:root {
  --primary: #2563eb;
  --accent: #ff7a00;
  --gray: #f4f6fb;
  --text: #222;
  --white: #fff;
  --shadow: 0 2px 8px rgba(0,0,0,0.04);
  --radius: 12px;
  --transition: 0.3s cubic-bezier(.4,0,.2,1);
  --font-main: 'Poppins', Arial, sans-serif;
}

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

body {
  font-family: var(--font-main);
  color: var(--text);
  background: var(--gray);
  margin: 0;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.navbar {
  position: sticky;
  top: 0;
  background: var(--white);
  box-shadow: var(--shadow);
  z-index: 100;
  width: 100%;
}

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

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary);
  letter-spacing: 1px;
}
.logo .accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a:focus {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

.hero {
  background: linear-gradient(90deg, var(--primary) 60%, var(--accent) 100%);
  color: var(--white);
  padding: 80px 0 60px 0;
  text-align: center;
  animation: fadeIn 1s;
}
.hero-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.tagline {
  font-size: 1.25rem;
  margin-bottom: 2rem;
}
.cta-btn {
  background: var(--accent);
  color: var(--white);
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
  display: inline-block;
}
.cta-btn:hover,
.cta-btn:focus {
  background: var(--primary);
  transform: translateY(-2px) scale(1.05);
}

.about {
  background: var(--white);
  padding: 60px 0;
  animation: fadeInUp 1s;
}
.about-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.highlights {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  padding: 0;
  list-style: none;
}
.highlights li {
  background: var(--gray);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 500;
  box-shadow: var(--shadow);
}

.courses {
  padding: 60px 0;
}
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.course-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  animation: fadeInUp 1s;
}
.course-card:hover,
.course-card:focus {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 4px 16px rgba(37,99,235,0.08);
  border: 1.5px solid var(--primary);
}
.course-card h3 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.why {
  background: var(--gray);
  padding: 60px 0;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.why-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1rem;
  text-align: center;
  animation: fadeInUp 1s;
}
.why-card img {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
}
.why-card h3 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.portfolio {
  padding: 60px 0;
}
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.portfolio-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1rem;
  text-align: center;
  animation: fadeInUp 1s;
}
.portfolio-card img {
  width: 100%;
  max-width: 220px;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}
.portfolio-card blockquote {
  font-style: italic;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.portfolio-card cite {
  font-size: 0.95rem;
  color: #555;
}

.gallery {
  background: var(--white);
  padding: 60px 0;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.gallery-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
.gallery-img:hover,
.gallery-img:focus {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(37,99,235,0.08);
  outline: 2px solid var(--primary);
}
.lightbox {
  display: none;
  position: fixed;
  z-index: 200;
  left: 0; top: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.lightbox.active {
  display: flex;
}
.lightbox-img {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.lightbox .close {
  color: var(--white);
  font-size: 2rem;
  position: absolute;
  top: 32px;
  right: 48px;
  cursor: pointer;
  background: none;
  border: none;
}

.contact {
  background: var(--gray);
  padding: 60px 0;
}
.contact-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.contact-grid {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}
.contact-info {
  flex: 1 1 320px;
  margin-bottom: 2rem;
}
.map-responsive {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-top: 1rem;
}
.contact-form {
  flex: 1 1 320px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.contact-form label {
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.contact-form input,
.contact-form textarea {
  padding: 0.75rem;
  border-radius: var(--radius);
  border: 1px solid #ddd;
  font-size: 1rem;
  font-family: var(--font-main);
  resize: vertical;
}
.contact-form textarea {
  min-height: 100px;
}
.contact-form button {
  align-self: flex-start;
}
.form-msg {
  color: var(--accent);
  font-weight: 600;
  margin-top: 0.5rem;
}

.footer {
  background: var(--primary);
  color: var(--white);
  padding: 32px 0 16px 0;
  text-align: center;
}
.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.footer-links {
  display: flex;
  gap: 2rem;
}
.footer-links a {
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition);
}
.footer-links a:hover,
.footer-links a:focus {
  color: var(--accent);
}
.footer-social {
  display: flex;
  gap: 1rem;
}
.footer-social img {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
  transition: filter var(--transition);
}
.footer-social a:hover img,
.footer-social a:focus img {
  filter: brightness(1) invert(0.2) sepia(1) hue-rotate(-30deg) saturate(5);
}
.footer-copy {
  font-size: 0.95rem;
  margin-top: 1rem;
}

.sticky-inquiry {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sticky-inquiry a {
  background: #06fe4e;
  border-radius: 50%;
  box-shadow: var(--shadow);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}
.sticky-inquiry a:hover,
.sticky-inquiry a:focus {
  background: var(--accent);
  transform: scale(1.1);
}
.sticky-inquiry img {
  width: 28px;
  height: 28px;
}

@media (max-width: 900px) {
  .container { max-width: 98vw; }
  .nav-links { gap: 1rem; }
  .courses-grid, .why-grid, .portfolio-grid, .gallery-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
  }
  .contact-grid { flex-direction: column; }
}

@media (max-width: 600px) {
  .nav-content { height: auto; flex-direction: column; align-items: flex-start; }
  .nav-links {
    flex-direction: column;
    gap: 0.5rem;
    background: var(--white);
    position: absolute;
    top: 64px; left: 0; right: 0;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.active { display: flex; }
  .nav-toggle { display: flex; }
  .sticky-inquiry { bottom: 16px; right: 16px; }
  .footer-content { gap: 0.5rem; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-20px);}
  to { opacity: 1; transform: translateY(0);}
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px);}
  to { opacity: 1; transform: translateY(0);}
}