:root {
  --bg: #0b1020;
  --bg-2: #121a33;
  --card: #161f3d;
  --card-2: #1c2647;
  --text: #e8ecf7;
  --muted: #9aa6c4;
  --border: #263155;
  --primary: #6d5efc;
  --primary-2: #8b7bff;
  --income: #34d399;
  --expense: #fb7185;
  --accent: #38bdf8;
  --radius: 16px;
  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 80% -10%, #1b2450 0%, transparent 60%), var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* HEADER */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(11,16,32,.72);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--text); letter-spacing: -.02em; }
.logo span { color: var(--primary-2); }
.nav a { color: var(--muted); text-decoration: none; margin-left: 22px; font-size: .95rem; transition: color .2s; }
.nav a:hover { color: var(--text); }

/* HERO */
.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.1; }
.grad { background: linear-gradient(90deg, var(--primary-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .sub { max-width: 620px; margin: 18px auto 28px; color: var(--muted); font-size: 1.1rem; }

.btn { display: inline-block; padding: 14px 26px; border-radius: 999px; font-weight: 600; text-decoration: none; cursor: pointer; border: none; font-size: 1rem; transition: transform .15s, box-shadow .2s; }
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--primary-2)); color: #fff; box-shadow: 0 10px 30px rgba(109,94,252,.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(109,94,252,.55); }

/* ADS */
.ad-wrap { margin: 28px auto; min-height: 90px; display: flex; align-items: center; justify-content: center; }
.ad-wrap ins { width: 100%; }

/* CALCULATOR */
.calc-section { padding: 20px 0 40px; }
.calc-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; align-items: start; }
.card { background: linear-gradient(180deg, var(--card), var(--card-2)); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.card-head h2 { font-size: 1.3rem; }

select, input {
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 12px; font-size: .95rem; font-family: var(--font); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
select:focus, input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(109,94,252,.25); }

.group-title { margin: 22px 0 12px; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.group-title::before { content: ""; width: 8px; height: 8px; border-radius: 50%; }
.group-title.income::before { background: var(--income); }
.group-title.expense::before { background: var(--expense); }

.rows { display: flex; flex-direction: column; gap: 10px; }
.row { display: grid; grid-template-columns: 1fr 120px 36px; gap: 8px; align-items: center; }
.row input.amount { text-align: right; }
.row .del { display: flex; align-items: center; justify-content: center; background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 8px; height: 38px; cursor: pointer; transition: all .2s; }
.row .del:hover { border-color: var(--expense); color: var(--expense); }

.btn-add { margin-top: 12px; background: transparent; border: 1px dashed var(--border); color: var(--primary-2); border-radius: 10px; padding: 10px; width: 100%; cursor: pointer; font-weight: 600; font-size: .9rem; transition: all .2s; }
.btn-add:hover { border-color: var(--primary); background: rgba(109,94,252,.08); }
.btn-reset { margin-top: 22px; background: transparent; border: none; color: var(--muted); cursor: pointer; font-size: .85rem; text-decoration: underline; }
.btn-reset:hover { color: var(--expense); }

/* RESULTS */
.results-card { position: sticky; top: 84px; }
.summary { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.summary-item { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.summary-item.highlight { grid-column: 1 / -1; background: linear-gradient(90deg, rgba(109,94,252,.18), rgba(56,189,248,.12)); }
.summary-item .label { display: block; font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.summary-item .value { font-size: 1.5rem; font-weight: 800; letter-spacing: -.02em; }
.value.income { color: var(--income); }
.value.expense { color: var(--expense); }

.chart-wrap { position: relative; display: flex; justify-content: center; margin: 26px 0 10px; }
#donut { transform: rotate(-90deg); }
.donut-track { fill: none; stroke: var(--bg-2); stroke-width: 12; }
.donut-fill { fill: none; stroke: url(#g); stroke: var(--primary-2); stroke-width: 12; stroke-linecap: round; stroke-dasharray: 326.7; stroke-dashoffset: 326.7; transition: stroke-dashoffset .6s ease, stroke .3s; }
.chart-center { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); text-align: center; }
.chart-center span { font-size: 1.8rem; font-weight: 800; display: block; }
.chart-center small { color: var(--muted); font-size: .72rem; }

.status { text-align: center; padding: 12px; border-radius: 10px; font-weight: 600; margin: 10px 0; font-size: .95rem; }
.status.good { background: rgba(52,211,153,.14); color: var(--income); }
.status.warn { background: rgba(251,191,36,.14); color: #fbbf24; }
.status.bad { background: rgba(251,113,133,.14); color: var(--expense); }

.rule { margin-top: 22px; border-top: 1px solid var(--border); padding-top: 18px; }
.rule h4 { font-size: 1rem; }
.rule-hint { color: var(--muted); font-size: .82rem; margin-bottom: 12px; }
.rule-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: .95rem; }
.rule-row:last-child { border-bottom: none; }
.rule-row span:last-child { font-weight: 700; }

/* INFO SECTIONS */
.info { padding: 56px 0; }
.info h2 { text-align: center; font-size: 1.8rem; margin-bottom: 32px; letter-spacing: -.02em; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.step .num { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; border-radius: 50%; background: linear-gradient(90deg, var(--primary), var(--primary-2)); font-weight: 700; margin-bottom: 12px; }
.step h3 { font-size: 1.1rem; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: .95rem; }

.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; margin-bottom: 12px; max-width: 720px; margin-left: auto; margin-right: auto; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--muted); margin-top: 10px; }

/* PROSE (about / privacy) */
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: -.02em; margin-bottom: 10px; }
.prose h2 { font-size: 1.25rem; margin: 30px 0 10px; text-align: left; }
.prose p, .prose li { color: #c3cce6; margin-bottom: 12px; }
.prose ul { padding-left: 22px; margin-bottom: 12px; }
.prose li { margin-bottom: 8px; }
.prose a { color: var(--primary-2); }
.prose .muted { color: var(--muted); font-size: .9rem; }
.prose strong { color: var(--text); }
.site-footer a { color: var(--muted); text-decoration: underline; }
.site-footer a:hover { color: var(--text); }

/* FOOTER */
.site-footer { border-top: 1px solid var(--border); padding: 30px 0; text-align: center; color: var(--muted); font-size: .9rem; }
.site-footer .disclaimer { font-size: .8rem; opacity: .8; margin-top: 6px; }

/* RESPONSIVE */
@media (max-width: 860px) {
  .calc-grid { grid-template-columns: 1fr; }
  .results-card { position: static; }
  .steps { grid-template-columns: 1fr; }
  .nav { display: none; }
}