@import url('https://fonts.googleapis.com/css2?family=Cal+Sans&family=Love+Light&family=Playfair+Display:ital,wght@0,400..900;1,400..900&family=Poppins:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

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

:root{
    --bg-dark: #0f172a;
    --accent-1: #00f6ff;
    --accent-2: #7c3aed;
    --accent-3: #ffb347;
    --muted: rgba(255,255,255,0.08);
    --glass: rgba(255,255,255,0.04);
    --card-bg: rgba(255,255,255,0.03);
}

html, body { height: 100%; }
html { text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }

/* Decorative floating blobs and soft texture using pseudo-elements */
body::before,
body::after{
    content: '';
    position: fixed;
    pointer-events: none;
    z-index: 0;
    filter: blur(80px) saturate(120%);
    mix-blend-mode: screen;
    opacity: 0.6;
}

body::before{
    width: 520px;
    height: 520px;
    left: -8%;
    top: -8%;
    background: radial-gradient(circle at 20% 30%, rgba(124,58,237,0.6), transparent 30%), radial-gradient(circle at 80% 80%, rgba(255,126,179,0.35), transparent 25%);
    animation: floatBlob 12s ease-in-out infinite;
}

body::after{
    width: 420px;
    height: 420px;
    right: -6%;
    bottom: -6%;
    background: radial-gradient(circle at 30% 30%, rgba(0,246,255,0.25), transparent 30%), radial-gradient(circle at 70% 70%, rgba(255,179,71,0.18), transparent 25%);
    animation: floatBlob 18s linear infinite reverse;
}

@keyframes floatBlob{
    0%{ transform: translateY(0) scale(1); }
    50%{ transform: translateY(-30px) scale(1.05); }
    100%{ transform: translateY(0) scale(1); }
}

/* Ensure main content layers above decorative blobs */
header, .container, .hero, .courses, footer, .popup { position: relative; z-index: 2; }

/* Subtle global improvements */
img { transition: transform 0.4s ease, box-shadow 0.3s ease; }
img:hover { transform: translateY(-6px) scale(1.02); box-shadow: 0 10px 30px rgba(2,6,23,0.6); }

/* Glassmorphism + soft shadows for cards */
.card-front, .card-back, .instructor-card, .feature-box {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 8px 30px rgba(2,6,23,0.6), inset 0 1px 0 rgba(255,255,255,0.02);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

/* Accent stroke for flipped side */
.card-back { box-shadow: 0 8px 30px rgba(124,58,237,0.12); border: 1px solid rgba(124,58,237,0.12); }

/* Decorative hero accent */
.hero::after{
    content: '';
    position: absolute;
    inset: auto 5% 5% auto;
    width: 240px;
    height: 240px;
    background: conic-gradient(from 180deg at 50% 50%, rgba(124,58,237,0.25), rgba(0,246,255,0.18), rgba(255,179,71,0.12));
    border-radius: 50%;
    filter: blur(36px);
    z-index: 1;
    transform: translateZ(0);
}

/* Logo gradient text */
.nav-logo .logo-text{
    background: linear-gradient(90deg, #fff, rgba(255,255,255,0.9));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

/* Stronger focus & hover for interactive elements */
.nav-link:focus, .nav-link:hover{ outline: none; box-shadow: 0 6px 18px rgba(0,246,255,0.08); }

.newsletter button{
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.newsletter button:hover{ transform: translateY(-4px); box-shadow: 0 8px 20px rgba(255,179,71,0.16); }

/* Slight 3D tilt on hover for course cards */
.course-card:hover .card-inner{ transform: rotateY(180deg) translateY(-6px); box-shadow: 0 20px 40px rgba(2,6,23,0.6); }

/* Footer decorative top line */
.footer::before{
    content: '';
    display: block;
    height: 4px;
    width: 100%;
    background: linear-gradient(90deg, var(--accent-2), var(--accent-1), var(--accent-3));
    opacity: 0.18;
}

/* small screens: reduce blob intensity */
@media (max-width: 768px){
    body::before, body::after { opacity: 0.35; filter: blur(60px); }
    .hero::after { display: none; }
}

body {
    font-family: 'Poppins', sans-serif;
    color: white;
    /* Animated multi-color gradient for an attractive UI background */
    background: linear-gradient(120deg, #0f172a 0%, #1e3a8a 25%, #7c3aed 50%, #ff7eb3 75%, #ffb347 100%);
    background-size: 300% 300%;
    animation: gradientBG 18s ease infinite;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
    padding: 20px 0;
}

/* Header */
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.nav-logo .logo-text {
  font-weight: bold;
  font-size: 1.8rem;
  cursor: pointer;
}

.menu-icon {
  display: none;
  cursor: pointer;
  font-size: 1.6rem;
  color: var(--primary-color);
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-link {
  position: relative;
  text-decoration: none;
  color: white;
  font-weight: 500;
  transition: color 0.3s ease;
  padding: 8px 4px;
}

/* Hover color */
.nav-link:hover {
  color: #00f6ff;
  text-shadow: 0 0 5px #00f6ff, 0 0 10px #00f6ff, 0 0 15px #00f6ff;
}


/* Glowing underline effect */
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: #00f6ff;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 100%;
}

/* Hamburger toggle */
#menu-toggle {
  display: none;
}

#menu-toggle:checked+label+.nav-menu {
  display: block;
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--background-color);
  flex-direction: column;
  padding: 1rem 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
  .menu-icon {
    display: block;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    gap: 1rem;
  }

  .nav-icons {
    display: none;
  }

  .search-box input {
    width: 100%;
  }
}

.hero {
    text-align: center;
    padding: 100px 20px;
    background: rgba(0, 0, 0, 0.5);
}

.courses,
.instructors {
    padding: 60px 20px;
}

.course-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.course-card {
    width: 250px;
    height: 240px;
    perspective: 1000px;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.course-card:hover .card-inner {
    transform: rotateY(180deg);
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    background-color: #1c253b;
    border-radius: 10px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.card-front img {
    width: 200px;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 10px;
}

.card-back {
    transform: rotateY(180deg);
    background-color: #00f6ff;
    color: #000;
}

@media (max-width: 1024px) {
  .course-card {
    width: 220px;
    height: 220px;
  }

  .card-front img {
    width: 180px;
    height: 120px;
  }
}

@media (max-width: 768px) {
  .course-card {
    width: 180px;
    height: 200px;
  }

  .card-front img {
    width: 160px;
    height: 100px;
  }

  .card-front h4, .card-back p {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .course-list {
    flex-direction: column;
    align-items: center;
  }

  .course-card {
    width: 90%;
    height: 220px;
  }

  .card-front img {
    width: 100%;
    height: 140px;
  }

  .card-front h4, .card-back p {
    font-size: 16px;
  }
}


.instructor-card {
    background-color: #1c253b;
    padding: 20px;
    border-radius: 10px;
    width: 300px;
    text-align: center;
    transition: transform 0.3s ease;
}

.instructor-card:hover {
    transform: translateY(-10px);
}

.popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #1c253b;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px #00f6ff;
    z-index: 1000;
    width: 90%;
    max-width: 400px;
}

#enroll-toggle:checked~.overlay,
#enroll-toggle:checked~.popup {
    display: block;
}

.popup input {
    padding: 10px;
    margin: 10px 0;
    width: 100%;
    border: none;
    border-radius: 5px;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
}

footer {
    text-align: center;
    padding: 20px 0;
    background-color: #1b2238;
    font-size: 14px;
}

@media(max-width: 768px) {

    .course-card,
    .instructor-card {
        width: 90%;
        height: auto;
    }
}

/* Keyframes */
@keyframes fadeSlide {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Base Hero Styles */
.hero {
    background-image: url('./assets/hero\ section.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #fff;
    position: relative;
    text-align: center;
    padding: 100px 20px;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

/* Heading and Paragraph */
.fade-slide {
    opacity: 0;
    animation: fadeSlide 1s ease-out forwards;
}

.fade-slide.delay {
    animation-delay: 0.5s;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 70px 20px;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }
}


/* Why Choose Us Section */
.why-choose-us {
    padding: 60px 20px;
    background-color: #1b2238;
    border-top: 2px solid #00f6ff;
    border-bottom: 2px solid #00f6ff;
    margin-top: 40px;
    border-radius: 10px;
}

.why-choose-us h3 {
    color: #00f6ff;
    font-size: 32px;
    text-align: center;
    margin-bottom: 40px;
}

.features {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
}

.feature-box {
    background-color: #2a3352;
    border: 1px solid #00f6ff60;
    padding: 30px;
    border-radius: 12px;
    width: 300px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-box:hover {
    transform: translateY(-10px);
    box-shadow: 0 0 15px #00f6ff60;
}


.feature-box img {
    margin-bottom: 20px;
    border-radius: 50px;
    filter: drop-shadow(0 0 5px #00f6ff90);
}

.feature-box h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #00f6ff;
}

.feature-box p {
    font-size: 15px;
    color: #cfd8ff;
}

/* Responsive */
@media (max-width: 768px) {
    .features {
        flex-direction: column;
        align-items: center;
    }

    .feature-box {
        width: 90%;
    }
}


.footer {
    background-color: #1e1e2f;
    color: #fff;
    padding: 3rem 1rem 1rem;
    font-size: 0.9rem;
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
    max-width: 1200px;
    margin: auto;
}

.footer-left,
.footer-links,
.footer-newsletter {
    flex: 1 1 250px;
}

.footer-left h2 {
    font-size: 1.5rem;
    color: #ffb347;
    margin-bottom: 0.5rem;
}

.tagline {
    font-style: italic;
    margin-bottom: 1rem;
    color: #ccc;
}

.social-icons {
    display: flex;
    gap: 0.8rem;
}

.social-icons a {
    font-size: 1.2rem;
    color: #fff;
    transition: transform 0.3s ease, color 0.3s ease;
}

.social-icons a:hover {
    transform: scale(1.2);
    color: #ffb347;
}

.footer-links h3,
.footer-newsletter h3 {
    margin-bottom: 0.5rem;
    color: #ffb347;
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links ul li a {
    color: #ccc;
    text-decoration: none;
}

.footer-links ul li a:hover {
    color: #fff;
    text-decoration: underline;
}

.newsletter {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.newsletter input {
    padding: 0.5rem;
    border-radius: 4px;
    border: none;
}

.newsletter button {
    padding: 0.5rem;
    border: none;
    border-radius: 4px;
    background-color: #ffb347;
    color: #1e1e2f;
    font-weight: bold;
    cursor: pointer;
}

.newsletter button:hover {
    background-color: #ffc76b;
}

.back-to-top {
    display: inline-block;
    margin-top: 1rem;
    color: #ffb347;
    text-decoration: none;
    font-weight: bold;
}

.back-to-top:hover {
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid #333;
    margin-top: 2rem;
}

.footer-bottom span {
    color: #ffb347;
}

/* Responsive */
@media (max-width: 768px) {
    .footer-container {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .footer-left,
    .footer-links,
    .footer-newsletter {
        flex: 1 1 100%;
    }
}