@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif; 
    line-height: 1.7; color: #1a202c; background: linear-gradient(135deg, #0f1419 0%, #1a202c 50%, #2d3748 100%);
    scroll-behavior: smooth; overflow-x: hidden;
}

/* Navigation - Professional Dark */
nav { 
    position: fixed; top: 0; width: 100%; background: rgba(15, 20, 25, 0.95); 
    backdrop-filter: blur(20px); z-index: 1000; box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    animation: navSlideDown 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
@keyframes navSlideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.nav-container {
    max-width: 1400px; margin: 0 auto; padding: 0 20px;
}
nav ul { 
    display: flex; justify-content: center; list-style: none; padding: 1.5rem 0; 
    flex-wrap: wrap; gap: 1rem;
}
nav li { margin: 0 1rem; }
nav a { 
    text-decoration: none; color: #e2e8f0; font-weight: 500; font-size: 1rem;
    padding: 0.75rem 1.5rem; border-radius: 12px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.5px; position: relative; white-space: nowrap;
}
nav a:hover, nav a.active { 
    color: #4299e1; background: rgba(66, 153, 225, 0.1); 
    box-shadow: 0 8px 25px rgba(66, 153, 225, 0.2); transform: translateY(-2px);
}

/* Hamburger Menu */
.hamburger {
    display: none; flex-direction: column; cursor: pointer; padding: 0.5rem; gap: 4px;
}
.hamburger span {
    width: 25px; height: 3px; background: #e2e8f0; border-radius: 3px; transition: 0.3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }

/* Sections */
section { 
    min-height: 100vh; display: flex; flex-direction: column; 
    justify-content: center; align-items: center; text-align: center; 
    padding: 160px 20px 80px; opacity: 0; transform: translateY(40px);
    animation: fadeInUp 2.5s forwards;
}
section.animate { animation-delay: 0.5s; }
@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}
hr { 
    width: 300px; height: 3px; background: linear-gradient(90deg, #4299e1, #63b3ed); 
    border: none; border-radius: 10px; margin: 4rem auto; opacity: 0; 
    animation: lineExpand 1.5s 0.8s forwards;
}
@keyframes lineExpand {
    to { width: 120px; opacity: 1; }
}

/* Home Section - Professional Blue */
#home { background: linear-gradient(135deg, #2b6cb0 0%, #4299e1 50%, #bee3f8 100%); color: white; }
.hero-content { max-width: 900px; width: 100%; }
.display_img { 
    width: 220px; height: 220px; border-radius: 50%; object-fit: cover; 
    box-shadow: 0 30px 80px rgba(43, 108, 176, 0.4); border: 5px solid rgba(255,255,255,0.9);
    margin-bottom: 2.5rem; transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0; transform: scale(0.9); animation: profileRise 1.2s 0.6s forwards;
}
@keyframes profileRise {
    to { opacity: 1; transform: scale(1); }
}
.display_img:hover { transform: scale(1.05); box-shadow: 0 40px 100px rgba(43, 108, 176, 0.5); }

h1 { 
    font-size: clamp(2.5rem, 8vw, 5.5rem); font-weight: 700; margin: 2rem 0 1.5rem; 
    letter-spacing: -2px; line-height: 1.1; color: white;
    opacity: 0; transform: translateY(30px); animation: titleSlide 1s 1s forwards;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
@keyframes titleSlide {
    to { opacity: 1; transform: translateY(0); }
}
h2 { font-size: clamp(1.5rem, 5vw, 2.2rem); font-weight: 600; margin-bottom: 1.8rem; color: white; opacity: 0.95; }
h3 { font-size: clamp(1.3rem, 4vw, 1.7rem); font-weight: 600; margin-bottom: 1.5rem; color: #e2e8f0; }
p { font-size: clamp(1rem, 3vw, 1.25rem); max-width: 850px; margin: 0 auto 3rem; color: #f7fafc; opacity: 0.9; }

/* Professional Buttons */
.btn { 
    display: inline-block; background: rgba(255,255,255,0.95); color: #2d3748; 
    padding: 16px 36px; text-decoration: none; border-radius: 12px; 
    font-weight: 500; font-size: 1.1rem; margin: 0 1rem; 
    box-shadow: 0 12px 40px rgba(0,0,0,0.15); transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 2px solid rgba(255,255,255,0.9); letter-spacing: 0.5px; backdrop-filter: blur(12px);
    opacity: 0; transform: translateY(30px);
}
.btn:nth-of-type(1) { animation: btnSlide 0.8s 1.8s forwards; }
.btn:nth-of-type(2) { animation: btnSlide 0.8s 2.1s forwards; }
@keyframes btnSlide {
    to { opacity: 1; transform: translateY(0); }
}
.btn:hover { 
    transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    background: white; border-color: rgba(255,255,255,1);
}

/* Professional Cards */
.grid { 
    display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); 
    gap: 3rem; max-width: 1400px; width: 100%; margin-top: 5rem; padding: 0 20px; 
    justify-items: center;
}
.card { 
    background: rgba(255,255,255,0.05); backdrop-filter: blur(20px); padding: 3rem 2.5rem; 
    border-radius: 20px; border: 1px solid rgba(255,255,255,0.1); transition: all 0.5s ease;
    box-shadow: 0 25px 70px rgba(0,0,0,0.3); position: relative; overflow: hidden; width: 100%; max-width: 400px;
    opacity: 0; transform: translateY(50px);
}
.card:nth-child(1) { animation: cardReveal 0.9s 0.3s forwards; }
.card:nth-child(2) { animation: cardReveal 0.9s 0.5s forwards; }
.card:nth-child(3) { animation: cardReveal 0.9s 0.7s forwards; }
@keyframes cardReveal {
    to { opacity: 1; transform: translateY(0); }
}
.card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, #4299e1, #63b3ed, #4299e1);
}
.card:hover { 
    transform: translateY(-15px); box-shadow: 0 40px 100px rgba(0,0,0,0.4);
    background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.2);
}

/* Professional Form */
form { max-width: 650px; width: 100%; }
input, textarea { 
    width: 100%; padding: 1.5rem 2rem; margin: 1.3rem 0; border: 2px solid rgba(255,255,255,0.2); 
    border-radius: 15px; background: rgba(255,255,255,0.05); color: #e2e8f0; 
    font-size: 1.15rem; font-family: inherit; transition: all 0.4s ease;
    backdrop-filter: blur(15px); box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}
input::placeholder, textarea::placeholder { color: #a0aec0; }
input:focus, textarea:focus { 
    outline: none; border-color: #4299e1; box-shadow: 0 0 0 4px rgba(66, 153, 225, 0.1);
    transform: translateY(-3px); background: rgba(255,255,255,0.1);
}
button { 
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%); color: white; 
    border: none; padding: 1.6rem 3.5rem; border-radius: 15px; cursor: pointer; 
    font-size: 1.15rem; font-weight: 600; transition: all 0.4s ease;
    box-shadow: 0 15px 45px rgba(66, 153, 225, 0.3); letter-spacing: 0.8px;
    width: 100%; margin-top: 1.5rem;
}
button:hover { 
    transform: translateY(-5px); box-shadow: 0 25px 60px rgba(66, 153, 225, 0.4);
}

/* Contact Info */
.contact-info { 
    margin-top: 4rem; font-size: 1.2rem; color: #e2e8f0;
}
.contact-info a { 
    color: #4299e1; text-decoration: none; font-weight: 500; 
    transition: all 0.3s ease;
}
.contact-info a:hover { color: #63b3ed; }

/* Responsive Design */
@media (max-width: 1024px) {
    .grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2.5rem; }
}

@media (max-width: 768px) { 
    section { padding: 140px 16px 60px; }
    .display_img { width: 180px; height: 180px; margin-bottom: 1.5rem; }
    .btn { display: block; margin: 1rem auto; padding: 14px 28px; font-size: 1rem; max-width: 280px; }
    h1 { margin: 1.5rem 0 1rem; }
    .grid { 
        grid-template-columns: 1fr; gap: 2rem; margin-top: 3rem; padding: 0 16px;
    }
    .card { padding: 2.5rem 2rem; max-width: none; }
    nav ul { 
        display: none; position: absolute; top: 100%; left: 0; width: 100%; 
        background: rgba(15, 20, 25, 0.98); backdrop-filter: blur(20px);
        flex-direction: column; padding: 1rem 20px; box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    }
    nav ul.active { display: flex; }
    .hamburger { display: flex; }
    .nav-container { display: flex; justify-content: space-between; align-items: center; padding: 1rem 20px; }
    hr { width: 200px; }
}

@media (max-width: 480px) {
    section { padding: 120px 12px 40px; }
    .display_img { width: 160px; height: 160px; }
    form { padding: 0 1rem; }
    input, textarea, button { font-size: 1rem; padding: 1.2rem 1.5rem; }
    .contact-info { font-size: 1.1rem; }
}