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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #e0e0e0;
    background: #0a0e27;
    overflow-x: hidden;
    position: relative;
}

/* Comets Background Animation */
.comets-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.comet {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #64a0ff;
    border-radius: 50%;
    box-shadow: 0 0 4px 1px rgba(100, 160, 255, 0.8),
                0 0 8px 2px rgba(100, 160, 255, 0.4);
    opacity: 0;
}

.comet::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(100, 160, 255, 0.6));
    top: 50%;
    left: -20px;
    transform: translateY(-50%);
}

.comet1 {
    top: 10%;
    left: -10px;
    animation: cometFly1 12s linear infinite;
    animation-delay: 0s;
}

.comet2 {
    top: 30%;
    left: -10px;
    animation: cometFly2 15s linear infinite;
    animation-delay: 2s;
}

.comet3 {
    top: 50%;
    left: -10px;
    animation: cometFly3 18s linear infinite;
    animation-delay: 4s;
}

.comet4 {
    top: 70%;
    left: -10px;
    animation: cometFly4 14s linear infinite;
    animation-delay: 1s;
}

.comet5 {
    top: 20%;
    right: -10px;
    animation: cometFly5 16s linear infinite;
    animation-delay: 3s;
}

.comet6 {
    top: 60%;
    right: -10px;
    animation: cometFly6 13s linear infinite;
    animation-delay: 5s;
}

@keyframes cometFly1 {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(calc(100vw + 20px)) translateY(100px);
    }
}

@keyframes cometFly2 {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(calc(100vw + 20px)) translateY(-80px);
    }
}

@keyframes cometFly3 {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(calc(100vw + 20px)) translateY(120px);
    }
}

@keyframes cometFly4 {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(calc(100vw + 20px)) translateY(-100px);
    }
}

@keyframes cometFly5 {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(calc(-100vw - 20px)) translateY(90px);
    }
}

@keyframes cometFly6 {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(calc(-100vw - 20px)) translateY(-110px);
    }
}

/* Header & Navigation */
header {
    position: relative;
    z-index: 100;
    background:
        radial-gradient(circle at 10% -10%, rgba(120, 164, 255, 0.35), transparent 60%),
        radial-gradient(circle at 90% 120%, rgba(163, 120, 255, 0.25), transparent 60%),
        linear-gradient(135deg, #050814 0%, #0f1419 60%, #050814 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
    border-bottom: 1px solid rgba(100, 150, 255, 0.2);
    transition: background 0.3s;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: linear-gradient(120deg, #e5f4ff 0%, #64a0ff 40%, #9b7fff 70%, #ffd6ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 18px rgba(100, 150, 255, 0.6);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 5px;
    z-index: 1001;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

nav ul,
.nav-menu {
    list-style: none;
    display: flex;
    gap: 1.8rem;
    align-items: center;
}

.nav-login-btn {
    padding: 8px 18px;
    border-radius: 30px;
    border: 1px solid rgba(100, 150, 255, 0.4);
    background: radial-gradient(circle at 10% 0, rgba(255,255,255,0.3), transparent 55%),
                linear-gradient(135deg, #4a90e2 0%, #7b68ee 100%);
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease, filter 0.2s ease;
}

.nav-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(100, 150, 255, 0.45);
    background: linear-gradient(135deg, #5aa0f2 0%, #8b78fe 100%);
}

.nav-login-btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(100, 150, 255, 0.25);
}

nav a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s, background 0.3s, box-shadow 0.3s, transform 0.2s;
    position: relative;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 12%;
    width: 76%;
    height: 2px;
    background: radial-gradient(circle, #9b7fff 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}

nav a:hover::after {
    opacity: 1;
}

nav a:hover {
    opacity: 1;
    background: rgba(16, 62, 120, 0.55);
    box-shadow: 0 0 18px rgba(100, 150, 255, 0.45);
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0f1419 100%);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(100, 150, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(150, 100, 255, 0.1) 0%, transparent 50%);
    color: white;
    padding: 150px 2rem 100px;
    text-align: center;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
    transition: filter 0.3s ease;
}

/* Animated Stars Background */
.stars,
.stars2,
.stars3 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.stars {
    background-image: 
        radial-gradient(2px 2px at 20% 30%, #fff, transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 50% 50%, #fff, transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(255,255,255,0.6), transparent),
        radial-gradient(2px 2px at 90% 60%, #fff, transparent),
        radial-gradient(1px 1px at 33% 85%, rgba(255,255,255,0.7), transparent),
        radial-gradient(2px 2px at 10% 50%, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 70% 20%, #fff, transparent);
    background-repeat: repeat;
    background-size: 200% 200%;
    animation: sparkle 20s linear infinite;
    opacity: 0.6;
}

.stars2 {
    background-image: 
        radial-gradient(1px 1px at 40% 20%, #64a0ff, transparent),
        radial-gradient(1px 1px at 25% 80%, rgba(100,150,255,0.8), transparent),
        radial-gradient(2px 2px at 75% 40%, #9b7fff, transparent),
        radial-gradient(1px 1px at 15% 60%, rgba(155,127,255,0.6), transparent),
        radial-gradient(1px 1px at 85% 90%, #64a0ff, transparent);
    background-repeat: repeat;
    background-size: 250% 250%;
    animation: sparkle 25s linear infinite reverse;
    opacity: 0.4;
}

.stars3 {
    background-image: 
        radial-gradient(1px 1px at 50% 50%, rgba(255,255,255,0.9), transparent),
        radial-gradient(1px 1px at 30% 40%, rgba(255,255,255,0.5), transparent),
        radial-gradient(2px 2px at 60% 80%, rgba(255,255,255,0.7), transparent);
    background-repeat: repeat;
    background-size: 300% 300%;
    animation: sparkle 30s linear infinite;
    opacity: 0.3;
}

@keyframes sparkle {
    from { transform: translateY(0) translateX(0); }
    to { transform: translateY(-100%) translateX(-50%); }
}

/* Floating Planets */
.floating-planet {
    position: absolute;
    font-size: 3rem;
    opacity: 0.4;
    pointer-events: none;
    animation: float 15s ease-in-out infinite;
}

.planet1 {
    top: 15%;
    left: 8%;
    animation-delay: 0s;
}

.planet2 {
    bottom: 20%;
    right: 10%;
    font-size: 2.5rem;
    animation-delay: 3s;
    animation-duration: 18s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0.3;
    }
    25% {
        transform: translate(20px, -30px) rotate(5deg);
        opacity: 0.5;
    }
    50% {
        transform: translate(-15px, -50px) rotate(-5deg);
        opacity: 0.4;
    }
    75% {
        transform: translate(25px, -20px) rotate(3deg);
        opacity: 0.5;
    }
}

/* Orbiting Satellite */
.orbiting-satellite {
    position: absolute;
    font-size: 1.8rem;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0.5;
    animation: orbit 20s linear infinite;
    transform-origin: center;
}

@keyframes orbit {
    from {
        transform: translate(-50%, -50%) rotate(0deg) translateX(200px) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg) translateX(200px) rotate(-360deg);
    }
}

/* Twinkling effect for stars */
@keyframes twinkle {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.2); }
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
    background: linear-gradient(135deg, #ffffff 0%, #64a0ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(135deg, #4a90e2 0%, #7b68ee 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 1s ease 0.4s both;
    border: 1px solid rgba(100, 150, 255, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(100, 150, 255, 0.4);
    background: linear-gradient(135deg, #5aa0f2 0%, #8b78fe 100%);
}

/* Sections */
section {
    padding: 80px 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #e0e0e0;
    text-shadow: 0 0 20px rgba(100, 150, 255, 0.3);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(135deg, #64a0ff 0%, #9b7fff 100%);
    border-radius: 2px;
}

/* Features Grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: linear-gradient(135deg, #1a1f3a 0%, #0f1419 100%);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.5);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(100, 150, 255, 0.2);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(100, 150, 255, 0.3);
    border-color: rgba(100, 150, 255, 0.5);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #64a0ff;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #b0b0b0;
}

/* Courses Section */
.courses {
    background: #0f1419;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.course-card {
    background: linear-gradient(135deg, #1a1f3a 0%, #0f1419 100%);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid rgba(100, 150, 255, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #64a0ff 0%, #9b7fff 100%);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.course-card:hover::before {
    transform: scaleX(1);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(100, 150, 255, 0.3);
    border-color: rgba(100, 150, 255, 0.5);
}

.course-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.course-card h3 {
    color: #64a0ff;
    margin-bottom: 0.5rem;
}

.course-card p {
    color: #b0b0b0;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.course-link {
    color: #64a0ff;
    text-decoration: none;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap 0.3s;
}

.course-link:hover {
    gap: 10px;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: linear-gradient(135deg, #1a1f3a 0%, #0f1419 100%);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid rgba(100, 150, 255, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(100, 150, 255, 0.3);
    border-color: rgba(100, 150, 255, 0.5);
}

.project-title {
    color: #64a0ff;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.project-description {
    color: #b0b0b0;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: rgba(100, 150, 255, 0.2);
    color: #64a0ff;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    border: 1px solid rgba(100, 150, 255, 0.3);
}

.project-link {
    color: #64a0ff;
    text-decoration: none;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap 0.3s;
}

.project-link:hover {
    gap: 10px;
}

/* Auth Modal */
.auth-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(1, 4, 15, 0.75);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 2000;
}

.auth-modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.auth-modal {
    background: linear-gradient(145deg, #101528 0%, #050814 100%);
    border-radius: 16px;
    padding: 2.2rem 2.4rem;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.7);
    border: 1px solid rgba(100, 150, 255, 0.35);
    position: relative;
}

.auth-modal-close {
    position: absolute;
    top: 12px;
    right: 14px;
    background: transparent;
    border: none;
    color: #9fa8ff;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px;
}

.auth-title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.auth-modal-body {
    margin-top: 0.5rem;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form label {
    display: block;
    margin: 0.6rem 0 0.3rem;
    color: #cfd5ff;
    font-size: 0.95rem;
}

.auth-form input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid rgba(100, 150, 255, 0.3);
    background: rgba(255, 255, 255, 0.03);
    color: #e0e0e0;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.auth-form input:focus {
    outline: none;
    border-color: rgba(100, 150, 255, 0.7);
    box-shadow: 0 0 0 3px rgba(100, 150, 255, 0.2);
}

.form-note {
    margin-top: 1rem;
    color: #a5acc7;
    font-size: 0.95rem;
}

.form-note a {
    color: #64a0ff;
    text-decoration: none;
}

.form-note a:hover {
    text-decoration: underline;
}

.link-button {
    display: inline-flex;
    align-items: center;
    border: none;
    outline: none;
    background: rgba(58, 100, 166, 0.12);
    color: #7da8ff;
    padding: 4px 10px;
    margin-left: 6px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, transform 0.1s ease;
}

.link-button:hover {
    background: rgba(58, 100, 166, 0.25);
    color: #aecdff;
    transform: translateY(-1px);
}

.link-button:active {
    transform: translateY(0);
    background: rgba(58, 100, 166, 0.35);
}

.cta-button.full {
    width: 100%;
    text-align: center;
    margin-top: 1.2rem;
}

/* About Section */
.about {
    background: radial-gradient(circle at top left, rgba(100, 150, 255, 0.12), transparent 55%),
                radial-gradient(circle at bottom right, rgba(150, 100, 255, 0.1), transparent 55%),
                #050814;
}

.about-content {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
}

.about-text {
    font-size: 1.02rem;
    line-height: 1.8;
    color: #c3c7dd;
    max-width: 600px;
    padding-left: 0.2rem;
}

.about-image {
    background: radial-gradient(circle at 20% 20%, rgba(255,255,255,0.1), transparent 55%),
                radial-gradient(circle at 80% 80%, rgba(100, 150, 255, 0.2), transparent 60%),
                #050814;
    height: 340px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid rgba(100, 150, 255, 0.35);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.8);
}

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

.about-kicker {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #7da8ff;
    margin-bottom: 0.8rem;
}

.about-list {
    margin-top: 1.2rem;
    padding-left: 1.1rem;
}

.about-list li {
    margin-bottom: 0.6rem;
}

/* Footer */
footer {
    background: #0a0e27;
    color: #b0b0b0;
    text-align: center;
    padding: 2rem;
    border-top: 1px solid rgba(100, 150, 255, 0.2);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: #64a0ff;
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section a {
    color: #b0b0b0;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #64a0ff;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    nav {
        padding: 0 1rem;
    }

    .logo {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }

    .menu-toggle {
        display: flex;
    }

    nav ul,
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: linear-gradient(135deg, #1a1f3a 0%, #0f1419 100%);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 2rem;
        gap: 2rem;
        transition: left 0.3s ease;
        z-index: 1000;
        box-shadow: 2px 0 20px rgba(0,0,0,0.5);
    }

    nav ul.active,
    .nav-menu.active {
        left: 0;
    }

    nav ul li,
    .nav-menu li {
        width: 100%;
        text-align: center;
    }

    nav ul a,
    .nav-menu a {
        display: block;
        padding: 1rem;
        font-size: 1.1rem;
        width: 100%;
    }

    nav a::after {
        display: none;
    }

    /* Hero Section Mobile */
    .hero {
        padding: 120px 1rem 80px;
        margin-top: 60px;
    }

    .hero h1 {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: 1rem;
    }

    .hero p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
        padding: 0 1rem;
    }

    .cta-button {
        padding: 12px 30px;
        font-size: 0.95rem;
    }

    /* Sections Mobile */
    section {
        padding: 60px 1rem;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
        padding: 0 1rem;
    }

    .section-title::after {
        width: 60px;
    }

    /* Features Grid Mobile */
    .features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .feature-icon {
        font-size: 2.5rem;
    }

    .feature-card h3 {
        font-size: 1.2rem;
    }

    .feature-card p {
        font-size: 0.95rem;
    }

    /* Courses Grid Mobile */
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .course-card {
        padding: 1.5rem;
    }

    .course-icon {
        font-size: 2rem;
    }

    .course-card h3 {
        font-size: 1.2rem;
    }

    .course-card p {
        font-size: 0.95rem;
    }

    /* Projects Grid Mobile */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .project-card {
        padding: 1.5rem;
    }

    .project-title {
        font-size: 1.2rem;
    }

    .project-description {
        font-size: 0.95rem;
    }

    .project-tech {
        gap: 0.4rem;
    }

    .tech-tag {
        font-size: 0.8rem;
        padding: 4px 10px;
    }

    /* About Section Mobile */
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-text {
        font-size: 1rem;
        padding: 0 0.5rem;
    }

    .about-image {
        height: 250px;
        font-size: 2.5rem;
    }

    /* Footer Mobile */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 1rem;
    }

    .footer-section {
        text-align: center;
    }

    footer {
        padding: 2rem 1rem;
    }

    footer p {
        font-size: 0.9rem;
    }
}

/* Extra Small Devices */
@media (max-width: 480px) {
    .logo {
        font-size: 1rem;
    }

    .hero h1 {
        font-size: 1.7rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .feature-card,
    .course-card,
    .project-card {
        padding: 1.2rem;
    }

    .cta-button {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
}