/* shodai4.com — paper & ink */

:root{
  --paper:#f4f1ea;
  --paper-2:#ece7dd;
  --ink:#16181c;
  --ink-soft:#4a4d54;
  --ink-mute:#7c7f86;
  --line:#d9d2c6;
  --accent:#b8452c;
  --serif:"Hiragino Mincho ProN","Hiragino Mincho Pro","Yu Mincho",YuMincho,"Noto Serif JP","Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",YuGothic,"Noto Sans JP",Meiryo,sans-serif;
  --max:1040px;
}

*{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:
    radial-gradient(1200px 600px at 12% -10%, #fbf8f2 0%, rgba(251,248,242,0) 60%),
    radial-gradient(900px 500px at 100% 0%, #f6efe6 0%, rgba(246,239,230,0) 55%),
    var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;height:auto;display:block}

a{color:inherit}

.skip{
  position:absolute;left:-9999px;top:0;
  background:var(--ink);color:var(--paper);
  padding:.6em 1em;border-radius:0 0 8px 0;z-index:50;
}
.skip:focus{left:0}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* ---------- header ---------- */

.site-header{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.85rem clamp(1.1rem,4vw,2.4rem);
  background:#f4f1ea;
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}

.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none}
.brand-mark{
  display:grid;place-items:center;
  width:30px;height:30px;border-radius:9px;
  background:var(--ink);color:var(--paper);
  font-family:var(--serif);font-size:1.05rem;line-height:1;
  padding-bottom:.12em;
}
.brand-text{font-family:var(--serif);font-size:1rem;letter-spacing:.06em}
.brand-dot{color:var(--ink-mute)}

.site-nav{display:flex;gap:clamp(.75rem,2.4vw,1.7rem);font-size:.8rem;letter-spacing:.06em}
.site-nav a{text-decoration:none;color:var(--ink-soft);padding:.2rem 0;border-bottom:1px solid transparent;transition:color .2s,border-color .2s;white-space:nowrap}
.site-nav a:hover{color:var(--ink);border-bottom-color:var(--ink)}

@media (max-width:600px){
  .site-nav{font-size:.7rem;gap:.7rem;letter-spacing:.01em}
  .brand-text{display:none}
}

@media (max-width:380px){
  .site-nav{font-size:.66rem;gap:.55rem}
}

/* ---------- hero ---------- */

.hero{
  max-width:var(--max);
  margin:0 auto;
  padding:clamp(3rem,8vw,6.2rem) clamp(1.2rem,4vw,2.4rem) clamp(2rem,4vw,3rem);
}

.eyebrow{
  margin:0 0 1.6rem;
  font-size:.72rem;letter-spacing:.26em;text-transform:uppercase;
  color:var(--ink-mute);
}

.hero-title{
  margin:0;
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(2.6rem,9.5vw,5.6rem);
  line-height:1.04;
  letter-spacing:.02em;
}

.hero-tagline{
  margin:1.5rem 0 0;
  font-family:var(--serif);
  font-size:clamp(1.05rem,2.6vw,1.4rem);
  letter-spacing:.16em;
  color:var(--ink);
}

.hero-lead{
  margin:1.5rem 0 0;
  max-width:34em;
  font-size:clamp(.9rem,1.6vw,1rem);
  color:var(--ink-soft);
  line-height:2.15;
}

.cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:2.2rem}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.82em 1.7em;
  border:1px solid var(--ink);
  border-radius:999px;
  font-size:.84rem;letter-spacing:.12em;
  text-decoration:none;
  transition:background .2s,color .2s,transform .2s;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn--primary:hover{background:#000}
.btn:not(.btn--primary):hover{background:#ece7dd}

.hero-note{
  margin:1.1rem 0 0;
  font-size:.72rem;letter-spacing:.08em;color:var(--ink-mute);
}

/* ---------- screenshot ---------- */

.shot{
  max-width:var(--max);
  margin:0 auto;
  padding:0 clamp(1.2rem,4vw,2.4rem);
}

.shot-frame{
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  background:var(--paper-2);
  box-shadow:0 30px 60px -40px rgba(22,24,28,.45);
}
.shot-frame img{width:100%}

.shot figcaption{
  margin:.9rem 0 0;
  font-size:.74rem;letter-spacing:.06em;color:var(--ink-mute);
  text-align:right;
}

/* ---------- sections ---------- */

.section{
  max-width:var(--max);
  margin:0 auto;
  padding:clamp(2.6rem,6vw,4.6rem) clamp(1.2rem,4vw,2.4rem);
  border-top:1px solid var(--line);
  scroll-margin-top:4.5rem;
}

.section-head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:.6rem 2rem;flex-wrap:wrap;
  margin-bottom:clamp(1.6rem,3.6vw,2.6rem);
}

.section-title{
  margin:0;
  font-family:var(--serif);font-weight:600;
  font-size:clamp(1.25rem,3vw,1.65rem);
  letter-spacing:.14em;
}

.section-note{
  margin:0;font-size:.8rem;color:var(--ink-mute);line-height:1.8;
}

/* ---------- features ---------- */

.features{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1.1rem,3vw,2.2rem);
}

.feature{padding-top:1rem;border-top:2px solid var(--ink)}
.feature-num{
  margin:0 0 .7rem;
  font-family:var(--serif);font-size:.72rem;letter-spacing:.18em;color:var(--accent);
}
.feature h3{
  margin:0 0 .6rem;
  font-family:var(--serif);font-weight:600;font-size:1rem;letter-spacing:.06em;
}
.feature p{margin:0;font-size:.85rem;line-height:2;color:var(--ink-soft)}

@media (max-width:760px){
  .features{grid-template-columns:minmax(0,1fr);gap:1.5rem}
}

/* ---------- art ---------- */

.section--art{background:linear-gradient(180deg,rgba(236,231,221,.5),rgba(236,231,221,0))}

.art-list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1rem,2.6vw,1.8rem);
}

.art-item{padding:1.2rem 1.1rem 1.3rem;border-top:1px solid var(--line)}
.art-when{
  margin:0 0 .6rem;
  font-size:.7rem;letter-spacing:.16em;color:var(--accent);
}
.art-title{
  margin:0 0 .55rem;
  font-family:var(--serif);font-weight:600;font-size:1rem;letter-spacing:.05em;
}
.art-title a{text-decoration:none;border-bottom:1px solid var(--line)}
.art-title a:hover{border-bottom-color:var(--accent)}
.art-desc{margin:0;font-size:.83rem;line-height:1.95;color:var(--ink-soft)}

@media (max-width:760px){
  .art-list{grid-template-columns:minmax(0,1fr)}
}

/* ---------- maker ---------- */

.maker{max-width:34em}
.maker p{
  margin:0 0 1.1rem;
  font-size:.88rem;line-height:2.1;color:var(--ink-soft);
}
.maker p:last-child{margin-bottom:0}

/* ---------- contact ---------- */

.contact-list{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.contact-list a{
  display:flex;flex-direction:column;gap:.25rem;
  height:100%;
  padding:1.1rem 1.2rem;background:#fbf9f5;text-decoration:none;
  font-size:.88rem;transition:background .2s;
}
.contact-list a:hover{background:#f3ede2}
.contact-list span{font-size:.66rem;letter-spacing:.18em;color:var(--ink-mute)}

@media (max-width:700px){
  .contact-list{grid-template-columns:minmax(0,1fr)}
}

/* ---------- footer ---------- */

.site-footer{
  max-width:var(--max);
  margin:0 auto;
  padding:2.4rem clamp(1.2rem,4vw,2.4rem) 3.6rem;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;
  align-items:baseline;justify-content:space-between;
  font-size:.74rem;color:var(--ink-mute);
}
.footer-credit{margin:0;letter-spacing:.04em}
.footer-copy{margin:0}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}