/* ============================================================
   TRIMIX Design System v1
   concept: WEB × APPS × AI — 技術を掛け合わせて、ひとつのプロダクトに
   ============================================================ */

/* ---- tokens: light (default) ---- */
:root {
  --bg:        #F4F5F7;
  --bg-elev:   #FFFFFF;
  --bg-sunken: #EAECF1;
  --text:      #14171E;
  --text-muted:#565E6C;
  --border:      rgba(20,24,32,0.12);
  --border-strong: rgba(20,24,32,0.24);
  --accent:    #3B63E6;  /* electric blue */
  --accent-2:  #E1552F;  /* coral         */
  --accent-3:  #0E9E8E;  /* aqua          */
  --accent-soft: rgba(59,99,230,0.10);
  --hero-alpha: 0.42;
  --shadow: 0 1px 2px rgba(20,24,32,0.04), 0 12px 40px rgba(20,24,32,0.07);

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;

  --maxw: 1140px;
  --pad: clamp(1.25rem, 5vw, 3rem);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0D1117;
    --bg-elev:   #141A23;
    --bg-sunken: #090C11;
    --text:      #EDEFF4;
    --text-muted:#98A2B3;
    --border:      rgba(237,239,244,0.11);
    --border-strong: rgba(237,239,244,0.24);
    --accent:    #6E8DFF;
    --accent-2:  #FF7A5A;
    --accent-3:  #31E1C4;
    --accent-soft: rgba(110,141,255,0.14);
    --hero-alpha: 0.55;
    --shadow: 0 1px 2px rgba(0,0,0,0.4), 0 18px 50px rgba(0,0,0,0.5);
  }
}
:root[data-theme="light"] {
  --bg:#F4F5F7; --bg-elev:#FFFFFF; --bg-sunken:#EAECF1;
  --text:#14171E; --text-muted:#565E6C;
  --border:rgba(20,24,32,0.12); --border-strong:rgba(20,24,32,0.24);
  --accent:#3B63E6; --accent-2:#E1552F; --accent-3:#0E9E8E;
  --accent-soft:rgba(59,99,230,0.10); --hero-alpha:0.42;
  --shadow:0 1px 2px rgba(20,24,32,0.04), 0 12px 40px rgba(20,24,32,0.07);
}
:root[data-theme="dark"] {
  --bg:#0D1117; --bg-elev:#141A23; --bg-sunken:#090C11;
  --text:#EDEFF4; --text-muted:#98A2B3;
  --border:rgba(237,239,244,0.11); --border-strong:rgba(237,239,244,0.24);
  --accent:#6E8DFF; --accent-2:#FF7A5A; --accent-3:#31E1C4;
  --accent-soft:rgba(110,141,255,0.14); --hero-alpha:0.55;
  --shadow:0 1px 2px rgba(0,0,0,0.4), 0 18px 50px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--sans); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }
.visually-hidden { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0; }

.eyebrow {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--text-muted); display: inline-flex; align-items: center; gap: 0.6em; margin: 0 0 1.1rem;
}
.eyebrow::before { content:""; width:1.6rem; height:1px; background:var(--accent); display:inline-block; }

/* ---- brand mark (isometric cube) ---- */
.mark { display:inline-block; width:24px; height:24px; vertical-align:middle; }

/* ============================================================ NAV */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent; transition: border-color .3s ease, background .3s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav__in { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-family: var(--mono); font-weight: 700; letter-spacing: 0.14em; font-size: 0.95rem; }
.nav__links { display: flex; gap: 1.6rem; align-items: center; }
.nav__links a.navlink {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-muted); transition: color .18s ease; position: relative;
}
.nav__links a.navlink:hover { color: var(--text); }
.nav__links a.navlink::after { content:""; position:absolute; left:0; bottom:-6px; height:1px; width:0; background:var(--accent); transition:width .22s ease; }
.nav__links a.navlink:hover::after { width:100%; }
.nav__cta {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.5rem 0.95rem; border: 1px solid var(--border-strong); border-radius: 6px;
  color: var(--text); transition: border-color .2s, background .2s;
}
.nav__cta:hover { border-color: var(--accent); background: var(--accent-soft); }

.lang { display:inline-flex; align-items:center; gap:0.35rem; padding-left:0.5rem; margin-left:0.2rem; border-left:1px solid var(--border); }
.lang__opt { font-family:var(--mono); font-size:0.72rem; letter-spacing:0.1em; color:var(--text-muted); padding:0.2rem 0.15rem; transition:color .18s; }
.lang__opt.is-active { color:var(--text); }
.lang__opt:hover { color:var(--accent); }
.lang__sep { color:var(--border-strong); font-family:var(--mono); font-size:0.72rem; }
@media (max-width: 720px) { .nav__links a.navlink { display:none; } }

/* ============================================================ HERO */
.hero { position: relative; padding-top: 62px; overflow: hidden; }
.hero__canvas { position:absolute; inset:0; width:100%; height:100%; z-index:0; pointer-events:none; }
.hero__grid {
  position:absolute; inset:0; z-index:0; pointer-events:none;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%); opacity:.5;
}
.hero__in { position: relative; z-index: 2; padding: clamp(4.5rem, 13vh, 9rem) 0 clamp(3.5rem, 9vh, 6rem); }
.hero__kicker { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 1.6rem; display:flex; align-items:center; gap:0.8rem; flex-wrap:wrap; }
.hero__kicker b { color: var(--text); font-weight: 600; }
h1.hero__title { font-size: clamp(2.5rem, 6.4vw, 5rem); line-height: 1.04; letter-spacing: -0.02em; font-weight: 800; margin: 0 0 1.6rem; max-width: 18ch; text-wrap: balance; }
.hero__title .mix { color: var(--accent); }
.hero__lead { font-size: clamp(1.02rem, 1.5vw, 1.2rem); color: var(--text-muted); max-width: 48ch; margin: 0 0 2.4rem; line-height: 1.85; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; }

.btn { display: inline-flex; align-items: center; gap: 0.55rem; font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.85rem 1.4rem; border-radius: 7px; border: 1px solid transparent; cursor: pointer; transition: transform .16s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease; }
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 6px 24px var(--accent-soft); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--accent-soft); }
.btn--ghost { border-color: var(--border-strong); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.btn .arrow { transition: transform .18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.hero__meta { margin-top: clamp(3rem, 7vh, 5rem); display: flex; flex-wrap: wrap; gap: 0.5rem 2.2rem; font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.08em; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 1.4rem; }
.hero__meta span b { color: var(--text); font-weight: 600; }

/* ============================================================ SECTIONS */
section { position: relative; }
.band { padding: clamp(4.5rem, 11vh, 8rem) 0; }
.band--sunken { background: var(--bg-sunken); }
.sec-head { max-width: 52ch; margin-bottom: clamp(2.4rem, 5vw, 3.5rem); }
h2.sec-title { font-size: clamp(1.8rem, 3.6vw, 2.7rem); line-height: 1.12; letter-spacing: -0.015em; font-weight: 800; margin: 0 0 1rem; text-wrap: balance; }
.sec-desc { color: var(--text-muted); font-size: 1.03rem; margin: 0; max-width: 50ch; }

.products { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
@media (max-width: 820px) { .products { grid-template-columns: 1fr; } }
.pcard { position: relative; background: var(--bg-elev); border: 1px solid var(--border); border-radius: 14px; padding: clamp(1.6rem, 3vw, 2.3rem); overflow: hidden; display: flex; flex-direction: column; gap: 1.15rem; transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
.pcard::before { content:""; position:absolute; inset:0 auto 0 0; width:3px; background:var(--tone); opacity:0; transition:opacity .22s ease; }
.pcard:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.pcard:hover::before { opacity: 1; }
.pcard[data-tone="aqua"]  { --tone: var(--accent-3); }
.pcard[data-tone="coral"] { --tone: var(--accent-2); }
.pcard__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.pcard__name { font-family: var(--mono); font-size: 1.35rem; font-weight: 700; letter-spacing: 0.01em; }
.pcard__glyph { width: 42px; height: 42px; border-radius: 10px; flex: none; display: grid; place-items: center; color: #fff; background: color-mix(in srgb, var(--tone) 88%, #000 4%); font-family: var(--mono); font-weight: 700; font-size: 1.05rem; }
.badges { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.badge { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em; padding: 0.28rem 0.6rem; border-radius: 999px; border: 1px solid var(--border-strong); color: var(--text-muted); }
.pcard__tag { font-weight: 700; font-size: 1.06rem; margin: 0; }
.pcard__desc { color: var(--text-muted); font-size: 0.96rem; margin: 0; line-height: 1.8; }
.pcard__desc code { font-family: var(--mono); font-size: 0.86em; padding: 0.05em 0.35em; border-radius: 4px; background: var(--bg-sunken); }
.pcard__links { display: flex; gap: 1.2rem; margin-top: auto; padding-top: 0.4rem; flex-wrap: wrap; }
.plink { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text); display: inline-flex; align-items: center; gap: 0.4rem; border-bottom: 1px solid var(--border-strong); padding-bottom: 2px; transition: color .18s, border-color .18s; }
.plink:hover { color: var(--tone); border-color: var(--tone); }

.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
@media (max-width: 900px) { .services { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .services { grid-template-columns: 1fr; } }
.scard { background: var(--bg-elev); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem 1.35rem; display: flex; flex-direction: column; gap: 0.7rem; min-height: 100%; transition: transform .2s ease, border-color .2s ease; }
.scard:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.scard__no { font-family: var(--mono); font-size: 0.72rem; color: var(--accent); letter-spacing: 0.1em; }
.scard__t { font-size: 1.08rem; font-weight: 700; margin: 0; }
.scard__d { font-size: 0.9rem; color: var(--text-muted); margin: 0; line-height: 1.75; }

.studio { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(2rem,5vw,4rem); align-items: start; }
@media (max-width: 820px) { .studio { grid-template-columns: 1fr; } }
.studio__body p { color: var(--text-muted); font-size: 1.03rem; line-height: 1.9; }
.studio__body p + p { margin-top: 1.1rem; }
.facts { display: grid; gap: 0.9rem; margin: 0; }
.fact { display: flex; justify-content: space-between; gap: 1rem; padding: 0.95rem 0; border-bottom: 1px solid var(--border); }
.fact:first-child { border-top: 1px solid var(--border); }
.fact dt { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin: 0; }
.fact dd { margin: 0; font-weight: 600; text-align: right; }

.contact { text-align: center; max-width: 44ch; margin-inline: auto; }
.contact h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.02em; font-weight: 800; margin: 0 0 1rem; text-wrap: balance; }
.contact p { color: var(--text-muted); margin: 0 0 2rem; }
.contact__cta { font-family: var(--mono); font-size: clamp(1.05rem, 2.6vw, 1.5rem); font-weight: 600; display: inline-flex; align-items: center; gap: 0.6rem; border-bottom: 2px solid var(--accent); padding-bottom: 4px; transition: opacity .2s; }
.contact__cta:hover { opacity: 0.72; }
.contact__alt { margin-top: 1.6rem; font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--text-muted); }

.foot { border-top: 1px solid var(--border); padding: 2.2rem 0; }
.foot__in { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.06em; color: var(--text-muted); }
.foot__in a:hover { color: var(--text); }

/* ---- scroll reveal ---- */
.js-anim .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.js-anim .reveal.is-visible { opacity: 1; transform: none; }
.js-anim .reveal.d1 { transition-delay: .08s; }
.js-anim .reveal.d2 { transition-delay: .16s; }
.js-anim .reveal.d3 { transition-delay: .24s; }

/* 404 */
.notfound { min-height: 78vh; display: grid; place-items: center; text-align: center; padding: 6rem 1.5rem; }
.notfound__code { font-family: var(--mono); font-size: clamp(3rem,10vw,6rem); font-weight: 800; letter-spacing: 0.04em; margin: 0 0 0.6rem; }
.notfound__code .mix { color: var(--accent); }
.notfound p { color: var(--text-muted); margin: 0 0 2rem; }