/* Root & base */

:root {
  --navy: #0b1b33;
  --navy-soft: #152746;
  --gold: #d3a93b;
  --gold-soft: #f3d17d;
  --bg: #050814;
  --bg-alt: #0e1729;
  --light: #f9fafb;
  --muted: #a1a9ba;
  --border-soft: #2a3550;
  --radius-card: 14px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
}

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

/* Layout helpers */

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

.section {
  padding: 4.2rem 0;
}

.section-alt {
  background: radial-gradient(circle at top left, #1c2a4a 0, #050814 45%, #050814 100%);
}

.section-header {
  max-width: 720px;
}

.section-header h2 {
  margin: 0 0 0.75rem;
  font-size: 2rem;
}

.section-header p {
  margin: 0;
  color: var(--muted);
}

/* Header & nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 8, 20, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(67, 86, 126, 0.7);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--light);
}

.logo img {
  height: 44px;
  width: auto;
  display: block;
}

.logo-text {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--gold-soft);
}

.main-nav ul {
  display: flex;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
}

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

.main-nav a:hover::before,
.main-nav a:focus-visible::before {
  width: 100%;
  color: var(--light);
}

/* 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: rgba(5, 8, 20, 0.9);
  cursor: pointer;
  padding: 0.35rem;
}

.nav-toggle span {
  height: 2px;
  width: 100%;
  background-color: var(--light);
  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 {
  position: relative;
  padding: 5.2rem 0 4rem;
  background: radial-gradient(circle at top, #1e315b 0, #050814 55%, #050814 100%);
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: -120px;
  background: radial-gradient(circle at 10% 20%, rgba(211, 169, 59, 0.16), transparent 55%),
    radial-gradient(circle at 80% 0, rgba(67, 168, 255, 0.18), transparent 55%);
  opacity: 0.9;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.2fr);
  gap: 2.7rem;
  align-items: center;
}

.hero-copy h1 {
  margin-top: 0;
  margin-bottom: 0.9rem;
  font-size: clamp(2.2rem, 4vw, 2.9rem);
}

.hero-copy p {
  margin: 0;
  color: var(--muted);
  max-width: 32rem;
}

.hero-actions {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-meta {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.hero-meta span {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background-color: rgba(11, 27, 51, 0.84);
  border: 1px solid rgba(211, 169, 59, 0.25);
}

.hero-media {
  display: grid;
  gap: 0.9rem;
  align-items: center;
}

.hero-image-main img {
  width: 100%;
  max-width: 420px;
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
  display: block;
  object-fit: cover;
}

.hero-image-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.hero-image-stack img {
  width: 100%;
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  display: block;
  object-fit: cover;
  max-height: 150px;
}

.scroll-down {
  position: absolute;
  left: 50%;
  bottom: 0.9rem;
  transform: translateX(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.96rem;
  font-weight: 600;
  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(--gold), var(--gold-soft));
  color: #050814;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 55px rgba(0, 0, 0, 0.7);
}

.btn-outline {
  background: transparent;
  color: var(--gold-soft);
  border-color: rgba(211, 169, 59, 0.7);
}

.btn-outline:hover {
  background-color: rgba(211, 169, 59, 0.14);
}

/* About */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.1fr);
  gap: 2.4rem;
  align-items: center;
}

.about-text p {
  color: var(--muted);
}

.about-highlight {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.stat {
  flex: 1 1 120px;
  padding: 0.8rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border-soft);
  background: radial-gradient(circle at top left, #233154, #0b1425);
}

.stat-number {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gold-soft);
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
}

.about-image-card {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  background: radial-gradient(circle at top, #27365b, #050814);
}

.about-image-card img {
  display: block;
  width: 100%;
  object-fit: cover;
  max-height: 220px;
}

/* Course filters */

.course-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.7rem 0 1.5rem;
}

.filter-btn {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: rgba(14, 23, 41, 0.9);
  color: var(--muted);
  font-size: 0.88rem;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    transform 0.1s ease;
}

.filter-btn.active {
  background: rgba(211, 169, 59, 0.16);
  border-color: rgba(211, 169, 59, 0.7);
  color: var(--gold-soft);
  transform: translateY(-1px);
}

/* Courses */

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.course-card {
  position: relative;
  padding: 1.2rem 1.15rem 1.2rem;
  border-radius: var(--radius-card);
  background: radial-gradient(circle at top left, #27365b, #0b1425);
  border: 1px solid rgba(211, 169, 59, 0.2);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  overflow: hidden;
}

.course-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 2px solid transparent;
  background: linear-gradient(135deg, rgba(211, 169, 59, 0.9), transparent 55%) border-box;
  mask: linear-gradient(#000 0 0) padding-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.course-card:hover::before {
  opacity: 1;
}

.course-tag {
  align-self: flex-start;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  padding: 0.24rem 0.6rem;
  border-radius: 999px;
  background-color: rgba(5, 8, 20, 0.8);
  border: 1px solid rgba(211, 169, 59, 0.5);
  color: var(--gold-soft);
}

.course-card h3 {
  margin: 0;
  font-size: 1.02rem;
}

.course-card p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--muted);
}

.course-toggle {
  align-self: flex-start;
  margin-top: 0.25rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px dashed rgba(211, 169, 59, 0.65);
  background: transparent;
  color: var(--gold-soft);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.course-more {
  margin-top: 0.35rem;
  border-top: 1px dashed rgba(67, 86, 126, 0.8);
  padding-top: 0.45rem;
  display: none;
}

.course-more ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.86rem;
  color: var(--muted);
}

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

/* Gallery */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.gallery-item {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  background: radial-gradient(circle at top, #27365b, #050814);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.gallery-item img {
  width: 100%;
  display: block;
  max-height: 220px;
  object-fit: cover;
}

.gallery-item figcaption {
  padding: 0.8rem 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Locations */

.locations-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.location-card {
  border-radius: var(--radius-card);
  background: radial-gradient(circle at top left, #27365b, #0b1425);
  border: 1px solid var(--border-soft);
  padding: 1.1rem 1.2rem;
}

.location-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.location-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.6rem;
  row-gap: 0.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.location-card dt {
  font-weight: 600;
  color: var(--gold-soft);
}

.location-card dd {
  margin: 0;
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.2fr);
  gap: 2.4rem;
  align-items: flex-start;
}

.contact-info p {
  color: var(--muted);
}

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

.contact-form-wrapper {
  border-radius: 18px;
  border: 1px solid var(--border-soft);
  background: radial-gradient(circle at top, #27365b, #050814);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5);
  padding: 1.4rem 1.5rem;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.9rem;
}

.form-row label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.form-row input,
.form-row textarea {
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background-color: rgba(5, 8, 20, 0.85);
  color: var(--light);
  padding: 0.55rem 0.75rem;
  font: inherit;
  outline: none;
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: rgba(211, 169, 59, 0.9);
  box-shadow: 0 0 0 1px rgba(211, 169, 59, 0.5);
}

.form-note {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  color: var(--muted);
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(67, 86, 126, 0.7);
  padding: 1.2rem 0;
  background-color: #050814;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--muted);
  gap: 0.6rem;
}

.back-to-top {
  color: var(--gold-soft);
  text-decoration: none;
}

/* Reveal on scroll */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */

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

  .hero-media {
    order: -1;
  }

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

  .hero-image-stack {
    max-width: 420px;
    margin-inline: auto;
  }

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

  .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: rgba(5, 8, 20, 0.97);
    border-bottom: 1px solid rgba(67, 86, 126, 0.7);
    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: 0.8rem 1.5rem 1rem;
  }

  .main-nav.open {
    opacity: 1;
    pointer-events: