@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=Manrope:wght@400;500;600;700;800&display=swap");

:root {
  --bg: #f7fafc;
  --bg-deep: #e7edf4;
  --paper: rgba(255, 255, 255, 0.94);
  --paper-strong: rgba(255, 255, 255, 0.98);
  --ink: #172033;
  --ink-soft: #32445c;
  --muted: #5b6b80;
  --muted-soft: #76869a;
  --line: rgba(23, 32, 51, 0.12);
  --line-strong: rgba(23, 32, 51, 0.22);
  --primary: #1264a3;
  --primary-strong: #0b4f82;
  --primary-soft: rgba(18, 100, 163, 0.1);
  --secondary: #16805c;
  --secondary-strong: #0f6849;
  --secondary-soft: rgba(22, 128, 92, 0.12);
  --accent: #744210;
  --success: #16805c;
  --warning: #a16207;
  --shadow: 0 18px 48px rgba(23, 32, 51, 0.11);
  --shadow-soft: 0 10px 28px rgba(23, 32, 51, 0.08);
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  line-height: 1.7;
  background:
    linear-gradient(90deg, rgba(18, 100, 163, 0.08), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, #fff 48%, #eef4f8 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(18, 100, 163, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 100, 163, 0.045) 1px, transparent 1px);
  background-size: 28px 28px, 28px 28px;
  opacity: 0.55;
  z-index: 0;
}

img {
  max-width: 100%;
}

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

a:hover {
  text-decoration: underline;
}

button,
input,
select,
textarea {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 999;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.container {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 78px 0;
}

.section-tight {
  padding: 40px 0 72px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  backdrop-filter: blur(16px);
  background: rgba(247, 250, 252, 0.88);
  border-bottom: 1px solid rgba(38, 64, 61, 0.12);
}

.header-shell {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--ink);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 14px 28px rgba(18, 100, 163, 0.18);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 1.06rem;
  line-height: 1.1;
}

.brand-text span {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 48px;
  padding: 0 16px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--paper-strong);
  color: var(--ink);
  font-weight: 800;
  box-shadow: var(--shadow-soft);
}

.nav-toggle:hover {
  cursor: pointer;
}

.main-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.main-nav a {
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--muted);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.84);
  text-decoration: none;
}

.main-nav a.nav-cta {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #0d5f96);
}

.page-hero,
.hero {
  padding: 58px 0 18px;
}

.hero-layout,
.page-hero-layout,
.calc-shell,
.article-layout,
.split-grid,
.footer-grid {
  display: grid;
  gap: 28px;
}

.hero-layout {
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
}

.page-hero-layout {
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.64fr);
  align-items: end;
}

.eyebrow,
.meta-pill,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 6px;
  padding: 8px 13px;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.eyebrow {
  color: var(--primary-strong);
  background: rgba(15, 118, 110, 0.11);
}

.breadcrumbs {
  margin-bottom: 18px;
  color: var(--muted-soft);
  font-size: 0.94rem;
}

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

h1,
h2,
h3,
h4 {
  margin: 0 0 14px;
  color: var(--ink);
  line-height: 1.12;
}

h1,
h2 {
  font-family: "Fraunces", serif;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.6rem);
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

h3 {
  font-size: 1.2rem;
}

p {
  margin: 0 0 18px;
  color: var(--ink-soft);
}

.lead {
  max-width: 760px;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-actions,
.pill-row,
.meta-row,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.meta-row {
  margin-top: 20px;
}

.meta-pill {
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.72);
  text-transform: none;
  letter-spacing: 0;
}

.btn,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 800;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
}

.btn:hover,
.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #0d5f96);
}

.btn-secondary {
  color: var(--ink);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.85);
}

.btn-accent {
  color: #fff;
  background: linear-gradient(135deg, var(--secondary), #0f6849);
}

.hero-panel,
.surface-card,
.tool-card,
.guide-card,
.topic-card,
.sidebar-card,
.article-card,
.calc-card,
.results-panel,
.note-card,
.stat-card,
.comparison-card,
.footer-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 251, 245, 0.94));
  border: 1px solid rgba(38, 64, 61, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel,
.surface-card,
.tool-card,
.guide-card,
.topic-card,
.sidebar-card,
.article-card,
.calc-card,
.results-panel,
.note-card,
.stat-card,
.comparison-card,
.footer-panel {
  padding: 26px;
}

.hero-panel .mini-grid,
.stat-grid,
.tool-grid,
.guide-grid,
.topic-grid,
.panel-grid,
.quick-grid,
.insight-grid,
.results-grid,
.comparison-grid {
  display: grid;
  gap: 18px;
}

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

.stat-grid,
.quick-grid,
.results-grid,
.comparison-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.guide-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.stat-card {
  padding: 18px;
  box-shadow: none;
}

.stat-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.5rem;
  line-height: 1;
}

.tool-card,
.guide-card,
.topic-card {
  color: inherit;
  text-decoration: none;
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease;
}

.tool-card:hover,
.guide-card:hover,
.topic-card:hover {
  text-decoration: none;
  transform: translateY(-3px);
  border-color: rgba(15, 118, 110, 0.26);
  box-shadow: 0 22px 44px rgba(43, 46, 37, 0.14);
}

.card-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-strong);
  background: rgba(15, 118, 110, 0.1);
}

.tool-card p,
.guide-card p,
.topic-card p,
.sidebar-card p,
.note-card p,
.surface-card p,
.article-card p {
  color: var(--muted);
}

.tag {
  padding: 7px 11px;
  color: var(--primary-strong);
  background: rgba(15, 118, 110, 0.08);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading p:last-child {
  margin-bottom: 0;
}

.article-layout,
.split-grid {
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: start;
}

.calc-shell {
  grid-template-columns: minmax(0, 1.14fr) 340px;
  align-items: start;
}

.sidebar-stack,
.info-stack {
  display: grid;
  gap: 18px;
}

.article-card h2 + p,
.article-card h3 + p {
  margin-top: -4px;
}

.article-card ul,
.article-card ol,
.sidebar-card ul,
.sidebar-card ol {
  margin: 0 0 18px;
  padding-left: 20px;
  color: var(--muted);
}

.article-card li,
.sidebar-card li {
  margin-bottom: 10px;
}

.key-points,
.checklist,
.link-list,
.plain-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.key-points li,
.checklist li,
.link-list li,
.plain-list li {
  position: relative;
  padding-left: 26px;
  color: var(--muted);
}

.key-points li + li,
.checklist li + li,
.link-list li + li,
.plain-list li + li {
  margin-top: 12px;
}

.key-points li::before,
.checklist li::before,
.link-list li::before,
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--secondary);
}

.callout,
.highlight-box,
.note-box {
  padding: 18px 20px;
  border-radius: 8px;
  margin-bottom: 22px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  background: linear-gradient(135deg, rgba(18, 100, 163, 0.08), rgba(255, 255, 255, 0.94));
}

.highlight-box {
  border-color: rgba(116, 66, 16, 0.2);
  background: linear-gradient(135deg, rgba(116, 66, 16, 0.1), rgba(255, 255, 255, 0.94));
}

.note-box {
  border-color: rgba(15, 23, 42, 0.1);
  background: rgba(255, 255, 255, 0.8);
}

.byline {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  margin-bottom: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.byline strong {
  color: var(--ink);
}

.tiny-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted-soft);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.table-wrap {
  overflow-x: auto;
  margin: 22px 0;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

th,
td {
  padding: 15px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(15, 118, 110, 0.06);
}

tr:last-child td {
  border-bottom: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field label {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--ink-soft);
}

.input-wrap {
  position: relative;
}

.input-prefix,
.input-suffix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted-soft);
  font-weight: 700;
}

.input-prefix {
  left: 14px;
}

.input-suffix {
  right: 14px;
}

input[type="number"],
input[type="text"],
select,
textarea {
  width: 100%;
  min-height: 54px;
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  outline: none;
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease;
}

.has-prefix input {
  padding-left: 31px;
}

.has-suffix input {
  padding-right: 34px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(15, 118, 110, 0.48);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.12);
}

.calc-btn {
  width: 100%;
  margin-top: 18px;
  min-height: 56px;
  border: 0;
  border-radius: 8px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #0d5f96);
  box-shadow: var(--shadow-soft);
}

.calc-btn.green {
  background: linear-gradient(135deg, var(--success), #0f6849);
}

.calc-btn.amber {
  background: linear-gradient(135deg, var(--accent), #935f15);
}

.calc-btn.purple {
  background: linear-gradient(135deg, #243b6b, #1264a3);
}

.results {
  display: none;
  margin-top: 26px;
}

.results.show {
  display: block;
}

.results-panel {
  padding: 22px;
}

.results-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.result-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted-soft);
  font-size: 0.84rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-big {
  font-family: "Fraunces", serif;
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1;
  color: var(--primary-strong);
}

.result-big.green {
  color: var(--success);
}

.result-big.purple {
  color: #243b6b;
}

.result-stat {
  padding: 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.result-stat .label {
  margin-bottom: 6px;
  color: var(--muted-soft);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-stat .value {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--ink);
}

.result-stat .value.green {
  color: var(--success);
}

.result-stat .value.yellow {
  color: var(--warning);
}

.result-stat .value.purple {
  color: #243b6b;
}

.chart-box {
  margin-top: 22px;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  min-height: 220px;
}

.bar {
  flex: 1;
  min-width: 10px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: 6px 6px 0 0;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.06);
}

.bar-segment {
  width: 100%;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.92rem;
}

.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 50%;
}

.insight-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.insight-card {
  padding: 16px 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.insight-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
  color: var(--ink);
}

.insight-card p {
  margin: 0;
  font-size: 0.95rem;
}

.faq {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.faq-item {
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
  overflow: hidden;
}

.faq-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 18px 20px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 800;
  text-align: left;
}

.faq-trigger::after {
  content: "+";
  flex: none;
  font-size: 1.2rem;
  color: var(--primary-strong);
}

.faq-item.open .faq-trigger::after {
  content: "-";
}

.faq-content {
  display: none;
  padding: 0 20px 18px;
}

.faq-item.open .faq-content {
  display: block;
}

.footer {
  margin-top: 40px;
  border-top: 1px solid rgba(38, 64, 61, 0.12);
  background: rgba(241, 246, 250, 0.9);
}

.footer-grid {
  grid-template-columns: 1.2fr 0.9fr 0.9fr 0.9fr;
  padding: 38px 0 48px;
  gap: 24px;
}

.footer h4 {
  margin-bottom: 12px;
}

.footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.footer p,
.footer a,
.footer li {
  color: var(--muted);
}

.small {
  font-size: 0.94rem;
}

.center {
  text-align: center;
}

.divider {
  height: 1px;
  margin: 28px 0;
  border: 0;
  background: var(--line);
}

.microcopy {
  color: var(--muted-soft);
  font-size: 0.92rem;
}

.source-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.source-item {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
}

.source-item strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
}

.source-item p {
  margin-bottom: 0;
}

.scenario-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.scenario-strip > div {
  padding: 16px;
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  background: rgba(18, 100, 163, 0.07);
}

.scenario-strip strong {
  display: block;
  margin-bottom: 4px;
}

@media (max-width: 1100px) {
  .hero-layout,
  .page-hero-layout,
  .calc-shell,
  .article-layout,
  .split-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .guide-grid,
  .topic-grid,
  .results-grid,
  .insight-grid,
  .stat-grid,
  .quick-grid,
  .comparison-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    right: 24px;
    left: 24px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 18px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 12px 14px;
  }
}

@media (max-width: 720px) {
  .container {
    padding: 0 18px;
  }

  .hero,
  .page-hero {
    padding-top: 42px;
  }

  .hero-panel,
  .surface-card,
  .tool-card,
  .guide-card,
  .topic-card,
  .sidebar-card,
  .article-card,
  .calc-card,
  .results-panel,
  .note-card,
  .stat-card,
  .comparison-card {
    padding: 20px;
  }

  .tool-grid,
  .guide-grid,
  .topic-grid,
  .mini-grid,
  .results-grid,
  .insight-grid,
  .stat-grid,
  .quick-grid,
  .comparison-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .results-header {
    flex-direction: column;
  }

  table {
    min-width: 560px;
  }

  .scenario-strip {
    grid-template-columns: 1fr;
  }
}