:root {
  --bg: #f1eadb;
  --paper: #fbf5e8;
  --paper-soft: #f5ecd9;
  --ink: #30281f;
  --muted: #736552;
  --line: #d6c5a6;
  --line-strong: #bda37a;
  --blue: #365f63;
  --blue-dark: #234347;
  --green: #48664c;
  --gold: #9f7335;
  --wine: #7b4147;
  --radius: 6px;
  --shadow: 0 1px 0 rgba(15, 23, 42, 0.04), 0 14px 30px rgba(15, 23, 42, 0.08);
  --wrap: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(255,255,255,.18), rgba(255,255,255,.18)),
    radial-gradient(circle at top left, rgba(110, 82, 45, .14), transparent 28%),
    var(--bg);
  font: 16px/1.55 Arial, Helvetica, sans-serif;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
.wrap { width: min(calc(100% - 28px), var(--wrap)); margin: 0 auto; }
.top-strip { min-height: 34px; color: #f4e7cc; background: #3a3023; }
.top-strip .wrap,
.site-head .wrap,
.site-footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.top-strip small { padding: 7px 0; }
.site-head {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { min-height: 86px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 1.45rem; }
.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 2px solid var(--blue);
  border-radius: 50%;
  color: var(--blue);
  font-size: 1.35rem;
  background: #efe1c4;
}
.main-nav { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-weight: 700; }
.head-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}
.head-search input {
  width: min(330px, 48vw);
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0 17px;
  background: #fff;
}
.language-chip {
  display: grid;
  min-width: 42px;
  min-height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--blue-dark);
  background: #f1e4ca;
  font-weight: 700;
}
.main-nav a,
.pill-link {
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 10px 12px;
}
.main-nav a:hover,
.pill-link:hover { color: var(--blue-dark); border-color: var(--line); background: var(--paper-soft); }
.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(250px, 1fr);
  align-items: start;
  gap: 22px;
  padding: 26px 0 34px;
}
.panel,
.tool-link,
.article-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}
.panel-head {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #f5f8fb);
}
.panel-head h1,
.panel-head h2,
.tool-page h1 { margin: 0; line-height: 1.2; letter-spacing: 0; }
.panel-head p,
.tool-page-intro,
.fine-print { margin: 8px 0 0; color: var(--muted); }
.calculator-shell { padding: 20px; }
.calculator-display {
  min-height: 112px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #ece1c8;
  text-align: right;
}
.expression {
  min-height: 28px;
  color: var(--muted);
  overflow-wrap: anywhere;
}
.answer {
  min-height: 52px;
  font-size: clamp(2rem, 5vw, 3.3rem);
  font-weight: 700;
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.keypad {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}
.keypad button {
  min-height: 64px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink);
  background: #fff9ed;
  font-size: 1.2rem;
  font-weight: 700;
}
.keypad button:hover,
.keypad button:focus-visible { outline: 0; background: #efe0bf; border-color: var(--blue); }
.keypad .operator { color: var(--blue-dark); background: #e5dbc4; }
.keypad .danger { color: #6d3037; background: #f1ddd9; }
.keypad .equals { color: #fff; background: var(--blue); border-color: var(--blue); grid-row: span 2; }
.keypad .equals:hover { background: var(--blue-dark); }
.keyboard-note {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.94rem;
}
.portal-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 9px;
  padding: 20px 0 24px;
}
.portal-pill,
.menu-link {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 11px 15px;
  color: var(--blue-dark);
  background: #fff7e8;
  box-shadow: 0 7px 18px rgba(15, 23, 42, .06);
  font-weight: 700;
}
.portal-pill:hover,
.menu-link:hover {
  border-color: var(--blue);
  transform: translateY(-1px);
}
.math { --accent: #365f63; }
.finance { --accent: #8a6531; }
.health { --accent: #48664c; }
.date { --accent: #665073; }
.convert { --accent: #7b4147; }
.portal-pill::before,
.menu-link::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 9px;
  border-radius: 999px;
  background: var(--accent);
}
.welcome-band,
.site-menu {
  border-top: 1px solid #786348;
  border-bottom: 1px solid #786348;
  background:
    linear-gradient(135deg, rgba(75, 95, 72, .96), rgba(95, 72, 55, .92)),
    repeating-linear-gradient(45deg, rgba(255,244,215,.12) 0 2px, transparent 2px 10px);
}
.welcome-copy {
  display: flex;
  justify-content: center;
  padding: 18px 0;
}
.welcome-copy p {
  width: min(900px, 100%);
  margin: 0;
  border: 1px solid rgba(255,237,198,.23);
  padding: 18px 24px;
  color: #fbefd5;
  background: rgba(45, 34, 24, .34);
  text-align: center;
  font-size: 1.06rem;
  font-weight: 700;
}
.calculator-stage {
  display: flex;
  justify-content: center;
  min-height: 590px;
  padding: 34px 0 42px;
}
.portal-calculator {
  width: min(430px, 100%);
  text-align: center;
}
.calculator-title {
  margin-bottom: 15px;
}
.calculator-title h1 {
  margin: 0;
  font-size: 1.5rem;
}
.calculator-title p {
  margin: 6px 0 0;
  color: var(--muted);
}
.centered-shell {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 15px;
  background: var(--paper);
  box-shadow: 0 18px 48px rgba(15, 23, 42, .11);
}
.centered-shell .calculator-display {
  min-height: 92px;
}
.centered-shell .keypad button {
  min-height: 56px;
}
.site-menu {
  padding: 28px 0 34px;
}
.site-menu h2,
.featured-block h2,
.conversion-block h2,
.portal-copy h2 {
  margin: 0 0 15px;
  font-size: 1.35rem;
}
.site-menu h2 {
  color: #fff;
  text-align: center;
}
.menu-cloud {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}
.menu-link {
  border-radius: var(--radius);
  color: #163b64;
}
.portal-lower {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 28px;
  padding: 36px 0;
}
.featured-block,
.conversion-block,
.portal-copy {
  border-top: 3px solid var(--blue);
  padding-top: 15px;
}
.feature-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.feature-list a {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: #fff7e9;
  box-shadow: var(--shadow);
}
.feature-list strong,
.feature-list span {
  display: block;
}
.feature-list strong {
  color: var(--blue-dark);
  font-size: 1.05rem;
}
.feature-list span,
.conversion-block p,
.portal-copy p {
  margin-top: 6px;
  color: var(--muted);
}
.conversion-links {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 16px;
}
.conversion-links a,
.conversion-links span {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: #fff7e9;
}
.conversion-links a {
  color: var(--blue-dark);
  font-weight: 700;
}
.conversion-links span {
  color: var(--muted);
}
.portal-note {
  display: grid;
  grid-template-columns: minmax(300px, .8fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding-bottom: 42px;
}
.sidebar { display: grid; gap: 18px; }
.sidebar-block { padding: 16px; }
.sidebar-block h2,
.category h2,
.article-box h2 { margin: 0 0 12px; font-size: 1.18rem; }
.search-field,
.field {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0 13px;
  background: #fff;
}
.link-list { display: grid; gap: 8px; }
.link-list a {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px dashed var(--line);
  padding: 8px 2px;
  color: var(--blue-dark);
}
.link-list a:last-child { border-bottom: 0; }
.ad-slot {
  display: grid;
  place-items: center;
  min-height: 108px;
  border: 1px dashed #caa04d;
  border-radius: var(--radius);
  color: #6f4f24;
  background: #f6e7c8;
  text-align: center;
}
.catalog {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding-bottom: 34px;
}
.category { padding: 18px; }
.tool-links { display: grid; gap: 10px; }
.tool-link {
  display: block;
  padding: 14px;
  box-shadow: none;
  transition: border-color .18s ease, transform .18s ease;
}
.tool-link:hover { transform: translateY(-1px); border-color: var(--blue); }
.tool-link strong { display: block; color: var(--blue-dark); }
.tool-link span { display: block; margin-top: 4px; color: var(--muted); font-size: .94rem; }
.article-box { padding: 20px; margin-bottom: 34px; }
.article-box p,
.article-box li { color: var(--muted); }
.tool-page {
  padding: 26px 0 38px;
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(250px, 1fr);
  gap: 22px;
  align-items: start;
}
.tool-card { padding: 20px; }
.tool-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.tool-form label { display: grid; gap: 7px; color: var(--muted); font-weight: 700; }
.tool-form .full { grid-column: 1 / -1; }
.form-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.button {
  min-height: 48px;
  border: 1px solid var(--blue);
  border-radius: var(--radius);
  padding: 0 16px;
  color: #fff;
  background: var(--blue);
  font-weight: 700;
}
.button.secondary { color: var(--blue-dark); background: #eef5ff; }
.result-box {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
  padding: 16px;
  background: #f1ead7;
}
.result-box strong { display: block; font-size: 1.7rem; line-height: 1.25; }
.message { min-height: 24px; color: #952c39; }
.formula {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--paper-soft);
  color: var(--blue-dark);
  font-weight: 700;
}
.site-footer {
  color: #f4e7cc;
  background: #3a3023;
}
.site-footer .wrap { min-height: 88px; }
.site-footer p { margin: 4px 0; }

@media (max-width: 920px) {
  .site-head .wrap,
  .top-strip .wrap,
  .site-footer .wrap { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .page-grid,
  .tool-page,
  .catalog,
  .portal-lower,
  .portal-note { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .wrap { width: min(calc(100% - 18px), var(--wrap)); }
  .top-strip .wrap {
    display: block;
    padding: 9px 0;
  }
  .top-strip small:last-child { display: none; }
  .site-head .wrap { min-height: auto; }
  .brand { font-size: 1.2rem; }
  .brand-mark { width: 42px; height: 42px; }
  .head-tools { width: 100%; }
  .head-search { flex: 1; }
  .head-search .sr-only { display: none; }
  .head-search input { width: 100%; }
  .portal-nav { justify-content: flex-start; padding-top: 15px; }
  .portal-pill { padding: 9px 12px; font-size: .94rem; }
  .welcome-copy p { padding: 15px; font-size: 1rem; text-align: left; }
  .calculator-stage { min-height: 0; padding: 28px 0 40px; }
  .calculator-shell,
  .tool-card,
  .article-box { padding: 14px; }
  .keypad button { min-height: 58px; }
  .tool-form { grid-template-columns: 1fr; }
}