/* =========================
   RESET BASE
========================= */
html, body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    transition: all 0.3s ease;
    scroll-behavior: smooth;
}

/* =========================
   ANIMAÇÃO DE GRADIENT
========================= */
@keyframes gradientMove {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* =========================
   🌙 DARK MODE (PADRÃO)
========================= */
body {
    background: radial-gradient(circle at center, #1a1a1a, #0d0d0d, #111827, #1e293b);
    background-size: 400% 400%;
    animation: gradientMove 15s ease infinite;
    color: #ffffff;
    position: relative;
    overflow-x: hidden;
}

/* Neon overlay leve */
body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 20% 20%, rgba(0,255,255,0.08), transparent 70%),
                radial-gradient(circle at 80% 80%, rgba(255,0,255,0.08), transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* =========================
   HEADER
========================= */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 2rem;
    background-color: rgba(34, 34, 34, 0.9);
    backdrop-filter: blur(10px);
    transition: top 0.3s ease, background-color 0.3s ease;
}

/* NAV LINKS */
header .nav-link {
    color: #fff;
    transition: color 0.3s ease;
}

header .nav-link.text-secondary {
    color: #bbb;
}

header .nav-link:hover {
    color: #4ea8ff;
}

/* =========================
   HERO
========================= */
.cover-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a, #0d0d0d, #111827, #1e293b);
    background-size: 400% 400%;
    animation: gradientMove 15s ease infinite;
    z-index: 1;
}

/* =========================
   SEÇÕES COM CAMADA TRANSPARENTE
========================= */
.introducao, .linguagens, .projetos, .sobre, .contato { 
    background: linear-gradient( 270deg, rgba(40, 149, 149, 0.08),
     rgba(161, 99, 241, 0.08), rgba(222, 222, 222, 0.08) );
      background-size: 400% 400%; animation: gradientMove 15s ease infinite; 
      backdrop-filter: blur(6px); border-radius: 12px;
       padding: 17rem 2rem 18rem 2rem; /* top | right | bottom | left */
       text-align: center; z-index: 1; }

/* TEXTOS */
.texto-int {
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    font-size: 1.2rem;
}

/* CARDS */
.card {
    border: none;
    border-radius: 12px;
    background-color: rgba(34,34,34,0.8);
    color: #fff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 25px rgba(0,255,255,0.4);
}

/* LINKS */
a {
    color: #4ea8ff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* =========================
   PROFILE IMAGE
========================= */
.profile-img {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #4ea8ff;
    box-shadow: 0 4px 20px rgba(0, 255, 255, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-img:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 30px rgba(0, 255, 255, 0.5);
}

/* =========================
   SEÇÃO CONTATO
========================= */
.contato {
    margin-bottom: 1rem;
    padding: 4rem 2rem;
    border-radius: 12px;
    backdrop-filter: blur(6px);
    text-align: center;
    background: radial-gradient(
        circle at center,
        rgba(40, 149, 149, 0.08),
        rgba(161, 99, 241, 0.08),
        rgba(222, 222, 222, 0.08)
    );
    background-size: 400% 400%;
    animation: gradientMove 15s ease infinite;
}

/* CARD/FORMULÁRIO */
.contato-card {
    background-color: rgba(20, 20, 40, 0.6);
    color: #ffffff;
    border-radius: 12px;
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto;
    backdrop-filter: blur(6px);
}

/* LABELS E INPUTS */
.contato-card label {
    display: block;
    text-align: left;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #ffffff;
}

.contato-card input,
.contato-card textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    margin-bottom: 1.5rem;
    border: 1px solid #555;
    border-radius: 6px;
    background-color: rgba(34, 34, 34, 0.8);
    color: #ffffff;
}

.contato-card input::placeholder,
.contato-card textarea::placeholder {
    color: #ccc;
}

/* BOTÃO */
.contato-card button {
    background-color: #4ea8ff;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contato-card button:hover {
    background-color: #3b8cd1;
}

/* =========================
   FOOTER
========================= */
.footer {
    background: linear-gradient(135deg, #0a0a0a, #111827, #1e293b);
    background-size: 400% 400%;
    animation: gradientMove 15s ease infinite;
    color: #fff;
    padding: 1rem 2rem;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.9rem;
    z-index: 1;
}

/* Links do footer */
.footer-links li {
    display: inline;
}

.footer-links a {
    color: #4ea8ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #00ffff;
}

/* Redes sociais */
.footer-social .footer-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.footer-social .footer-icon:hover {
    transform: scale(1.2);
    filter: drop-shadow(0 0 6px #4ea8ff);
}

/* =========================
   ☀️ LIGHT MODE
========================= */
body.light {
    background: linear-gradient(135deg, #ffffff, #eaeaea, #f5f5f5);
    background-size: 400% 400%;
    animation: gradientMove 15s linear infinite;
    color: #111;
}

/* header light */
body.light header {
    background-color: #ddd;
}

/* hero light animado */
body.light .cover-container {
    background: radial-gradient(circle at center, #ffffff, #eaeaea, #f5f5f5);
    background-size: 400% 400%;
    animation: gradientMove 15s linear infinite;
}

/* seções light */
body.light .introducao,
body.light .projetos {
    background-color: #ffffff;
}

body.light .linguagens,
body.light .sobre,
body.light .contato {
    background-color: #f1f1f1;
}

/* cards light */
body.light .card {
    background-color: #ffffff;
    color: #111;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* links light */
body.light a {
    color: #0077cc;
}

/* contato-card light */
body.light .contato-card {
    background-color: #f1f1f1;
    color: #111111;
}

body.light .contato-card label {
    color: #111111;
}

body.light .contato-card input,
body.light .contato-card textarea {
    background-color: #fff;
    color: #111111;
    border: 1px solid #ccc;
}

body.light .contato-card input::placeholder,
body.light .contato-card textarea::placeholder {
    color: #666;
}

body.light .contato-card button {
    background-color: #0077cc;
    color: #fff;
}

body.light .contato-card button:hover {
    background-color: #005fa3;
}

/* footer light animado */
body.light .footer {
    background: linear-gradient(135deg, #f5f5f5, #eaeaea, #ffffff);
    background-size: 400% 400%;
    animation: gradientMove 15s linear infinite;
    color: #111;
    border-top: 1px solid rgba(0,0,0,0.1);
}

/* links do footer light */
body.light .footer-links a {
    color: #0077cc;
}

body.light .footer-links a:hover {
    color: #004a99;
}

body.light .footer-social .footer-icon:hover {
    filter: drop-shadow(0 0 6px #0077cc);
}

/* =========================
   BOTÕES
========================= */
.btn {
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

/* =========================
   RESPONSIVO
========================= */
@media (max-width: 768px) {
    .cover-container {
        padding: 2rem;
    }

    .introducao,
    .linguagens,
    .projetos,
    .sobre {
        padding: 4rem 1.5rem;
        margin-bottom: 4rem;
    }

    .texto-int {
        font-size: 1.1rem;
    }

    .footer-links {
        flex-direction: column;
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer-social {
        gap: 1rem;
        justify-content: center;
    }
}