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

body {
    font-family: system-ui, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
    line-height: 1.6;
}

/* NAVBAR */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 40px;
    background: #020617;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
}

.logo span {
    color: #38bdf8;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 25px;
}

.nav-links a {
    text-decoration: none;
    color: #94a3b8;
}

.nav-links a:hover {
    color: #38bdf8;
}

.menu-toggle {
    display: none;
    background: none;
    color: #e5e7eb;
    font-size: 1.5rem;
    border: none;
    cursor: pointer;
}

/* HERO */
.hero {
    text-align: center;
    padding: 120px 20px;
}

.hero h1 {
    font-size: 2.8rem;
}

.hero span {
    color: #38bdf8;
}

.hero button {
    margin-top: 25px;
    padding: 12px 30px;
    background: #38bdf8;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

/* SECTIONS */
section {
    padding: 80px 40px;
    max-width: 1100px;
    margin: auto;
}

h2 {
    margin-bottom: 30px;
    text-align: center;
}

/* GRID */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.card, .publication {
    background: #0b1120;
    padding: 25px;
    border-radius: 14px;
    text-align: center;
}

/* PROJECTS */
#project-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.project {
    background: #0b1120;
    padding: 25px;
    border-radius: 14px;
    transition: 0.3s ease;
}

.project:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 25px rgba(56, 189, 248, 0.3);
}

.project h3 {
    margin-bottom: 10px;
    color: #38bdf8;
}

/* FORM */
form {
    max-width: 420px;
    margin: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

input, textarea {
    padding: 12px;
    border-radius: 6px;
    border: none;
}

button {
    background: #38bdf8;
    border: none;
    padding: 12px;
    cursor: pointer;
    border-radius: 6px;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 20px;
    background: #020617;
    margin-top: 60px;
}

/* MOBILE */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: #020617;
        position: absolute;
        top: 60px;
        right: 20px;
        padding: 20px;
        border-radius: 10px;
    }

    .nav-links.show {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.2rem;
    }
}