:root{
  --bg: #fbf5ee;
  --surface: #ffffff;
  --surface-soft: #fff3e8;
  --border: #ece0d1;
  --text: #2b2620;
  --text-muted: #8a7f70;
  --accent: #e8734a;
  --accent-dim: #e8734a1a;
  --accent-2: #2f9e8f;
  --accent-2-dim: #2f9e8f1a;
  --good: #2f9e8f;
  --bad: #d1495b;
  --radius: 16px;
  --radius-sm: 10px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
a{color:inherit;}

header{
  padding: 20px 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; }
.brand-mark{
  font-family:'Quicksand', sans-serif;
  font-weight:700;
  font-size:21px;
  color: var(--text);
  letter-spacing:-0.01em;
}
.brand-mark span{ color: var(--accent); }
nav.tools{ display:flex; gap:6px; flex-wrap:wrap; }
nav.tools a{
  font-size:13.5px;
  font-weight:600;
  color: var(--text-muted);
  text-decoration:none;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid transparent;
}
nav.tools a:hover{ background: var(--surface-soft); color: var(--text); }
nav.tools a.current{ color: #fff; background: var(--accent); }

main{
  flex:1;
  display:flex;
  flex-direction:column;
  padding: 28px 28px 48px;
  max-width:1100px;
  width:100%;
  margin:0 auto;
}

.intro{ margin-bottom:22px; text-align:center; }
h1{
  font-family:'Quicksand', sans-serif;
  font-size: clamp(26px, 4vw, 36px);
  margin:0 0 8px;
  font-weight:700;
  letter-spacing:-0.01em;
}
.intro p{ margin:0 auto; color:var(--text-muted); font-size:15.5px; max-width:520px; line-height:1.55; }

.calc-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 2px 14px rgba(43,38,32,0.04);
}

.mode-tabs{
  display:flex;
  gap:8px;
  margin-bottom:22px;
  flex-wrap:wrap;
}
.mode-tabs button{
  font-family:'Inter', sans-serif;
  font-weight:600;
  font-size:13.5px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor:pointer;
}
.mode-tabs button.active{ background: var(--accent); border-color:var(--accent); color:#fff; }

.field-row{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
  gap:16px;
  margin-bottom: 18px;
}
.field{ display:flex; flex-direction:column; gap:6px; }
.field label{ font-size:13px; font-weight:600; color:var(--text-muted); }
.field input[type="text"], .field input[type="number"], .field select, .field input[type="date"]{
  font-family:'Inter', sans-serif;
  font-size:16px;
  padding:11px 14px;
  border-radius: var(--radius-sm);
  border:1.5px solid var(--border);
  background: var(--bg);
  color: var(--text);
  outline:none;
  transition: border-color .15s ease;
}
.field input:focus, .field select:focus{ border-color: var(--accent); }

.field-inline-toggle{ display:flex; gap:8px; }
.field-inline-toggle button{
  flex:1;
  font-family:'Inter', sans-serif;
  font-weight:600;
  font-size:13px;
  padding:10px;
  border-radius: var(--radius-sm);
  border:1.5px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor:pointer;
}
.field-inline-toggle button.active{ background: var(--accent-2); border-color:var(--accent-2); color:#fff; }

input[type="range"]{
  width:100%;
  accent-color: var(--accent);
  height:6px;
}
.slider-value{
  font-family:'Quicksand', sans-serif;
  font-weight:700;
  font-size:22px;
  color: var(--accent);
  min-width:60px;
  text-align:right;
}
.slider-row{ display:flex; align-items:center; gap:14px; }

button.calc-btn{
  font-family:'Quicksand', sans-serif;
  font-weight:700;
  font-size:15px;
  color:#fff;
  background: var(--accent);
  border:none;
  padding:13px 22px;
  border-radius: 999px;
  cursor:pointer;
  transition: transform .1s ease, background .15s ease;
}
button.calc-btn:hover{ background:#d9633b; }
button.calc-btn:active{ transform: translateY(1px); }

.result-panel{
  margin-top: 22px;
  padding: 24px;
  background: var(--surface-soft);
  border-radius: var(--radius);
  text-align:center;
}
.result-panel .result-label{
  font-size:13px;
  font-weight:600;
  color: var(--text-muted);
  text-transform:uppercase;
  letter-spacing:0.04em;
  margin-bottom:6px;
}
.result-panel .result-value{
  font-family:'Quicksand', sans-serif;
  font-weight:700;
  font-size: clamp(32px, 6vw, 48px);
  color: var(--accent);
  line-height:1.1;
}
.result-panel .result-sub{
  margin-top:8px;
  font-size:14px;
  color: var(--text-muted);
}
.breakdown{
  margin-top:16px;
  display:flex;
  flex-direction:column;
  gap:8px;
  text-align:left;
}
.breakdown .row{
  display:flex;
  justify-content:space-between;
  font-size:14px;
  padding:8px 0;
  border-bottom:1px dashed var(--border);
}
.breakdown .row:last-child{ border-bottom:none; }
.breakdown .row .k{ color: var(--text-muted); }
.breakdown .row .v{ font-weight:600; }

.gauge-wrap{ display:flex; justify-content:center; margin-top:10px; }

.content-block{
  margin-top:40px;
  border-top:1px solid var(--border);
  padding-top:28px;
}
.content-block h2{ font-family:'Quicksand', sans-serif; font-size:20px; margin:0 0 10px; }
.content-block p{ color:var(--text-muted); font-size:14.5px; line-height:1.65; margin:0 0 14px; }
.faq-item{ margin-bottom:16px; }
.faq-item h3{ font-size:15px; margin:0 0 4px; color:var(--text); }
.faq-item p{ margin:0; }

.tool-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(230px,1fr));
  gap:16px;
  margin-top:24px;
}
.tool-card{
  border:1px solid var(--border);
  background:var(--surface);
  border-radius:var(--radius);
  padding:22px;
  text-decoration:none;
  color:var(--text);
  display:flex;
  flex-direction:column;
  gap:8px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.tool-card:hover{ transform: translateY(-3px); box-shadow: 0 8px 20px rgba(43,38,32,0.08); }
.tool-card .emoji{ font-size:28px; }
.tool-card h3{ font-family:'Quicksand', sans-serif; margin:0; font-size:18px; }
.tool-card p{ margin:0; color:var(--text-muted); font-size:13.5px; line-height:1.5; }

footer{
  text-align:center;
  padding:22px;
  font-size:13px;
  color: var(--text-muted);
  border-top:1px solid var(--border);
  background: var(--surface);
}
footer a{ color: var(--accent); text-decoration:underline; }

.toast{
  position:fixed;
  bottom:24px;
  left:50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color:#fff;
  padding:11px 20px;
  border-radius:999px;
  font-size:13.5px;
  opacity:0;
  pointer-events:none;
  transition: all .25s ease;
  z-index:100;
}
.toast.show{ opacity:1; transform: translateX(-50%) translateY(0); }

@media (max-width: 600px){
  main{ padding: 20px 16px 40px; }
  .calc-card{ padding:20px; }
}