/* =========================================
   相続税シミュレーター — Glassmorphism Design System
   ========================================= */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  /* Accent — Emerald green (trust / money) */
  --accent:#059669;--accent-light:#34d399;--accent-dark:#047857;
  --accent-glow:rgba(5,150,105,.15);
  --gradient-accent:linear-gradient(135deg,#059669,#10b981,#34d399);

  /* Surfaces */
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --glass-border:rgba(255,255,255,.45);
  --glass-shadow:0 8px 32px rgba(0,0,0,.08);
  --blur:20px;

  /* Backgrounds */
  --bg-body:#f0fdf4;

  /* Text */
  --text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;

  /* Semantic */
  --green-500:#22c55e;--green-600:#16a34a;--red-500:#ef4444;--amber-500:#f59e0b;
  --blue-50:#eff6ff;--blue-100:#dbeafe;--blue-500:#3b82f6;--blue-600:#2563eb;
  --purple-500:#8b5cf6;--cyan-500:#06b6d4;--orange-500:#f97316;
  --emerald-50:#ecfdf5;--emerald-100:#d1fae5;--emerald-500:#10b981;--emerald-700:#047857;

  /* Layout */
  --radius:16px;--radius-lg:24px;--radius-sm:10px;
}

html{font-size:16px;scroll-behavior:smooth}

body{
  font-family:'Noto Sans JP',system-ui,-apple-system,sans-serif;
  color:var(--text-primary);line-height:1.7;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  background:var(--bg-body);
  /* Mesh gradient background — emerald / teal */
  background-image:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(52,211,153,.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(5,150,105,.12) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 10%, rgba(6,182,212,.10) 0%, transparent 50%);
  background-attachment:fixed;
}

/* ---- Container ---- */
.container{max-width:900px;margin:0 auto;padding:0 16px 40px}

/* ---- Glass Card ---- */
.card{
  background:var(--glass-strong);
  backdrop-filter:blur(var(--blur));
  -webkit-backdrop-filter:blur(var(--blur));
  border-radius:var(--radius-lg);
  border:1px solid var(--glass-border);
  box-shadow:var(--glass-shadow);
  padding:28px;
  margin-bottom:20px;
  transition:box-shadow .2s,transform .2s;
}
.card:hover{box-shadow:0 12px 40px rgba(0,0,0,.10)}

/* ---- Hero ---- */
.hero{text-align:center;padding:36px 0 12px}
.hero h1{
  font-size:clamp(1.3rem,4.5vw,1.8rem);font-weight:900;
  background:var(--gradient-accent);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  letter-spacing:-.03em;
}
.hero-sub{font-size:.88rem;color:var(--text-secondary);margin-top:6px;line-height:1.6}

/* ---- Section Titles ---- */
.section-title{
  font-size:1.1rem;font-weight:800;color:var(--text-primary);
  margin-bottom:16px;padding-left:12px;
  border-left:4px solid var(--accent);
}
.section-subtitle{
  font-size:.9rem;font-weight:700;color:var(--text-secondary);
  margin-bottom:12px;
}

/* ---- Slider Group ---- */
.slider-group{margin-bottom:18px}
.slider-group label{
  display:flex;justify-content:space-between;align-items:baseline;
  font-size:.85rem;font-weight:700;color:var(--text-secondary);
  margin-bottom:4px;
}
.slider-value{
  font-size:1rem;font-weight:900;color:var(--accent-dark);
  font-variant-numeric:tabular-nums;
}
input[type=range]{
  -webkit-appearance:none;appearance:none;
  width:100%;height:6px;border-radius:3px;
  background:rgba(5,150,105,.15);
  outline:none;margin:8px 0 4px;
  transition:background .2s;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:24px;height:24px;border-radius:50%;
  background:var(--gradient-accent);
  cursor:pointer;border:3px solid #fff;
  box-shadow:0 2px 8px rgba(5,150,105,.35);
  transition:transform .15s;
}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}
input[type=range]::-moz-range-thumb{
  width:24px;height:24px;border-radius:50%;
  background:var(--accent);cursor:pointer;
  border:3px solid #fff;
  box-shadow:0 2px 8px rgba(5,150,105,.35);
}
.slider-labels{display:flex;justify-content:space-between;font-size:.7rem;color:var(--text-muted)}

/* ---- Number Input (direct edit) ---- */
.number-input{
  width:120px;padding:6px 10px;border-radius:var(--radius-sm);
  border:1px solid rgba(5,150,105,.2);
  font-size:.9rem;font-family:inherit;font-weight:700;
  color:var(--accent-dark);text-align:right;
  background:rgba(255,255,255,.7);
  backdrop-filter:blur(8px);
  transition:border-color .2s,box-shadow .2s;
}
.number-input:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-glow);
}

/* ---- Toggle Group ---- */
.toggle-group{display:flex;flex-direction:column;gap:14px;margin-bottom:18px}
.toggle-item{
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.5);backdrop-filter:blur(10px);
  border:1px solid rgba(5,150,105,.1);
  transition:background .2s,border-color .2s;
}
.toggle-item:has(input:checked){
  background:rgba(5,150,105,.06);
  border-color:rgba(5,150,105,.25);
}
.toggle-item input[type=checkbox]{
  width:20px;height:20px;accent-color:var(--accent);flex-shrink:0;
}
.toggle-item label{font-size:.85rem;font-weight:600;color:var(--text-secondary);cursor:pointer}
.toggle-item .toggle-desc{font-size:.75rem;color:var(--text-muted);margin-top:2px}

/* ---- Select ---- */
.select-group{margin-bottom:18px}
.select-group label{font-size:.85rem;font-weight:700;color:var(--text-secondary);display:block;margin-bottom:6px}
.select-group select{
  padding:10px 12px;border-radius:var(--radius-sm);
  border:1px solid rgba(5,150,105,.2);
  font-size:.9rem;font-family:inherit;
  background:rgba(255,255,255,.7);color:var(--text-primary);
  backdrop-filter:blur(8px);
  transition:border-color .2s,box-shadow .2s;
  width:100%;
}
.select-group select:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-glow);
}

/* ---- Result Card ---- */
.result-card{
  background:linear-gradient(135deg,rgba(5,150,105,.08),rgba(16,185,129,.04));
  border:1px solid rgba(5,150,105,.2);
  border-radius:var(--radius-lg);
  padding:28px;
  text-align:center;
  margin-bottom:20px;
}
.result-label{font-size:.85rem;color:var(--text-secondary);font-weight:700}
.result-amount{display:flex;align-items:baseline;justify-content:center;gap:4px;margin-top:4px}
.big-number{
  font-size:2.6rem;font-weight:900;line-height:1.2;
  background:var(--gradient-accent);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  transition:all .3s ease;
}
.big-number.zero{-webkit-text-fill-color:var(--green-600)}
.result-unit{font-size:1rem;color:var(--text-muted);font-weight:700}
.result-sub{font-size:.9rem;color:var(--text-secondary);margin-top:8px}
.result-sub span{font-weight:700;color:var(--accent-dark)}

/* ---- Tax Bar (horizontal stacked bar) ---- */
.tax-bar-container{margin:20px 0}
.tax-bar-label{font-size:.82rem;font-weight:700;color:var(--text-secondary);margin-bottom:8px}
.tax-bar{
  display:flex;height:32px;border-radius:8px;overflow:hidden;
  background:rgba(5,150,105,.06);
}
.tax-bar-segment{
  display:flex;align-items:center;justify-content:center;
  font-size:.7rem;font-weight:700;color:#fff;
  transition:width .5s ease;
  min-width:0;overflow:hidden;white-space:nowrap;
}
.tax-bar-legend{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;
}
.tax-bar-legend-item{display:flex;align-items:center;gap:4px;font-size:.75rem;color:var(--text-secondary)}
.legend-dot{display:inline-block;width:10px;height:10px;border-radius:50%;flex-shrink:0}

/* ---- Breakdown Table ---- */
.breakdown{margin-top:16px}
.breakdown h2{font-size:1rem;font-weight:700;margin-bottom:12px;color:var(--text-primary)}
.breakdown-table{width:100%;border-collapse:collapse}
.breakdown-table td{padding:8px 4px;font-size:.9rem;border-bottom:1px solid rgba(5,150,105,.08)}
.breakdown-table .amount{text-align:right;font-weight:700;font-variant-numeric:tabular-nums}
.breakdown-table .subtotal td{background:rgba(5,150,105,.04);font-weight:700;font-size:.85rem}
.breakdown-table .total-row td{border-top:2px solid rgba(5,150,105,.2);font-weight:900;font-size:.95rem}
.breakdown-table .indent td:first-child{padding-left:20px;color:var(--text-muted);font-size:.82rem}

/* ---- Heir Table ---- */
.heir-table{width:100%;border-collapse:collapse;margin-top:12px}
.heir-table th{
  text-align:left;font-size:.8rem;font-weight:700;
  color:var(--text-secondary);padding:8px;
  background:rgba(5,150,105,.04);
  border-bottom:2px solid rgba(5,150,105,.15);
}
.heir-table td{
  padding:8px;font-size:.88rem;
  border-bottom:1px solid rgba(5,150,105,.08);
  font-variant-numeric:tabular-nums;
}
.heir-table td.amount{text-align:right;font-weight:700}
.heir-table tr:last-child td{border-bottom:none}

/* ---- Chart Area ---- */
.chart-area{display:flex;justify-content:center;padding:20px 0}
.chart-wrapper{position:relative;max-width:400px;width:100%;margin:0 auto}

/* ---- Explain Content ---- */
.explain-content h2{font-size:1.1rem;font-weight:800;color:var(--text-primary);margin:24px 0 8px}
.explain-content h2:first-child{margin-top:0}
.explain-content h3{font-size:.95rem;font-weight:700;color:var(--text-primary);margin:18px 0 6px}
.explain-content p{font-size:.88rem;color:var(--text-secondary);margin-bottom:10px;line-height:1.8}
.explain-content ul,.explain-content ol{padding-left:20px;margin:8px 0 12px}
.explain-content li{font-size:.85rem;color:var(--text-secondary);margin-bottom:6px;line-height:1.7}
.explain-content strong{color:var(--text-primary)}
.explain-content a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(5,150,105,.3)}
.explain-content a:hover{border-bottom-color:var(--accent)}

/* ---- FAQ ---- */
.faq-item{
  padding:16px;margin-bottom:12px;
  border-radius:var(--radius-sm);
  background:rgba(255,255,255,.5);
  backdrop-filter:blur(10px);
  border:1px solid rgba(5,150,105,.1);
}
.faq-item summary{
  font-size:.9rem;font-weight:700;color:var(--text-primary);
  cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:1.2rem;font-weight:400;color:var(--accent);
  transition:transform .2s;
}
.faq-item[open] summary::after{content:"\2212"}
.faq-item .faq-answer{
  font-size:.85rem;color:var(--text-secondary);
  margin-top:10px;line-height:1.7;
  padding-top:10px;border-top:1px solid rgba(5,150,105,.08);
}

/* ---- Footer ---- */
.footer{
  background:rgba(15,23,42,.85);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  color:rgba(255,255,255,.6);
  padding:28px 16px;text-align:center;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-inner{max-width:900px;margin:0 auto}
.footer-links{display:flex;justify-content:center;gap:20px;margin-bottom:12px;flex-wrap:wrap}
.footer-links a{color:rgba(255,255,255,.6);text-decoration:none;font-size:.85rem;transition:color .2s}
.footer-links a:hover{color:#fff}
.copyright{font-size:.75rem;color:rgba(255,255,255,.35)}

/* ---- Ad slots ---- */
.ad-slot{max-width:900px;margin:0 auto;min-height:0;text-align:center}

/* ---- Conditions ---- */
.conditions-section h2{font-size:1rem;font-weight:700;color:var(--text-primary);margin-bottom:12px}
.conditions-section ul{padding-left:20px}
.conditions-section li{font-size:.8rem;color:var(--text-muted);margin-bottom:4px}

/* ---- Quick result cards ---- */
.quick-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
.quick-card{
  padding:22px;border-radius:var(--radius);text-align:center;
  background:var(--glass);backdrop-filter:blur(12px);
  border:1px solid var(--glass-border);
  transition:transform .2s,box-shadow .2s;
}
.quick-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.quick-card .qc-label{font-size:.8rem;font-weight:700;color:var(--text-secondary);margin-bottom:4px}
.quick-card .qc-amount{font-size:1.5rem;font-weight:900;line-height:1.2}
.quick-card .qc-sub{font-size:.75rem;color:var(--text-muted);margin-top:4px}

/* ---- Guide article ---- */
.article-meta{
  font-size:.8rem;color:var(--text-muted);margin-bottom:16px;
  padding-bottom:12px;border-bottom:1px solid rgba(5,150,105,.1);
}
.article-toc{
  padding:16px;margin-bottom:20px;
  border-radius:var(--radius-sm);
  background:rgba(5,150,105,.04);
  border:1px solid rgba(5,150,105,.1);
}
.article-toc-title{font-size:.85rem;font-weight:700;margin-bottom:8px}
.article-toc ol{padding-left:20px}
.article-toc li{font-size:.82rem;margin-bottom:4px}
.article-toc a{color:var(--accent);text-decoration:none}
.article-toc a:hover{text-decoration:underline}

/* ---- Preset Buttons ---- */
.preset-section{margin-bottom:20px}
.preset-section .section-title{margin-bottom:10px}
.preset-hint{font-size:.8rem;color:var(--text-muted);margin-bottom:14px}
.preset-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.preset-btn{
  display:flex;flex-direction:column;align-items:center;
  padding:20px 14px;border-radius:var(--radius);
  background:rgba(255,255,255,.65);backdrop-filter:blur(10px);
  border:2px solid rgba(5,150,105,.18);
  cursor:pointer;transition:all .2s;
  text-align:center;
}
.preset-btn:hover{
  background:rgba(5,150,105,.08);
  border-color:rgba(5,150,105,.4);
  transform:translateY(-3px);
  box-shadow:0 6px 20px rgba(5,150,105,.15);
}
.preset-btn.active{
  background:rgba(5,150,105,.12);
  border-color:var(--accent);
  box-shadow:0 0 0 4px var(--accent-glow);
}
.preset-icon{font-size:2rem;margin-bottom:6px}
.preset-name{font-size:1rem;font-weight:800;color:var(--text-primary);line-height:1.4}
.preset-desc{font-size:.82rem;color:var(--text-secondary);margin-top:4px;line-height:1.4}

/* ---- Responsive: Tablet ---- */
@media(max-width:768px){
  .container{padding:0 12px 32px}
  .card{padding:22px 18px}
  .big-number{font-size:2.2rem}
  .quick-cards{grid-template-columns:1fr 1fr}
}

/* ---- Responsive: Mobile ---- */
@media(max-width:480px){
  .container{padding:0 8px 20px}
  .card{padding:16px 10px;border-radius:var(--radius);margin-bottom:14px}
  .hero{padding:24px 0 8px}
  .hero h1{font-size:1.35rem}
  .hero-sub{font-size:.8rem}
  .big-number{font-size:1.8rem}
  .quick-cards{grid-template-columns:1fr}
  .tax-bar{height:24px}
  .tax-bar-legend{gap:8px}
  .heir-table{font-size:.8rem}
  .heir-table th,.heir-table td{padding:6px 4px}
  .number-input{width:100px}
  .preset-grid{grid-template-columns:1fr 1fr;gap:10px}
  .preset-btn{padding:16px 10px}
  .preset-icon{font-size:1.6rem}
  .preset-name{font-size:.88rem}
  .preset-desc{font-size:.75rem}
  .footer{padding:20px 8px}
  .breakdown-table td{font-size:.82rem;padding:6px 2px}
  .slider-value{font-size:.9rem}
  input[type=range]{height:8px}
  input[type=range]::-webkit-slider-thumb{width:28px;height:28px}
}

/* ---- Result card pulse animation ---- */
@keyframes result-pulse {
  0% { box-shadow: 0 0 0 0 rgba(5,150,105,.4); }
  70% { box-shadow: 0 0 0 12px rgba(5,150,105,0); }
  100% { box-shadow: 0 0 0 0 rgba(5,150,105,0); }
}
.result-card.pulse { animation: result-pulse .6s ease-out; }

/* ---- Card entrance animation ---- */
.card, .result-card { opacity: 0; transform: translateY(20px); transition: opacity .5s ease, transform .5s ease; }
.card.visible, .result-card.visible { opacity: 1; transform: none; }

/* ---- Heir table zebra & hover ---- */
.heir-table tbody tr:nth-child(even) td { background: rgba(5,150,105,.03); }
.heir-table tbody tr:hover td { background: rgba(5,150,105,.07); transition: background .15s; }

/* ---- Floating scroll-to-result button ---- */
.scroll-to-result {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  display: flex; align-items: center; gap: 8px;
  padding: 14px 22px; border-radius: 50px;
  background: var(--gradient-accent); color: #fff;
  font-size: .88rem; font-weight: 700; font-family: inherit;
  border: none; cursor: pointer;
  box-shadow: 0 4px 20px rgba(5,150,105,.35);
  opacity: 0; transform: translateY(20px);
  transition: opacity .3s, transform .3s;
  pointer-events: none;
}
.scroll-to-result.show { opacity: 1; transform: none; pointer-events: auto; }
.scroll-to-result:hover { box-shadow: 0 6px 28px rgba(5,150,105,.5); transform: translateY(-2px); }
.scroll-to-result:active { transform: scale(.96); }

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .card, .result-card { opacity: 1; transform: none; transition: none; }
  .result-card.pulse { animation: none; }
  .scroll-to-result { transition: none; }
}