:root {
  --bg: #f4efe6;
  --ink: #16212c;
  --muted: #5e6a77;
  --line: rgba(22, 33, 44, 0.12);
  --accent: #17466f;
  --accent-soft: #dbe8f2;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: #ffffff;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 44px rgba(19, 34, 52, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(23, 70, 111, 0.12), transparent 24rem),
    linear-gradient(180deg, #fbf7f0 0%, #f0e7da 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

.site-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 3rem;
}

.site-shell-inner {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  background: linear-gradient(135deg, #17466f 0%, #2c6b9c 100%);
  color: #ffffff;
  font-weight: 800;
}

.brand-copy {
  display: grid;
  gap: 0.12rem;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.84rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 700;
}

.site-nav a[data-active="true"],
.site-nav a:hover {
  color: var(--accent);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.75);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
  gap: 1.5rem;
  align-items: center;
  min-height: calc(100svh - 5rem);
  padding: 1.5rem 0 3rem;
}

.hero-copy,
.hero-panel,
.tool-layout,
.section,
.article-card,
.page-hero,
.faq-section {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 360ms ease, transform 420ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.tool-heading h2,
.page-hero h1,
.article-card h2 {
  margin: 0;
  font-family: "Fraunces", Georgia, serif;
  line-height: 0.98;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 5.5rem);
  max-width: 11ch;
}

.hero-text,
.section-heading p,
.tool-heading p,
.page-hero p,
.article-card p,
.feature-card p,
.faq-card p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions,
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  cursor: pointer;
}

.button-primary {
  background: linear-gradient(135deg, #17466f 0%, #2c6b9c 100%);
  color: #ffffff;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.75);
  border-color: var(--line);
  color: var(--ink);
}

.hero-panel-card,
.tool-card,
.sidebar-card,
.feature-card,
.faq-card,
.article-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-panel-card,
.sidebar-card,
.feature-card,
.faq-card,
.article-card {
  padding: 1.4rem;
}

.hero-list,
.detail-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}

.hero-list li,
.detail-list li {
  position: relative;
  padding-left: 1.2rem;
  color: var(--muted);
  line-height: 1.6;
}

.hero-list li::before,
.detail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 999px;
  background: var(--accent);
}

.tool-layout,
.article-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.7fr);
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.tool-card {
  padding: 1.5rem;
}

.tool-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.tool-form-offset {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field span {
  font-weight: 700;
}

.field input,
.field select {
  min-height: 3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.95rem;
  background: var(--surface-strong);
}

.field-checkbox {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.75rem;
}

.field-checkbox input {
  min-height: auto;
  margin: 0;
}

.notice {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
}

.notice-error {
  background: #fff0f0;
  color: #8a2d2d;
  border: 1px solid rgba(138, 45, 45, 0.16);
}

.result-grid,
.feature-grid,
.faq-grid {
  display: grid;
  gap: 1rem;
}

.result-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.result-grid-single {
  grid-template-columns: 1fr;
}

.result-card {
  padding: 1.15rem;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--line);
}

.result-card-primary {
  background: linear-gradient(180deg, #17466f 0%, #245d8b 100%);
  color: #ffffff;
}

.result-card-primary .small-copy,
.result-card-primary .result-label {
  color: rgba(255, 255, 255, 0.8);
}

.result-label {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-card strong {
  display: block;
  font-size: 1.6rem;
  line-height: 1.15;
}

.small-copy {
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.preset-grid,
.stack-link-list {
  display: grid;
  gap: 0.8rem;
}

.chip,
.stack-link {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.7);
}

.chip {
  cursor: pointer;
  text-align: left;
  font-weight: 700;
}

.stack-link strong {
  display: block;
}

.stack-link span span {
  color: var(--muted);
}

.stack-link em {
  color: var(--accent);
  font-style: normal;
  font-weight: 800;
}

.section {
  padding: 3rem 0;
}

.section-heading {
  max-width: 48rem;
  margin-bottom: 1.5rem;
}

.section-heading h2,
.page-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.8rem);
}

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

.article-card section + section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.article-card-wide {
  margin: 1.5rem 0 0;
}

.page-main {
  padding: 2rem 0 3rem;
}

.page-hero {
  max-width: 54rem;
  margin-bottom: 2rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 1040px) {
  .hero,
  .tool-layout,
  .article-shell,
  .feature-grid,
  .faq-grid,
  .tool-form-offset {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 1rem, 100%);
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 0;
    min-width: 15rem;
    padding: 0.8rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.is-open {
    display: flex;
  }

  .result-grid {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}