:root{
  --bg: #f4f7f5;
  --surface: #ffffff;
  --text: #133321;
  --muted: #53635b;
  --border: #d4e1d7;
  --shadow: 0 10px 30px rgba(19, 51, 33, 0.10);
  --primary: #007f3e;
  --primary-2: #006533;
  --accent: #36b36a;
  --warn: #b54708;
  --warn-bg: #fff7ed;
  --info: #007f3e;
  --info-bg: #e6f3ea;
  --radius: 14px;
  --container: 980px;
  --sidebar: 180px;
}

*{ 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: linear-gradient(180deg, #e4f1e7 0%, var(--bg) 36%, var(--bg) 100%);
}

a{ color: var(--primary); text-decoration: none; }
a:hover{ text-decoration: underline; }

.skip-link{
  position:absolute;
  left:-9999px;
  top:8px;
  background: var(--surface);
  border:1px solid var(--border);
  padding:10px 12px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 1000;
}
.skip-link:focus{ left: 12px; }

.container{
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: #007f3e;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.header-inner{
  display:flex;
  justify-content: center;
  padding: 14px 0 10px;
}

.top-nav{
  display:inline-flex;
  gap: 8px;
  align-items:center;
  flex-wrap: wrap;
  padding: 6px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.8);
  background: #ffffff;
  box-shadow: 0 8px 20px rgba(0,0,0,0.18);
}
.top-nav .nav-link{
  padding: 9px 12px;
  border-radius: 999px;
  font-weight: 750;
  color: rgba(19,51,33,0.9);
  border: 1px solid transparent;
  letter-spacing: -0.01em;
}
.top-nav .nav-link:hover{
  background: rgba(11,99,206,0.10);
  border-color: rgba(11,99,206,0.16);
  text-decoration: none;
}
.top-nav .nav-link:focus-visible{
  outline: none;
  box-shadow: 0 0 0 4px rgba(11,99,206,0.16);
}

@media (max-width: 560px){
  .header-inner{
    justify-content: center;
    padding: 12px 0 8px;
  }
  .top-nav{
    width: min(100%, 360px);
    justify-content: space-between;
  }
}

.site-main{ padding: 22px 0 0; }

.layout{
  display:grid;
  grid-template-columns: minmax(0,1fr);
  gap: 18px;
  align-items: start;
}

.content{ min-width: 0; }

.hero h1{
  margin: 10px 0 10px;
  letter-spacing: -0.03em;
  line-height: 1.15;
  font-size: clamp(1.7rem, 2.6vw, 2.35rem);
}
.hero p{ color: var(--muted); font-size: 1.04rem; line-height: 1.6; margin: 0 0 14px; }

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin: 18px auto;
}

h2{
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}
.h3{ margin: 0 0 10px; }
.muted{ color: var(--muted); }

.notice{
  border-radius: 14px;
  padding: 14px 14px 12px;
  border: 1px solid var(--border);
  margin: 14px 0 0;
}
.notice-body{ color: var(--muted); margin-top: 6px; line-height: 1.55; }
.notice-info{
  background: var(--info-bg);
  border-color: rgba(11,99,206,0.25);
}
.notice-warn{
  background: var(--warn-bg);
  border-color: rgba(181,71,8,0.25);
}

.calc{
  margin-top: 12px;
  display:grid;
  gap: 14px;
}
.field label{
  font-weight: 650;
  display:block;
  margin-bottom: 6px;
}
.field input,
.field select{
  width:100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  outline: none;
  font-size: 1rem;
  background: #fbfdff;
}
.field input:focus,
.field select:focus{
  border-color: rgba(11,99,206,0.55);
  box-shadow: 0 0 0 4px rgba(11,99,206,0.12);
}
.help{
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}
.field-inline{ display:flex; align-items:center; gap:10px; }
.checkbox{ display:flex; align-items:center; gap:10px; color: var(--muted); }
.checkbox input{ width: 18px; height: 18px; }

.actions{ display:flex; gap: 10px; flex-wrap: wrap; margin-top: 2px; }
.btn{
  border: 1px solid rgba(11,99,206,0.25);
  background: linear-gradient(180deg, var(--primary), var(--primary-2));
  color: #fff;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}
.btn:hover{ filter: brightness(1.02); }
.btn:active{ transform: translateY(1px); }
.btn-ghost{
  background: transparent;
  color: var(--primary);
  border-color: rgba(11,99,206,0.25);
}
.btn-ghost:hover{
  background: rgba(11,99,206,0.06);
  text-decoration: none;
}

.results{ margin-top: 18px; }
.result-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.result{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: #fbfdff;
}
.result-label{ color: var(--muted); font-weight: 650; }
.result-value{
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-top: 6px;
}
.result-note{ color: var(--muted); margin-top: 6px; font-size: 0.95rem; }

.breakdown{
  margin-top: 14px;
  border-top: 1px dashed rgba(81,99,122,0.35);
  padding-top: 12px;
}
.bullets{ margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.6; }
.bullets strong{ color: var(--text); }

.link-cards{
  display:grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 12px 0;
}
.link-card{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: #fbfdff;
  display:block;
}
.link-card:hover{
  border-color: rgba(11,99,206,0.35);
  box-shadow: 0 10px 22px rgba(11,31,51,0.08);
  text-decoration: none;
}
.link-card-title{ font-weight: 800; letter-spacing: -0.01em; }
.link-card-desc{ color: var(--muted); margin-top: 6px; line-height: 1.5; }

.faq{ margin-top: 10px; display:grid; gap: 10px; }
.faq-item{
  border: 1px solid var(--border);
  background: #fbfdff;
  border-radius: 14px;
  overflow:hidden;
}
.faq-item summary{
  cursor:pointer;
  padding: 14px;
  font-weight: 800;
  list-style: none;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary:hover{ background: rgba(11,99,206,0.06); }
.faq-body{
  padding: 0 14px 14px;
  color: var(--muted);
  line-height: 1.6;
}
.faq-links{ margin-top: 10px; }
.faq-links a{ font-weight: 650; }

.ad-slot{
  border: 1px dashed rgba(81,99,122,0.45);
  background: rgba(246,248,251,0.7);
  border-radius: 14px;
  overflow:hidden;
}
.ad-slot__label{
  font-size: 0.80rem;
  color: var(--muted);
  padding: 8px 10px;
  border-bottom: 1px dashed rgba(81,99,122,0.35);
}
.ad-slot__box{
  padding: 16px 12px;
  color: rgba(81,99,122,0.95);
  text-align: center;
  min-height: 92px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.ad-inline{
  margin: 14px auto;
}
.ad-inline .ad-slot{
  max-width: 420px;
  margin: 0 auto;
}

.sidebar{ display:none; position: sticky; top: 90px; }
.sidebar .ad-slot__box{ min-height: 520px; }

.ad-mobile-top{ margin-top: 14px; }
.ad-mobile-top .ad-slot__box{ min-height: 110px; }

.site-footer{
  padding: 22px 0 30px;
  color: var(--muted);
}
.footer-inner{
  display:flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(217,226,238,0.9);
}
.footer-title{ font-weight: 900; color: var(--text); }
.footer-links{ display:flex; gap: 12px; flex-wrap: wrap; }

@media (min-width: 720px){
  .result-grid{ grid-template-columns: 1fr 1fr; }
  .link-cards{ grid-template-columns: 1fr 1fr; }
  .calc{ grid-template-columns: 1.2fr 0.8fr; }
  .field-inline{ grid-column: 1 / -1; }
  .actions{ grid-column: 1 / -1; }
}

@media (min-width: 1120px){
  .layout{
    width: min(calc(var(--container) + (var(--sidebar) * 2) + 72px), calc(100% - 32px));
    margin: 0 auto;
    grid-template-columns: var(--sidebar) minmax(0, var(--container)) var(--sidebar);
    gap: 18px;
  }
  .container{ width: 100%; }
  .sidebar{ display:block; }
  .ad-mobile-top{ display:none; }
}

@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}