/* ===========================================================
   CSS MODERNO - Header com glassmorphism aprimorado (AJUSTADO)
   =========================================================== */

/* -------- Variáveis (fácil ajuste de temática) -------- */
:root {
    --accent: #F51919;
    --accent-rgb: 245, 25, 25;
    --bg: #ffffff;
    --muted: #6B7280;
    --text: #0b1220;
    --text-on-dark: #ffffff;
    --glass-alpha: 0.88;
    --glass-alpha-scrolled: 0.56;
    --glass-blur: 6px;
    --glass-blur-scrolled: 12px;
    --card-radius: 50px;
    --nav-radius-default: 28px;
    --nav-radius-scrolled: 50px;
    --shadow-soft: 0 8px 28px rgba(12, 16, 32, 0.06);
    --shadow-accent: 0 10px 30px rgba(245, 25, 25, 0.10);
    --ease: cubic-bezier(.2, .9, .25, 1);
    --header-bg: rgba(250, 251, 253, 0.95);
}

/* ---------- reset e base ---------- */
* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale
}

html,
body {
    height: 100%;
    margin: 0;
    font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial
}

:root {
    --site-header-height: 84px
}

/* ---------- header fixo ---------- */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 10000;
    display: flex;
    justify-content: center;
    padding: 16px 20px;
    box-shadow: var(--shadow-soft);
    border-bottom: 1px solid rgba(10, 14, 20, 0.04);
    background: transparent;
    /* header base transparente — conteúdo interno controla o visual */
    transition: padding .22s var(--ease), box-shadow .22s var(--ease), background .28s var(--ease);
}

/* container interno com largura controlada */
.sh-inner {
    width: min(1180px, 96%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 6px;
    /* pequeno padding para respiro */
    border-radius: 999px;
    /* aparência pill leve */
    /* Estado padrão (não scrolled): fundo branco sólido */
    background: transparent;
    box-shadow: none;
    transition: background .28s var(--ease), backdrop-filter .28s var(--ease), color .18s var(--ease), box-shadow .28s var(--ease), transform .18s var(--ease);
}

/* quando NÃO scrolled -> fundo branco (leitura padrão) */
.site-header:not(.scrolled) .sh-inner {

    color: var(--text);
    backdrop-filter: none;
}

/* quando scrolled -> fundo bem transparente + blur (glass) */
/* removemos gradação cinza: apenas branca translúcida com blur */
.site-header.scrolled .sh-inner {
    background: rgba(221, 117, 117, 0);
    color: var(--text);
    transition: background .28s var(--ease), backdrop-filter .28s var(--ease), color .18s var(--ease);
}

/* se o JS detectar que o fundo por baixo é escuro, adicionamos .dark-backdrop para garantir contraste */
.site-header.scrolled.dark-backdrop .sh-inner {
    background: rgba(0, 0, 0, 0.36);
    /* escurece levemente */
    color: var(--text-on-dark);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.38);
}

/* ---------- Pills (cards internos) ---------- */
/* cartão base com glass effect leve — removi gradiente cinza e deixei branco translúcido */
.sh-cont {
    background: #ffffff02;
    border-radius: var(--card-radius);
    padding: 16px 48px;
    display: flex;
    align-items: center;
    min-height: 48px;
    box-shadow: 0 6px 18px rgba(12, 16, 32, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(var(--glass-blur)) saturate(115%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(115%);
    transition: transform .22s var(--ease), background .28s var(--ease), box-shadow .28s var(--ease), backdrop-filter .28s var(--ease), padding .18s var(--ease);
}

/* ---------- sh-left (logo) — garantir espaço e alinhamento ---------- */
.sh-left {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 12px;
 
    padding-right: 24px;
    /* garante espaço mínimo para a logo sem "espremer" */
    min-width: 140px;
}

/* logo wrapper */
.logo-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-right: 8px;
    /* margem interna de separação */
}

/* logo em si */
.site-logo {
    height: 36px;
    display: block;
    margin-right: 8px;
    max-width: 220px;
    object-fit: contain;
}

/* se a logo for muito larga em telas pequenas, limita para não quebrar layout */
@media (max-width:860px) {
    .sh-left {
        min-width: 92px;
        padding-left: 16px;
        padding-right: 12px
    }

    .site-logo {
        height: 32px;
        max-width: 140px
    }
}

/* ---------- sh-center/sh-right (mantive seu comportamento) ---------- */
.sh-center {
    justify-content: center;
    padding: 16px 48px;
    gap: 16px
}

.sh-right {
    flex: 0 0 auto;
    background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.94), rgba(var(--accent-rgb), 0.88));
    color: #fff;
    padding: 16px 42px;
    border-radius: 40px;
    box-shadow: var(--shadow-accent);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: transform .22s var(--ease), box-shadow .28s var(--ease), background .28s var(--ease);
}

/* sh-cont quando header scrolled: mais translúcido e blur aumentado */
.site-header.scrolled .sh-cont {
    background: linear-gradient(180deg,
            rgba(255, 255, 255, calc(var(--glass-alpha-scrolled) - 0.18)),
            rgba(255, 255, 255, calc(var(--glass-alpha-scrolled) - 0.10)));
    backdrop-filter: blur(var(--glass-blur-scrolled)) saturate(120%);
    -webkit-backdrop-filter: blur(var(--glass-blur-scrolled)) saturate(120%);
    box-shadow: 0 14px 40px rgba(8, 10, 14, 0.06);
    transform: translateY(-3px);
}

/* sh-right mais suave quando scrolled */
.site-header.scrolled .sh-right {
    background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.82), rgba(var(--accent-rgb), 0.74));
    box-shadow: var(--shadow-accent);
    transform: translateY(-2px);
}

/* ---------- navegação ---------- */
.nav {
    display: flex;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center
}

.nav-link {
    position: relative;
    display: inline-block;
    padding: 12px 28px;
    text-decoration: none;
    color: inherit;
    font-weight: 600;
    border-radius: var(--nav-radius-default);
    cursor: pointer;
    user-select: text;
    transition: color .18s var(--ease), transform .18s var(--ease), background .18s var(--ease), box-shadow .18s var(--ease);
    backface-visibility: hidden;
}

.nav-link::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, rgba(10, 14, 20, 0.98), rgba(10, 14, 20, 0.98));
    z-index: -1;
    opacity: 0;
    transform: scaleX(.98);
    transition: opacity .16s var(--ease), transform .16s var(--ease);
}

.nav-link:hover {
    transform: translateY(-2px);
    color: rgb(var(--accent-rgb))
}

.nav-link:active {
    transform: translateY(0)
}

.nav-link.active,
.nav-link[aria-current="true"],
.nav-link:focus {
    color: #fff;
    background: transparent;
    outline: none
}

.nav-link.active::after,
.nav-link[aria-current="true"]::after,
.nav-link:focus::after {
    opacity: 1;
    transform: scaleX(1);
    border-radius: inherit;
    background: linear-gradient(90deg, rgba(10, 14, 20, 1), rgba(15, 19, 25, 1));
    box-shadow: 0 6px 18px rgba(6, 8, 12, 0.28);
}

/* quando scrolled, radius dos nav-links conforme solicitado */
.site-header.scrolled .nav-link {
    border-radius: var(--nav-radius-scrolled);
    padding: 10px 26px;
    color: #111827
}

.site-header.scrolled .nav-link:hover {
    color: rgb(var(--accent-rgb))
}

.site-header.scrolled .nav-link.active,
.site-header.scrolled .nav-link[aria-current="true"] {
    color: #fff
}

/* seleção de texto */
.nav-link::selection,
.nav-link::-moz-selection {
    background: rgba(10, 14, 20, 0.9);
    color: #fff
}

/* GitHub btn */
.github-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    border-radius: 12px;
    text-decoration: none;
    color: #fff;
    transition: transform .18s var(--ease), box-shadow .22s var(--ease), opacity .2s var(--ease);
    will-change: transform
}

.github-btn svg {
    display: block;
    height: 22px;
    width: auto;
    fill: currentColor
}

.github-logo {
    height: 22px;
    display: block;
    filter: none
}

.github-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(245, 25, 25, 0.14)
}

.github-btn:active {
    transform: translateY(0)
}

/* fallback quando backdrop-filter não suportado */
@supports not (backdrop-filter: blur(1px)) {
    .site-header.scrolled .sh-cont {
        background: rgba(255, 255, 255, 0.72);
        border: 1px solid rgba(10, 14, 20, 0.04);
    }
}

/* foco acessível */
.nav-link:focus-visible {
    box-shadow: 0 0 0 6px rgba(10, 14, 30, 0.06);
    border-radius: 999px
}

/* responsividade */
@media (max-width:860px) {
    .sh-inner {
        gap: 12px
    }

    .sh-cont {
        padding: 12px 18px;
        min-height: 44px;
        border-radius: 28px
    }

    .sh-right {
        padding: 8px 18px;
        border-radius: 22px
    }

    .nav {
        gap: 8px
    }

    .nav-link {
        padding: 10px 14px;
        font-size: 14px;
        border-radius: 20px
    }

    .site-logo {
        height: 32px
    }
}

/* garantir que o main não fique coberto pelo header */
main {
    padding-top: var(--site-header-height, 84px)
}