/* Base styles */

:root {
  --primary: #005a9c;
  --primary-light: #00b5c9;
  --primary-dark: #003b63;
  --bg-light: #f6f8fb;
  --text-main: #1f2933;
  --text-muted: #6b7280;
  --border-soft: #d1d5db;
  --radius-card: 12px;
  --shadow-soft: 0 6px 18px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
  background-color: #ffffff;
  line-height: 1.6;
}

/* Layout helpers */

.container {
  width: min(1120px, 100% - 2.5rem);
  margin: 0 auto;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: var(--bg-light);
}

.section h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 2rem;
}

.section-intro {
  margin-bottom: 2rem;
  max-width: 720px;
  color: var(--text-muted);
}

/* Header & navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: #ffffff;
  border-bottom: 1px solid rgba(209, 213, 219, 0.7);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-main);
  gap: 0.5rem;
}

.logo img {
  height: 42px;
  width: auto;
  display: block;
}

.logo-text {
  font-weight: 700;
  font-size: 1.05rem;
}

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

.main-nav a {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.98rem;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transition: width 0.2s ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  width: 100%;
}

/* Mobile nav toggle */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 0.25rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background-color: #ffffff;
  cursor: pointer;
  padding: 0.35rem;
}

.nav-toggle span {
  height: 2px;
  width: 100%;
  background-color: var(--text-main);
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease, translate 0.2s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg);
  translate: 0 5px;
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg);
  translate: 0 -5px;
}

/* Hero */

.hero {
  padding: 4rem 0 3.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.2fr);
  gap: 2.5rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  margin-top: 0;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.02rem;
  color: var(--text-muted);
  max-width: 36rem;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image img {
  width: 100%;
  max-width: 420px;
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
  display: block;
  object-fit: cover;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease,
    color 0.15s ease, border-color 0.15s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #ffffff;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.18);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.22);
}

.btn.ghost {
  background-color: #ffffff;
  color: var(--primary-dark);
  border-color: var(--border-soft);
}

.btn.ghost:hover {
  background-color: var(--bg-light);
}

.btn.secondary {
  background-color: #ffffff;
  border-color: var(--primary);
  color: var(--primary-dark);
}

.btn.secondary:hover {
  background-color: var(--primary);
  color: #ffffff;
}

/* Courses */

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.course-card {
  background-color: #ffffff;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-soft);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
  overflow: hidden;
}

.course-header {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1rem;
  cursor: pointer;
}

.course-header h3 {
  margin: 0;
  font-size: 1rem;
}

.course-toggle-indicator {
  font-size: 1.4rem;
  color: var(--primary);
  transition: transform 0.2s ease;
}

.course-card.open .course-toggle-indicator {
  transform: rotate(45deg); /* + becomes x */
}

.course-body {
  padding: 0 1.1rem 1rem;
  border-top: 1px solid var(--border-soft);
  display: none;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.course-card.open .course-body {
  display: block;
}

/* Vacancies */

.vacancies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.vacancy-card {
  background-color: #ffffff;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-soft);
  padding: 1.2rem 1.3rem 1.4rem;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.vacancy-card h3 {
  margin: 0;
}

.vacancy-card p {
  margin: 0;
  color: var(--text-muted);
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.5fr);
  gap: 2rem;
  align-items: flex-start;
}

.contact-email a {
  font-weight: 600;
  color: var(--primary-dark);
}

.locations {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.location-card {
  background-color: #ffffff;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-soft);
  padding: 1rem 1.1rem;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
  font-size: 0.95rem;
}

.location-card h4 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(209, 213, 219, 0.7);
  padding: 1.2rem 0;
  background-color: #ffffff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  gap: 1rem;
}

.back-to-top {
  text-decoration: none;
  color: var(--primary-dark);
  font-weight: 500;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-image {
    order: -1;
    text-align: center;
  }

  .hero-image img {
    margin-inline: auto;
  }

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

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: #ffffff;
    border-bottom: 1px solid rgba(209, 213, 219, 0.6);
    box-shadow: 0 10px 18px rgba(15, 23, 42, 0.06);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1.4rem 1rem;
    gap: 0.75rem;
  }

  .main-nav.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .hero {
    padding-top: 3rem;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}