/* ============================================================
   Ryo Sato — Portfolio
   Cool monochrome (near-black × white × single blue accent)
   ============================================================ */

:root{
  --bg:#0b0d12;
  --bg-2:#12151d;
  --panel:#161a24;
  --ink:#e8ebf3;
  --ink-dim:rgba(232,235,243,.62);
  --ink-faint:rgba(232,235,243,.34);
  --line:rgba(232,235,243,.10);
  --line-strong:rgba(232,235,243,.22);
  --blue:#5b8dff;
  --blue-2:#8ab0ff;
  --blue-soft:rgba(91,141,255,.16);
  --sans:"Zen Kaku Gothic New", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --mono:"Inter", ui-monospace, "SF Mono", Menlo, monospace;
  --display:"Inter", "Zen Kaku Gothic New", sans-serif;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --ease-out:cubic-bezier(0.22,1,0.36,1);
  --maxw:1120px;
  --pad-x:clamp(20px,5vw,44px);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:geometricPrecision;
  overflow-x:hidden;
  font-size:15px;
}

a{color:inherit;text-decoration:none;}
::selection{background:var(--blue);color:#fff;}

/* Ambient blue glow — very subtle */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(60% 40% at 100% 0%, rgba(91,141,255,.06), transparent 70%),
    radial-gradient(50% 40% at 0% 100%, rgba(91,141,255,.04), transparent 70%);
}
main,.nav,.foot{position:relative;z-index:1;}

/* ===== Scroll progress ===== */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:100;
  background:linear-gradient(90deg,var(--blue),var(--blue-2));
  box-shadow:0 0 12px rgba(91,141,255,.6);
  transition:width .1s linear;
}

/* ===== Nav ===== */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  padding:16px var(--pad-x);
  background:rgba(11,13,18,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .35s var(--ease),background .35s var(--ease);
}
.nav.scrolled{border-bottom-color:var(--line);background:rgba(11,13,18,.92);}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:.78rem;font-weight:700;letter-spacing:.22em;
  white-space:nowrap;flex:0 0 auto;
}
.brand-name{white-space:nowrap;}
.brand-mark{
  width:12px;height:12px;background:var(--blue);flex:0 0 auto;
  box-shadow:0 0 0 2px rgba(91,141,255,.18);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
  animation:mark-pulse 3.6s ease-in-out infinite;
}
.brand:hover .brand-mark{
  transform:rotate(90deg);
  box-shadow:0 0 0 4px rgba(91,141,255,.28),0 0 22px rgba(91,141,255,.35);
}
@keyframes mark-pulse{
  0%,100%{box-shadow:0 0 0 2px rgba(91,141,255,.18);}
  50%{box-shadow:0 0 0 3px rgba(91,141,255,.30),0 0 16px rgba(91,141,255,.22);}
}

.nav-index{display:flex;align-items:center;gap:clamp(12px,2.4vw,28px);flex-wrap:nowrap;}
.nav-index a{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;
  color:var(--ink-dim);font-weight:500;
  display:inline-flex;align-items:baseline;gap:6px;
  transition:color .25s var(--ease);white-space:nowrap;
  position:relative;padding-bottom:6px;
}
.nav-index a .n{
  font-size:.62rem;color:var(--ink-faint);font-weight:600;letter-spacing:.1em;
  transition:color .25s var(--ease);
}
.nav-index a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--blue);transition:width .3s var(--ease);
}
.nav-index a:hover,.nav-index a.active{color:var(--ink);}
.nav-index a:hover .n,.nav-index a.active .n{color:var(--blue);}
.nav-index a:hover::after,.nav-index a.active::after{width:100%;}

@media(max-width:640px){
  .nav{padding:12px 16px;gap:8px;}
  .brand{font-size:.68rem;letter-spacing:.14em;gap:8px;}
  .brand-mark{width:10px;height:10px;}
  .nav-index{gap:16px;}
  .nav-index a{padding-bottom:0;}
  .nav-index a .l{display:none;}
  .nav-index a .n{font-size:.72rem;color:var(--ink-dim);}
  .nav-index a.active .n{color:var(--blue);}
  .nav-index a::after{display:none;}
}

/* ===== Sections common ===== */
main{position:relative;z-index:1;}
.section{
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(80px,12vh,140px) var(--pad-x);
  border-top:1px solid var(--line);
}
.sec-head{
  display:flex;align-items:baseline;gap:16px;
  margin-bottom:clamp(36px,6vh,64px);
}
.sec-num{
  font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.22em;
  color:var(--blue);position:relative;
}
.sec-title{
  font-family:var(--display);font-size:clamp(1.4rem,3vw,1.8rem);
  font-weight:700;letter-spacing:-.01em;line-height:1;
  display:inline-flex;align-items:center;gap:14px;
}
.sec-title-text{display:inline-block;}
.sec-title-line{
  display:inline-block;height:1px;width:0;background:var(--blue);
  transition:width 1s var(--ease-out) .1s;
}
html.js .reveal.in .sec-title-line{width:clamp(40px,10vw,90px);}

/* ===== Hero ===== */
.hero{
  min-height:calc(100dvh - 60px);
  display:flex;align-items:center;
  padding:clamp(48px,10vh,120px) var(--pad-x) clamp(60px,10vh,100px);
  max-width:var(--maxw);margin:0 auto;
  position:relative;
}
.hero-inner{max-width:920px;position:relative;z-index:2;}

.hero-meta{
  font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.28em;
  color:var(--ink-faint);margin-bottom:clamp(28px,5vh,44px);
  display:inline-flex;align-items:center;gap:10px;
}
.meta-dot{
  width:6px;height:6px;border-radius:50%;background:var(--blue);
  box-shadow:0 0 8px var(--blue);animation:meta-blink 2.2s infinite;
}
@keyframes meta-blink{0%,100%{opacity:1}50%{opacity:.35}}

.hero-name{
  font-family:var(--display);
  font-size:clamp(3.2rem,12vw,9rem);
  font-weight:900;
  line-height:.95;letter-spacing:-.045em;
  margin-bottom:clamp(28px,5vh,44px);
  display:flex;flex-wrap:wrap;
}
.hero-name .ch{
  display:inline-block;
  opacity:0;transform:translateY(0.7em) rotate(2deg);
  will-change:transform,opacity;
}
.hero-name .ch-space{display:inline-block;width:.28em;}
html.js body.ready .hero-name .ch{
  animation:letter-in .95s var(--ease-out) forwards;
  animation-delay:calc(.15s + var(--i) * .06s);
}
@keyframes letter-in{
  0%{opacity:0;transform:translateY(0.7em) rotate(2deg);}
  60%{opacity:1;}
  100%{opacity:1;transform:none;}
}

.hero-line{
  width:0;height:2px;background:var(--blue);
  margin-bottom:clamp(28px,5vh,42px);
  transition:width 1.2s var(--ease-out);
  box-shadow:0 0 12px rgba(91,141,255,.6);
}
html.js body.ready .hero-line{width:min(140px,40vw);}

.hero-jump{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:.82rem;font-weight:600;letter-spacing:.14em;
  padding:14px 22px;
  border:1px solid var(--line-strong);
  color:var(--ink);position:relative;overflow:hidden;
  transition:border-color .3s var(--ease),color .3s var(--ease);
}
.hero-jump::before{
  content:"";position:absolute;inset:0;background:var(--blue);
  transform:translateX(-101%);transition:transform .45s var(--ease-out);z-index:-1;
}
.hero-jump:hover{border-color:var(--blue);color:#fff;}
.hero-jump:hover::before{transform:translateX(0);}
.hero-jump .arrow{
  color:var(--blue);transition:transform .35s var(--ease),color .3s var(--ease);
}
.hero-jump:hover .arrow{transform:translateY(3px);color:#fff;}

.hero-scroll{
  position:absolute;right:var(--pad-x);bottom:32px;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;
  color:var(--ink-faint);
}
.hero-scroll-line{
  width:1px;height:56px;background:linear-gradient(180deg,var(--ink-faint),transparent);
  position:relative;overflow:hidden;
}
.hero-scroll-line::after{
  content:"";position:absolute;top:-20px;left:0;width:100%;height:20px;
  background:linear-gradient(180deg,transparent,var(--blue));
  animation:scroll-tick 2.4s ease-in-out infinite;
}
@keyframes scroll-tick{
  0%{transform:translateY(0);opacity:0;}
  20%{opacity:1;}
  100%{transform:translateY(76px);opacity:0;}
}
@media(max-width:760px){.hero-scroll{display:none;}}

/* ===== About ===== */
.about-grid{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:clamp(28px,5vw,72px);align-items:start;
}
@media(max-width:760px){.about-grid{grid-template-columns:1fr;gap:36px;}}
.about-body{display:flex;flex-direction:column;gap:clamp(24px,4vh,36px);min-width:0;}
.about-text{
  font-size:clamp(1rem,1.4vw,1.15rem);line-height:1.95;color:var(--ink);
  max-width:36em;
}
.portrait{
  position:relative;aspect-ratio:4/5;overflow:hidden;
  background:var(--bg-2);
  transform:translateY(0);
  transition:transform .8s var(--ease-out);
}
.portrait img{
  width:100%;height:100%;object-fit:cover;object-position:56% 32%;
  display:block;
  filter:grayscale(15%) contrast(1.02);
  transition:transform 1.4s var(--ease-out),filter .8s var(--ease);
  transform:scale(1.04);
}
.portrait:hover img{transform:scale(1.06);filter:grayscale(0%) contrast(1.02);}
.portrait-frame{
  position:absolute;inset:0;pointer-events:none;
  border:1px solid var(--line-strong);
  box-shadow:inset 0 0 0 0 var(--blue);
  transition:box-shadow .6s var(--ease);
}
.portrait:hover .portrait-frame{box-shadow:inset 0 0 0 2px var(--blue);}
/* Portrait reveal — add a subtle sweep in */
html.js .portrait.reveal{opacity:0;transform:translateY(28px);}
html.js .portrait.reveal.in{opacity:1;transform:none;}
@media(max-width:760px){
  .portrait{aspect-ratio:5/4;max-width:520px;}
}
.fact-list{
  display:grid;gap:1px;background:var(--line);
  border:1px solid var(--line);
}
.fact-list > div{
  display:grid;grid-template-columns:96px 1fr;gap:16px;
  padding:14px 18px;background:var(--bg);
  transition:background .3s var(--ease);
}
.fact-list > div:hover{background:var(--bg-2);}
.fact-list dt{
  font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.16em;
  color:var(--ink-faint);text-transform:uppercase;padding-top:2px;
}
.fact-list dd{font-size:.95rem;color:var(--ink);}

/* ===== Works ===== */
.works-list{list-style:none;display:flex;flex-direction:column;}
.work{
  display:grid;grid-template-columns:88px 1fr;gap:clamp(20px,3.4vw,44px);
  padding:clamp(28px,4vh,42px) 0;
  border-top:1px solid var(--line);
  align-items:start;
  position:relative;
}
.work:first-child{border-top:0;padding-top:0;}
.work::before{
  content:"";position:absolute;left:0;top:-1px;height:1px;width:0;
  background:var(--blue);transition:width .8s var(--ease-out);
}
html.js .work.reveal.in::before{width:64px;}
.work:first-child::before{display:none;}

.work-idx{
  font-family:var(--mono);font-size:.72rem;font-weight:600;letter-spacing:.22em;
  color:var(--ink-faint);padding-top:6px;transition:color .3s var(--ease);
}
.work:hover .work-idx{color:var(--blue);}
.work-title{
  font-family:var(--display);font-size:clamp(1.35rem,2.6vw,1.75rem);
  font-weight:700;letter-spacing:-.01em;line-height:1.2;
  margin-bottom:6px;
  display:flex;flex-wrap:wrap;align-items:baseline;gap:14px;
}
.work-link{
  display:inline-flex;align-items:baseline;gap:5px;
  font-family:var(--mono);font-size:.7rem;font-weight:500;letter-spacing:.06em;
  color:var(--blue);
  padding:3px 0;border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.work-link .ext{transition:transform .25s var(--ease);}
.work-link:hover{border-bottom-color:var(--blue);}
.work-link:hover .ext{transform:translate(2px,-2px);}
.work-role{
  font-family:var(--mono);font-size:.7rem;font-weight:500;letter-spacing:.16em;
  color:var(--blue);text-transform:uppercase;margin-bottom:14px;
}
.work-desc{color:var(--ink-dim);max-width:42em;line-height:1.85;font-size:.98rem;}

@media(max-width:640px){
  .work{grid-template-columns:1fr;gap:10px;}
  .work-idx{padding-top:0;}
  .work-title{gap:10px;}
}

/* ===== Record ===== */
.record-list{list-style:none;display:flex;flex-direction:column;}
.rec{
  display:grid;grid-template-columns:88px 1fr auto;gap:clamp(16px,3vw,28px);
  padding:22px 0;border-top:1px solid var(--line);align-items:start;
  transition:padding-left .3s var(--ease);
}
.rec:first-child{border-top:0;padding-top:0;}
.rec:hover{padding-left:6px;}
.rec-date{
  font-family:var(--mono);font-size:.78rem;font-weight:600;letter-spacing:.06em;
  color:var(--ink);padding-top:4px;
}
.rec-body h3{
  font-family:var(--display);font-size:1.05rem;font-weight:600;
  line-height:1.4;margin-bottom:4px;letter-spacing:-.005em;
}
.rec-body p{color:var(--ink-dim);font-size:.92rem;line-height:1.7;}
.rec-body a{
  color:var(--blue);border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease);
}
.rec-body a:hover{border-bottom-color:var(--blue);}
.rec-tag{
  font-family:var(--mono);font-size:.62rem;font-weight:600;letter-spacing:.16em;
  color:var(--ink-faint);text-transform:uppercase;
  padding:4px 8px;border:1px solid var(--line-strong);border-radius:2px;
  align-self:flex-start;white-space:nowrap;margin-top:4px;
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.rec:hover .rec-tag{color:var(--blue);border-color:var(--blue);}
@media(max-width:640px){
  .rec{grid-template-columns:auto 1fr;gap:14px;}
  .rec-tag{grid-column:1 / -1;justify-self:start;margin-top:8px;}
}

/* ===== Contact form ===== */
.contact{padding-bottom:clamp(60px,10vh,120px);}
.cform{
  max-width:640px;display:grid;gap:22px;
}
.cf-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
@media(max-width:540px){.cf-row{grid-template-columns:1fr;}}
.cf-field{display:block;position:relative;}
.cf-label{
  display:block;
  font-family:var(--mono);font-size:.68rem;font-weight:600;letter-spacing:.18em;
  color:var(--ink-faint);text-transform:uppercase;margin-bottom:8px;
}
.cf-field input,.cf-field textarea{
  width:100%;background:transparent;color:var(--ink);
  font-family:var(--sans);font-size:1rem;line-height:1.6;
  border:0;border-bottom:1px solid var(--line-strong);
  padding:10px 2px;
  transition:border-color .25s var(--ease);
  outline:none;resize:vertical;
}
.cf-field textarea{min-height:120px;}
.cf-field input:focus,.cf-field textarea:focus{border-bottom-color:var(--blue);}
.cf-field::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--blue);transition:width .45s var(--ease-out);
  box-shadow:0 0 8px rgba(91,141,255,.5);
}
.cf-field:focus-within::after{width:100%;}

.cf-submit{
  display:inline-flex;align-items:center;gap:12px;justify-self:start;
  font-family:var(--mono);font-size:.8rem;font-weight:700;letter-spacing:.14em;
  padding:14px 24px;background:transparent;color:var(--ink);
  border:1px solid var(--line-strong);cursor:pointer;
  position:relative;overflow:hidden;
  transition:border-color .3s var(--ease),color .3s var(--ease);
}
.cf-submit::before{
  content:"";position:absolute;inset:0;background:var(--blue);
  transform:translateX(-101%);transition:transform .5s var(--ease-out);z-index:-1;
}
.cf-submit:hover{border-color:var(--blue);color:#fff;}
.cf-submit:hover::before{transform:translateX(0);}
.cf-submit .arrow{color:var(--blue);transition:transform .3s var(--ease),color .3s var(--ease);}
.cf-submit:hover .arrow{transform:translateX(4px);color:#fff;}
.cf-submit:disabled{opacity:.55;cursor:progress;}
.cf-submit:disabled:hover{border-color:var(--line-strong);color:var(--ink);}
.cf-submit:disabled:hover::before{transform:translateX(-101%);}

.cf-status{
  min-height:1.2em;font-family:var(--mono);font-size:.78rem;letter-spacing:.06em;
  color:var(--ink-dim);margin-top:4px;
}
.cf-status[data-kind="error"]{color:#ff8484;}

.hp{position:absolute;left:-9999px;opacity:0;pointer-events:none;}

/* ===== Footer ===== */
.foot{
  border-top:1px solid var(--line);
  padding:28px var(--pad-x);
  display:flex;align-items:center;justify-content:center;gap:14px;
  font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.22em;
  color:var(--ink-faint);
}
.foot-mark{
  width:8px;height:8px;background:var(--blue);
  animation:mark-pulse 3.6s ease-in-out infinite;
}

/* ===== Motion ===== */
.load{opacity:0;transform:translateY(14px);}
html.js body.ready .load{
  animation:load .9s var(--ease-out) forwards;
  animation-delay:var(--d,0s);
}
@keyframes load{to{opacity:1;transform:none;}}

html.js .reveal{opacity:0;transform:translateY(24px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);}
html.js .reveal.in{opacity:1;transform:none;}

/* Work list stagger */
html.js .works-list .work.reveal{transition-delay:calc(var(--rev-i,0) * 80ms);}
html.js .record-list .rec.reveal{transition-delay:calc(var(--rev-i,0) * 55ms);}

@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .hero-name .ch{opacity:1;transform:none;}
  .hero-line{width:min(140px,40vw);}
  html.js .reveal{opacity:1;transform:none;}
  html.js .reveal .sec-title-line{width:clamp(40px,10vw,90px);}
}