:root{
  --bg:#f4f4f4;
  --card:#ffffff;
  --text:#111111;
  --muted:#666666;
  --border:#e5e5e5;
  --brand:#ffd400;
  --brand-soft:#fff3a6;
  --chip:#f3f3f3;
  --chip-active:#111111;
  --chip-active-text:#ffffff;
  --shadow:0 10px 30px rgba(0,0,0,.06);
}
html[data-theme="dark"]{
  --bg:#070707;
  --card:#121212;
  --text:#f7f7f7;
  --muted:#a3a3a3;
  --border:#2a2a2a;
  --brand:#ffd400;
  --brand-soft:#6a5b00;
  --chip:#181818;
  --chip-active:#ffffff;
  --chip-active-text:#111111;
  --shadow:0 16px 40px rgba(0,0,0,.34);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
}
.app{
  max-width:720px;
  margin:0 auto;
  padding:12px 16px 120px;
}
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:12px;
}
.topbar-actions{
  display:flex;
  align-items:center;
  gap:8px;
}
.menu-wrap{position:relative}
.menu-panel{
  position:absolute;
  top:48px;
  right:0;
  width:220px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow:var(--shadow);
  padding:12px;
  z-index:40;
}
.menu-title{
  font-size:13px;
  color:var(--muted);
  margin-bottom:10px;
}
.menu-options{
  display:grid;
  gap:8px;
}
.menu-option{
  appearance:none;
  -webkit-appearance:none;
  border:1px solid var(--border);
  background:var(--chip);
  color:var(--text);
  min-height:44px;
  border-radius:14px;
  padding:0 14px;
  font-size:14px;
  font-weight:800;
  text-align:left;
  cursor:pointer;
}
.menu-option.active{
  background:var(--chip-active);
  color:var(--chip-active-text);
  border-color:var(--chip-active);
}

.brand{
  display:flex;
  align-items:center;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text);
  line-height:1;
}
.brand-letter,
.brand-word{
  font-weight:900;
  font-size:34px;
  letter-spacing:.02em;
}

.brand-bolt{
  display:inline-block;
  color:var(--brand);
  font-size:42px;
  line-height:1;
  font-weight:900;
  transform:translateY(-1px);
  margin:0 2px;
}


.icon-btn,.ghost-btn{
  appearance:none;
  -webkit-appearance:none;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  border-radius:12px;
  width:40px;
  height:40px;
  min-width:40px;
  min-height:40px;
  padding:0;
  cursor:pointer;
  display:grid;
  place-items:center;
  font-size:20px;
  line-height:1;
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:24px;
  box-shadow:var(--shadow);
  padding:16px;
  margin-bottom:14px;
}
.hero h1{margin:0;font-size:28px;line-height:1.1}
.flow{padding-bottom:8px}

.scenario-bar{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}
.preset-title{font-weight:800}
.preset-sub{font-size:13px;color:var(--muted);margin-top:4px}
.scenario-chips{
  flex-shrink:0;
  justify-content:flex-end;
}

.step{
  border:1px solid var(--border);
  border-radius:20px;
  padding:14px;
  margin-bottom:14px;
}
.step.hidden,.dynamic-block.hidden,.result.hidden,.hidden{display:none}

.flow.compact .step{
  padding:12px;
  margin-bottom:10px;
}
.flow.compact .step-head{margin-bottom:8px}
.flow.compact .step-sub{font-size:12px}
.flow.compact .field label{margin-bottom:6px}
.flow.compact input,
.flow.compact select{
  padding:12px 12px;
  font-size:15px;
}
.flow.compact .chip{padding:10px 12px}

.step-head{
  display:flex;
  gap:12px;
  align-items:flex-start;
  margin-bottom:12px;
}
.step-num{
  width:28px;height:28px;border-radius:999px;
  display:grid;place-items:center;
  background:#ffffff;
  color:#111111;
  font-weight:900;
  flex:0 0 28px;
  border:1px solid #d9d9d9;
}
.step-title{font-weight:800}
.step-sub{font-size:13px;color:var(--muted);margin-top:2px}

.chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.age-chips{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
}
.age-chip{
  text-align:center;
  white-space:nowrap;
  min-width:0;
}

.chip{
  border:1px solid var(--border);
  background:var(--chip);
  color:var(--text);
  border-radius:999px;
  padding:12px 14px;
  cursor:pointer;
  font-weight:800;
}
.chip.active{
  background:var(--chip-active);
  color:var(--chip-active-text);
  border-color:var(--chip-active);
}

.field label{
  display:block;
  margin-bottom:8px;
  font-size:14px;
  color:var(--muted);
}
.field-inline{
  display:grid;
  grid-template-columns:minmax(0,1fr) 112px;
  gap:10px;
  align-items:center;
}
input, select{
  width:100%;
  border:1px solid var(--border);
  background:transparent;
  color:var(--text);
  border-radius:16px;
  padding:14px 14px;
  font-size:16px;
  outline:none;
}

select{
  background-color:var(--card);
  color:var(--text);
}

select option{
  background-color:var(--card);
  color:var(--text);
}

html[data-theme="dark"] select{
  background-color:#101010;
  color:#f7f7f7;
}

html[data-theme="dark"] select option{
  background-color:#101010;
  color:#f7f7f7;
}

html[data-theme="light"] select{
  background-color:#ffffff;
  color:#111111;
}

html[data-theme="light"] select option{
  background-color:#ffffff;
  color:#111111;
}
.unit-select{
  min-width:112px;
  font-weight:800;
}

.hybrid-topline{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.hybrid-scheme-chips{
  flex:1 1 auto;
}
.hybrid-checkbox{
  display:inline-flex;
  align-items:center;
  gap:10px;
  cursor:pointer;
  user-select:none;
  min-height:44px;
  color:var(--text);
}
.hybrid-checkbox input{
  position:absolute;
  opacity:0;
  pointer-events:none;
}
.hybrid-checkbox-box{
  width:22px;
  height:22px;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--chip);
  position:relative;
  flex:0 0 22px;
}
.hybrid-checkbox input:checked + .hybrid-checkbox-box{
  background:var(--brand);
  border-color:var(--brand);
}
.hybrid-checkbox input:checked + .hybrid-checkbox-box::after{
  content:"✓";
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  color:#111;
  font-size:14px;
  font-weight:900;
}
.hybrid-checkbox-text{
  font-size:15px;
  font-weight:800;
  color:var(--text);
}

.top14{margin-top:14px}

.result-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}
.share-btn{
  appearance:none;
  -webkit-appearance:none;
  border:1px solid rgba(255,212,0,.45);
  background:rgba(255,212,0,.10);
  color:var(--text);
  font-size:14px;
  font-weight:900;
  border-radius:16px;
  min-height:40px;
  padding:0 14px;
  cursor:pointer;
  flex-shrink:0;
}
.share-btn:active{transform:translateY(1px)}
.muted{color:var(--muted)}
.small{font-size:13px}
.result-total{
  font-size:32px;
  font-weight:900;
  margin-top:4px;
}
.result-list > div{
  display:flex;
  justify-content:space-between;
  gap:12px;
  padding:10px 0;
  border-bottom:1px solid var(--border);
}
.result-list > div.hidden{display:none}
.result-list > div:last-child{border-bottom:none}

.bottom-bar{
  position:fixed;
  left:0;right:0;bottom:0;
  padding:12px;
  backdrop-filter:blur(14px);
  background:rgba(0,0,0,.08);
}
.bottom-bar-inner{
  max-width:720px;
  margin:0 auto;
  background:var(--card);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  border-radius:22px;
  padding:12px;
  display:flex;
  align-items:center;
  gap:12px;
}
.bottom-hint{
  flex:1;
  font-size:13px;
  color:var(--muted);
  min-width:0;
}
.bottom-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

.secondary-btn{
  appearance:none;
  -webkit-appearance:none;
  border:1px solid var(--border);
  background:var(--chip);
  color:var(--text);
  font-size:16px;
  font-weight:900;
  border-radius:18px;
  min-height:52px;
  min-width:140px;
  padding:0 18px;
  cursor:pointer;
  box-shadow:none;
  outline:none;
}
.secondary-btn:hover{border-color:var(--brand)}
.secondary-btn:active{transform:translateY(1px)}

.primary-btn{
  border:1px solid #d9d9d9;
  background:#ffffff;
  color:#111111;
  font-size:16px;
  font-weight:900;
  border-radius:18px;
  min-height:52px;
  min-width:170px;
  padding:0 18px;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
}

.primary-btn:hover{
  background:#f3f3f3;
}
.primary-btn:active{
  transform:translateY(1px);
}
.primary-btn:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
.primary-btn:disabled{
  opacity:.45;
  cursor:not-allowed;
}
.primary-btn.loading{
  cursor:wait;
}

html[data-theme="dark"] .primary-btn{
  background:#ffffff;
  color:#111111;
  border-color:#ffffff;
}
html[data-theme="dark"] .primary-btn:hover{
  background:#f1f1f1;
}

.btn-spinner{
  width:18px;
  height:18px;
  border:2px solid rgba(17,17,17,.25);
  border-top-color:#111;
  border-radius:999px;
  animation:calc-spin .8s linear infinite;
  flex:0 0 18px;
}
@keyframes calc-spin{
  to{transform:rotate(360deg)}
}

@media (max-width:640px){
  .app{padding:10px 12px 116px}
  .hero h1{font-size:24px}
  .brand-letter,.brand-word{font-size:26px}
  .brand-bolt{font-size:32px}
  .icon-btn,.ghost-btn{width:38px;height:38px;min-width:38px;min-height:38px}
  .scenario-bar{flex-direction:column}
  .scenario-chips{justify-content:flex-start}
  .field-inline{grid-template-columns:minmax(0,1fr) 98px}
  .menu-panel{right:0;left:auto;width:210px}
  .bottom-bar-inner{align-items:stretch;flex-direction:column}
  .bottom-actions{display:grid;grid-template-columns:1fr 1fr}
  .primary-btn,.secondary-btn{width:100%}
  .age-chip{
    font-size:13px;
    padding:10px 8px;
  }
}

html[data-theme="dark"] .card{
  box-shadow:
    0 16px 42px rgba(0,0,0,.42),
    0 0 0 1px rgba(255,255,255,.02),
    0 0 24px rgba(255,212,0,.05);
}

html[data-theme="dark"] .step{
  background:rgba(255,255,255,.01);
  border-color:#2d2d2d;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.02),
    0 0 18px rgba(255,212,0,.035);
}

html[data-theme="dark"] .bottom-bar{
  background:rgba(5,5,5,.58);
}

html[data-theme="dark"] .bottom-bar-inner{
  box-shadow:
    0 10px 30px rgba(0,0,0,.35),
    0 0 20px rgba(255,212,0,.03);
}

html[data-theme="dark"] .icon-btn,
html[data-theme="dark"] .menu-panel,
html[data-theme="dark"] .secondary-btn,
html[data-theme="dark"] input,
html[data-theme="dark"] select{
  box-shadow:inset 0 1px 0 rgba(255,255,255,.02);
}

html[data-theme="dark"] .hero.card{
  background:linear-gradient(180deg,#101010 0%, #121212 100%);
}

html[data-theme="dark"] .share-btn{
  background:rgba(255,212,0,.08);
  border-color:rgba(255,212,0,.22);
}

html[data-theme="dark"] .step-num{
  box-shadow:
    0 1px 0 rgba(255,255,255,.12),
    0 0 10px rgba(255,255,255,.06);
}