:root{
  --bg:#ffffff;
  --bg-soft:#f9fafb;
  --border:#e5e7eb;
  --text:#111827;
  --muted:#6b7280;

  --good:#2563eb;   /* blue */
  --ok:#f59e0b;     /* amber */
  --bad:#ef4444;    /* red */

  --shadow: 0 2px 14px rgba(0,0,0,.06);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:var(--bg);
}

/* ===== NicheWorks base (minimal subset) ===== */
.nw-header{
  padding:18px 12px 8px;
  border-bottom:1px solid var(--border);
  background:var(--bg);
  text-align:center;
}
.nw-title{
  margin:0;
  font-size:20px;
  line-height:1.25;
  letter-spacing:-0.01em;
}
.nw-subtitle{
  margin:8px auto 0;
  max-width:42em;
  font-size:12px;
  color:var(--muted);
}
.nw-main{
  max-width:600px;   /* スマホ寄りツール */
  margin:0 auto;
  padding:12px 12px 6px;
}
.ad-slot{
  margin:12px 0 16px;
  padding:8px;
  border:1px dashed #d4d4d4;
  font-size:11px;
  color:#9ca3af;
  text-align:center;
  min-height:60px;
}
.ad-top{ margin-top:4px; }
.ad-bottom{ margin-bottom:8px; }

.nw-footer{
  margin-top:24px;
  padding:16px 8px 12px;
  border-top:1px solid var(--border);
  font-size:11px;
  color:var(--muted);
  text-align:center;
  line-height:1.6;
}
.nw-footer-line{ margin:2px 0; }
.nw-footer a{ color:var(--muted); text-decoration:underline; }

.nw-lang-switch{
  text-align:center;
  margin:6px 0 0;
  font-size:11px;
  color:var(--muted);
}
.nw-lang-switch button{
  border:none;
  background:transparent;
  padding:0 2px;
  cursor:pointer;
  font-size:11px;
  color:#4b5563;
}
.nw-lang-switch button.active{
  font-weight:600;
  text-decoration:underline;
}

/* donate */
.nw-donate{
  text-align:center;
  margin:16px 0 8px;
  padding:8px 0;
  font-size:12px;
  color:var(--muted);
}
.nw-donate-text{ margin:4px 0; }
.nw-donate-links{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:8px;
  margin-top:6px;
}
.nw-donate-links a{
  display:inline-block;
  padding:8px 14px;
  border:1px solid #d1d5db;
  border-radius:10px;
  background:#fff;
  font-size:13px;
  color:var(--text);
  text-decoration:none;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.nw-donate-links a:hover{
  background:var(--bg-soft);
  transform:translateY(-1px);
  box-shadow:0 1px 3px rgba(0,0,0,.10);
}

/* internal links */
.nw-links{
  text-align:center;
  font-size:12px;
  color:var(--muted);
  margin:12px 0 0;
}
.nw-links a{ color:var(--muted); text-decoration:underline; }

/* ===== Tool UI ===== */
.panel{
  border:1px solid var(--border);
  border-radius:16px;
  padding:12px;
  background:var(--bg);
  box-shadow:var(--shadow);
}

.controls{
  display:flex;
  gap:10px;
  align-items:flex-start;
  justify-content:space-between;
  flex-wrap:wrap;
  margin-bottom:10px;
}

.control-group{
  min-width: 220px;
  flex: 1 1 220px;
}

.label{
  margin:0 0 6px;
  font-size:12px;
  color:var(--muted);
  font-weight:600;
}

.segmented{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}

.seg{
  flex:1 1 auto;
  border:1px solid var(--border);
  background:#fff;
  border-radius:12px;
  padding:10px 10px;
  font-size:13px;
  cursor:pointer;
  min-height:40px;
}
.seg.active{
  border-color:#9ca3af;
  box-shadow:0 1px 0 rgba(0,0,0,.04);
  font-weight:600;
}

.inputs{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.input-row{
  padding:10px;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--bg-soft);
}

.input-head{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:10px;
  margin-bottom:8px;
}

.input-label{
  font-size:13px;
  color:var(--text);
  font-weight:600;
}

.input-value{
  font-size:13px;
  color:var(--muted);
  min-width: 48px;
  text-align:right;
}

input[type="range"]{
  width:100%;
}

.result-wrap{
  margin-top:12px;
}

.result-card{
  border-radius:18px;
  border:1px solid var(--border);
  background:#fff;
  padding:14px;
  box-shadow:var(--shadow);
}

.result-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
}

.result-title{
  font-size:12px;
  color:var(--muted);
  font-weight:700;
  letter-spacing:.02em;
  text-transform:uppercase;
}

.result-score{
  font-size:34px;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1;
}
.score-denom{
  font-size:14px;
  font-weight:700;
  color:var(--muted);
  margin-left:6px;
}

.result-status{
  margin-top:10px;
  font-size:18px;
  font-weight:800;
}

.result-comment{
  margin:8px 0 0;
  font-size:13px;
  color:var(--text);
}

.result-tip{
  margin:10px 0 0;
  font-size:12px;
  color:var(--muted);
}

/* status color accents */
.status-good{
  border-color: rgba(37,99,235,.25);
  background: linear-gradient(180deg, rgba(37,99,235,.07), #ffffff 45%);
}
.status-ok{
  border-color: rgba(245,158,11,.25);
  background: linear-gradient(180deg, rgba(245,158,11,.08), #ffffff 45%);
}
.status-bad{
  border-color: rgba(239,68,68,.25);
  background: linear-gradient(180deg, rgba(239,68,68,.08), #ffffff 45%);
}

/* disclaimer */
.disclaimer{
  margin:14px 0 8px;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--bg-soft);
  font-size:12px;
  color:var(--muted);
  line-height:1.6;
}

/* ===== Responsive rules ===== */

/* <= 374px: tighten + force vertical button stack if needed */
@media (max-width: 374px){
  .nw-title{ font-size:18px; }
  .segmented{ flex-direction:column; }
  .seg{ width:100%; }
  .control-group{ min-width: 100%; }
  .result-score{ font-size:30px; }
}

/* 375–414px: keep tidy (default already ok) */

/* 415–480px: allow a bit more air */
@media (min-width: 415px) and (max-width: 480px){
  .nw-main{ padding-left:14px; padding-right:14px; }
}

/* 481–768px: 2-column layout (inputs left, result right) */
@media (min-width: 481px) and (max-width: 768px){
  .panel{ padding:14px; }
  .controls{ margin-bottom:12px; }
  .result-wrap{
    display:grid;
    grid-template-columns: 1fr;
  }
}

/* 769px+: make real 2-column main area */
@media (min-width: 769px){
  .nw-main{
    max-width: 960px;
    padding:16px 14px 8px;
  }

  /* Panel + Result side-by-side */
  main.nw-main{
    display:grid;
    grid-template-columns: 1.05fr .95fr;
    gap:14px;
    align-items:start;
  }

  .ad-top, .ad-bottom{
    grid-column: 1 / -1;
  }

  .panel{ grid-column: 1; }
  .result-wrap{ grid-column: 2; margin-top:0; }

  .nw-donate, .nw-links, .disclaimer{
    grid-column: 1 / -1;
  }
}

/* i18n (JS will toggle display) */
[data-i18n]{}