@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  color-scheme: dark;
  --bg: #070b16;
  --panel: #0e1424;
  --panel-2: #131b2e;
  --line: rgba(196, 210, 236, 0.14);
  --text: #f4f7ff;
  --muted: #929db4;
  --lime: #d9ff5b;
  --cyan: #5de2ff;
  --peach: #ff9f7a;
  --violet: #a98bff;
  --danger: #ff7489;
}

* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  font-family: "DM Sans", sans-serif;
  background:
    radial-gradient(circle at 9% 8%, rgba(93, 226, 255, 0.08), transparent 25rem),
    radial-gradient(circle at 89% 88%, rgba(169, 139, 255, 0.09), transparent 28rem),
    var(--bg);
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }

.budget-header {
  min-height: 74px;
  padding: 0 clamp(1.25rem, 4vw, 4.5rem);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.budget-brand, .back-link { text-decoration: none; display: inline-flex; align-items: center; }
.budget-brand { gap: .7rem; font: 800 .95rem/1 "Manrope", sans-serif; letter-spacing: .14em; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--lime); border-radius: 10px; color: var(--lime); }
.back-link { gap: .55rem; color: var(--muted); font-size: .9rem; transition: color .2s ease; }
.back-link:hover { color: var(--text); }
.back-link svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.calculator-shell { width: min(1380px, calc(100% - 2rem)); margin: 0 auto; padding: clamp(2.5rem, 6vw, 5.5rem) 0 4rem; }
.calculator-intro { max-width: 780px; margin-bottom: 2.3rem; }
.eyebrow { margin: 0 0 .8rem; color: var(--lime); font: 700 .75rem/1 "Manrope", sans-serif; letter-spacing: .16em; }
.calculator-intro h1 { margin: 0; font: 700 clamp(2.6rem, 6.2vw, 5.7rem)/.98 "Manrope", sans-serif; letter-spacing: -.065em; }
.calculator-intro h1 span { color: var(--muted); }
.calculator-intro > p:last-child { max-width: 590px; margin: 1.15rem 0 0; color: var(--muted); font-size: 1rem; line-height: 1.65; }

.calculator-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr); gap: 1rem; align-items: start; }
.input-panel, .results-panel { border: 1px solid var(--line); border-radius: 24px; background: rgba(14, 20, 36, .9); box-shadow: 0 22px 70px rgba(0, 0, 0, .26); }
.input-panel { padding: clamp(1.15rem, 3vw, 2rem); }
.income-block { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-bottom: 1.4rem; border-bottom: 1px solid var(--line); }
.income-block label { font: 600 1rem/1.3 "Manrope", sans-serif; }
.money-input { display: flex; align-items: center; min-width: 140px; padding: .35rem .75rem; border: 1px solid var(--line); border-radius: 12px; background: #090e1c; transition: border-color .2s ease, box-shadow .2s ease; }
.money-input:focus-within { border-color: rgba(217, 255, 91, .72); box-shadow: 0 0 0 3px rgba(217, 255, 91, .08); }
.money-input span { color: var(--muted); }
.money-input input { width: 100%; min-width: 0; padding: .45rem; border: 0; outline: 0; color: var(--text); background: transparent; text-align: right; font: 700 1rem/1 "Manrope", sans-serif; }
.income-input { min-width: min(220px, 48%); }
.income-input input { font-size: 1.2rem; }

.category-list { display: grid; gap: .8rem; padding: 1.2rem 0; }
.category-card { --category: var(--lime); padding: 1rem; border: 1px solid var(--line); border-radius: 17px; display: grid; grid-template-columns: minmax(0, 1fr) 150px; gap: 1rem; align-items: center; background: rgba(19, 27, 46, .72); }
.category-card.investments { --category: var(--cyan); }
.category-card.spending { --category: var(--peach); }
.category-card.essentials { --category: var(--violet); }
.category-heading { display: grid; grid-template-columns: 42px minmax(0, 1fr) auto; align-items: center; gap: .75rem; }
.category-icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; color: var(--category); background: color-mix(in srgb, var(--category) 11%, transparent); }
.category-icon svg { width: 21px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.category-heading h2, .category-heading p { margin: 0; }
.category-heading h2 { font: 700 .98rem/1.25 "Manrope", sans-serif; }
.category-heading p { margin-top: .2rem; color: var(--muted); font-size: .78rem; }
.percent-control { display: flex; align-items: center; gap: .1rem; min-width: 68px; padding: .4rem .45rem; border: 1px solid color-mix(in srgb, var(--category) 32%, transparent); border-radius: 9px; color: var(--category); background: color-mix(in srgb, var(--category) 8%, transparent); font: 700 .78rem/1 "Manrope", sans-serif; }
.percent-control:focus-within { border-color: var(--category); box-shadow: 0 0 0 3px color-mix(in srgb, var(--category) 10%, transparent); }
.percent-control input { width: 42px; min-width: 0; padding: 0; border: 0; outline: 0; color: inherit; background: transparent; text-align: right; font: inherit; }
.percent-control span:last-child { pointer-events: none; }

.input-actions { display: flex; align-items: center; gap: .8rem; }
button { cursor: pointer; }
.primary-button { min-height: 46px; padding: 0 1.1rem; border: 0; border-radius: 12px; color: #0b101d; background: var(--lime); font-weight: 700; }
.primary-button:hover { background: #e5ff88; }
.text-button { min-height: 44px; padding: 0 1rem; border: 0; color: var(--muted); background: transparent; }
.text-button:hover { color: var(--text); }

.results-panel { position: sticky; top: 1rem; padding: clamp(1.2rem, 3vw, 2rem); overflow: hidden; }
.results-panel::before { position: absolute; inset: 0 0 auto; height: 2px; content: ""; background: linear-gradient(90deg, var(--lime), var(--cyan), var(--peach), var(--violet)); }
.result-heading { display: flex; justify-content: space-between; gap: 1rem; align-items: start; }
.result-heading h2 { margin: 0; font: 700 1.45rem/1.2 "Manrope", sans-serif; letter-spacing: -.035em; }
.status-pill { padding: .45rem .7rem; border-radius: 999px; color: var(--lime); background: rgba(217, 255, 91, .1); font-size: .72rem; font-weight: 700; white-space: nowrap; }
.status-pill.over { color: var(--danger); background: rgba(255, 116, 137, .1); }
.status-pill.under { color: var(--cyan); background: rgba(93, 226, 255, .1); }

.chart-wrap { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 1.5rem; align-items: center; padding: 2rem 0; }
.donut { width: 190px; aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--lime) 0 25%, var(--cyan) 25% 40%, var(--peach) 40% 60%, var(--violet) 60% 100%); box-shadow: 0 0 50px rgba(93, 226, 255, .08); }
.donut::after { grid-area: 1/1; width: 66%; aspect-ratio: 1; border-radius: 50%; content: ""; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); }
.donut-center { z-index: 1; grid-area: 1/1; display: grid; text-align: center; }
.donut-center span { color: var(--muted); font-size: .75rem; }
.donut-center strong { margin-top: .1rem; font: 700 1.65rem/1 "Manrope", sans-serif; }
.chart-legend { margin: 0; padding: 0; list-style: none; display: grid; gap: .8rem; }
.chart-legend li { display: grid; grid-template-columns: 9px minmax(0, 1fr) auto; align-items: center; gap: .6rem; color: var(--muted); font-size: .78rem; }
.chart-legend strong { color: var(--text); font: 600 .82rem/1 "Manrope", sans-serif; }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.savings-dot { background: var(--lime); }.investments-dot { background: var(--cyan); }.spending-dot { background: var(--peach); }.essentials-dot { background: var(--violet); }

.remaining-card { padding: 1.05rem 1.15rem; border: 1px solid rgba(93, 226, 255, .2); border-radius: 16px; display: flex; align-items: center; justify-content: space-between; background: rgba(93, 226, 255, .06); }
.remaining-card span { color: var(--muted); font-size: .82rem; }
.remaining-card strong { font: 700 1.3rem/1 "Manrope", sans-serif; }
.remaining-card.over { border-color: rgba(255, 116, 137, .28); background: rgba(255, 116, 137, .07); }
.remaining-card.over strong { color: var(--danger); }
.projection-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; margin-top: .8rem; }
.projection-grid div { padding: 1rem; border: 1px solid var(--line); border-radius: 14px; background: rgba(19, 27, 46, .6); }
.projection-grid span, .projection-grid strong { display: block; }
.projection-grid span { color: var(--muted); font-size: .72rem; }
.projection-grid strong { margin-top: .4rem; font: 700 1rem/1 "Manrope", sans-serif; }
.result-note { margin: 1rem 0 0; color: var(--muted); font-size: .7rem; line-height: 1.5; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-width: 960px) {
  .calculator-grid { grid-template-columns: 1fr; }
  .results-panel { position: static; }
}
@media (max-width: 620px) {
  .budget-header { min-height: 66px; }
  .back-link { font-size: 0; }
  .back-link svg { width: 22px; }
  .calculator-shell { width: min(100% - 1rem, 1380px); padding-top: 2.2rem; }
  .calculator-intro h1 { font-size: clamp(2.4rem, 13vw, 4rem); }
  .income-block { align-items: stretch; flex-direction: column; }
  .income-input { width: 100%; max-width: none; }
  .category-card { grid-template-columns: 1fr; }
  .category-card > .money-input { width: 100%; }
  .category-heading { grid-template-columns: 42px minmax(0, 1fr) auto; }
  .chart-wrap { grid-template-columns: 1fr; justify-items: center; }
  .chart-legend { width: 100%; }
  .projection-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }