:root{
  --ink:#243b53; --accent:#0e7490; --accent2:#f59e0b;
  --bg:#f6f8fa; --card:#ffffff; --line:#d9e2ec; --warn:#b3261e;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:"Hiragino Sans","Noto Sans JP",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7;display:flex;flex-direction:column}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
.site-header{background:var(--ink);color:#fff;padding:9px 0 8px;flex:none}
.site-header h1{margin:0 0 1px;font-size:1.2rem}
.tagline{margin:0 0 6px;opacity:.9;font-size:.85rem}
.main-nav{display:flex;flex-wrap:wrap;gap:8px}
.main-nav a{color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.5);border-radius:999px;padding:4px 14px;font-size:.9rem}
.main-nav a:hover{background:rgba(255,255,255,.15)}
main{padding:12px 0 8px;flex:1;min-height:0;display:flex;flex-direction:column;width:100%;overflow:auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:0 0 20px}
.card h2{margin:0 0 6px;color:var(--accent);font-size:1.15rem}
.card h3{margin:22px 0 6px;font-size:1.05rem}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:720px){.grid2{grid-template-columns:1fr}}
label{display:block;margin:8px 0}
input[type=text],input[type=number],select{padding:6px 8px;border:1px solid var(--line);border-radius:6px;font-size:1rem;max-width:100%}
input[type=range]{vertical-align:middle;width:45%}
.sliders label{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.sliders select{flex:1 1 180px;min-width:0}
.sliders input[type=number]{width:76px}
.swatch{height:72px;border-radius:8px;border:1px solid var(--line);margin-top:12px}
.result-line{font-size:1.02rem}
.warn{color:var(--warn);font-weight:600}
.note{font-size:.85rem;color:#627d98}
/* 広告枠（アフィリエイト用）: 高さを先に予約してレイアウトのずれを防ぐ */
.ad-slot{position:relative;border:2px dashed var(--line);border-radius:12px;color:#9fb3c8;text-align:center;padding:22px 12px 12px;margin:0 0 20px;background:#fff;font-size:.9rem;display:flex;align-items:center;justify-content:center;overflow:hidden}
.ad-affiliate{min-height:110px}
.ad-label{position:absolute;top:4px;left:10px;font-size:.68rem;color:#9fb3c8;letter-spacing:.08em}
.footer-links a{color:var(--accent)}
/* 下部バナー広告（固定表示）。本文が隠れないよう body に余白を確保 */
.ad-bottom{flex:none;height:64px;background:#fff;border-top:1px solid var(--line);color:#9fb3c8;display:flex;align-items:center;justify-content:center;font-size:.9rem;z-index:900;box-shadow:0 -2px 8px rgba(36,59,83,.08)}
.ad-bottom .ad-label{top:2px}
/* ヘッダー内のボタン（入稿用メニュー／ヘルプ） */
.nav-btn{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5);border-radius:999px;padding:4px 14px;font-size:.9rem;cursor:pointer}
.nav-btn:hover{background:rgba(255,255,255,.15)}
.nav-btn.active{background:var(--accent2);border-color:var(--accent2)}
.pro-menu-intro{border-left:4px solid var(--accent2);background:#fffaf0;padding:10px 14px;border-radius:6px;margin:0 0 16px;font-size:.95rem}
/* モーダル（ヘルプ／全画面広告） */
[hidden]{display:none !important}
.modal{position:fixed;inset:0;z-index:1000}
.modal-backdrop{position:absolute;inset:0;background:rgba(20,32,46,.55)}
.modal-box{position:relative;background:#fff;max-width:760px;margin:4vh auto;max-height:92vh;overflow:auto;border-radius:12px;padding:24px;width:calc(100% - 24px)}
.modal-box h2{margin-top:0;color:var(--accent)}
.modal-close{position:absolute;top:10px;right:10px;background:#e6eef5;color:var(--ink);border-radius:50%;width:36px;height:36px;font-size:1.1rem;line-height:1}
.ad-full-box{text-align:center}
.ad-full-space{min-height:52vh;border:2px dashed var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#9fb3c8;margin:10px 0;background:#fbfcfe}
.file-drop{display:block;border:2px dashed var(--accent);border-radius:10px;padding:10px;text-align:center;cursor:pointer;background:#f0f9ff}
.file-drop input{display:none}
canvas{max-width:100%;height:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
#previewCanvas{max-height:100%}
button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:8px 16px;font-size:.95rem;cursor:pointer}
button:disabled{opacity:.45;cursor:default}
button.mode-btn{background:#e6eef5;color:var(--ink)}
button.mode-btn.active{background:var(--accent2);color:#fff}
.preview-btns{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.checkline{display:flex;align-items:center;gap:8px}
.checklist{list-style:none;padding:0}
.checklist li{border-bottom:1px solid var(--line);padding:6px 0}
.checklist label{display:flex;gap:8px;align-items:flex-start;margin:0;cursor:pointer}
.spec-table{border-collapse:collapse;width:100%;margin:8px 0}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:6px 10px;text-align:left}
.spec-table th{background:#f0f4f8}
.glossary dt{font-weight:700;margin-top:10px}
.glossary dd{margin:0 0 4px}
.site-footer{padding:6px 0 8px;color:#627d98;font-size:.82rem;text-align:center;flex:none}
.site-footer p{margin:2px 0}
.gamut-warn{border:2px solid var(--warn);background:#fdf0ef;border-radius:10px;padding:12px 16px;margin-top:12px}
.gamut-mild{border:1px solid var(--accent2);background:#fffaf0;border-radius:10px;padding:12px 16px;margin-top:12px}
.gamut-ok{border:1px solid #2e7d32;background:#f0f7f0;border-radius:10px;padding:12px 16px;margin-top:12px}
.gamut-title{color:var(--warn);font-weight:700;margin:4px 0}
.gamut-list{list-style:none;padding:0;margin:8px 0}
.gamut-list li{margin:4px 0}
.chip{display:inline-block;width:18px;height:18px;border-radius:4px;border:1px solid rgba(0,0,0,.25);vertical-align:-3px;margin-right:8px}
.limit-box{border:2px solid var(--accent2);background:#fffaf0;border-radius:10px;padding:12px 16px;margin:12px 0}
.limit-box ul{margin:6px 0;padding-left:20px}
.limit-box p{margin:6px 0}
.range-tabs{display:flex;gap:6px;margin-bottom:10px}
.cb-range-btn{background:#e6eef5;color:var(--ink);border:none;border-radius:8px;padding:8px 14px;font-size:.95rem;cursor:pointer}
.cb-range-btn.active{background:var(--accent2);color:#fff}
.sliders output,.sliders span[id$="Val"]{min-width:2.2em;text-align:right;font-variant-numeric:tabular-nums}
/* 色調補正ワークスペース: 画像と比較しながら1画面で調整できるレイアウト */
.ws-menu{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.ws-main{display:grid;grid-template-columns:1fr;gap:16px;align-items:start}
@media(min-width:900px){.ws-main.with-panel{grid-template-columns:1fr 300px}}
.ws-images{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ws-fig{margin:0}
.ws-fig figcaption{font-size:.9rem;font-weight:600;margin-bottom:6px}
.img-frame{height:27vh;min-height:150px;display:flex;align-items:center;justify-content:center;background:#fbfcfe;border:1px solid var(--line);border-radius:8px;padding:6px}
.img-frame canvas{max-width:100%;max-height:100%;width:auto;height:auto;border:none}
.ws-panel{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fbfcfe}
.ws-panel p{margin:6px 0;display:flex;gap:6px;flex-wrap:wrap}
.ws-panel .range-tabs{margin-bottom:6px}
.ws-panel .sliders label{font-size:.88rem;margin:2px 0}
.ws-panel .sliders input[type=range]{width:38%}
@media(max-width:720px){.img-frame{height:22vh;min-height:120px}}

/* 1view (no-scroll) app layout: tabs fill the remaining viewport height */
.tab-panel{display:none}
.tab-panel.active{display:block;flex:1;min-height:0;overflow:auto;margin-bottom:0}
#gamutResult{max-height:30vh;overflow:auto}
.overlay-panel{position:fixed;inset:0;background:var(--bg);z-index:950;overflow:auto;padding:0 0 24px}
.overlay-bar{position:sticky;top:0;background:var(--ink);color:#fff;display:flex;justify-content:space-between;align-items:center;padding:10px 16px;margin-bottom:14px;z-index:2}
.overlay-bar button{background:#fff;color:var(--ink)}

#cbInfo{margin:4px 0}
#balance>p{margin:6px 0}

/* --- 2-view layout: top page (description + upload) / editor page --- */
.wrap-wide{max-width:1400px;margin:0 auto;padding:0 12px;width:100%}
#topView{justify-content:flex-start}
.hero{max-width:760px;margin:5vh auto 20px;width:100%}
.hero h2{font-size:1.3rem}
.big-drop{padding:26px 16px}
.big-drop-title{display:block;font-size:1.12rem;font-weight:700;margin-bottom:6px}
.hero-points{margin:10px 0;padding-left:20px}
#editorView{flex:1;min-height:0;display:flex;flex-direction:column}
.ed-bar{flex:none;display:flex;gap:14px;align-items:center;padding:6px 12px;flex-wrap:wrap}
.ed-main{flex:1;min-height:0;display:grid;grid-template-columns:1fr 340px;gap:14px;padding-bottom:10px}
.ed-stage{display:grid;grid-template-columns:1fr 1fr;gap:12px;min-height:0}
.ed-stage .ws-fig{display:flex;flex-direction:column;min-height:0;margin:0}
.fig-head{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;font-weight:600;font-size:.92rem;margin-bottom:6px;min-height:32px}
.img-frame.tall{flex:1;min-height:0;height:auto}
.ed-side{overflow:auto;display:flex;flex-direction:column;gap:12px;min-height:0}
.side-card{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#fff}
.side-card h3{margin:0 0 8px;font-size:1rem;color:var(--accent)}
.side-sub{font-weight:600;font-size:.9rem;margin:10px 0 4px}
.side-btns{display:flex;flex-direction:column;gap:6px;margin:0}
.side-btns button{text-align:left}
@media(max-width:900px){
  .ed-main{display:block;overflow:auto}
  .ed-stage{height:36vh;margin-bottom:12px}
  .ed-side{overflow:visible}
  #gamutResult{max-height:none;overflow:visible}
}
#stageModes{display:inline-flex;flex-wrap:nowrap;gap:4px}
#stageModes .mode-btn{padding:4px 8px;font-size:.78rem;white-space:nowrap}
@media(max-width:900px){
  #stageModes{flex-wrap:wrap}
  .fig-head{flex-direction:column;align-items:flex-start;gap:4px}
  .ed-stage{height:40vh}
}

/* --- top page: wide 2-column hero + feature row (fills PC side space) --- */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;margin-top:4vh}
.hero-copy h2{font-size:1.3rem}
.hero-upload{display:flex;flex-direction:column}
.hero-upload .big-drop{flex:1;display:flex;flex-direction:column;justify-content:center}
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
.feature-card h3{margin:0 0 6px;color:var(--accent);font-size:1.05rem}
.feature-card p{margin:4px 0;font-size:.92rem}
@media(max-width:900px){.hero-grid,.feature-row{grid-template-columns:1fr}}

/* 姉妹サイト */
.sister-nav{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:6px 0}
.sister-nav a{color:var(--accent);text-decoration:none;border:1px solid var(--line);background:#fff;border-radius:999px;padding:4px 14px;font-size:.85rem}
.sister-nav a:hover{border-color:var(--accent)}
.sister-nav .soon{color:#9fb3c8;border-style:dashed}
.sister-nav .here{background:var(--accent);color:#fff;border-color:var(--accent)}
@media(max-width:900px){
  .sister-nav{gap:5px;margin:4px 0}
  .sister-nav a{padding:2px 9px;font-size:.78rem}
  .site-footer p{margin:1px 0}
}
@media(max-width:900px){
  .sister-nav{display:block;line-height:2.1}
  .sister-nav a,.sister-nav .here,.sister-nav .soon{border:none;background:none;padding:0 3px;color:var(--accent)}
  .sister-nav .here{font-weight:700;text-decoration:underline}
  .sister-nav .soon{color:#9fb3c8}
}

/* ガイド記事 */
.article-body{line-height:1.9}
.article-body h2{margin-top:28px}
.article-body h3{margin-top:20px}
.article-body ul{padding-left:1.4em;margin:8px 0}
.article-body li{margin:4px 0}
.tool-link{background:#f0f7fa;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:18px 0}
.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin-top:10px}
.guide-grid a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:inherit;text-decoration:none;font-size:.92rem}
.guide-grid a:hover{border-color:var(--accent)}
.guide-grid a strong{color:var(--accent);display:block;margin-bottom:4px;font-size:1rem}
.guide-nav{border-top:1px solid var(--line);margin-top:26px;padding-top:12px}
.guide-nav a{color:var(--accent)}

/* 姉妹サイト開閉 */
.sister-toggle{background:transparent;border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:6px 18px;font-size:.9rem;cursor:pointer}
.sister-nav[hidden],.sister-slim[hidden]{display:none!important}

/* スマホでは説明文を折りたたむ */
.m-intro-btn{display:none}
@media (max-width:640px){
.m-intro{display:none}
.m-intro.open{display:block}
.m-intro-btn{display:inline-block;background:transparent;border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:5px 14px;font-size:.85rem;cursor:pointer;margin-top:4px}
}