/* ==========================================================================
   Калькулятор налогов РФ 2026
   Минималистичный UI в стиле банковских сервисов.
   ========================================================================== */

:root{
  --bg: #f6f8fc;
  --card: #ffffff;
  --muted: rgba(15, 23, 42, .65);
  --text: #0f172a;
  --border: rgba(2, 6, 23, .10);
  --shadow: 0 10px 30px rgba(2, 6, 23, .08);
  --shadow2: 0 8px 18px rgba(2, 6, 23, .06);
  --primary: #2563eb;
  --primary2: #4f46e5;
  --good: #16a34a;
  --bad: #ef4444;
  --focus: rgba(37, 99, 235, .22);
  --radius: 18px;
  --radius-sm: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

html,body{height:100%;}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background:
    radial-gradient(900px 520px at 15% 0%, rgba(37,99,235,.12), transparent 60%),
    radial-gradient(900px 520px at 85% 10%, rgba(79,70,229,.10), transparent 55%),
    var(--bg);
  color:var(--text);
}

/* Dark theme */
html[data-theme="dark"]{
  --bg: #0b1220;
  --card: rgba(255,255,255,.06);
  --muted: rgba(226,232,240,.72);
  --text: #e2e8f0;
  --border: rgba(226,232,240,.14);
  --shadow: 0 18px 44px rgba(0,0,0,.45);
  --shadow2: 0 14px 28px rgba(0,0,0,.35);
  --focus: rgba(99,102,241,.28);
}

.app{min-height:100%; display:flex; flex-direction:column;}

.topbar{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  gap:14px;
  padding:14px 18px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(246, 248, 252, .75);
  border-bottom: 1px solid var(--border);
}
html[data-theme="dark"] .topbar{ background: rgba(11, 18, 32, .68); }

.brand{display:flex; align-items:center; gap:12px; min-width: 220px;}
.logo{
  width:40px;height:40px;border-radius:14px;
  display:grid;place-items:center;
  color:#fff;font-weight:900;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  box-shadow: var(--shadow2);
}
.brand-title{font-weight:850; letter-spacing:-.2px;}
.brand-sub{font-size:12px; color:var(--muted); margin-top:2px;}

.top-actions{display:flex; align-items:center; gap:10px; flex-wrap:wrap;}
.chip{
  display:inline-flex; align-items:center; gap:8px;
  height:38px; padding:0 14px;
  border-radius:999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.68);
  color: var(--text);
  font-weight:700; cursor:pointer;
  box-shadow: 0 2px 10px rgba(2,6,23,.04);
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
html[data-theme="dark"] .chip{ background: rgba(255,255,255,.07); box-shadow:none; }
.chip:hover{ transform: translateY(-1px); border-color: rgba(37,99,235,.35); }
.chip:active{ transform: translateY(0); }
.chip-primary{
  border-color: rgba(37,99,235,.35);
  background: linear-gradient(135deg, rgba(37,99,235,.95), rgba(79,70,229,.92));
  color:#fff;
}
.chip-ico{font-size:14px;}

.main{max-width: 1120px; margin: 0 auto; padding: 18px 18px 38px;}

.summary{display:grid; grid-template-columns: 1.3fr .9fr; gap:14px; margin: 14px 0 16px;}
@media (max-width: 860px){ .summary{grid-template-columns:1fr; } }

.sum-card{
  background: var(--card);
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 16px 14px;
}
.sum-label{font-size:12px; color:var(--muted); font-weight:800; text-transform:uppercase; letter-spacing:.08em;}
.sum-value{font-size: 34px; font-weight: 900; letter-spacing: -.8px; margin-top:6px;}
.sum-hint{font-size: 12px; color: var(--muted); line-height: 1.4; margin-top: 8px;}

.sum-grid{display:grid; grid-template-columns: repeat(3, 1fr); gap: 10px;}
@media (max-width: 520px){ .sum-grid{grid-template-columns:1fr; } }
.mini{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow2);
  padding: 12px 12px 10px;
}
.mini-label{font-size:12px; color:var(--muted); font-weight:800;}
.mini-value{font-family: var(--mono); font-weight:900; margin-top: 4px; font-size: 16px;}

.tabs{
  display:flex; gap:8px; flex-wrap:wrap;
  margin: 16px 0 14px;
}
.tab{
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 800;
  cursor:pointer;
  color: var(--muted);
  transition: background .12s ease, border-color .12s ease, color .12s ease;
}
.tab.is-active{
  color: #fff;
  border-color: rgba(37,99,235,.35);
  background: linear-gradient(135deg, rgba(37,99,235,.95), rgba(79,70,229,.92));
}

.panel{display:none;}
.panel.is-active{display:block;}

.grid{display:grid; grid-template-columns: 1.2fr .8fr; gap:14px;}
@media (max-width: 980px){ .grid{grid-template-columns: 1fr; } }

.card{
  background: var(--card);
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}
.card-side{position:sticky; top:78px; height:fit-content;}
@media (max-width: 980px){ .card-side{position:static;} }

.card-head h2{margin:0; font-size: 18px; letter-spacing: -.2px;}
.muted{margin:8px 0 0; color: var(--muted); line-height: 1.45; font-size: 13px;}

.form{margin-top: 14px; display:flex; flex-direction:column; gap: 12px;}
.row{display:grid; grid-template-columns: 1fr 1fr; gap: 12px;}
@media (max-width: 720px){ .row{grid-template-columns:1fr;} }

.field{display:flex; flex-direction:column; gap: 6px;}
.label{font-size: 12px; font-weight: 800; color: var(--muted); display:flex; align-items:center; gap: 8px;}

input,select{
  height: 42px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(255,255,255,.78);
  color: var(--text);
  outline: none;
  font-weight: 700;
}
html[data-theme="dark"] input, html[data-theme="dark"] select{ background: rgba(255,255,255,.06); }
input:focus, select:focus{ box-shadow: 0 0 0 4px var(--focus); border-color: rgba(37,99,235,.40); }

.error{min-height: 16px; font-size: 12px; color: var(--bad); font-weight: 700;}

.note{
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  color: var(--muted);
  background: rgba(255,255,255,.55);
  font-size: 12px;
  line-height: 1.45;
}
html[data-theme="dark"] .note{ background: rgba(255,255,255,.05); }

.divider{height:1px; background: var(--border); margin: 14px 0;}

.kpi-label{font-size: 12px; font-weight: 900; text-transform:uppercase; letter-spacing:.08em; color: var(--muted);}
.kpi-value{font-size: 28px; font-weight: 950; letter-spacing: -.6px; margin-top: 6px;}
.kpi-meta{margin-top: 8px; color: var(--muted); font-size: 12px; line-height: 1.4;}

.explain{font-size: 12px; line-height: 1.5; color: var(--muted);}
.explain code{font-family: var(--mono); font-weight: 700; color: var(--text);}

/* Tooltip */
.tip{
  display:inline-grid; place-items:center;
  width:16px; height:16px;
  border-radius:50%;
  font-weight: 900;
  font-size: 11px;
  border:1px solid var(--border);
  color: var(--muted);
  background: rgba(255,255,255,.65);
  cursor: help;
  position: relative;
}
html[data-theme="dark"] .tip{ background: rgba(255,255,255,.07); }
.tip::after{
  content: attr(data-tip);
  position:absolute;
  left:50%;
  transform: translateX(-50%);
  bottom: calc(100% + 10px);
  width: min(260px, 70vw);
  padding: 10px 10px;
  border-radius: 12px;
  background: rgba(15,23,42,.96);
  color: #fff;
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 18px 45px rgba(0,0,0,.35);
  font-size: 12px;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  transition: opacity .12s ease;
  z-index: 999;
}
.tip:hover::after{opacity:1;}

/* Switch */
.field-switch .switch{display:flex; gap:10px; align-items:center;}
.switch input{display:none;}
.slider{
  width: 46px; height: 28px;
  border-radius: 999px;
  background: rgba(2,6,23,.16);
  border: 1px solid var(--border);
  position: relative;
  transition: background .12s ease;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
}
.slider::after{
  content:"";
  position:absolute; top:3px; left:3px;
  width: 22px; height: 22px;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(0,0,0,.18);
  transition: transform .12s ease;
}
html[data-theme="dark"] .slider::after{ background: rgba(255,255,255,.92); }
.switch input:checked + .slider{ background: rgba(37,99,235,.42); }
.switch input:checked + .slider::after{ transform: translateX(18px); }
.switch-text{font-size: 12px; font-weight: 800; color: var(--muted);}

.footer{margin-top: 18px; padding: 8px 2px;}
.foot-note{font-size: 12px; color: var(--muted); line-height: 1.45;}