:root {
  color-scheme: light;
  --bg: #f4f2ee;
  --surface: #ffffff;
  --surface-strong: #f7f5f0;
  --text: #1f252c;
  --muted: #66727f;
  --line: #ded8ce;
  --brand: #315f72;
  --brand-dark: #244757;
  --accent: #9b5f2a;
  --warn: #946314;
  --danger: #b42318;
  --code: #111827;
  --shadow: 0 12px 30px rgba(23, 32, 42, 0.08);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: #243844;
  color: #fff;
  font-size: 18px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  color: var(--muted);
}

.language-control {
  margin: 0;
}

.language-control select {
  min-height: 34px;
  width: auto;
  border-color: var(--line);
  background: #fff;
  color: var(--text);
  font-size: 14px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: 560px;
  padding: 64px 0 38px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(246, 244, 239, 0.98) 0%, rgba(246, 244, 239, 0.88) 42%, rgba(246, 244, 239, 0.18) 74%),
    url("/assets/img/hero-planning-desk.png") center / cover no-repeat;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.8fr);
  gap: 32px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  font-size: 48px;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 18px;
}

.lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  padding: 20px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--surface);
}

.stat strong {
  display: block;
  font-size: 21px;
}

.stat span {
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 34px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.section-head p {
  max-width: 620px;
  margin: 8px 0 0;
  color: var(--muted);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.category-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 18px;
}

.category-panel h3 {
  margin-bottom: 12px;
}

.category-panel .footer-links {
  gap: 10px;
}

.tool-card {
  display: flex;
  min-height: 158px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 18px;
  color: var(--text);
}

.tool-card.featured {
  border-color: rgba(49, 95, 114, 0.45);
  background: #fbfaf7;
}

.tool-icon {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  place-items: center;
  border-radius: 8px;
  background: #e8eee9;
  color: #243844;
  font-weight: 800;
}

.tool-card:hover {
  border-color: rgba(20, 92, 158, 0.45);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.tool-card p {
  margin: 10px 0 18px;
  color: var(--muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--muted);
  padding: 4px 9px;
  font-size: 12px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  padding: 28px 0 44px;
}

.content,
.sidebar-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 12px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.metric strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
}

.content {
  padding: 24px;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 16px;
}

.sidebar-block {
  padding: 16px;
}

.sidebar-block h2,
.sidebar-block h3 {
  font-size: 16px;
}

.tool-shell {
  margin: 22px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.tool-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: var(--surface-strong);
  padding: 12px;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-body {
  display: grid;
  gap: 14px;
  padding: 14px;
}

.split {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  font: inherit;
}

textarea {
  min-height: 280px;
  resize: vertical;
  padding: 12px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
}

input,
select {
  min-height: 42px;
  padding: 8px 10px;
}

button,
.button {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--brand);
  border-radius: var(--radius);
  background: var(--brand);
  color: #fff;
  padding: 8px 13px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover,
.button:hover {
  background: var(--brand-dark);
  text-decoration: none;
}

button.secondary,
.button.secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--text);
}

button.secondary:hover,
.button.secondary:hover {
  border-color: var(--brand);
  background: var(--surface-strong);
}

.result {
  min-height: 70px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfe;
  padding: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
}

.muted {
  color: var(--muted);
}

.notice {
  border-left: 4px solid var(--accent);
  background: #edf8f5;
  padding: 12px 14px;
  color: #17463c;
}

.formula {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfaf7;
  color: var(--code);
  padding: 14px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  overflow-x: auto;
}

.page-meta {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.faq-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 12px 14px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
}

.faq-list p {
  margin-bottom: 0;
}

.ad-slot {
  display: grid;
  min-height: 92px;
  place-items: center;
  border: 1px dashed #bac4d0;
  border-radius: var(--radius);
  background: #f9fafb;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.article-body {
  max-width: 780px;
}

.article-body p,
.article-body li {
  color: #344256;
}

.article-body h2 {
  margin-top: 28px;
  font-size: 24px;
}

.article-body ul {
  padding-left: 22px;
}

.article-hero-image {
  width: 100%;
  margin: 22px 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface-strong);
}

.article-hero-image img {
  display: block;
  width: 100%;
  height: auto;
}

.article-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-summary {
  display: grid;
  gap: 10px;
  margin: 22px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfaf7;
  padding: 16px;
}

.article-summary strong {
  color: var(--text);
}

.source-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

[data-lang-panel][hidden] {
  display: none;
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 26px 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 22px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 860px) {
  .hero-grid,
  .page-layout,
  .split {
    grid-template-columns: 1fr;
  }

  .tool-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calculator-grid,
  .metric-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 34px;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .hero {
    padding-top: 34px;
  }

  .tool-grid,
  .stat-row {
    grid-template-columns: 1fr;
  }

  .footer-grid,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  textarea {
    min-height: 220px;
  }
}