/* tn-lab ツールズ — 共通スタイル */
:root {
  --primary: #1565c0;
  --primary-l: #1e88e5;
  --accent:  #ff6f00;
  --bg:      #f5f7fa;
  --white:   #ffffff;
  --border:  #e0e6ed;
  --text:    #212529;
  --muted:   #6c757d;
  --shadow:  0 2px 12px rgba(0,0,0,0.08);
  --radius:  8px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);font-size:15px}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* Header */
header{background:var(--primary);color:#fff;padding:0 16px;box-shadow:0 2px 8px rgba(0,0,0,0.2)}
.header-inner{max-width:1100px;margin:0 auto;display:flex;align-items:center;height:54px;gap:20px}
.site-logo{font-size:1.2rem;font-weight:700;color:#fff;white-space:nowrap}
.site-logo span{color:#ffcc02}
nav{display:flex;gap:4px;flex-wrap:wrap}
nav a{color:rgba(255,255,255,0.85);padding:5px 12px;border-radius:4px;font-size:0.85rem}
nav a:hover{background:rgba(255,255,255,0.15);color:#fff;text-decoration:none}

/* Breadcrumb */
.breadcrumb{background:var(--white);border-bottom:1px solid var(--border);padding:8px 16px;font-size:0.8rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}

/* Ad banner */
.ad-banner{background:var(--white);border:1px dashed #ccc;text-align:center;padding:10px;color:var(--muted);font-size:0.8rem;margin:12px auto;max-width:1100px}
.ad-label{font-size:0.65rem;display:block;margin-bottom:4px}
.ad-slot{min-height:90px;display:flex;align-items:center;justify-content:center;background:#f0f4f8}

/* Container */
.container{max-width:1100px;margin:0 auto;padding:20px 16px}

/* Homepage hero */
.hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-l) 100%);color:#fff;padding:36px 16px;text-align:center}
.hero h1{font-size:1.8rem;margin-bottom:8px}
.hero p{opacity:0.9;font-size:1rem}
.search-bar{margin:16px auto 0;max-width:480px;display:flex;gap:8px}
.search-bar input{flex:1;padding:10px 14px;border:none;border-radius:6px;font-size:1rem}
.search-bar button{background:var(--accent);color:#fff;border:none;padding:10px 20px;border-radius:6px;cursor:pointer;font-weight:700}

/* Category */
.category-title{font-size:1rem;font-weight:700;color:var(--primary);margin:24px 0 12px;padding-left:10px;border-left:4px solid var(--primary)}

/* Tool cards grid */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;margin-bottom:24px}
.tool-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:16px;transition:all .2s;cursor:pointer}
.tool-card:hover{box-shadow:var(--shadow);border-color:var(--primary-l);transform:translateY(-2px)}
.tool-card .icon{font-size:1.8rem;margin-bottom:8px}
.tool-card h3{font-size:0.9rem;font-weight:700;margin-bottom:4px;color:var(--text)}
.tool-card p{font-size:0.75rem;color:var(--muted);line-height:1.4}

/* Tool page */
.tool-header{margin-bottom:20px}
.tool-header h1{font-size:1.4rem;font-weight:700;margin-bottom:6px}
.tool-header p{color:var(--muted);font-size:0.9rem}

.tool-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.tool-box label{display:block;font-size:0.85rem;font-weight:700;margin-bottom:6px;color:var(--text)}
textarea,input[type=text],input[type=number],select{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:6px;
  font-size:0.9rem;font-family:inherit;resize:vertical;
  transition:border-color .2s
}
textarea:focus,input:focus,select:focus{outline:none;border-color:var(--primary-l)}
textarea{min-height:120px}

.btn{display:inline-block;padding:10px 24px;border-radius:6px;font-size:0.9rem;font-weight:700;cursor:pointer;border:none;transition:all .2s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-l)}
.btn-secondary{background:#e9ecef;color:var(--text)}
.btn-secondary:hover{background:#dee2e6}
.btn-copy{background:var(--accent);color:#fff;font-size:0.8rem;padding:6px 14px}
.btn-row{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

.output-area{background:#f8f9fa;border:1px solid var(--border);border-radius:6px;padding:12px;min-height:80px;font-family:'Courier New',monospace;font-size:0.85rem;white-space:pre-wrap;word-break:break-all}

.stat-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:12px}
.stat{background:var(--bg);border-radius:6px;padding:10px 16px;text-align:center;min-width:80px}
.stat .num{font-size:1.4rem;font-weight:700;color:var(--primary)}
.stat .lbl{font-size:0.7rem;color:var(--muted)}

/* Tabs */
.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:16px}
.tab{padding:8px 18px;cursor:pointer;font-size:0.85rem;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-2px}
.tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:700}

/* Toast */
.toast{position:fixed;bottom:20px;right:20px;background:#333;color:#fff;padding:10px 20px;border-radius:8px;font-size:0.85rem;opacity:0;transition:opacity .3s;pointer-events:none;z-index:999}
.toast.show{opacity:1}

/* Footer */
footer{background:var(--white);border-top:1px solid var(--border);padding:20px 16px;text-align:center;color:var(--muted);font-size:0.8rem;margin-top:40px}
footer a{color:var(--muted)}

/* Responsive */
@media(max-width:600px){
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:1.4rem}
  .header-inner{flex-wrap:wrap;height:auto;padding:8px 0}
  nav{display:none}
}