/* ============================================================
   Koshin Studio
   藍の闇に、和紙の白。動きは静かに、粒は米のように。
   書体は漢字を持つものまで並べる（端末に無いだけで字が出ない事故を防ぐ）
   ============================================================ */
:root{
  --ink0:#080d16; --ink1:#0f1725; --ink2:#16202f;
  --line:rgba(232,222,200,.13);
  --text:#ece6d8; --muted:#9d9483; --dim:#6f6a60;
  --shu:#d8543f; --gold:#e8b62c; --ai:#7fa8d8;
  --mincho:"Hiragino Mincho ProN","Hiragino Mincho Pro","Yu Mincho","YuMincho",
    "Noto Serif JP","Noto Serif CJK JP","Source Han Serif JP","MS PMincho",
    "Songti SC","SimSun",serif,"Hiragino Sans","Yu Gothic","Noto Sans JP","Meiryo",sans-serif;
  --gothic:"Helvetica Neue",Helvetica,Arial,"Hiragino Sans","Hiragino Kaku Gothic ProN",
    "Yu Gothic","Noto Sans JP","Noto Sans CJK JP","Meiryo",sans-serif;
  --ease:cubic-bezier(.16,.84,.34,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--ink0);color:var(--text);
  font-family:var(--gothic);font-size:16px;line-height:1.95;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
/* 奥行き：ゆっくり回る光の帯 */
body::before{
  content:"";position:fixed;inset:-20%;z-index:-3;pointer-events:none;
  background:
    radial-gradient(58% 42% at 22% 8%, rgba(58,96,158,.30), transparent 62%),
    radial-gradient(48% 40% at 84% 22%, rgba(160,60,44,.16), transparent 66%),
    radial-gradient(70% 60% at 50% 108%, rgba(232,182,44,.09), transparent 64%),
    linear-gradient(180deg,#0a111d 0%,#080d16 55%,#070b12 100%);
  animation:drift 46s ease-in-out infinite alternate;
}
@keyframes drift{from{transform:translate3d(-1.6%,-1%,0) scale(1.03)}
                 to{transform:translate3d(1.8%,1.4%,0) scale(1.09)}}
/* 紙の粒子 */
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}
#motes{position:fixed;inset:0;z-index:-2;pointer-events:none}

a{color:var(--ai);text-underline-offset:3px;text-decoration-thickness:1px;
  transition:color .3s var(--ease)}
a:hover{color:var(--gold)}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:760px;margin:0 auto;padding:0 24px}

/* ---- 帯 ---- */
header.site{position:sticky;top:0;z-index:20;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(8,13,22,.62);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;gap:20px;height:60px}
header.site .logo{font-family:var(--mincho);font-size:16px;letter-spacing:.2em;
  text-decoration:none;color:var(--text);white-space:nowrap;position:relative}
header.site .logo::after{content:"";position:absolute;left:0;right:100%;bottom:-5px;
  height:1px;background:var(--shu);transition:right .45s var(--ease)}
header.site .logo:hover::after{right:0}
header.site nav{margin-left:auto;display:flex;gap:22px;font-size:13px;letter-spacing:.06em}
header.site nav a{text-decoration:none;color:var(--muted)}
header.site nav a:hover{color:var(--gold)}

/* ---- 表 ---- */
.hero{min-height:82vh;display:flex;flex-direction:column;justify-content:center;
  padding:70px 0 40px;position:relative}
.hero .mark{font-family:var(--mincho);font-weight:600;line-height:1.12;margin:0;
  font-size:clamp(40px,10.5vw,88px);letter-spacing:.04em}
.hero .mark span{display:inline-block;opacity:0;transform:translateY(.5em) rotate(2deg);
  animation:rise 1.05s var(--ease) forwards}
@keyframes rise{to{opacity:1;transform:none}}
.hero .kicker{font-family:var(--mincho);font-size:13px;letter-spacing:.5em;
  color:var(--gold);margin:0 0 20px;opacity:0;animation:rise .9s var(--ease) .1s forwards}
.hero .say{color:var(--muted);font-size:15.5px;letter-spacing:.09em;max-width:34em;
  margin:26px 0 0;opacity:0;animation:rise 1s var(--ease) .75s forwards}
.hero .scrollcue{margin-top:52px;font-size:11px;letter-spacing:.3em;color:var(--dim);
  opacity:0;animation:rise 1s var(--ease) 1.05s forwards}
.hero .scrollcue i{display:inline-block;width:1px;height:26px;background:var(--dim);
  vertical-align:-9px;margin-right:12px;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scaleY(.35);opacity:.35;transform-origin:top}
                 50%{transform:scaleY(1);opacity:1;transform-origin:top}}

/* ---- 見出し ---- */
main{padding-bottom:90px}
h1{font-family:var(--mincho);font-weight:600;font-size:clamp(27px,5.6vw,38px);
  letter-spacing:.1em;line-height:1.55;margin:0 0 8px}
h2{font-family:var(--mincho);font-weight:600;font-size:20px;letter-spacing:.16em;
  margin:66px 0 20px;color:var(--text);display:flex;align-items:center;gap:16px}
h2::after{content:"";flex:1;height:1px;background:var(--line)}
h3{font-size:15.5px;letter-spacing:.06em;margin:34px 0 8px;color:var(--text)}
p{margin:0 0 19px}
.lead{color:var(--muted);font-size:15px;letter-spacing:.07em;margin-bottom:36px}
.rule{width:44px;height:2px;background:var(--shu);margin:22px 0 26px}
strong{color:#fff;font-weight:600}

/* ---- 押しどころ ---- */
.btn{display:inline-block;position:relative;overflow:hidden;
  background:var(--shu);color:#fff;text-decoration:none;
  font-family:var(--mincho);font-size:17px;letter-spacing:.24em;text-indent:.24em;
  padding:16px 46px;border-radius:2px;
  box-shadow:0 10px 30px -12px rgba(216,84,63,.9);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.btn::after{content:"";position:absolute;inset:0;background:
  linear-gradient(105deg,transparent 38%,rgba(255,255,255,.35) 50%,transparent 62%);
  transform:translateX(-120%);transition:transform .75s var(--ease)}
.btn:hover{color:#fff;transform:translateY(-2px);
  box-shadow:0 16px 38px -12px rgba(216,84,63,1)}
.btn:hover::after{transform:translateX(120%)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line);
  box-shadow:none}
.btn.ghost:hover{border-color:var(--gold);color:var(--gold)}

/* ---- 作品 ---- */
.works{list-style:none;padding:0;margin:0;display:grid;gap:20px}
.work{display:grid;grid-template-columns:132px 1fr;gap:24px;align-items:center;
  padding:22px;border:1px solid var(--line);border-radius:6px;
  background:linear-gradient(150deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  text-decoration:none;color:inherit;position:relative;overflow:hidden;
  transition:transform .5s var(--ease),border-color .5s var(--ease)}
.work::before{content:"";position:absolute;inset:0;opacity:0;
  background:radial-gradient(400px circle at var(--mx,50%) var(--my,50%),
    rgba(232,182,44,.13),transparent 62%);
  transition:opacity .5s var(--ease);pointer-events:none}
.work:hover{transform:translateY(-4px);border-color:rgba(232,182,44,.42)}
.work:hover::before{opacity:1}
.work img{border-radius:4px;transition:transform .7s var(--ease);
  box-shadow:0 14px 30px -14px #000}
.work:hover img{transform:scale(1.05)}
.work h3{font-family:var(--mincho);font-size:20px;letter-spacing:.13em;margin:0 0 6px}
.work p{font-size:13.5px;color:var(--muted);margin:0 0 12px;line-height:1.85}
.tags{display:flex;flex-wrap:wrap;gap:7px}
.tag{font-size:10.5px;letter-spacing:.1em;color:var(--dim);
  border:1px solid var(--line);border-radius:99px;padding:3px 11px}
@media(max-width:540px){.work{grid-template-columns:88px 1fr;gap:16px;padding:16px}}
.soon{border:1px dashed var(--line);border-radius:6px;padding:30px 20px;
  text-align:center;color:var(--dim);font-size:13px;letter-spacing:.24em}

/* ---- 文書 ---- */
.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 22px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left}
th{color:var(--dim);font-size:12px;letter-spacing:.1em;font-weight:600}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}
tbody tr:hover td{background:rgba(255,255,255,.028)}
pre{background:rgba(255,255,255,.035);border:1px solid var(--line);border-radius:5px;
  padding:18px 20px;overflow-x:auto;font-size:13px;line-height:1.75;margin:0 0 22px;
  color:#d6cfc0}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
blockquote{margin:26px 0;padding:4px 0 4px 22px;border-left:2px solid var(--shu);
  color:var(--text);font-family:var(--mincho);font-size:17px;letter-spacing:.06em}
.note{font-size:13px;color:var(--dim);letter-spacing:.03em}
ul{padding-left:1.3em}li{margin-bottom:6px}

/* ---- 現れ方 ---- */
.rv{opacity:0;transform:translateY(22px);
  transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv.on{opacity:1;transform:none}

footer.site{border-top:1px solid var(--line);padding:34px 0 60px;
  font-size:12.5px;color:var(--dim);letter-spacing:.05em}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:18px;align-items:baseline}
footer.site nav{margin-left:auto;display:flex;gap:20px}
footer.site a{color:var(--dim);text-decoration:none}
footer.site a:hover{color:var(--gold)}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
  .hero .mark span,.hero .kicker,.hero .say,.hero .scrollcue{opacity:1;transform:none}
}

/* ---- 種類で絞る ---- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 30px}
.chip{appearance:none;background:transparent;border:1px solid var(--line);
  border-radius:99px;color:var(--muted);cursor:pointer;font:inherit;
  font-size:13px;letter-spacing:.12em;padding:9px 20px;
  display:inline-flex;align-items:baseline;gap:9px;
  transition:color .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease)}
.chip i{font-style:normal;font-size:11px;letter-spacing:.06em;color:var(--dim)}
.chip:hover{color:var(--text);border-color:rgba(232,182,44,.5)}
.chip.on{color:#0b1018;background:var(--gold);border-color:var(--gold);font-weight:600}
.chip.on i{color:rgba(11,16,24,.62)}
.tag.kind{color:var(--gold);border-color:rgba(232,182,44,.34)}
.works li[hidden]{display:none}

/* ---- 記録の一覧 ---- */
.notes{list-style:none;padding:0;margin:0;display:grid;gap:2px}
.note-row{display:grid;grid-template-columns:104px 1fr;gap:22px;align-items:baseline;
  padding:24px 18px;border-radius:6px;text-decoration:none;color:inherit;
  border:1px solid transparent;
  transition:background .45s var(--ease),border-color .45s var(--ease),transform .45s var(--ease)}
.note-row:hover{background:rgba(255,255,255,.04);border-color:var(--line);transform:translateX(4px)}
.note-row time{font-size:12.5px;letter-spacing:.1em;color:var(--dim);
  font-variant-numeric:tabular-nums}
.note-row h3{font-family:var(--mincho);font-size:19px;letter-spacing:.1em;margin:0 0 7px}
.note-row p{font-size:13.5px;color:var(--muted);margin:0 0 11px;line-height:1.85}
@media(max-width:540px){.note-row{grid-template-columns:1fr;gap:8px;padding:20px 14px}}

/* ---- 作っているものの三区分 ---- */
.kinds{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:0 0 10px}
.kind{border:1px solid var(--line);border-radius:6px;padding:22px 20px;
  background:linear-gradient(150deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  transition:border-color .5s var(--ease),transform .5s var(--ease)}
.kind:hover{border-color:rgba(232,182,44,.4);transform:translateY(-3px)}
.kind h3{font-family:var(--mincho);font-size:19px;letter-spacing:.14em;margin:0 0 10px;
  display:flex;align-items:baseline;gap:10px}
.kind h3 i{font-style:normal;font-size:11.5px;letter-spacing:.14em;color:var(--gold)}
.kind p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.9}
@media(max-width:660px){.kinds{grid-template-columns:1fr}}