:root {
  --bg: #f5f7f4;
  --surface: #ffffff;
  --surface-soft: #ecf4f1;
  --surface-strong: #d9ece6;
  --text: #16302b;
  --muted: #55736b;
  --primary: #0f766e;
  --primary-dark: #0a5852;
  --accent: #d97706;
  --border: rgba(22, 48, 43, 0.12);
  --shadow: 0 18px 45px rgba(15, 38, 35, 0.08);
  --radius: 22px;
  --container: 1160px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.12), transparent 30%),
    linear-gradient(180deg, #fbfcfb, var(--bg));
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  color: var(--primary-dark);
}

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

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  background: #fff;
  color: var(--text);
}

textarea {
  resize: vertical;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin: 0 auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(251, 252, 251, 0.86);
  border-bottom: 1px solid rgba(22, 48, 43, 0.08);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.85rem;
  background: linear-gradient(135deg, var(--primary), #19a28e);
  color: #fff;
  box-shadow: var(--shadow);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 600;
}

.site-nav a[aria-current="page"] {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 0.65rem 0.9rem;
  cursor: pointer;
}

.hero,
.page-hero {
  padding: 5rem 0 3.5rem;
}

.hero-grid,
.two-col {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.3fr 0.9fr;
  align-items: start;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 4.2rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 0.9rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.7rem;
}

.hero-copy,
.section-head p,
.page-hero p {
  max-width: 70ch;
  color: var(--muted);
}

.hero-panel,
.panel,
.info-card,
.tool-card,
.article-card,
.faq-item,
.content-block {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(22, 48, 43, 0.09);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel,
.panel,
.article-card,
.faq-item,
.content-block {
  padding: 1.6rem;
}

.feature-list,
.plain-list {
  margin: 0;
  padding-left: 1.2rem;
}

.feature-list li,
.plain-list li {
  margin-bottom: 0.65rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.82rem 1.2rem;
  border: 0;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #13988a);
  color: #fff;
  box-shadow: 0 14px 24px rgba(15, 118, 110, 0.22);
}

.btn-secondary {
  background: var(--surface-soft);
  color: var(--text);
  border: 1px solid rgba(22, 48, 43, 0.08);
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.search-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  margin-top: 1.5rem;
}

.search-bar input {
  flex: 1 1 320px;
}

.standalone {
  max-width: 720px;
}

.section,
.tool-section {
  padding: 2rem 0 4rem;
}

.compact {
  padding-top: 0;
}

.surface,
.alt {
  background: linear-gradient(180deg, rgba(217, 236, 230, 0.3), rgba(255, 255, 255, 0));
}

.section-head {
  margin-bottom: 1.8rem;
}

.card-grid,
.article-list,
.faq-list,
.panel-list,
.tool-grid,
.anchor-grid {
  display: grid;
  gap: 1.25rem;
}

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

.info-card {
  padding: 1.5rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.info-card:hover,
.tool-card:hover,
.article-card:hover,
.faq-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 38px rgba(15, 38, 35, 0.12);
}

.card-icon {
  display: inline-grid;
  place-items: center;
  min-width: 3.4rem;
  height: 3.4rem;
  margin-bottom: 1rem;
  border-radius: 1rem;
  background: var(--surface-strong);
  color: var(--primary-dark);
  font-weight: 800;
}

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

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

.tool-card {
  padding: 1.4rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.tool-card.wide {
  grid-column: span 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1rem;
}

.stats-grid div {
  padding: 1rem;
  background: var(--surface-soft);
  border-radius: 16px;
  text-align: center;
}

.stats-grid strong {
  display: block;
  font-size: 1.3rem;
}

.stats-grid span,
.tool-note {
  color: var(--muted);
}

.range-grid,
.check-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.range-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
}

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

.output-box,
.qr-box,
.file-list {
  min-height: 108px;
  margin-top: 1rem;
  padding: 1rem;
  background: #102521;
  color: #e2f5ee;
  border-radius: 16px;
}

.qr-box {
  display: grid;
  place-items: center;
  background: var(--surface-soft);
  color: var(--muted);
}

.file-list {
  background: var(--surface-soft);
  color: var(--text);
}

.file-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(22, 48, 43, 0.08);
}

.file-row:last-child {
  border-bottom: 0;
}

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

.preview-image {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: #fff;
  min-height: 180px;
  object-fit: cover;
}

.content-block {
  padding: 1.8rem;
}

.content-block ol {
  padding-left: 1.2rem;
}

.anchor-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.anchor-grid a {
  display: block;
  padding: 0.95rem 1rem;
  background: var(--surface);
  border-radius: 999px;
  border: 1px solid var(--border);
  text-align: center;
  font-weight: 700;
}

.article-list,
.faq-list,
.panel-list {
  grid-template-columns: 1fr;
}

.contact-form {
  display: grid;
  gap: 0.85rem;
}

.site-footer {
  background: #0f2623;
  color: #d8ede7;
  padding-top: 3rem;
}

.site-footer a {
  display: block;
  margin-bottom: 0.55rem;
  color: #c6efe6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr;
  gap: 1.5rem;
}

.footer-bottom {
  padding: 1rem 0 2rem;
  border-top: 1px solid rgba(216, 237, 231, 0.12);
  margin-top: 1.5rem;
}

.hidden {
  display: none !important;
}

[data-hidden="true"] {
  display: none !important;
}

@media (max-width: 980px) {
  .hero-grid,
  .two-col,
  .card-grid,
  .tool-grid.triple,
  .footer-grid,
  .anchor-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tool-grid,
  .preview-grid,
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tool-card.wide,
  .hero-grid > *,
  .two-col > * {
    grid-column: auto;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.4rem);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }

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

  .hero-grid,
  .two-col,
  .card-grid,
  .tool-grid,
  .tool-grid.triple,
  .stats-grid,
  .preview-grid,
  .range-grid,
  .check-grid,
  .footer-grid,
  .anchor-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .page-hero {
    padding-top: 4rem;
  }
}