/* =========================
   header.css
   ========================= */
header {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    z-index: 100;
    padding: 20px 0;
}

.logo-svg {
    height: 50px;
    width: auto;
    filter: drop-shadow(0 0 10px var(--primary));
}

/* =========================
   MAGIC NAVIGATION BAR
   ========================= */
.magic-nav {
    position: fixed;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    width: 320px; /* 4 itens de 70px + bordas */
    height: 70px;
    background: rgba(10, 21, 37, 0.95);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border-radius: 35px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), inset 0 0 0 1px rgba(0, 243, 255, 0.1);
}

.magic-nav ul {
    display: flex;
    width: 280px; /* 4 itens x 70px */
    position: relative;
    list-style: none;
}

.magic-nav ul li {
    position: relative;
    width: 70px;
    height: 70px;
    z-index: 1;
}

.magic-nav ul li a {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    width: 100%;
    text-align: center;
    font-weight: 500;
    text-decoration: none;
}

.magic-nav ul li a .icon {
    position: relative;
    display: block;
    line-height: 75px;
    font-size: 1.5rem;
    text-align: center;
    transition: 0.5s;
    color: var(--text-gray);
    z-index: 2;
}

/* Ícone sobe quando está ativo */
.magic-nav ul li.active a .icon {
    transform: translateY(-35px);
    color: var(--bg-dark);
}

.magic-nav ul li a .text {
    position: absolute;
    color: var(--primary);
    font-size: 0.65rem;
    font-family: var(--font-heading);
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: 0.5s;
    opacity: 0;
    transform: translateY(20px);
}

/* Texto aparece quando está ativo */
.magic-nav ul li.active a .text {
    opacity: 1;
    transform: translateY(12px);
    text-shadow: 0 0 5px rgba(0, 243, 255, 0.5);
}

/* =========================
   O INDICADOR QUE AFUNDA
   ========================= */
.indicator {
    position: absolute;
    top: -50%;
    width: 70px;
    height: 70px;
    background: var(--primary);
    border-radius: 50%;
    border: 6px solid var(--bg-dark);
    transition: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: inset 0 -3px 10px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 243, 255, 0.6);
}

/* Curvas laterais do buraco */
.indicator::before {
    content: '';
    position: absolute;
    top: 48%; left: -22px;
    width: 20px; height: 20px;
    background: transparent;
    border-top-right-radius: 20px;
    box-shadow: 0px -10px 0 0 var(--bg-dark);
}

.indicator::after {
    content: '';
    position: absolute;
    top: 48%; right: -22px;
    width: 20px; height: 20px;
    background: transparent;
    border-top-left-radius: 20px;
    box-shadow: 0px -10px 0 0 var(--bg-dark);
}

/* Posicionamento do indicador conforme item ativo */
.magic-nav ul li:nth-child(1).active ~ .indicator { transform: translateX(calc(70px * 0)); }
.magic-nav ul li:nth-child(2).active ~ .indicator { transform: translateX(calc(70px * 1)); }
.magic-nav ul li:nth-child(3).active ~ .indicator { transform: translateX(calc(70px * 2)); }
.magic-nav ul li:nth-child(4).active ~ .indicator { transform: translateX(calc(70px * 3)); }