/* THE-IF corporate site — draft styles (mobile-first, dark ambient) */

:root{
  --ink:        #0a0a0b;
  --ink-2:      #08080a;
  --paper:      #ece7dd;
  --paper-dim:  rgba(236, 231, 221, .60);
  --paper-faint:rgba(236, 231, 221, .34);
  --amber:      #d8b877;
  --amber-deep: #c9a15a;
  --line:       rgba(236, 231, 221, .14);

  --serif:  'Cormorant', 'Zen Old Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', Georgia, serif;
  --mincho: 'Zen Old Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --sans:   system-ui, -apple-system, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;

  --pad:    clamp(20px, 6vw, 64px);
  --maxw:   980px;
}

*{ box-sizing: border-box; margin: 0; padding: 0; }
html{ -webkit-text-size-adjust: 100%; }
body{
  font-family: var(--sans);
  color: var(--paper);
  background:
    radial-gradient(120% 80% at 50% 34%, rgba(60,42,20,.35), transparent 60%),
    var(--ink);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a{ color: inherit; text-decoration: none; }
::selection{ background: rgba(216,184,119,.28); }

/* ---- WebGL backdrop ---- */
#gl{
  position: fixed; inset: 0;
  width: 100vw; height: 100svh; height: 100vh;
  display: block; z-index: 0;
  touch-action: pan-y;
}
html.no-gl #gl{ display: none; }
.scrim{
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, rgba(6,6,8,.55) 0%, transparent 22%, transparent 78%, rgba(6,6,8,.6) 100%);
}

/* ---- loader ---- */
.loader{
  position: fixed; inset: 0; z-index: 60;
  display: grid; place-items: center;
  background: var(--ink);
  transition: opacity .9s ease .15s, visibility .9s;
}
.loader span{
  font-family: var(--serif); font-weight: 300;
  letter-spacing: .3em; font-size: clamp(20px, 6vw, 30px);
  color: var(--paper-dim);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ opacity:.35 } 50%{ opacity:.9 } }
html.ready .loader{ opacity: 0; visibility: hidden; }

/* ---- content sits above canvas ---- */
.topbar, main, .footer{ position: relative; z-index: 2; }

/* ---- top bar ---- */
.topbar{
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  padding: clamp(14px, 3vw, 22px) var(--pad);
  mix-blend-mode: normal;
}
.wordmark{
  font-family: var(--serif); font-weight: 400;
  letter-spacing: .22em; font-size: clamp(15px, 2.6vw, 18px);
  color: var(--paper);
}
.nav{ display: flex; gap: clamp(16px, 2.4vw, 30px); align-items: center; }
.nav a{
  font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--paper-dim); transition: color .3s;
}
.nav a:hover{ color: var(--paper); }
.nav-cta{
  color: var(--paper) !important;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 16px;
}
.nav a:not(.nav-cta){ display: none; }
@media (min-width: 760px){ .nav a:not(.nav-cta){ display: inline; } }

/* ---- hero ---- */
.hero{
  min-height: 100svh; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 var(--pad);
}
.hero-inner{
  transform: translateY(calc(var(--sink, 0) * -10vh));
  opacity: calc(1 - var(--sink, 0) * .92);
  filter: blur(calc(var(--sink, 0) * 4px));
  will-change: transform, opacity;
}
.eyebrow{
  font-size: 12px; letter-spacing: .34em; text-transform: uppercase;
  color: var(--amber); margin-bottom: clamp(18px, 4vw, 30px);
}
.hero-title{
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(44px, 13vw, 128px); line-height: .98;
  letter-spacing: -.01em;
  text-shadow: 0 2px 40px rgba(0,0,0,.5);
}
.hero-sub{
  font-family: var(--mincho); font-weight: 400;
  margin-top: clamp(18px, 4vw, 28px);
  font-size: clamp(16px, 4.2vw, 24px); letter-spacing: .18em;
  color: var(--paper-dim);
}
.cue{
  position: absolute; left: 50%; bottom: clamp(22px, 5vh, 40px);
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  background: none; border: 0; cursor: pointer; color: var(--paper-dim);
  opacity: calc(1 - var(--sink, 0) * 1.4);
}
.cue-label{ font-size: 11px; letter-spacing: .24em; text-transform: uppercase; }
.cue-arrow{
  width: 1px; height: 46px;
  background: linear-gradient(180deg, transparent, var(--amber));
  animation: drip 2.4s ease-in-out infinite;
}
@keyframes drip{ 0%{ transform: scaleY(.4); transform-origin: top; opacity:.3 } 50%{ transform: scaleY(1); opacity:1 } 100%{ transform: scaleY(.4); transform-origin: bottom; opacity:.3 } }

/* ---- panels ---- */
.panel{
  padding: clamp(84px, 16vh, 190px) var(--pad);
  background: linear-gradient(180deg, rgba(8,8,10,.0), rgba(8,8,10,.72) 12%, rgba(8,8,10,.72) 88%, rgba(8,8,10,0));
}
.panel + .panel{ background: linear-gradient(180deg, rgba(8,8,10,.72), rgba(8,8,10,.74)); }
.wrap{ max-width: var(--maxw); margin: 0 auto; }
.kicker{
  font-size: 12px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--amber); margin-bottom: clamp(22px, 5vw, 40px);
}

/* story */
.lede{
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(26px, 6.4vw, 52px); line-height: 1.14; letter-spacing: -.005em;
}
.lede-ja{
  font-family: var(--mincho);
  font-size: clamp(15px, 3.6vw, 21px); line-height: 2; letter-spacing: .06em;
  color: var(--paper-dim);
  margin-top: clamp(26px, 5vw, 40px);
}
.note{
  margin-top: clamp(34px, 7vw, 56px); max-width: 46ch;
  color: var(--paper-dim); font-size: clamp(14px, 3.6vw, 16px);
}
.note span{ display: block; margin-top: 12px; font-family: var(--mincho); letter-spacing: .04em; }

/* services */
.services{ list-style: none; display: grid; gap: clamp(30px, 6vw, 20px); }
@media (min-width: 820px){ .services{ grid-template-columns: repeat(3, 1fr); gap: 40px; } }
.service{ border-top: 1px solid var(--line); padding-top: 22px; }
.service .idx{ font-size: 12px; letter-spacing: .2em; color: var(--amber); }
.service h2{
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(28px, 7vw, 34px); line-height: 1.05; margin-top: 14px;
}
.svc-ja{ font-family: var(--mincho); color: var(--paper-dim); letter-spacing: .1em; margin-top: 8px; font-size: 14px; }
.svc-desc{ margin-top: 16px; color: var(--paper-dim); font-size: 14.5px; max-width: 32ch; }

/* section titles */
.section-title, .contact-title{
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(30px, 8vw, 60px); line-height: 1.06; letter-spacing: -.01em;
}
.section-ja, .contact-ja{ font-family: var(--mincho); color: var(--paper-dim); margin-top: 18px; letter-spacing: .1em; }

/* clients / logo wall */
.logo-wall{
  list-style: none; margin-top: clamp(36px, 7vw, 56px);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
}
.logo{
  aspect-ratio: 3 / 2; background: rgba(12,12,14,.55);
  display: grid; grid-template: 1fr / 1fr; place-items: center;
  padding: 9% 10%; cursor: pointer;
  transition: background-color .4s ease;
}
.logo-mark, .logo-color{ grid-area: 1 / 1; width: 100%; height: 100%; }
/* default: warm monochrome silhouette (alpha-masked, filled paper tone) */
.logo-mark{
  background: var(--paper); opacity: .58;
  -webkit-mask: var(--m) center / contain no-repeat;
          mask: var(--m) center / contain no-repeat;
  transition: opacity .4s ease;
}
/* hover / focus / tap: light plaque + original brand colors */
.logo-color{ object-fit: contain; opacity: 0; transition: opacity .4s ease; }
.logo:hover, .logo:focus-visible, .logo:active{ background: var(--paper); outline: none; }
.logo:hover .logo-mark, .logo:focus-visible .logo-mark, .logo:active .logo-mark{ opacity: 0; }
.logo:hover .logo-color, .logo:focus-visible .logo-color, .logo:active .logo-color{ opacity: 1; }
.logo:focus-visible{ box-shadow: inset 0 0 0 2px var(--amber-deep); }
@media (max-width: 400px){ .logo{ padding: 11% 9%; } }

/* studio */
.studio-desc{ margin-top: 26px; max-width: 40ch; color: var(--paper-dim); }
.ghost-link{
  margin-top: 40px; display: inline-flex; align-items: baseline; gap: 12px;
  font-family: var(--serif); font-size: clamp(22px, 5vw, 30px); color: var(--paper);
  border-bottom: 1px solid var(--line); padding-bottom: 8px; transition: border-color .3s;
}
.ghost-link:hover{ border-color: var(--amber); }
.ghost-link em{ font-family: var(--sans); font-style: normal; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--amber); }

/* contact */
.contact{ text-align: left; }
.mailto{
  display: inline-block; margin-top: clamp(30px, 6vw, 48px);
  font-family: var(--serif); font-size: clamp(22px, 6vw, 40px);
  color: var(--paper); border-bottom: 1px solid var(--amber-deep); padding-bottom: 6px;
  transition: color .3s;
}
.mailto:hover{ color: var(--amber); }

/* footer */
.footer{ padding: clamp(40px, 8vw, 70px) var(--pad); background: var(--ink-2); border-top: 1px solid var(--line); }
.foot-grid{ display: flex; flex-wrap: wrap; gap: 10px 28px; align-items: baseline; }
.foot-mark{ font-family: var(--serif); letter-spacing: .22em; font-size: 16px; }
.foot-meta{ font-size: 12px; color: var(--paper-faint); letter-spacing: .06em; }

/* ---- reveal ---- */
.reveal{ opacity: 0; transform: translateY(20px); transition: opacity 1s cubic-bezier(.2,.7,.2,1), transform 1s cubic-bezier(.2,.7,.2,1); }
.reveal.in{ opacity: 1; transform: none; }
.services .service:nth-child(2).in{ transition-delay: .08s; }
.services .service:nth-child(3).in{ transition-delay: .16s; }

@media (prefers-reduced-motion: reduce){
  .reveal{ opacity: 1; transform: none; transition: none; }
  .cue-arrow, .loader span{ animation: none; }
  .hero-inner{ filter: none; }
  * { scroll-behavior: auto !important; }
}