/* ============================================================
   HR Measured — Main Stylesheet
   ============================================================ */

/* --- Custom Properties --- */
:root {
  --color-bg: #ffffff;
  --color-surface: #f8f9fb;
  --color-border: #e5e7eb;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-accent: #1e3a5f;
  --color-accent-light: #2d5282;
  --color-highlight: #3b82f6;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'DM Serif Display', Georgia, serif;

  --max-width: 1120px;
  --narrow-width: 720px;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 7rem;

  --radius: 4px;
  --transition: 150ms ease;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
ul { list-style: none; }

/* --- Base --- */
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-family: var(--font-serif); font-weight: 400; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.15rem; }
h4 { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-muted); margin-bottom: 0.5rem; }

p { max-width: 68ch; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.container--narrow {
  max-width: var(--narrow-width);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.925rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: 0.01em;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover { background: var(--color-accent-light); }

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  border-color: transparent;
}
.btn--ghost:hover { color: var(--color-accent-light); text-decoration: underline; }

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover { background: var(--color-accent); color: #fff; }

/* --- Site Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: -0.02em;
}

.logo-hr {
  color: var(--color-accent);
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.nav-link:hover, .nav-link.active { color: var(--color-text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  padding: var(--space-xl) 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.hero-content { max-width: 680px; }

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-highlight);
  margin-bottom: 1.25rem;
  max-width: none;
}

.hero-headline {
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Section common --- */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-highlight);
  margin-bottom: 1rem;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.section-cta {
  margin-top: 3rem;
  text-align: center;
}

/* --- Philosophy --- */
.philosophy {
  padding: var(--space-xl) 0;
}

.philosophy h2 { margin-bottom: 0; }

.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2.5rem;
  margin-top: 3.5rem;
}

.principle { border-top: 2px solid var(--color-accent); padding-top: 1.5rem; }

.principle-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.principle h3 { margin-bottom: 0.75rem; font-size: 1.05rem; }
.principle p { font-size: 0.95rem; color: var(--color-text-muted); }

/* --- Service Cards --- */
.services-preview { padding: var(--space-xl) 0; background: var(--color-surface); }

.service-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  position: relative;
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(30,58,95,0.08);
}

.service-card h3 { font-size: 1rem; margin: 0; }
.service-card p { font-size: 0.9rem; color: var(--color-text-muted); margin: 0; flex: 1; }

.card-arrow {
  display: block;
  font-size: 1.1rem;
  color: var(--color-accent);
  transition: transform var(--transition);
}
.service-card:hover .card-arrow { transform: translateX(4px); }

/* --- Insights preview --- */
.insights-preview { padding: var(--space-xl) 0; }

.post-list { display: flex; flex-direction: column; gap: 2.5rem; margin-top: 2rem; }

.post-preview { border-bottom: 1px solid var(--color-border); padding-bottom: 2.5rem; }
.post-preview:last-child { border-bottom: none; }

.post-date {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.post-preview h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.post-preview h3 a { text-decoration: none; color: var(--color-text); }
.post-preview h3 a:hover { color: var(--color-accent); }
.post-preview p { font-size: 0.95rem; color: var(--color-text-muted); }

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-lg) 0;
  text-align: center;
}

.cta-banner h2 {
  color: #fff;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-inline: auto;
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 { margin-bottom: 1rem; }

.page-intro {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  line-height: 1.7;
}

/* --- About page --- */
.about-body { padding: var(--space-lg) 0; }

.about-block {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
}
.about-block:last-of-type { border-bottom: none; }
.about-block h2 { margin-bottom: 1.25rem; }
.about-block p { margin-bottom: 1rem; color: var(--color-text-muted); }
.about-block p:last-child { margin-bottom: 0; }
.about-block em { color: var(--color-text); font-style: italic; }

.influence-list { display: flex; flex-direction: column; gap: 1rem; }
.influence-list li { color: var(--color-text-muted); font-size: 0.95rem; padding-left: 0; }
.influence-list li strong { color: var(--color-text); }

.about-block ul:not(.influence-list) {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-left: 1.25rem;
  list-style: disc;
  color: var(--color-text-muted);
}

.about-cta { margin-top: 3rem; }
.about-cta p { margin-bottom: 1.5rem; font-size: 1.05rem; }

/* --- Services page --- */
.services-detail { padding: var(--space-lg) 0; }
.engagement-model { padding: var(--space-lg) 0; background: var(--color-surface); }
.engagement-model > .container--narrow { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.engagement-model h2 { margin-bottom: 1.25rem; }
.engagement-model p { color: var(--color-text-muted); margin-bottom: 1rem; }

.service-item {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 2rem;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}
.service-item:last-child { border-bottom: none; }

.service-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  padding-top: 0.4rem;
  letter-spacing: 0.05em;
}

.service-content h2 { margin-bottom: 1rem; font-size: 1.5rem; }
.service-content p { color: var(--color-text-muted); margin-bottom: 1rem; }
.service-content h4 { margin-top: 1.5rem; }
.service-content ul {
  list-style: disc;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.service-note {
  font-size: 0.85rem !important;
  color: var(--color-text-muted);
  border-left: 3px solid var(--color-border);
  padding-left: 1rem;
  margin-top: 1rem;
}

/* --- Insights page --- */
.insights-list { padding: var(--space-lg) 0; }

.post-preview--full { margin-bottom: 3rem; }
.post-preview--full h2 { font-size: 1.4rem; margin-bottom: 0.5rem; }
.post-preview--full h2 a { text-decoration: none; color: var(--color-text); }
.post-preview--full h2 a:hover { color: var(--color-accent); }
.post-preview--full p { color: var(--color-text-muted); margin-bottom: 0.75rem; }

.read-more {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
}
.read-more:hover { text-decoration: underline; }

.empty-state { color: var(--color-text-muted); font-style: italic; }

/* --- Post article --- */
.post-article { padding: var(--space-lg) 0; }

.post-header { margin-bottom: 3rem; padding-bottom: 2rem; border-bottom: 1px solid var(--color-border); }
.post-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.tag {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.15rem 0.6rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  text-transform: capitalize;
}

.post-excerpt {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  line-height: 1.65;
}

.post-body { color: var(--color-text); }
.post-body h2 { font-size: 1.4rem; margin: 2.5rem 0 1rem; }
.post-body h3 { font-size: 1.1rem; margin: 2rem 0 0.75rem; }
.post-body p { margin-bottom: 1.25rem; color: var(--color-text-muted); }
.post-body p:first-child { color: var(--color-text); }
.post-body strong { color: var(--color-text); }
.post-body em { font-style: italic; }
.post-body ul, .post-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--color-text-muted);
}
.post-body ul { list-style: disc; }
.post-body ol { list-style: decimal; }

.post-footer { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }
.back-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
}
.back-link:hover { text-decoration: underline; }

/* --- Contact page --- */
.contact-body { padding: var(--space-lg) 0; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.form-group { margin-bottom: 1.5rem; }

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

input, textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition);
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(30,58,95,0.08);
}

textarea { resize: vertical; }

.hidden { display: none; }

.contact-info h3 { margin-bottom: 1rem; }
.contact-info p { color: var(--color-text-muted); margin-bottom: 1rem; font-size: 0.95rem; }

.contact-direct { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }
.contact-direct p { font-size: 0.875rem; margin-bottom: 0.5rem; }

.contact-email {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
}
.contact-email:hover { text-decoration: underline; }

/* --- Footer --- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.footer-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-nav a:hover { color: var(--color-text); }

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    align-items: flex-start;
  }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .site-header { position: relative; }

  .hero { padding: var(--space-lg) 0; }
  .philosophy, .services-preview, .insights-preview { padding: var(--space-lg) 0; }

  .principles { grid-template-columns: 1fr; }
  .service-cards { grid-template-columns: 1fr; }
  .service-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .service-number { display: none; }

  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }

  h1 { font-size: 2rem; }
}