* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: black;
  color: white;
  overflow-x: hidden;
}

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

.container {
  width: min(1200px, 90%);
  margin: auto;
}

.narrow {
  max-width: 900px;
}

.center {
  text-align: center;
}

section {
  position: relative;
}


/* FLOATING BAR */

.floating-bar {
  position: fixed;
  top: -100px;
  left: 0;
  width: 100%;
  z-index: 999;
  transition: 0.4s ease;
  padding: 1rem 2rem;
}

.floating-bar.visible {
  top: 0;
}

.floating-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(10px);
  padding: 1rem 1.5rem;
  border-radius: 100px;
}


/* HERO */

.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('assets/images/hero.jpg');
  background-size: cover;
  background-position: center;
  transform: scale(1.1);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-family: 'Andong Katuri', cursive;
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: 0.95;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}




/* BUTTONS */

.btn {
  display: inline-block;
  background: #dfff35;
  color: black;
  text-decoration: none;
  padding: 1rem 1.5rem;
  border-radius: 100px;
  font-weight: 700;
  transition: 0.3s ease;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  border: 2px solid white;
  color: white;
}

.btn-small {
  padding: 0.75rem 1.2rem;
}


/* INTRO */

.intro {
  padding: 8rem 0;
  background: #081f23;
}

.intro-logo {
  max-width: 280px;
  margin: auto auto 4rem;
}

.intro-text {
  text-align: center;
}

.intro-text h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: 2rem;
}

.intro-text p {
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.intro-image {
  margin-top: 5rem;
  border-radius: 30px;
  overflow: hidden;
}


/* ABOUT */

.about-section {
  padding: 8rem 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  width: min(1400px, 92%);
  margin: auto;
}

.about-content h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: 2rem;
}

.about-content p {
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.sticky-image {
  position: sticky;
  top: 4rem;
}

.about-image img {
  border-radius: 30px;
}


/* COURSE SECTIONS */

.course-section {
    position: relative;
    min-height: 160vh;
}

.course-image-wrap {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.course-image {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.08);
}

.course-panel {
    position: relative;
    z-index: 5;

    width: min(430px, 90%);

    margin-left: 5vw;

    margin-top: 20vh;
    margin-bottom: 20vh;

    background: rgba(0,0,0,0.50);
    backdrop-filter: blur(6px);

    padding: 4rem;

    border-radius: 30px;

    border: 1px solid rgba(255,255,255,0.08);

    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.course-badge {
  display: inline-block;
  background: #dfff35;
  color: black;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.course-panel h2 {
  font-family: 'Andong Katuri', cursive;
  font-size: clamp(3rem, 6vw, 5rem);
  line-height: 0.95;
  margin-bottom: 2rem;
}

.course-panel p {
  line-height: 1.8;
  margin-bottom: 2rem;
}

.course-highlight {
  color: #dfff35;
  font-weight: 700;
  margin-bottom: 2rem;
  font-size: 1.15rem;
}

.course-price {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
}


/* CONTACT */

.contact-section {
  padding: 8rem 0;
  background: #081f23;
}

.contact-section h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: 1rem;
}

.contact-section p {
  margin-bottom: 3rem;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}


/* FOOTER */

.footer {
  background: black;
  padding: 2rem;
}

.footer-inner {
  width: min(1200px, 90%);
  margin: auto;

  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer a {
  color: white;
  text-decoration: none;
}


/* ANIMATIONS */

.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: 1s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}


/* MOBILE */

@media (max-width: 900px) {

  .about-grid {
    grid-template-columns: 1fr;
  }

  .course-image {
    position: relative;
    height: 65vh;
  }

  .course-image-wrap {
    position: relative;
  }

  .course-panel {
    width: calc(100% - 2rem);
    margin: -6rem auto 2rem;
    padding: 2rem;
  }

  .hero h1 {
    font-size: 4rem;
  }

  .floating-inner {
    border-radius: 20px;
  }
}



/* BRAND INTRO */

.brand-intro {
  background: #041417;
  padding: 8rem 0 10rem;
  overflow: hidden;
}

.brand-container {
  width: min(1400px, 90%);
  margin: auto;

  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 6rem;
  align-items: center;
}

.brand-logo img {
  max-width: 650px;
  width: 100%;
}

.brand-text {
  max-width: 700px;
}

.brand-text h2 {
  color: #79ff2b;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 2rem;
  font-weight: 700;
}

.brand-text p {
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 3rem;
  color: rgba(255,255,255,0.92);
}

.brand-image {
  width: min(1200px, 92%);
  margin: 6rem auto 0;
}

.brand-image img {
  width: 100%;
  border-radius: 30px;
  display: block;
}



/* SCIENTIST SECTION */

.scientist-section {
  background: #081f23;
  padding: 8rem 0;
}

.scientist-section h2 {
  font-size: clamp(2.5rem, 5vw, 5rem);
  margin-bottom: 2rem;
}

.scientist-section p {
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.scientist-section .intro-image {
  margin-top: 5rem;
  border-radius: 30px;
  overflow: hidden;
}



/* MOBILE */

@media (max-width: 900px) {

  .brand-container {
    grid-template-columns: 1fr;
    gap: 4rem;
  }

  .brand-logo img {
    max-width: 420px;
  }

  .brand-text {
    max-width: 100%;
  }

  .brand-image {
    margin-top: 4rem;
  }
}