:root {
  --color-bg-start: #ffffff;
  --color-bg-end: #2ed2c7;
  --color-surface: rgba(255, 255, 255, 0.86);
  --color-surface-alt: rgba(255, 255, 255, 0.65);
  --color-text: #063145;
  --color-muted: #567786;
  --color-accent: #0f9ea8;
  --color-accent-strong: #0b7e84;
  --color-border: rgba(11, 112, 123, 0.18);
  --max-width: 1180px;
  --transition: all 0.3s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at top right, rgba(15, 158, 168, 0.18), transparent 45%),
    linear-gradient(160deg, var(--color-bg-start), var(--color-bg-end));
  color: var(--color-text);
  line-height: 1.6;
}

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

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

a:hover,
a:focus {
  color: var(--color-accent);
}

.container {
  width: min(92vw, var(--max-width));
  margin: 0 auto;
}

.primary-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.primary-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.main-nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-weight: 500;
  opacity: 0.7;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a:focus,
.main-nav a.active {
  opacity: 1;
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-accent-strong);
  cursor: pointer;
}

.cta {
  padding: 0.65rem 1.2rem;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--color-accent), var(--color-accent-strong));
  color: #f7f9fc;
  font-weight: 600;
  box-shadow: 0 8px 18px rgba(20, 184, 166, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta:hover,
.btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(20, 184, 166, 0.45);
}

.hero,
.page-hero {
  padding: clamp(4rem, 8vw, 6rem) 0;
}

.hero .container,
.page-hero .container,
.contact-layout .container {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero .container {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 6vw, 3.4rem);
  line-height: 1.1;
  margin: 0.8rem 0 1.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--color-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  transition: var(--transition);
}

.btn.primary {
  background: linear-gradient(120deg, var(--color-accent), var(--color-accent-strong));
  color: #f7f9fc;
  border: none;
  box-shadow: 0 10px 24px rgba(15, 158, 168, 0.25);
}

.btn.secondary {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
}

.btn.secondary:hover {
  background: rgba(15, 158, 168, 0.08);
}

.quick-stats {
  display: grid;
  gap: 1.5rem;
  margin: 2.5rem 0 0;
}

.quick-stats dt {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.quick-stats dd {
  margin: 0.3rem 0 0;
  color: var(--color-muted);
}

.hero-visual .gradient-card {
  background: var(--color-surface);
  padding: 2.5rem;
  border-radius: 24px;
  border: 1px solid var(--color-border);
  box-shadow: 0 24px 44px rgba(12, 112, 123, 0.12);
}

.gradient-card span {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

.gradient-card cite {
  display: block;
  margin-top: 1rem;
  font-style: normal;
  color: var(--color-muted);
}

.section-intro {
  max-width: 60ch;
  color: var(--color-muted);
}

.services,
.cert-grid,
.case-studies,
.learning-habits,
.contact-layout,
.faq,
.testimonials {
  padding: clamp(3.5rem, 7vw, 4.75rem) 0;
}

.card-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-top: 2.5rem;
}

.card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 18px 32px rgba(11, 112, 123, 0.08);
}

.card.badge {
  display: grid;
  gap: 1.1rem;
  align-content: start;
}

.card.badge ul {
  margin: 0;
}

.badge-img {
  width: 96px;
  height: auto;
  justify-self: start;
  filter: drop-shadow(0 6px 12px rgba(12, 112, 123, 0.22));
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(11, 112, 123, 0.28);
  box-shadow: 0 22px 42px rgba(11, 112, 123, 0.15);
}

.card ul {
  padding-left: 1.5rem;
  color: var(--color-muted);
}

.approach .split,
.learning-habits .split,
.contact-layout .split {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.contact-cards {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.25rem;
}

.contact-cards article {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 18px;
  border: 1px solid var(--color-border);
  box-shadow: 0 16px 28px rgba(12, 112, 123, 0.08);
}

.contact-cards ul {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: grid;
  gap: 0.5rem;
}

.contact-cards a {
  color: var(--color-accent);
  font-weight: 600;
}

.pillars {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.5rem;
}

.pillars li {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  box-shadow: 0 14px 28px rgba(12, 112, 123, 0.08);
}

.aside-card {
  background: var(--color-surface-alt);
  padding: 2rem;
  border-radius: 18px;
  border: 1px solid var(--color-border);
  box-shadow: inset 0 0 0 1px rgba(15, 158, 168, 0.12);
}

.testimonial-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.testimonial-grid blockquote {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: 20px;
  margin: 0;
  border: 1px solid var(--color-border);
  font-size: 1.05rem;
  box-shadow: 0 18px 32px rgba(12, 112, 123, 0.08);
}

.cta-banner {
  padding: 3rem 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(15, 158, 168, 0.35));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  box-shadow: inset 0 0 0 1px rgba(15, 158, 168, 0.12);
}

.cta-banner .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
}

.site-footer {
  padding: 2rem 0;
  background: rgba(255, 255, 255, 0.92);
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
}

.footer-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.footer-links a {
  opacity: 0.8;
  color: var(--color-accent-strong);
}

.footer-links a:hover {
  opacity: 1;
}

.page-hero {
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.1rem);
  margin-bottom: 1rem;
}

.timeline {
  margin-top: 3rem;
  display: grid;
  gap: 2rem;
}

.timeline article {
  position: relative;
  padding-left: 2.75rem;
}

.timeline-marker {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  background: rgba(15, 158, 168, 0.16);
  position: absolute;
  left: 0;
  top: 0.35rem;
}

.timeline article::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 1.2rem;
  width: 2px;
  height: calc(100% - 1rem);
  background: rgba(15, 158, 168, 0.2);
}

.page-contact .form-card {
  background: var(--color-surface);
  padding: 2.5rem;
  border-radius: 22px;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 40px rgba(12, 112, 123, 0.12);
}

form {
  display: grid;
  gap: 1.5rem;
}

.form-group,
fieldset {
  display: grid;
  gap: 0.6rem;
}

label,
legend {
  font-weight: 600;
  letter-spacing: 0.02em;
}

input,
select,
textarea {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.96);
  color: var(--color-text);
  font-size: 1rem;
  box-shadow: 0 6px 18px rgba(12, 112, 123, 0.08);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(15, 158, 168, 0.22);
}

fieldset label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
  color: var(--color-muted);
}

fieldset input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.small-print {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.accordion details {
  background: var(--color-surface);
  padding: 1.4rem 1.8rem;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  box-shadow: 0 14px 28px rgba(12, 112, 123, 0.08);
}

.accordion summary {
  cursor: pointer;
  font-weight: 600;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion details + details {
  margin-top: 1rem;
}

.site-footer p {
  margin: 0 0 1rem 0;
  color: var(--color-muted);
}

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

@media (max-width: 900px) {
  .main-nav ul {
    position: absolute;
    inset: 100% auto auto 0;
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    display: none;
    flex-direction: column;
    gap: 1rem;
  }

  .main-nav ul[aria-expanded="true"] {
    display: flex;
  }

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

  .primary-header .container {
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .cta {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-banner .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .quick-stats {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }
}