/* USUI LAB 実験ノート：画面いっぱいの方眼ノートに、写真や付箋を貼っていく見た目 */
:root{
  --paper:#fbf6ea;--paper-2:#f4ecdb;--card:#fffdf6;--hole:#e3d6bf;
  --grid:rgba(96,130,148,.13);--rule:rgba(84,124,168,.22);--margin:rgba(208,74,47,.4);
  --ink:#2a241e;--ink-2:#51463c;--ink-3:#7d7062;
  --red:#d04a2f;--red-deep:#b23a22;--blue:#2b5d94;--green:#2f7a52;--purple:#7b4f9e;--amber:#b06a12;--teal:#2f6f7c;
  --marker:rgba(255,212,64,.82);
  --tape-y:rgba(238,204,112,.75);--tape-g:rgba(150,196,166,.7);--tape-p:rgba(240,168,160,.66);
  --note-y:#fbe6a0;--note-g:#cfe7cb;--note-p:#f6cfc7;--note-b:#cfe0f2;
  --hand:"Zen Kurenaido","Klee One",cursive;
  --body:"Klee One","Hiragino Mincho ProN",serif;
  --type:"Courier Prime","Courier New",monospace;
  --shadow-photo:0 1px 2px rgba(0,0,0,.08),0 18px 34px -20px rgba(70,48,24,.62);
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html,body{overflow-x:clip}
body{margin:0;color:var(--ink);font-family:var(--body);font-size:19px;line-height:1.9;letter-spacing:.02em;background:var(--paper)}
img{max-width:100%;height:auto}
a{color:inherit}
:focus-visible{outline:3px dashed var(--red);outline-offset:4px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;z-index:30;padding:6px 12px;background:var(--ink);color:#fff}
.skip:focus{left:12px}

/* ---------- 紙（画面いっぱい） ---------- */
.sheet{position:relative;min-height:100vh;padding:34px clamp(28px,4vw,76px) 80px clamp(118px,8.5vw,156px);
  background:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .32  0 0 0 0 .24  0 0 0 0 .16  0 0 0 .08 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>"),
    linear-gradient(90deg,transparent 94px,var(--margin) 94px,var(--margin) 96px,transparent 96px),
    linear-gradient(var(--grid) 1px,transparent 1px) 0 0/24px 24px,
    linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/24px 24px,
    linear-gradient(180deg,var(--paper),var(--paper-2))}
.sheet::before{content:"";position:absolute;left:26px;top:20px;bottom:20px;width:38px;
  background:radial-gradient(circle at 50% 34px,var(--hole) 0 10px,rgba(70,48,24,.24) 10.5px,rgba(70,48,24,.06) 12px,transparent 13px) 0 0/100% 68px}
.page{max-width:1440px;margin:0 auto}

/* ---------- インデックス付箋（画面右端に固定） ---------- */
.tabs{position:fixed;right:0;top:132px;z-index:20;display:grid;gap:10px;margin:0;padding:0;list-style:none}
.tabs a{display:block;width:54px;padding:20px 0 20px 12px;border-radius:10px 0 0 10px;font-weight:600;font-size:18px;letter-spacing:.2em;text-decoration:none;writing-mode:vertical-rl;color:var(--ink);background:var(--c);box-shadow:-3px 4px 12px -6px rgba(70,48,24,.6);transform:translateX(8px);transition:transform .25s var(--ease)}
.tabs a:hover,.tabs a:focus-visible{transform:translateX(0)}
.tabs li:nth-child(1) a{--c:var(--note-y)}.tabs li:nth-child(2) a{--c:var(--note-g)}.tabs li:nth-child(3) a{--c:var(--note-b)}.tabs li:nth-child(4) a{--c:var(--note-p)}

/* ---------- 見出し帯 ---------- */
.masthead{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 28px;padding-bottom:20px;margin-bottom:40px;border-bottom:3px solid var(--ink)}
.logo{display:flex;align-items:baseline;gap:14px;text-decoration:none}
.logo b{font-family:var(--type);font-size:32px;font-weight:700;letter-spacing:.06em}
.logo span{font-family:var(--hand);font-size:21px;color:var(--ink-2)}
.masthead-meta{display:flex;align-items:center;gap:18px;font-family:var(--type);font-size:15px;color:var(--ink-3)}

/* ---------- 共通の部品 ---------- */
.label{display:inline-block;padding:3px 12px;font-family:var(--type);font-size:15px;font-weight:700;letter-spacing:.14em;color:var(--ink-2);background:rgba(255,255,255,.75);border:1.5px solid rgba(81,70,60,.45);border-radius:3px;transform:rotate(-1deg)}
.marker{padding:0 .08em;background:linear-gradient(transparent 55%,var(--marker) 55%,var(--marker) 93%,transparent 93%)}
.redpen{font-family:var(--hand);color:var(--red);font-size:22px;line-height:1.5}
.doodle{display:block;overflow:visible;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round}
.draw path{stroke-dasharray:1;stroke-dashoffset:1}
.in.draw path,.in .draw path{animation:draw 1.1s var(--ease) forwards;animation-delay:var(--dd,.25s)}
@keyframes draw{to{stroke-dashoffset:0}}

/* ゴム印のボタン：.fill は朱の塗り（いちばん押してほしいもの）、.ink は墨の塗り */
.stamp-btn{position:relative;display:inline-flex;align-items:center;gap:.55em;padding:.72em 1.5em;border:3px solid currentColor;border-radius:8px;color:var(--red);font-family:var(--body);font-weight:600;font-size:19px;line-height:1.4;text-decoration:none;background:rgba(208,74,47,.06);transform:rotate(-1.5deg);transition:transform .2s var(--ease),background .2s,box-shadow .2s}
.stamp-btn:hover{transform:rotate(0) translateY(-2px);background:rgba(208,74,47,.12)}
.stamp-btn:active{transform:rotate(0) scale(.96)}
.stamp-btn.fill{color:#fffaf0;background:var(--red);border-color:var(--red);box-shadow:4px 5px 0 rgba(178,58,34,.28);transform:rotate(-1deg)}
.stamp-btn.fill:hover{background:var(--red-deep);border-color:var(--red-deep)}
.stamp-btn.ink{color:#fffaf0;background:var(--ink);border-color:var(--ink);box-shadow:4px 5px 0 rgba(70,48,24,.25);transform:rotate(1deg)}
.stamp-btn.ink:hover{background:#433a31;border-color:#433a31}
.stamp-btn.small{padding:.45em 1.1em;font-size:17px;border-width:2.5px}

.section{position:relative;margin-top:120px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:8px 28px;margin-bottom:44px}
.section-head .num{display:block;font-family:var(--type);font-size:16px;font-weight:700;letter-spacing:.2em;color:var(--red)}
.section-head h2{position:relative;margin:4px 0 0;font-size:clamp(36px,4.2vw,58px);font-weight:600;line-height:1.3;letter-spacing:.04em}
.section-head h2 .underline{position:absolute;left:-4px;right:-12px;bottom:-14px;height:16px;color:var(--red)}
.section-head .aside{margin:0 0 6px;font-family:var(--hand);font-size:23px;color:var(--ink-2)}
.divider{display:block;width:100%;height:20px;margin-top:100px;color:rgba(81,70,60,.5)}

/* ---------- 表紙 ---------- */
.cover{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(28px,5vw,80px);align-items:start}
.cover h1{margin:20px 0 10px;font-size:clamp(50px,6.4vw,100px);font-weight:600;line-height:1.18;letter-spacing:.03em}
.cover .sub{margin:0 0 26px;font-family:var(--hand);font-size:clamp(24px,2.5vw,32px);line-height:1.6;color:var(--ink)}
.cover .lead{max-width:32em;margin:0 0 34px;font-size:20px;line-height:2;color:var(--ink-2)}
.cover .actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px 24px}
.cover .pointer{display:flex;align-items:flex-start;gap:8px;margin-top:30px}
.cover .pointer svg{width:72px;height:52px;flex:none;color:var(--red);transform:rotate(8deg)}
.collage{position:relative;min-height:660px}
.collage .polaroid:nth-child(1){position:absolute;right:2%;top:0;width:min(430px,78%);--r:3deg}
.collage .polaroid:nth-child(2){position:absolute;left:0;top:47%;width:min(380px,70%);--r:-4.5deg;--tape:var(--tape-g)}
.collage .sticky-mini{position:absolute;right:0;bottom:2%;z-index:2;width:min(230px,46%);padding:16px 18px;font-family:var(--hand);font-size:20px;line-height:1.55;background:var(--note-y);box-shadow:var(--shadow-photo);transform:rotate(4deg)}

/* ---------- ポラロイド ---------- */
.polaroid{position:relative;margin:0;padding:14px 14px 18px;background:#fff;box-shadow:var(--shadow-photo);transform:rotate(var(--r,-2deg));transition:transform .35s var(--ease)}
.polaroid:hover{transform:rotate(0) translateY(-4px)}
.polaroid img,.polaroid svg.photo{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#2b2621}
.polaroid.square img{aspect-ratio:1}
.polaroid figcaption{margin:12px 4px 0;font-family:var(--hand);font-size:22px;line-height:1.45;color:var(--ink)}
.tape::before{content:"";position:absolute;top:-14px;left:50%;width:112px;height:30px;margin-left:-56px;background:var(--tape,var(--tape-y));transform:rotate(-3deg);box-shadow:0 1px 2px rgba(0,0,0,.06);clip-path:polygon(2% 0,98% 6%,100% 94%,4% 100%,0 50%)}

/* ---------- 分類のハンコ・日付 ---------- */
.date{font-family:var(--type);font-size:16px;font-weight:700;letter-spacing:.05em;color:var(--ink-2)}
.cat{display:inline-block;padding:3px 14px;border-radius:6px;color:#fffaf0;background:var(--cc,var(--blue));font-size:16px;font-weight:600;line-height:1.5;letter-spacing:.08em;box-shadow:inset 0 0 0 2px rgba(255,255,255,.22);transform:rotate(-2deg);white-space:nowrap}
.cat.compare{--cc:var(--red)}.cat.howto{--cc:var(--green)}.cat.basics{--cc:var(--blue)}.cat.question{--cc:var(--purple)}.cat.news{--cc:var(--amber)}.cat.work{--cc:var(--teal)}

/* ---------- 最近のノート ---------- */
.notes{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:clamp(30px,4.5vw,72px);align-items:start}
/* 注目記事は罫線ノート：文字の行を罫線（42px 間隔）にそろえる */
.featured{position:relative;padding:42px 36px 42px;background:var(--card);border-radius:3px;box-shadow:var(--shadow-photo);transform:rotate(-1.2deg);line-height:42px;
  background-image:repeating-linear-gradient(transparent 0 41px,var(--rule) 41px 42px);background-position:0 42px}
/* 右の一覧を読んでいる間、注目記事はその場に留まる */
@media (min-width:901px){.notes .featured{position:sticky;top:110px}}
.featured .clip{position:absolute;top:-26px;left:34px;width:34px;height:80px;color:#8f8a84}
.featured .meta{display:flex;flex-wrap:wrap;gap:0 12px;align-items:center;min-height:42px;margin:0}
.featured h3{margin:0;font-size:30px;font-weight:600;line-height:42px}
.featured h3 a{text-decoration:none;background:linear-gradient(transparent 60%,var(--marker) 60%) no-repeat 0 0/0 100%;transition:background-size .5s var(--ease)}
.featured h3 a:hover{background-size:100% 100%}
.featured p{margin:0 0 42px;font-size:19px;color:var(--ink-2)}
.featured .more{margin:0;line-height:42px}
.featured .circle-note{position:absolute;right:-20px;top:-38px;width:176px;color:var(--red);text-align:center;transform:rotate(6deg)}
.featured .circle-note svg{position:absolute;inset:-16px -12px;width:calc(100% + 24px);height:calc(100% + 32px)}
.featured .circle-note span{position:relative;font-family:var(--hand);font-size:20px;line-height:1.35}
.note-list{margin:0;padding:0;list-style:none;border-top:2px solid rgba(81,70,60,.35)}
.note-list li{display:grid;grid-template-columns:9.5em minmax(0,1fr);gap:6px 24px;padding:20px 0;border-bottom:1.5px dashed rgba(81,70,60,.3)}
.note-list .when{display:grid;align-content:start;justify-items:start;gap:8px;padding-top:4px}
.note-list h3{margin:0;font-size:22px;font-weight:600;line-height:1.6}
.note-list .new{font-family:var(--hand);font-size:21px;line-height:1;color:var(--red);transform:rotate(-8deg)}
.note-list .is-new{background:linear-gradient(90deg,rgba(255,212,64,.16),transparent 70%)}
.note-list h3 a{text-decoration:none}
.note-list h3 a:hover{text-decoration:underline;text-decoration-color:var(--red);text-decoration-thickness:3px;text-underline-offset:5px}
.note-list p{margin:6px 0 0;font-size:17px;line-height:1.8;color:var(--ink-2)}
.more{display:inline-flex;align-items:center;gap:10px;margin-top:26px;font-size:19px;font-weight:600;text-decoration:none;color:var(--red)}
.more svg{width:48px;height:18px;transition:transform .25s var(--ease)}
.more:hover svg{transform:translateX(6px)}

/* ---------- テーマ別に読む（情報カード） ---------- */
.themes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px 32px;align-items:start}
.index-card{position:relative;padding:30px 28px 26px;background:var(--card);border-top:5px solid var(--red);box-shadow:var(--shadow-photo);transform:rotate(var(--r,0deg))}
.index-card:nth-child(1){--r:-1.4deg}.index-card:nth-child(2){--r:1deg;margin-top:24px}.index-card:nth-child(3){--r:-.6deg}
.index-card h3{margin:0 0 6px;font-size:27px;font-weight:600}
.index-card .count{display:inline-block;padding:1px 10px;font-family:var(--type);font-size:15px;font-weight:700;color:var(--red);border:1.5px solid currentColor;border-radius:4px}
/* 目次は罫線（42px 間隔）の上に1行ずつ書く */
.index-card ol{margin:16px 0 0;padding:0;list-style:none;border-top:1px solid var(--rule);background-image:repeating-linear-gradient(transparent 0 41px,var(--rule) 41px 42px)}
.index-card li{display:grid;grid-template-columns:26px 1fr;gap:8px;align-items:start;line-height:42px}
.index-card li svg{width:21px;height:21px;margin-top:10px;color:var(--green)}
.index-card li a{text-decoration:none;font-size:19px}
.index-card li a:hover{color:var(--red);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:5px}
.next-up{position:relative;margin:40px 0 0 auto;max-width:500px;padding:24px 26px 26px;background:var(--note-y);box-shadow:var(--shadow-photo);transform:rotate(2deg)}
.next-up p{margin:0;font-size:18px}
.next-up b{display:block;margin-bottom:4px;font-family:var(--hand);font-size:25px;font-weight:400;color:var(--red-deep)}

/* ---------- つくったもの ---------- */
.works{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:64px clamp(30px,3vw,48px);align-items:start}
.work .polaroid{--r:var(--wr,-2deg)}
.work:nth-child(2){--wr:2.4deg;margin-top:40px}.work:nth-child(3){--wr:-1deg}
.work .file{display:block;margin:24px 2px 6px;font-family:var(--type);font-size:15px;font-weight:700;letter-spacing:.12em;color:var(--red)}
.work h3{margin:0 2px 8px;font-size:28px;font-weight:600;line-height:1.4}
.work p{margin:0 2px 14px;font-size:18px;line-height:1.85;color:var(--ink-2)}
.links{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0 2px;padding:0;list-style:none;font-size:18px;font-weight:600}
.links a{text-decoration:underline;text-decoration-color:var(--tape-y);text-decoration-thickness:8px;text-underline-offset:-3px}
.links a:hover{text-decoration-color:var(--tape-p)}
.links .ext::after{content:" ↗";font-family:var(--type);font-weight:400}
.side-works{display:flex;flex-wrap:wrap;gap:14px 40px;margin:56px 0 0;padding:20px 26px;border:2px dashed rgba(81,70,60,.42);border-radius:8px;list-style:none}
.side-works a{font-size:20px;font-weight:600;text-decoration:none}
.side-works a:hover{color:var(--red)}
.side-works small{display:block;font-size:16px;font-weight:400;color:var(--ink-3)}

/* ---------- 仕事の相談（付箋） ---------- */
.board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px}
.sticky{position:relative;display:flex;flex-direction:column;padding:30px 28px 28px;background:var(--c);text-decoration:none;box-shadow:0 1px 1px rgba(0,0,0,.05),0 18px 26px -18px rgba(70,48,24,.68);transform:rotate(var(--r));transition:transform .3s var(--ease)}
.sticky::after{content:"";position:absolute;right:0;bottom:0;width:30px;height:30px;background:linear-gradient(135deg,rgba(0,0,0,.08),rgba(255,255,255,.4) 50%,var(--paper) 51%)}
.sticky:hover{transform:rotate(0) translateY(-4px)}
.sticky:nth-child(1){--c:var(--note-y);--r:-2deg}.sticky:nth-child(2){--c:var(--note-g);--r:1.5deg}.sticky:nth-child(3){--c:var(--note-p);--r:-.8deg}
.sticky .kind{display:inline-block;align-self:flex-start;padding:1px 10px;font-size:16px;font-weight:600;letter-spacing:.1em;color:#fffaf0;background:var(--ink-2);border-radius:4px}
.sticky h3{margin:10px 0 12px;font-family:var(--hand);font-size:30px;font-weight:400;line-height:1.4}
.sticky p{flex:1;margin:0 0 18px;font-size:18px;line-height:1.85;color:var(--ink-2)}
.sticky .go{font-weight:600;font-size:19px;color:var(--red-deep)}
.sticky .go::after{content:" →"}
.contact-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px 32px;margin-top:48px}
.contact-cta p{margin:0;max-width:30em;font-size:18px;color:var(--ink-2)}

/* ---------- この部屋の人 ---------- */
.about{display:grid;grid-template-columns:240px minmax(0,1fr);gap:44px;align-items:start}
.about .polaroid{--r:-3deg;--tape:var(--tape-g)}
.about .polaroid img{aspect-ratio:1}
.about p{max-width:36em;margin:0 0 18px;font-size:19px;color:var(--ink-2)}

/* ---------- 奥付 ---------- */
.colophon{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px 34px;margin-top:120px;padding-top:26px;border-top:3px solid var(--ink);font-size:17px}
.colophon ul{display:flex;flex-wrap:wrap;gap:8px 26px;margin:0;padding:0;list-style:none}
.colophon a{text-decoration:none;font-weight:600}
.colophon a:hover{color:var(--red)}
.colophon small{font-family:var(--type);font-size:15px;color:var(--ink-3)}

/* ---------- 表示時の演出 ----------
   中身は最初から見える状態が基本。読み込み時に画面の外にある要素だけ、JS が .pending を付けて待たせる
   （縦長の画面で読む検索ロボットには、すべて見えた状態で渡る） */
[data-reveal]{transition:opacity .7s var(--ease),transform .7s var(--ease);transition-delay:var(--d,0s)}
[data-reveal].pending{opacity:0;transform:translateY(16px)}

/* ---------- 画面幅ごとの調整 ---------- */
@media (max-width:1100px){
  .tabs{position:static;display:flex;flex-wrap:wrap;gap:10px;margin:0 0 30px}
  .tabs a{width:auto;padding:6px 18px;border-radius:8px;writing-mode:horizontal-tb;letter-spacing:.08em;transform:none;font-size:17px;box-shadow:2px 3px 8px -5px rgba(70,48,24,.6)}
  .tabs a:hover{transform:translateY(-2px)}
}
@media (max-width:900px){
  .cover,.notes{grid-template-columns:1fr}
  .collage{min-height:620px;margin-top:14px}
  .themes,.works,.board{grid-template-columns:1fr 1fr}
  .index-card:nth-child(2),.work:nth-child(2){margin-top:0}
}
@media (max-width:640px){
  body{font-size:17px}
  .sheet{padding:22px 18px 64px 44px;
    background:
      linear-gradient(90deg,transparent 30px,var(--margin) 30px,var(--margin) 32px,transparent 32px),
      linear-gradient(var(--grid) 1px,transparent 1px) 0 0/20px 20px,
      linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/20px 20px,
      linear-gradient(180deg,var(--paper),var(--paper-2))}
  .sheet::before{display:none}
  .logo b{font-size:25px}.logo span{font-size:17px}
  .masthead{margin-bottom:24px}
  .masthead-meta .date{display:none}
  .tabs a{padding:5px 14px;font-size:16px}
  .cover .lead{font-size:18px}
  .stamp-btn{font-size:18px}
  .collage{min-height:560px}
  .collage .polaroid:nth-child(1){width:80%}
  .collage .polaroid:nth-child(2){width:72%;top:50%}
  .collage .sticky-mini{width:52%;font-size:17px;bottom:-2%}
  .themes,.works,.board,.about{grid-template-columns:1fr}
  .featured{padding:42px 22px 30px}
  .featured h3{font-size:24px}
  .featured .circle-note{right:-8px;top:-42px;width:150px}
  .note-list li{grid-template-columns:1fr}
  .note-list .when{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
  .note-list h3{font-size:20px}
  .work h3{font-size:25px}
  .sticky h3{font-size:26px}
  .about .polaroid{max-width:220px}
  .section{margin-top:84px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  [data-reveal].pending{opacity:1;transform:none}
  .draw path{stroke-dashoffset:0}
}