:root{
  --bg1:#0b1020;
  --bg2:#070a12;
  --glass: rgba(255,255,255,.08);
  --stroke: rgba(255,255,255,.16);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.65);
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --accent: #7c5cff;
  --accent2: #3ee0b8;
  --danger: #ff4d6d;
}

body.light{
  --bg1:#f6f7fb;
  --bg2:#e9ecf6;
  --glass: rgba(0,0,0,.05);
  --stroke: rgba(0,0,0,.12);
  --text: rgba(0,0,0,.88);
  --muted: rgba(0,0,0,.58);
  --shadow: 0 18px 60px rgba(0,0,0,.18);
  --accent: #5b7cff;
  --accent2: #09b587;
  --danger: #e11d48;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background: radial-gradient(900px 600px at 15% 20%, var(--bg1), var(--bg2));
  overflow-x:hidden;
}

.bg{
  position:fixed;
  inset:0;
  z-index:-1;
  filter:saturate(1.1);
}
.orb{
  position:absolute;
  width:520px;
  height:520px;
  border-radius:50%;
  background: radial-gradient(circle at 30% 30%, rgba(124,92,255,.55), rgba(124,92,255,0));
  mix-blend-mode: screen;
  opacity:.85;
  animation: float 9s ease-in-out infinite;
}
.o1{ left:-180px; top:-160px; }
.o2{
  right:-220px; top:80px;
  background: radial-gradient(circle at 30% 30%, rgba(62,224,184,.55), rgba(62,224,184,0));
  animation-duration: 11s;
}
.o3{
  left:24%; bottom:-260px;
  background: radial-gradient(circle at 30% 30%, rgba(255,77,109,.45), rgba(255,77,109,0));
  animation-duration: 13s;
}

@keyframes float{
  0%,100%{ transform: translate(0,0) scale(1); }
  50%{ transform: translate(18px,-22px) scale(1.03); }
}

.wrap{
  min-height:100%;
  display:grid;
  grid-template-columns: 1fr 340px;
  gap:18px;
  padding:28px;
  max-width: 1080px;
  margin:0 auto;
}

.calc{
  background: linear-gradient(180deg, var(--glass), rgba(255,255,255,.03));
  border:1px solid var(--stroke);
  border-radius: 26px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  padding:18px;
}

.top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  padding:8px 6px 16px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
}
.logo{
  width:40px;
  height:40px;
  border-radius:14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 14px 30px rgba(0,0,0,.25);
}
.name{ font-weight:800; letter-spacing:.3px; }
.tag{ font-size:12px; color:var(--muted); margin-top:2px; }

.toggles{ display:flex; gap:8px; flex-wrap:wrap; justify-content:flex-end; }
.chip{
  border:1px solid var(--stroke);
  background: rgba(255,255,255,.06);
  color:var(--text);
  padding:8px 10px;
  border-radius: 999px;
  cursor:pointer;
  font-weight:700;
  font-size:12px;
  transition: transform .08s ease, background .2s ease, border-color .2s ease;
}
.chip:active{ transform: translateY(1px) scale(.99); }
.chip.on{
  background: linear-gradient(135deg, rgba(124,92,255,.35), rgba(62,224,184,.25));
  border-color: rgba(124,92,255,.55);
}

.display{
  border:1px solid var(--stroke);
  border-radius: 22px;
  padding:16px 14px 12px;
  background: rgba(0,0,0,.12);
  margin-bottom: 14px;
}

body.light .display{ background: rgba(255,255,255,.5); }

.line{ width:100%; text-align:right; word-break:break-word; }
.line.small{
  min-height: 20px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing:.2px;
}
.line.big{
  min-height: 44px;
  font-size: 34px;
  font-weight: 850;
  letter-spacing: .4px;
}

.meta{
  margin-top:10px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
}
.pills{ display:flex; gap:8px; flex-wrap:wrap; }
.pill{
  font-size:12px;
  padding:6px 10px;
  border-radius: 999px;
  border:1px solid var(--stroke);
  background: rgba(255,255,255,.06);
  color: var(--muted);
}
.mini-actions{ display:flex; gap:8px; }
.mini{
  font-size:12px;
  padding:7px 10px;
  border-radius: 12px;
  border:1px solid var(--stroke);
  background: rgba(255,255,255,.06);
  color: var(--text);
  cursor:pointer;
}

.grid{
  display:grid;
  grid-template-columns: repeat(6, 1fr);
  gap:10px;
}

.key{
  border: 1px solid var(--stroke);
  border-radius: 18px;
  background: rgba(255,255,255,.06);
  color: var(--text);
  padding: 14px 10px;
  font-size: 14px;
  font-weight: 750;
  cursor:pointer;
  transition: transform .08s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
  user-select:none;
}
.key:hover{
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.22);
}
.key:active{ transform: translateY(1px) scale(.99); }

.key.op{
  background: linear-gradient(180deg, rgba(124,92,255,.22), rgba(124,92,255,.10));
  border-color: rgba(124,92,255,.45);
}
.key.fn{
  background: linear-gradient(180deg, rgba(62,224,184,.18), rgba(62,224,184,.08));
  border-color: rgba(62,224,184,.42);
}
.key.danger{
  background: linear-gradient(180deg, rgba(255,77,109,.22), rgba(255,77,109,.10));
  border-color: rgba(255,77,109,.5);
}
.key.soft{
  background: rgba(255,255,255,.05);
}
.key.num{
  background: rgba(255,255,255,.08);
}
.key.wide{
  grid-column: span 2;
}

.history{
  border-radius: 26px;
  border:1px solid var(--stroke);
  background: linear-gradient(180deg, var(--glass), rgba(255,255,255,.03));
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  padding: 16px;
  height: fit-content;
  max-height: calc(100vh - 56px);
  position: sticky;
  top: 28px;
  overflow: hidden;
  display:flex;
  flex-direction:column;
}

.hist-head{ padding: 6px 6px 12px; }
.hist-title{ font-weight:900; font-size:16px; }
.hist-sub{ font-size:12px; color:var(--muted); margin-top:4px; }

.hist-list{
  overflow:auto;
  padding-right: 6px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.item{
  border:1px solid var(--stroke);
  border-radius: 18px;
  background: rgba(255,255,255,.06);
  padding: 10px 12px;
  cursor:pointer;
}
.item .e{ color:var(--muted); font-size:12px; }
.item .r{ font-weight:900; margin-top:4px; text-align:right; }

@media (max-width: 980px){
  .wrap{ grid-template-columns: 1fr; }
  .history{ position:relative; top:auto; max-height: 280px; }
}