/* Insight STEM — single-page site
   Flat, academic, generous whitespace. No gradients or decorative effects. */

:root {
  --navy: #1E2A4A;
  --teal: #2E8B82;
  --teal-dark: #256f68;
  --cream: #F7F5F0;
  --slate: #5B6B7A;
  --ink: #1E2A4A;
  --body: #33404f;
  --surface: #FFFFFF;
  --border: #E4E0D6;
  --border-strong: #d7d2c4;

  --maxw: 1080px;
  --radius: 10px;

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--body);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1rem; }

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  padding: 15px 26px;
  border-radius: var(--radius);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn-sm { padding: 11px 18px; font-size: .95rem; }

.btn-primary {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
}
.btn-primary:hover { background: var(--teal-dark); border-color: var(--teal-dark); color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--navy);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--navy); color: var(--navy); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--cream);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-right: auto;
}
.wordmark-icon { display: block; flex: none; }
.wordmark-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: .2px;
  white-space: nowrap;
}
.wm-insight { color: var(--navy); }
.wm-stem { color: var(--teal); }

.cta-short { display: none; }

.site-nav { display: flex; gap: 28px; }
.site-nav a {
  color: var(--slate);
  text-decoration: none;
  font-weight: 500;
  font-size: .98rem;
}
.site-nav a:hover { color: var(--navy); }

/* Sections */
.section { padding: 88px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-title { font-size: clamp(1.8rem, 3.4vw, 2.4rem); }
.section-intro {
  max-width: 60ch;
  color: var(--slate);
  font-size: 1.08rem;
  margin-bottom: 2.5rem;
}

/* Hero */
.hero { padding: 80px 0; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2rem, 3.6vw, 2.9rem);
  font-weight: 500;
}
.lede {
  font-size: 1.2rem;
  color: var(--slate);
  max-width: 46ch;
  margin-bottom: 2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
}
.hero-card h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Tick lists */
.tick-list { list-style: none; margin: 0; padding: 0; }
.tick-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 12px;
  color: var(--body);
  font-size: .98rem;
}
.tick-list li:last-child { margin-bottom: 0; }
.tick-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--teal);
  transform: rotate(45deg);
}

/* Credibility grid */
.cred-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.cred-item {
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.section:not(.section-alt) .cred-item { background: var(--surface); }
.cred-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--navy);
  font-size: 1.05rem;
  margin-bottom: 4px;
}
.cred-detail { color: var(--slate); font-size: .96rem; }

/* Services */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
}
.section-alt .service-card { background: var(--cream); }
.service-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
}
.service-desc { color: var(--slate); font-size: .98rem; }
.service-topics {
  list-style: none;
  margin: 4px 0 24px;
  padding: 0;
}
.service-topics li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: .95rem;
}
.service-topics li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--teal);
  transform: rotate(45deg);
}
.price-block {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--navy);
  margin: 0;
}
.price-secondary { font-size: 1.15rem; color: var(--slate); margin-top: 4px; }
.price-tag {
  display: block;
  font-family: var(--font-body);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 2px;
}
.price-unit {
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 500;
  color: var(--slate);
}
.services-note {
  margin-top: 32px;
  max-width: 68ch;
  color: var(--slate);
  font-size: .98rem;
}
.section-cta { margin-top: 32px; }

/* Testimonials */
.testimonial-placeholder {
  background: var(--cream);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
}
.section-alt .testimonial-placeholder { background: var(--surface); }
.testimonial-placeholder p { margin: 0 0 6px; font-size: 1.05rem; }
.muted { color: var(--slate); font-size: .96rem; }

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.testimonial {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 28px;
}
.section-alt .testimonial { background: var(--cream); }
.testimonial blockquote {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--ink);
}
.testimonial figcaption {
  font-size: .92rem;
  font-weight: 600;
  color: var(--navy);
}
.testimonial figcaption span { font-weight: 400; color: var(--slate); }

@media (max-width: 700px) {
  .testimonial-grid { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: #d9dee7;
  padding: 64px 0 28px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}
.footer-brand { max-width: 280px; }
.footer-wordmark {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  display: inline-block;
  vertical-align: middle;
  margin-left: 10px;
}
.footer-tag { color: #9aa6b8; font-size: .95rem; margin-top: 12px; }
.footer-contact h2 {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: .75rem;
}
.footer-contact a { color: #fff; }
.footer-contact > p a { text-decoration: underline; }
.social-list {
  list-style: none;
  display: flex;
  gap: 20px;
  padding: 0;
  margin: 12px 0 22px;
}
.social-list a { color: #d9dee7; text-decoration: none; }
.social-list a:hover { color: #fff; }
.footer-legal {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}
.footer-legal p { margin: 0; font-size: .88rem; color: #9aa6b8; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-copy h1 { max-width: 24ch; }
  .service-grid { grid-template-columns: 1fr; }
  .cred-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .site-nav { display: none; }
  .header-cta { margin-left: auto; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 60px 0; }
  .hero { padding: 48px 0 56px; }
  .header-inner { min-height: 64px; }
  .wordmark-text { font-size: 1.2rem; }
  .hero-actions .btn { flex: 1 1 100%; text-align: center; }
}

@media (max-width: 560px) {
  .cta-full { display: none; }
  .cta-short { display: inline; }
}

@media (max-width: 480px) {
  .header-cta { font-size: .88rem; padding: 10px 14px; }
  .footer-inner { gap: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}