }
.footer-bottom{ display:flex; flex-direction:column; gap:14px; align-items:flex-start; padding:30px 0 40px; font-size:.78rem; color: rgba(205,218,222,.65); }
@media(min-width:768px){ .footer-bottom{ flex-direction:row; align-items:center; justify-content:space-between; } }
.footer-bottom .legal-links{ display:flex; gap:20px; }
.footer-social{ display:flex; gap:14px; margin-top:22px; }
.footer-social a{ width:38px; height:38px; border:1px solid rgba(247,243,234,.2); border-radius:50%; display:flex; align-items:center; justify-content:center; transition:.35s; }
.footer-social a:hover{ background: var(--sun); border-color: var(--sun); color:var(--forest-dark); }

/* 404 */
.err-wrap{ min-height:100vh; display:flex; align-items:center; justify-content:center; text-align:center; position:relative; overflow:hidden; }
.err-num{ font-family: var(--font-display); font-size:clamp(6rem,20vw,14rem); line-height:.9; color:#fff; letter-spacing:-.02em; }

.marquee-strip{ background: var(--forest); padding:16px 0; overflow:hidden; white-space:nowrap; }
.marquee-strip .track{ display:inline-flex; gap:40px; animation: marquee 28s linear infinite; }
.marquee-strip span{ font-family: var(--font-ui); font-size:.78rem; letter-spacing:.14em; color: var(--beige); text-transform:uppercase; }
@keyframes marquee{ from{ transform:translateX(0);} to{ transform:translateX(-50%);} }

@media(prefers-reduced-motion: reduce){
  *{ animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; scroll-behavior:auto !important; }
}