/* ============================================================
   NOVA Calculator — стили
   Тема управляется атрибутом [data-theme] на <body>
   ============================================================ */

:root{
  --radius: 26px;
  --key-radius: 18px;
  --font-ui: "Space Grotesk", system-ui, sans-serif;
  --font-num: "Orbitron", "Space Grotesk", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

/* ---------- Темы ---------- */
[data-theme="aurora"]{
  --bg-a:#120a2e; --bg-b:#070512;
  --accent:#8b7bff; --accent-2:#33e6c0; --accent-3:#ff6ad5;
  --glass: rgba(255,255,255,.055);
  --glass-brd: rgba(255,255,255,.10);
  --txt:#f3f0ff; --txt-dim:#a99fd6;
  --key: rgba(255,255,255,.05); --key-brd: rgba(255,255,255,.08);
  --fn:#b9aeff; --op-txt:#33e6c0;
}
[data-theme="sunset"]{
  --bg-a:#2b0d18; --bg-b:#140406;
  --accent:#ff8a3d; --accent-2:#ff477e; --accent-3:#ffd166;
  --glass: rgba(255,255,255,.06);
  --glass-brd: rgba(255,255,255,.10);
  --txt:#fff2ea; --txt-dim:#e0a58f;
  --key: rgba(255,255,255,.05); --key-brd: rgba(255,255,255,.09);
  --fn:#ffc1a6; --op-txt:#ffd166;
}
[data-theme="neon"]{
  --bg-a:#001018; --bg-b:#000508;
  --accent:#00e5ff; --accent-2:#ff2bd6; --accent-3:#c6ff00;
  --glass: rgba(0,229,255,.05);
  --glass-brd: rgba(0,229,255,.18);
  --txt:#eafcff; --txt-dim:#69c7d6;
  --key: rgba(0,229,255,.04); --key-brd: rgba(0,229,255,.14);
  --fn:#7fe9ff; --op-txt:#c6ff00;
}
[data-theme="ocean"]{
  --bg-a:#04203a; --bg-b:#020a14;
  --accent:#38bdf8; --accent-2:#22d3ee; --accent-3:#a78bfa;
  --glass: rgba(255,255,255,.05);
  --glass-brd: rgba(255,255,255,.10);
  --txt:#eaf6ff; --txt-dim:#8fb3cc;
  --key: rgba(255,255,255,.045); --key-brd: rgba(255,255,255,.08);
  --fn:#bfe6ff; --op-txt:#22d3ee;
}
[data-theme="mono"]{
  --bg-a:#1a1a1d; --bg-b:#0a0a0b;
  --accent:#e9e9ee; --accent-2:#9aa0b4; --accent-3:#c9c9d2;
  --glass: rgba(255,255,255,.045);
  --glass-brd: rgba(255,255,255,.09);
  --txt:#f4f4f7; --txt-dim:#9a9aa8;
  --key: rgba(255,255,255,.045); --key-brd: rgba(255,255,255,.08);
  --fn:#cfcfd8; --op-txt:#e9e9ee;
}

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

html,body{ height:100%; }

body{
  font-family:var(--font-ui);
  color:var(--txt);
  background:var(--bg-b);
  min-height:100vh;
  display:grid;
  place-items:center;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  transition:background .6s ease, color .6s ease;
}

/* ============================================================
   Живой фон
   ============================================================ */
.bg{ position:fixed; inset:0; z-index:0; overflow:hidden;
  background:
    radial-gradient(1200px 800px at 15% 10%, var(--bg-a), transparent 60%),
    radial-gradient(1000px 900px at 85% 90%, var(--bg-a), transparent 55%),
    linear-gradient(160deg, var(--bg-a), var(--bg-b) 70%);
  transition:background .6s ease;
}
.orb{ position:absolute; border-radius:50%; filter:blur(70px); opacity:.55;
  mix-blend-mode:screen; animation:float 18s ease-in-out infinite; }
.orb-1{ width:420px; height:420px; background:var(--accent);   top:-8%; left:-6%; }
.orb-2{ width:380px; height:380px; background:var(--accent-2); bottom:-10%; right:-4%; animation-delay:-6s; }
.orb-3{ width:300px; height:300px; background:var(--accent-3); top:40%; left:55%; animation-delay:-11s; opacity:.4; }
@keyframes float{
  0%,100%{ transform:translate(0,0) scale(1); }
  33%{ transform:translate(60px,-40px) scale(1.12); }
  66%{ transform:translate(-40px,50px) scale(.92); }
}
.grid-overlay{ position:absolute; inset:0; opacity:.06;
  background-image:linear-gradient(var(--txt) 1px, transparent 1px),
                   linear-gradient(90deg, var(--txt) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse at center, black, transparent 75%);
}

/* ============================================================
   Корпус калькулятора
   ============================================================ */
.calc{
  position:relative; z-index:1;
  width:min(680px, 94vw);
  margin:28px auto;
  padding:22px;
  border-radius:var(--radius);
  background:linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.02));
  border:1px solid var(--glass-brd);
  backdrop-filter:blur(24px) saturate(140%);
  -webkit-backdrop-filter:blur(24px) saturate(140%);
  box-shadow:
    0 30px 80px rgba(0,0,0,.55),
    0 0 0 1px rgba(255,255,255,.03) inset,
    0 1px 0 rgba(255,255,255,.15) inset;
  animation:rise .7s cubic-bezier(.2,.8,.2,1);
}
@keyframes rise{ from{ opacity:0; transform:translateY(24px) scale(.98); } to{ opacity:1; transform:none; } }

/* ---------- Верхняя панель ---------- */
.topbar{ display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
.brand{ display:flex; align-items:baseline; gap:8px; }
.brand-mark{ color:var(--accent-2); font-size:20px; filter:drop-shadow(0 0 8px var(--accent-2)); }
.brand-name{ font-family:var(--font-num); font-weight:900; letter-spacing:3px; font-size:20px;
  background:linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.brand-sub{ font-size:11px; color:var(--txt-dim); letter-spacing:2px; text-transform:uppercase; }
.tools{ display:flex; gap:8px; }
.tool{ font-family:var(--font-ui); font-size:13px; font-weight:600; color:var(--txt-dim);
  background:var(--glass); border:1px solid var(--glass-brd); border-radius:12px;
  min-width:40px; height:34px; padding:0 10px; cursor:pointer; transition:.18s; }
.tool:hover{ color:var(--txt); border-color:var(--accent); box-shadow:0 0 14px -4px var(--accent); transform:translateY(-1px); }
.tool.active{ color:var(--txt); background:color-mix(in srgb, var(--accent) 22%, transparent); border-color:var(--accent); }

/* ---------- Темы ---------- */
.themes{ display:flex; gap:9px; margin-bottom:14px; }
.dot{ width:20px; height:20px; border-radius:50%; cursor:pointer; border:2px solid transparent;
  transition:.2s; box-shadow:0 0 0 1px rgba(255,255,255,.15) inset; }
.dot:hover{ transform:scale(1.18); }
.dot.sel{ border-color:#fff; transform:scale(1.15); }
.d-aurora{ background:linear-gradient(135deg,#8b7bff,#33e6c0); }
.d-sunset{ background:linear-gradient(135deg,#ff8a3d,#ff477e); }
.d-neon{   background:linear-gradient(135deg,#00e5ff,#ff2bd6); }
.d-ocean{  background:linear-gradient(135deg,#38bdf8,#a78bfa); }
.d-mono{   background:linear-gradient(135deg,#e9e9ee,#6b6b78); }

/* ============================================================
   Дисплей
   ============================================================ */
.display{
  position:relative; margin-bottom:18px; padding:18px 20px 16px;
  border-radius:20px; min-height:130px;
  background:linear-gradient(180deg, rgba(0,0,0,.32), rgba(0,0,0,.14));
  border:1px solid var(--glass-brd);
  box-shadow:0 10px 30px rgba(0,0,0,.35) inset, 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  display:flex; flex-direction:column; justify-content:flex-end;
}
.display::after{ content:""; position:absolute; inset:0; pointer-events:none;
  background:linear-gradient(120deg, transparent 30%, color-mix(in srgb,var(--accent) 8%, transparent) 50%, transparent 70%); }
.chips{ position:absolute; top:12px; left:16px; display:flex; gap:7px; }
.chip{ font-size:10px; font-weight:700; letter-spacing:1px; padding:3px 8px; border-radius:8px;
  color:var(--txt-dim); background:var(--glass); border:1px solid var(--glass-brd);
  opacity:.4; transition:.2s; }
.chip.on{ opacity:1; color:#fff; background:color-mix(in srgb,var(--accent) 30%, transparent); border-color:var(--accent); box-shadow:0 0 12px -3px var(--accent); }
.expr{ font-family:var(--font-mono); font-size:16px; color:var(--txt-dim);
  min-height:22px; text-align:right; word-break:break-all; line-height:1.4; opacity:.85; }
.result{ font-family:var(--font-num); font-weight:700; font-size:clamp(30px,7vw,50px);
  text-align:right; line-height:1.1; word-break:break-all; cursor:pointer;
  background:linear-gradient(90deg, var(--txt), var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent;
  text-shadow:0 0 30px color-mix(in srgb,var(--accent-2) 30%, transparent); transition:.15s; }
.result:active{ transform:scale(.99); }
.result.flash{ animation:flashPop .4s ease; }
@keyframes flashPop{ 0%{ transform:scale(1); } 40%{ transform:scale(1.06); filter:brightness(1.4); } 100%{ transform:scale(1); } }
.display.shake{ animation:shake .35s; }
@keyframes shake{ 0%,100%{transform:translateX(0)} 20%{transform:translateX(-8px)} 40%{transform:translateX(7px)} 60%{transform:translateX(-5px)} 80%{transform:translateX(4px)} }

/* ============================================================
   Клавиатура
   ============================================================ */
.pads{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.pad{ display:grid; grid-template-columns:repeat(4,1fr); gap:10px; }

.key{
  position:relative; overflow:hidden;
  font-family:var(--font-ui); font-weight:600; font-size:18px;
  color:var(--txt);
  height:56px; border-radius:var(--key-radius);
  background:linear-gradient(180deg, color-mix(in srgb,var(--key) 60%, rgba(255,255,255,.08)), var(--key));
  border:1px solid var(--key-brd);
  cursor:pointer; user-select:none;
  transition:transform .09s cubic-bezier(.2,.8,.2,1), box-shadow .18s, border-color .18s, background .18s;
  box-shadow:0 4px 12px rgba(0,0,0,.3), 0 1px 0 rgba(255,255,255,.12) inset;
}
.key::before{ content:""; position:absolute; inset:0; border-radius:inherit;
  background:linear-gradient(180deg, rgba(255,255,255,.18), transparent 45%); opacity:.6; pointer-events:none; }
.key:hover{ transform:translateY(-2px); border-color:var(--accent);
  box-shadow:0 10px 22px rgba(0,0,0,.4), 0 0 22px -8px var(--accent), 0 1px 0 rgba(255,255,255,.18) inset; }
.key:active,.key.pressed{ transform:translateY(1px) scale(.93);
  box-shadow:0 2px 6px rgba(0,0,0,.35) inset, 0 0 26px -6px var(--accent); }
.key.pressed{ animation:pulseGlow .28s ease; }
@keyframes pulseGlow{ 0%{ box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 55%, transparent) inset; }
  100%{ box-shadow:0 2px 6px rgba(0,0,0,.35) inset; } }

.key.num{ font-family:var(--font-num); font-weight:700; }
.key.fn{ font-size:15px; color:var(--fn);
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.015)); }
.key.op{ color:var(--op-txt); font-size:22px; font-weight:700;
  background:linear-gradient(180deg, color-mix(in srgb,var(--accent) 16%, transparent), color-mix(in srgb,var(--accent) 6%, transparent));
  border-color:color-mix(in srgb,var(--accent) 30%, transparent); }
.key.util{ font-size:14px; color:var(--txt-dim); }
.key.util.danger{ color:var(--accent-3); }
.key.eq{ color:#0a0a12; font-size:26px; font-weight:800;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  border:none; box-shadow:0 8px 24px -4px var(--accent), 0 1px 0 rgba(255,255,255,.4) inset; }
.key.eq::after{ content:""; position:absolute; top:0; left:-60%; width:40%; height:100%;
  background:linear-gradient(100deg, transparent, rgba(255,255,255,.55), transparent);
  transform:skewX(-18deg); animation:shine 3.4s ease-in-out infinite; }
@keyframes shine{ 0%,60%{ left:-60%; } 85%,100%{ left:130%; } }
.key.eq:hover{ transform:translateY(-2px); box-shadow:0 14px 30px -4px var(--accent), 0 1px 0 rgba(255,255,255,.4) inset; }

/* Ripple */
.ripple{ position:absolute; border-radius:50%; transform:scale(0);
  background:radial-gradient(circle, rgba(255,255,255,.55), transparent 70%);
  animation:ripple .6s ease-out; pointer-events:none; }
@keyframes ripple{ to{ transform:scale(2.6); opacity:0; } }

/* ============================================================
   Панель истории
   ============================================================ */
.panel{ position:fixed; top:0; right:0; height:100%; width:320px; max-width:88vw; z-index:20;
  background:linear-gradient(180deg, rgba(20,16,40,.92), rgba(8,6,18,.96));
  border-left:1px solid var(--glass-brd); backdrop-filter:blur(20px);
  transform:translateX(105%); transition:transform .35s cubic-bezier(.2,.8,.2,1);
  display:flex; flex-direction:column; box-shadow:-20px 0 60px rgba(0,0,0,.5); }
.panel.open{ transform:none; }
.panel-head{ display:flex; align-items:center; justify-content:space-between; padding:18px;
  border-bottom:1px solid var(--glass-brd); font-weight:700; letter-spacing:1px; }
.panel-head > div{ display:flex; gap:8px; }
.mini{ font-family:var(--font-ui); font-size:12px; color:var(--txt-dim); cursor:pointer;
  background:var(--glass); border:1px solid var(--glass-brd); border-radius:9px; padding:6px 10px; transition:.18s; }
.mini:hover{ color:var(--txt); border-color:var(--accent); }
.panel-body{ flex:1; overflow-y:auto; padding:10px; }
.hist-item{ padding:12px 14px; border-radius:14px; margin-bottom:8px; cursor:pointer;
  background:var(--glass); border:1px solid var(--glass-brd); transition:.18s; }
.hist-item:hover{ border-color:var(--accent); transform:translateX(-3px); }
.hist-expr{ font-family:var(--font-mono); font-size:12px; color:var(--txt-dim); word-break:break-all; }
.hist-res{ font-family:var(--font-num); font-size:20px; margin-top:3px;
  background:linear-gradient(90deg,var(--txt),var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hist-empty{ text-align:center; color:var(--txt-dim); font-size:13px; padding:40px 10px; opacity:.7; }

/* ============================================================
   Модалка
   ============================================================ */
.modal{ position:fixed; inset:0; z-index:30; display:none; place-items:center; padding:20px;
  background:rgba(0,0,0,.55); backdrop-filter:blur(6px); }
.modal.open{ display:grid; animation:fade .25s; }
@keyframes fade{ from{ opacity:0; } to{ opacity:1; } }
.modal-card{ width:min(640px,96vw); max-height:86vh; overflow:hidden; border-radius:24px;
  background:linear-gradient(180deg, rgba(28,22,54,.96), rgba(12,9,24,.98));
  border:1px solid var(--glass-brd); box-shadow:0 40px 100px rgba(0,0,0,.6);
  display:flex; flex-direction:column; animation:rise .4s; }
.modal-head{ display:flex; align-items:center; justify-content:space-between; padding:20px 22px;
  border-bottom:1px solid var(--glass-brd); }
.modal-head h2{ font-family:var(--font-num); font-size:20px; font-weight:700; letter-spacing:1px; }
.modal-head h2 span{ color:var(--accent-2); }
.modal-body{ padding:18px 22px; overflow-y:auto; }
.info-group{ margin-bottom:20px; }
.info-group h3{ font-size:13px; text-transform:uppercase; letter-spacing:1.5px; color:var(--accent-2); margin-bottom:10px; }
.info-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:8px; }
.info-item{ font-size:13px; color:var(--txt-dim); padding:9px 12px; border-radius:11px;
  background:var(--glass); border:1px solid var(--glass-brd); display:flex; justify-content:space-between; gap:8px; }
.info-item b{ color:var(--txt); font-family:var(--font-mono); font-weight:500; }

/* ============================================================
   Toast
   ============================================================ */
.toast{ position:fixed; bottom:28px; left:50%; transform:translateX(-50%) translateY(24px);
  padding:12px 20px; border-radius:14px; z-index:40; opacity:0; pointer-events:none;
  font-weight:600; font-size:14px; color:#0a0a12;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 12px 30px -6px var(--accent); transition:.3s cubic-bezier(.2,.8,.2,1); }
.toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }

/* ============================================================
   Адаптив
   ============================================================ */
@media (max-width:640px){
  .calc{ padding:16px; }
  .pads{ grid-template-columns:1fr; gap:10px; }
  .pad-sci{ order:2; }
  .pad-num{ order:1; }
  .key{ height:52px; font-size:17px; }
  .key.fn{ font-size:13px; }
}
@media (max-width:380px){
  .key{ height:46px; }
}