/* ============================================
   AI Free Tools - Shared Stylesheet
   ============================================ */
:root{
  --color-bg:#f7f9fc;
  --color-surface:#ffffff;
  --color-border:#e3e8f0;
  --color-text:#1c2434;
  --color-text-muted:#5c6a7e;
  --color-primary:#2f6bff;
  --color-primary-dark:#1f4fd6;
  --color-primary-soft:#eaf0ff;
  --color-accent:#00b894;
  --color-danger:#e0453c;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:20px;
  --shadow-sm:0 1px 2px rgba(20,30,60,.06);
  --shadow-md:0 6px 20px rgba(20,30,60,.08);
  --maxw:1120px;
  font-size:16px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;}
a{color:var(--color-primary);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3{line-height:1.4;margin:0 0 .6em;}
p{margin:0 0 1em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* ---------- Header ---------- */
.site-header{
  background:var(--color-surface);
  border-bottom:1px solid var(--color-border);
  position:sticky;top:0;z-index:100;
}
.site-header .inner{
  max-width:var(--maxw);margin:0 auto;padding:14px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:var(--color-text);}
.logo:hover{text-decoration:none;}
.logo .mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--color-primary),var(--color-accent));
  color:#fff;font-size:1.05rem;font-weight:900;
}
.site-nav{display:flex;gap:22px;align-items:center;}
.site-nav a{color:var(--color-text-muted);font-weight:600;font-size:.94rem;}
.site-nav a:hover{color:var(--color-primary);text-decoration:none;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:.85rem;color:var(--color-text-muted);margin:18px 0;}
.breadcrumb a{color:var(--color-text-muted);}
.breadcrumb a:hover{color:var(--color-primary);}

/* ---------- Hero ---------- */
.hero{padding:56px 0 36px;text-align:center;}
.hero h1{font-size:2rem;font-weight:800;}
.hero p{color:var(--color-text-muted);font-size:1.05rem;max-width:640px;margin:0 auto 1.2em;}
.hero .badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px;}
.badge{
  background:var(--color-primary-soft);color:var(--color-primary-dark);
  font-size:.82rem;font-weight:700;padding:6px 14px;border-radius:999px;
}

/* ---------- Search box on top page ---------- */
.tool-search{max-width:480px;margin:22px auto 0;}
.tool-search input{
  width:100%;padding:13px 18px;border-radius:999px;border:1px solid var(--color-border);
  font-size:1rem;background:#fff;box-shadow:var(--shadow-sm);
}
.tool-search input:focus{outline:2px solid var(--color-primary);}

/* ---------- Tool grid / cards ---------- */
.section{padding:34px 0;}
.section-title{font-size:1.3rem;font-weight:800;margin-bottom:4px;}
.section-desc{color:var(--color-text-muted);margin-bottom:22px;font-size:.95rem;}

.tool-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;
}
.tool-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-md);padding:20px;
  box-shadow:var(--shadow-sm);transition:transform .12s ease,box-shadow .12s ease,border-color .12s ease;
}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--color-primary);text-decoration:none;}
.tool-card .icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;background:var(--color-primary-soft);
}
.tool-card h3{font-size:1.02rem;margin:0;color:var(--color-text);}
.tool-card p{font-size:.86rem;color:var(--color-text-muted);margin:0;}
.tool-card[data-cat="pdf"] .icon{background:#ffe9e6;}
.tool-card[data-cat="image"] .icon{background:#e9f7ef;}
.tool-card[data-cat="seo"] .icon{background:#eaf0ff;}
.tool-card[data-cat="text"] .icon{background:#fff6e0;}

/* ---------- Tool page layout ---------- */
.tool-page-header{padding:36px 0 10px;}
.tool-page-header .icon-lg{
  width:56px;height:56px;border-radius:14px;background:var(--color-primary-soft);
  display:flex;align-items:center;justify-content:center;font-size:1.8rem;margin-bottom:14px;
}
.tool-page-header h1{font-size:1.6rem;font-weight:800;}
.tool-page-header p{color:var(--color-text-muted);max-width:640px;}

.panel{
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-sm);margin-bottom:24px;
}
.panel + .panel{margin-top:0;}

.dropzone{
  border:2px dashed var(--color-border);border-radius:var(--radius-md);
  padding:34px 20px;text-align:center;cursor:pointer;background:#fbfcff;transition:border-color .15s,background .15s;
}
.dropzone:hover,.dropzone.dragover{border-color:var(--color-primary);background:var(--color-primary-soft);}
.dropzone .dz-icon{font-size:2rem;margin-bottom:8px;}
.dropzone .dz-main{font-weight:700;}
.dropzone .dz-sub{font-size:.82rem;color:var(--color-text-muted);margin-top:4px;}

.form-row{margin-bottom:16px;}
.form-row label{display:block;font-weight:700;font-size:.88rem;margin-bottom:6px;}
.form-row .hint{font-size:.78rem;color:var(--color-text-muted);margin-top:4px;}
input[type=text],input[type=number],input[type=url],input[type=password],textarea,select{
  width:100%;padding:11px 13px;border:1px solid var(--color-border);border-radius:var(--radius-sm);
  font-size:.95rem;font-family:inherit;background:#fff;color:var(--color-text);
}
textarea{resize:vertical;min-height:110px;}
input:focus,textarea:focus,select:focus{outline:2px solid var(--color-primary);border-color:transparent;}
.inline-fields{display:flex;gap:14px;flex-wrap:wrap;}
.inline-fields > div{flex:1;min-width:140px;}
.checkbox-row{display:flex;align-items:center;gap:8px;font-size:.9rem;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--color-primary);color:#fff;border:none;border-radius:999px;
  padding:12px 26px;font-size:.95rem;font-weight:700;cursor:pointer;transition:background .15s,opacity .15s;
}
.btn:hover{background:var(--color-primary-dark);}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.btn.btn-secondary{background:var(--color-surface);color:var(--color-primary);border:1px solid var(--color-primary);}
.btn.btn-secondary:hover{background:var(--color-primary-soft);}
.btn.btn-sm{padding:8px 16px;font-size:.85rem;}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:18px;}

.result-box{margin-top:18px;}
.result-box.hidden{display:none;}
.output-text{
  width:100%;min-height:90px;padding:13px;border-radius:var(--radius-sm);
  border:1px solid var(--color-border);background:#fbfcff;font-size:.92rem;white-space:pre-wrap;
}
.score-ring{width:120px;height:120px;margin:0 auto;}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:16px;}
.stat-box{background:#fbfcff;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:14px;text-align:center;}
.stat-box .num{font-size:1.5rem;font-weight:800;}
.stat-box .label{font-size:.78rem;color:var(--color-text-muted);}

.check-list{list-style:none;padding:0;margin:0;}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--color-border);font-size:.9rem;
}
.check-list li:last-child{border-bottom:none;}
.check-list .tag{
  flex-shrink:0;font-size:.72rem;font-weight:800;border-radius:6px;padding:3px 8px;
}
.tag.ok{background:#e6f8ef;color:#0a8a4c;}
.tag.warn{background:#fff3d6;color:#9a6b00;}
.tag.bad{background:#fde9e8;color:#c0392b;}

.file-list{list-style:none;padding:0;margin:14px 0 0;display:flex;flex-direction:column;gap:8px;}
.file-list li{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:#fbfcff;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:9px 12px;font-size:.86rem;
}
.file-list li .fname{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.file-list li button{background:none;border:none;color:var(--color-danger);cursor:pointer;font-size:.85rem;font-weight:700;}
.file-list li.sortable{cursor:grab;}
.file-list li .grip{color:var(--color-text-muted);margin-right:6px;}

.copy-btn{background:none;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:6px 12px;font-size:.8rem;cursor:pointer;font-weight:700;color:var(--color-primary);}
.copy-btn:hover{background:var(--color-primary-soft);}

.progress{height:8px;border-radius:99px;background:var(--color-border);overflow:hidden;margin-top:14px;display:none;}
.progress .bar{height:100%;width:0;background:var(--color-primary);transition:width .2s;}

.note-box{
  background:#fff6e0;border:1px solid #f3dfa3;border-radius:var(--radius-sm);
  padding:12px 14px;font-size:.83rem;color:#7a5b00;margin-top:16px;
}
.privacy-note{
  display:flex;gap:10px;align-items:flex-start;background:#eaf6ef;border:1px solid #c9ecd6;
  border-radius:var(--radius-sm);padding:12px 14px;font-size:.83rem;color:#136c3f;margin-bottom:20px;
}

/* ---------- Ad slots (placeholders for AdSense / affiliate) ---------- */
.ad-slot{
  background:#f0f2f7;border:1px dashed var(--color-border);border-radius:var(--radius-sm);
  padding:18px;text-align:center;color:var(--color-text-muted);font-size:.78rem;margin:26px 0;
}

/* 標準的なバナー広告サイズの枠。実際の広告ネットワークのタグをそのまま挿入できるよう
   中身を空にして使う想定（現在はプレースホルダー表示）。 */
.banner-ad{
  position:relative;max-width:728px;min-height:90px;margin:22px auto;
  display:flex;align-items:center;justify-content:center;
  background:#f0f2f7;border:1px dashed var(--color-border);border-radius:var(--radius-sm);
  color:var(--color-text-muted);font-size:.78rem;overflow:hidden;
}
.banner-ad.rect{max-width:300px;min-height:250px;}
.banner-ad::before{
  content:"広告";position:absolute;top:6px;left:10px;font-size:.65rem;
  color:#9aa5b8;letter-spacing:.05em;font-weight:700;
}
@media(max-width:640px){
  .banner-ad{max-width:320px;min-height:100px;}
}
.affiliate-box{
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:18px;margin-top:26px;
}
.affiliate-box h4{font-size:.9rem;margin:0 0 10px;color:var(--color-text-muted);}
.affiliate-links{display:flex;flex-direction:column;gap:8px;}
.affiliate-links a{
  display:block;padding:10px 14px;border:1px solid var(--color-border);border-radius:var(--radius-sm);
  font-size:.88rem;font-weight:600;color:var(--color-text);
}
.affiliate-links a:hover{border-color:var(--color-primary);text-decoration:none;background:var(--color-primary-soft);}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--color-border);padding:14px 0;}
.faq-item summary{font-weight:700;cursor:pointer;font-size:.94rem;}
.faq-item p{margin-top:10px;color:var(--color-text-muted);font-size:.88rem;}

/* ---------- Footer ---------- */
.site-footer{background:#131a2b;color:#a9b4c7;margin-top:60px;padding:44px 0 24px;font-size:.86rem;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:24px;margin-bottom:28px;}
.footer-grid h5{color:#fff;font-size:.85rem;margin:0 0 12px;}
.footer-grid ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;}
.footer-grid a{color:#a9b4c7;}
.footer-grid a:hover{color:#fff;}
.footer-bottom{border-top:1px solid #263149;padding-top:18px;text-align:center;color:#6c7893;font-size:.78rem;}

@media(max-width:640px){
  .site-nav{display:none;}
  .hero h1{font-size:1.5rem;}
  .panel{padding:18px;}
}