:root {
    --primary: #0066FF;
    --text-main: #172033;
    --text-muted: #5a6278;
    --bg-light: #f8fafc;
    --border-color: #e7edf5;
    --white: #ffffff;
    --dark-bg: #101827;
}

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

body {
    font-family: 'Overpass', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background-color: var(--dark-bg);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--white);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #101827 0%, #1f2a3d 100%);
    padding: 160px 0 100px;
    color: var(--white);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1, .hero-text h2 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 18px;
    color: #d7e0ef;
    margin-bottom: 30px;
    max-width: 90%;
}

.hero-image {
    flex: 1;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    border: 2px solid var(--primary);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary);
}

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

.btn-outline:hover {
    background-color: var(--white);
    color: var(--dark-bg);
}

/* Projects Section */
.projects-section {
    padding: 100px 0;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title span {
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 10px;
    display: block;
    text-transform: uppercase;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-main);
}

.section-title p {
    color: var(--text-muted);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.project-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent);
    padding: 30px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.project-card:hover {
    background: var(--white);
    box-shadow: 0 16px 35px rgba(15,23,42,0.08);
    transform: translateY(-5px);
}

.project-icon {
    width: 54px;
    height: 54px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--accent);
    flex-shrink: 0;
}

.category {
    display: block;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.project-info h3 {
    color: var(--text-main);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-info p {
    color: var(--text-muted);
    font-size: 15px;
}

/* Student Section */
.student-section {
    padding: 80px 0;
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

.student-card {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: 50px;
    border-radius: 16px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.student-icon {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 20px;
}

.student-card h3 {
    font-size: 28px;
    margin-bottom: 15px;
}

.student-card p {
    color: #d7e0ef;
    margin-bottom: 30px;
    font-size: 16px;
}

/* Footer */
.footer {
    background-color: #0b111e;
    color: var(--text-muted);
    text-align: center;
    padding: 60px 0;
}

.footer-logo {
    height: 40px;
    margin-bottom: 20px;
    opacity: 0.8;
}

.footer p {
    margin-bottom: 10px;
    font-size: 14px;
}

.footer .address {
    font-size: 13px;
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 991px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    .hero-text p {
        margin: 0 auto 30px;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    .hero h1, .hero h2 {
        font-size: 32px;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav {
        gap: 15px;
    }
    .nav a {
        font-size: 14px;
    }
    .hero {
        padding: 220px 0 60px;
    }
    .hero h1, .hero h2 {
        font-size: 28px;
    }
    .btn {
        padding: 12px 24px;
        font-size: 15px;
        width: 100%;
        justify-content: center;
    }
    .project-card {
        padding: 20px;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .student-card {
        padding: 30px 20px;
    }
    .student-card h3 {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 180px;
    }
}