/* ================================
   FONTE GLOBAL
================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: #0d1117;
    color: #fff;
    padding-top: 85px; /* evita sobreposição do header fixo */
}

/* ================================
   HEADER
================================ */
.header {
    width: 100%;
    padding: 18px 30px;
    background: rgba(20, 25, 37, 0.85);
    backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    border-bottom: 1px solid #222;
}

.nav {
    max-width: 1250px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 22px;
    font-weight: 900;
    cursor: pointer;
}

.logo span {
    color: #38bdf8;
    text-shadow: 0 0 10px #38bdf8;
}

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

.menu li a {
    color: #dce3ea;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
}

.menu li a:hover {
    color: #38bdf8;
}

.btn-mobile {
    display: none;
    background: none;
    color: white;
    font-size: 28px;
    border: none;
    cursor: pointer;
}

/* ================================
   HERO SECTION
================================ */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #111827, #0d1117);
    text-align: center;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 38px;
    font-weight: 800;
}

.hero p {
    margin-top: 10px;
    font-size: 18px;
    opacity: 0.8;
}

.btn-hero {
    display: inline-block;
    margin-top: 20px;
    padding: 14px 28px;
    background: #38bdf8;
    color: #000;
    font-weight: 700;
    border-radius: 8px;
    text-decoration: none;
    transition: 0.2s;
}

.btn-hero:hover {
    background: #4cc7ff;
}

/* ================================
   CURSOS SECTION
================================ */
.cursos {
    padding: 80px 20px;
    text-align: center;
}

.cursos h2 {
    margin-bottom: 10px;
}

.grid-cursos {
    max-width: 1200px;
    margin: 40px auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.card-curso {
    background: #161b22;
    border: 1px solid #2a2f3a;
    padding: 28px;
    border-radius: 16px;
    cursor: pointer;
    transition: 0.3s;
    text-align: center;
}

.card-curso:hover {
    transform: translateY(-6px);
    box-shadow: 0 0 10px #38bdf8;
}

.card-curso .icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.card-curso h3 {
    margin-bottom: 6px;
    font-size: 20px;
}

/* ================================
   SOBRE
================================ */
.sobre {
    text-align: center;
    padding: 70px 20px;
    background: #0c1220;
    color: #e2e8f0;
}

.sobre h2 {
    font-size: 26px;
    margin-bottom: 12px;
    color: #38bdf8;
    font-weight: 800;
}

.sobre p {
    max-width: 780px;
    margin: auto;
    line-height: 1.6;
    opacity: 0.85;
}

/* ================================
   CONTATO
================================ */
.contato {
    text-align: center;
    padding: 40px 20px;
    background: #0b1120;
    color: #cbd5e1;
}

.contato h2 {
    color: #38bdf8;
    font-size: 22px;
    margin-bottom: 8px;
}

/* ================================
   FOOTER
================================ */
.footer {
    background: #0a0f1a;
    padding: 25px 20px;
    text-align: center;
    border-top: 1px solid #1f2937;
}

.footer-bottom {
    opacity: 0.6;
    font-size: 14px;
    color: #94a3b8;
}

/* ================================
   RESPONSIVIDADE
================================ */

/* Tablets */
@media (max-width: 900px) {
    .hero h1 {
        font-size: 32px;
    }
}

/* Menu mobile */
@media (max-width: 800px) {

    .btn-mobile {
        display: block;
    }

    .menu {
        display: none;
        flex-direction: column;
        background: #111827;
        padding: 20px;
        position: absolute;
        top: 75px;
        right: 20px;
        border-radius: 10px;
        width: 200px;
        border: 1px solid #333;
        gap: 15px;
        animation: fadeIn 0.2s ease-in-out;
    }

    .menu.open {
        display: flex;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Celulares pequenos */
@media (max-width: 500px) {

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    .grid-cursos {
        grid-template-columns: 1fr;
    }

    .card-curso {
        padding: 22px;
    }

    .card-curso h3 {
        font-size: 18px;
    }
}