/* archetype: bureau */
:root {
  --color-bg: #f4f8f7;
  --color-text: #17302e;
  --color-accent: #0a7370;
  --color-surface: #e5efed;
  --color-hover: #085d5a;
  --color-border: #d0dedb;
  --font-heading: 'Roboto Slab', Georgia, 'Times New Roman', serif;
  --font-body: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --border-radius-base: 5px;
  --heading-weight: 700;
  --heading-letter-spacing: 0;
  --section-padding: 2rem 0;
  --card-border: 1px solid var(--color-border);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.10);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.65;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: var(--heading-letter-spacing);
  margin-top: 1.5rem;
}

h2 {
  font-size: 1.55rem;
  font-weight: var(--heading-weight);
  letter-spacing: var(--heading-letter-spacing);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.4rem;
  margin-top: 0.5rem;
}

h3 {
  font-size: 1.2rem;
  font-weight: var(--heading-weight);
}

h4 { font-size: 1.05rem; font-weight: var(--heading-weight); }

p { margin: 0 0 1rem; }

a { color: var(--color-accent); text-decoration: underline; }
a:hover { color: var(--color-hover); }

img { max-width: 100%; height: auto; }

/* Header */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--card-shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
}
.brand { display: inline-flex; align-items: center; line-height: 0; }
.brand-logo { height: 42px; width: auto; }
.primary-nav { display: flex; align-items: center; gap: 0.35rem; flex-wrap: wrap; }
.nav-link {
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: var(--border-radius-base);
}
.nav-link:hover { color: var(--color-accent); background-color: var(--color-surface); }

/* CSS-only hamburger toggle */
.nav-toggle-input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.nav-toggle { display: none; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; }
.nav-toggle-input:focus-visible ~ .nav-toggle { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* Main */
.main-content { padding: 1rem 1.25rem 2.5rem; }
.content-section { padding: var(--section-padding); }
.content-section::after { content: ""; display: block; clear: both; }

/* Intro block (rolled: lead-section) */
.lead-section {
  background-color: var(--color-surface);
  border: var(--card-border);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0 1.5rem;
}
.lead-section p { margin-bottom: 0; }
.lead-section p:first-child { font-size: 1.1em; }

/* Images */
.img-center {
  display: block;
  margin: 1.5rem auto;
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
}
.img-right {
  float: right;
  margin: 0.4rem 0 1rem 1.5rem;
  max-width: 45%;
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
}
.img-left {
  float: left;
  margin: 0.4rem 1.5rem 1rem 0;
  max-width: 45%;
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
}

/* Table (rolled: info-table) — bureau classic business table */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border: var(--card-border);
  border-radius: var(--border-radius-base);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}
.info-table th {
  background-color: var(--color-accent);
  color: var(--color-bg);
  padding: 0.75rem 1rem;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
}
.info-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}
.info-table tbody tr:nth-child(even) { background-color: var(--color-surface); }
.info-table tbody tr:last-child td { border-bottom: none; }

/* Pros/Cons (rolled: compare-block) */
.compare-block {
  margin: 1.5rem 0;
  padding: 1.25rem;
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
}
.compare-block h4 { color: var(--color-accent); font-weight: var(--heading-weight); margin-bottom: 0.75rem; }
.compare-block .col-md-6 {
  background-color: var(--color-bg);
  border: var(--card-border);
  border-radius: var(--border-radius-base);
  padding: 1rem;
}
.compare-block ul { padding-left: 1.25rem; margin: 0; }
.compare-block li { margin-bottom: 0.4rem; }

/* Button (rolled: action-btn) */
.action-btn {
  display: inline-block;
  padding: 0.55rem 1.6rem;
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--border-radius-base);
  font-family: var(--font-heading);
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  transition: background-color 0.2s;
}
.action-btn:hover { background-color: var(--color-hover); color: var(--color-bg); text-decoration: none; }

/* Note (rolled: info-note) */
.info-note {
  position: relative;
  margin: 1.25rem 0;
  padding: 0.75rem 1rem 0.75rem 1.25rem;
  background-color: var(--color-surface);
  border: var(--card-border);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  color: var(--color-text);
  font-size: 0.95rem;
}
.info-note::before {
  content: "Lưu ý";
  display: block;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Injected: highlight-box (rolled: focus-block) */
.focus-block {
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 1.1rem 1.35rem;
  margin: 1.5rem 0;
}

/* Injected: quick-facts (rolled: key-points / key-point) */
.key-points {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.75rem 0;
}
.key-point {
  flex: 1 1 0;
  min-width: 180px;
  text-align: center;
  background-color: var(--color-surface);
  border: var(--card-border);
  border-bottom: 3px solid var(--color-accent);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 1rem 0.9rem;
  font-weight: 600;
}

/* Injected: tip-box (rolled: insight-box / insight-icon) */
.insight-box {
  position: relative;
  background-color: var(--color-surface);
  border: var(--card-border);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.insight-icon { color: var(--color-accent); font-weight: 700; margin-right: 0.5rem; }

/* Injected: section-divider (rolled: content-divider) */
.content-divider {
  width: 60px;
  height: 2px;
  margin: 2rem auto;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

/* Injected: stat-block (rolled: stats-row / stat-item / stat-num / stat-label) */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.75rem 0;
}
.stat-item {
  flex: 1 1 0;
  min-width: 150px;
  text-align: center;
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 1.1rem 0.9rem;
}
.stat-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 2em;
  font-weight: var(--heading-weight);
  color: var(--color-accent);
  line-height: 1.1;
}
.stat-label { display: block; font-size: 0.8em; margin-top: 0.35rem; color: var(--color-text); }

/* Injected: callout (rolled: standout-block) */
.standout-block {
  width: 100%;
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  text-align: center;
  font-size: 1.05em;
  padding: 1.5rem 2rem;
  margin: 1.75rem 0;
}
.standout-block p { margin: 0; }

/* Injected: badge-row (rolled: trust-badges / trust-badge) */
.trust-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.5rem 0; }
.trust-badge {
  border: 1px solid var(--color-accent);
  color: var(--color-text);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85em;
  background-color: var(--color-surface);
}

/* Injected: steps-compact (rolled: how-it-works / process-item / process-num / process-label) */
.how-it-works { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.75rem 0; }
.process-item {
  flex: 1 1 0;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 0.9rem 1rem;
}
.process-num {
  flex-shrink: 0;
  width: 2em;
  height: 2em;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-bg);
  text-align: center;
  line-height: 2em;
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
}
.process-label { font-size: 0.9em; font-weight: 600; }

/* Structure-driven: H3 columns (rolled: split-cols / tri-panel / panel-item) */
.split-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin: 1.5rem 0; }
.tri-panel { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; margin: 1.5rem 0; }
.panel-item {
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 1.1rem 1.25rem;
}

/* Structure-driven: list-cards (rolled: feature-cards) */
.feature-cards {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.feature-cards li {
  background-color: var(--color-surface);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--border-radius-base);
  padding: 0.9rem 1rem;
}

/* Structure-driven: list-icon (rolled: feature-list) */
.feature-list { list-style: none; padding-left: 0; margin: 1.5rem 0; }
.feature-list li { position: relative; padding-left: 1.5rem; margin-bottom: 0.6rem; }
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  background-color: var(--color-accent);
}

/* Structure-driven: list-steps (rolled: numbered-steps) */
.numbered-steps { list-style: none; counter-reset: step; padding-left: 0; margin: 1.5rem 0; }
.numbered-steps li {
  position: relative;
  counter-increment: step;
  padding-left: 3rem;
  margin-bottom: 1rem;
  min-height: 2.2rem;
}
.numbered-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  text-align: center;
  line-height: 2.2rem;
}

/* Section zones (rolled: section-alt) */
.section-alt { background-color: var(--color-surface); }

/* FAQ */
.faq-section .faq-item {
  border-top: 1px solid var(--color-border);
  padding-top: 1.1rem;
  margin-top: 1.1rem;
}
.faq-section .faq-item:first-of-type { border-top: none; }
.faq-section h3 { color: var(--color-accent); }

/* Footer */
.site-footer {
  background-color: var(--color-surface);
  border-top: 2px solid var(--color-accent);
  margin-top: 2rem;
  padding: 1.75rem 0;
  text-align: center;
  font-size: 0.95rem;
}
.site-footer p { margin: 0.3rem 0; }
.site-footer a { color: var(--color-accent); }

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    cursor: pointer;
    border-radius: var(--border-radius-base);
  }
  .primary-nav { display: none; width: 100%; flex-direction: column; align-items: flex-start; gap: 0; margin-top: 0.5rem; }
  .nav-toggle-input:checked ~ .primary-nav { display: flex; }
  .primary-nav .nav-link { display: block; width: 100%; padding: 0.7rem 0.2rem; border-bottom: 1px solid var(--color-border); border-radius: 0; }

  .img-left, .img-right { float: none; display: block; margin: 1.5rem auto; max-width: 100%; }

  .key-points, .stats-row, .how-it-works { flex-direction: column; }
  .split-cols, .tri-panel, .feature-cards { grid-template-columns: 1fr; }

  .info-table { border: none; box-shadow: none; }
  .info-table thead { display: none; }
  .info-table tr {
    display: block;
    margin-bottom: 1rem;
    border: var(--card-border);
    border-radius: var(--border-radius-base);
    box-shadow: var(--card-shadow);
    background-color: var(--color-bg);
  }
  .info-table tbody tr:nth-child(even) { background-color: var(--color-bg); }
  .info-table td {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    border-bottom: 1px solid var(--color-border);
    padding: 0.55rem 0.85rem;
    text-align: right;
  }
  .info-table td:last-child { border-bottom: none; }
  .info-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--color-accent);
    flex-shrink: 0;
    text-align: left;
  }
}

@media (max-width: 480px) {
  .stat-item, .process-item { min-width: 100%; }
}