/* =========================================================
   HEADER / NAVBAR
   Fixa no topo · muda de aparência ao rolar · scrollspy
   Menu lateral moderno no mobile com backdrop e hambúrguer animado
   ========================================================= */

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    transition: background-color var(--t-base) var(--ease),
        box-shadow var(--t-base) var(--ease),
        backdrop-filter var(--t-base) var(--ease);
}

.site-header.is-scrolled {
    background-color: rgba(23, 23, 23, 0.88);
    -webkit-backdrop-filter: saturate(140%) blur(12px);
    backdrop-filter: saturate(140%) blur(12px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
    border-bottom: 1px solid var(--color-white-12);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: var(--header-h);
    padding-block: 14px;
    transition: min-height var(--t-base) var(--ease);
}

.site-header.is-scrolled .navbar {
    min-height: 64px;
}

/* ---- Logo ---- */
.nav-logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}

.nav-logo img {
    height: 34px;
    width: auto;
}

.nav-logo:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

/* ---- Menu desktop ---- */
.nav-menu {
    display: flex;
    align-items: center;
    gap: clamp(20px, 3vw, 40px);
}

.nav-link {
    position: relative;
    display: inline-block;
    padding: 6px 2px;
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    letter-spacing: 0.01em;
    color: var(--color-white);
    transition: color var(--t-fast) var(--ease);
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--t-base) var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.is-active::after {
    transform: scaleX(1);
}

.nav-link.is-active {
    color: var(--color-primary);
    font-weight: var(--fw-semibold);
}

/* ---- Botão hambúrguer (elegante, animado) ---- */
.nav-toggle {
    display: none;
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    z-index: 1002;
    transition: background-color var(--t-fast) var(--ease);
}

.nav-toggle:hover {
    background-color: var(--color-white-12);
}

.nav-toggle span {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 22px;
    height: 2px;
    background-color: var(--color-white);
    border-radius: 2px;
    transform: translate(-50%, -50%);
    transition: transform var(--t-base) var(--ease),
        opacity var(--t-fast) var(--ease),
        background-color var(--t-fast) var(--ease);
}

.nav-toggle span:nth-child(1) {
    transform: translate(-50%, -8px);
}

.nav-toggle span:nth-child(3) {
    transform: translate(-50%, 8px);
}

/* Estado aberto → vira "X" */
.nav-toggle.is-open span:nth-child(1) {
    transform: translate(-50%, -50%) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
    transform: translate(-50%, -50%) rotate(-45deg);
}

/* ---- Backdrop (fundo escurecido) ---- */
.nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 998;
    background: rgba(15, 15, 15, 0.55);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t-base) var(--ease), visibility var(--t-base) var(--ease);
}

.nav-backdrop.is-open {
    opacity: 1;
    visibility: visible;
}

/* ---- Drawer lateral (mobile/tablet) ---- */
.nav-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: min(82vw, 340px);
    height: 100vh;
    height: 100dvh;
    padding: 90px 32px;
    background: linear-gradient(180deg, #1c1c1c, #141414);
    border-left: 1px solid var(--color-gold-line);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.45);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.42s var(--ease-out), visibility 0.42s var(--ease-out);
}

.nav-drawer.is-open {
    transform: translateX(0);
    visibility: visible;
}

.nav-drawer .nav-drawer-label {
    font-family: var(--font-secondary);
    font-size: var(--fs-eyebrow);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-white-55);
    margin-bottom: 6px;
}

.nav-drawer-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 4px;
    font-family: var(--font-secondary);
    font-size: 1.05rem;
    font-weight: var(--fw-medium);
    color: var(--color-white);
    border-bottom: 1px solid var(--color-white-12);
    transition: color var(--t-fast) var(--ease), padding-left var(--t-base) var(--ease);
}

.nav-drawer-link::after {
    content: "";
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--color-primary);
    border-right: 2px solid var(--color-primary);
    transform: rotate(45deg);
    opacity: 0;
    transition: opacity var(--t-fast) var(--ease);
}

.nav-drawer-link:hover,
.nav-drawer-link:focus-visible,
.nav-drawer-link.is-active {
    color: var(--color-primary);
    padding-left: 12px;
}

.nav-drawer-link.is-active::after,
.nav-drawer-link:hover::after {
    opacity: 1;
}

/* ---- Breakpoints ---- */
@media (max-width: 900px) {

    .nav-menu {
        display: none;
    }

    .nav-toggle {
        display: block;
    }
}

/* Trava o scroll do body quando o drawer está aberto */
body.no-scroll {
    overflow: hidden;
}