.header {
    position: fixed;
    top: 0;
    left: 0;

    width: 100%;
    padding: 1.5rem 2rem;

    display: flex;
    justify-content: space-between;
    align-items: center;

    font-size: 0.9rem;
    opacity: 0.85;
}

.header a:hover {
    opacity: 1;
    color: var(--purple-soft);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.header-divider {
    width: 1px;
    height: 14px;
    background: currentColor;
    opacity: 0.15;
    margin: 0 0.2rem;
}

/* ── Botão de idioma ── */
.lang-wrapper {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 9px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: inherit;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition), border-color var(--transition), background var(--transition);
}

.lang-btn:hover {
    opacity: 1;
    border-color: currentColor;
    background: var(--bg-secondary);
}

.lang-flag {
    font-size: 0.85rem;
    line-height: 1;
}

.lang-code {
    font-size: 0.75rem;
    letter-spacing: 0.03em;
}

.lang-chevron {
    font-size: 0.55rem;
    opacity: 0.5;
    transition: transform var(--transition);
}

.lang-wrapper.open .lang-chevron {
    transform: rotate(180deg);
}

/* Dropdown panel */
.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 140px;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    overflow: hidden;
    z-index: 200;

    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px);
    transition: opacity var(--transition), transform var(--transition);
}

.lang-wrapper.open .lang-dropdown {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 9px 14px;
    border: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    opacity: 0.6;
    cursor: pointer;
    text-align: left;
    transition: opacity var(--transition), background var(--transition);
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    opacity: 1;
    background: var(--bg-main);
}

.lang-option.active {
    opacity: 1;
    color: var(--purple-soft);
}

/* ── Switch de tema ── */
.theme-switch {
    position: relative;
    width: 52px;
    height: 28px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.12);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition), border-color var(--transition);
}

.theme-switch:hover {
    border-color: rgba(255, 255, 255, 0.25);
}

.theme-switch.on {
    background: var(--purple-main);
    border-color: var(--purple-main);
}

.theme-switch .switch-knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left var(--transition), background var(--transition);
}

.theme-switch.on .switch-knob {
    left: 27px;
    background: #fff;
}

.theme-switch .switch-knob svg {
    width: 11px;
    height: 11px;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
    flex-shrink: 0;
}

.theme-switch.on .switch-knob svg {
    color: var(--purple-main);
}

.header-link {
    display: flex;
    align-items: center;
    gap: 5px;
    opacity: 0.7;
    font-size: 0.85rem;
    transition: opacity 0.2s, color 0.2s;
}

.header-link i {
    font-size: 0.75rem;
}

.header-link:hover {
    opacity: 1;
    color: var(--purple-soft);
}

.home {
    min-height: 100vh;
    padding-top: 6rem;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;

    text-align: center;
}

/* ===== SWITCH BASE ===== */
.theme-switch {
    width: 52px;
    height: 28px;
    background: var(--bg-secondary);
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);

    display: flex;
    align-items: center;
    padding: 3px;

    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

/* 🔥 ESTADO ATIVO (LIGHT MODE) */
.theme-switch[aria-checked="true"] {
    background: var(--purple-main);
    border-color: transparent;
}

/* ===== KNOB ===== */
.switch-knob {
    width: 22px;
    height: 22px;
    background: var(--bg-main);
    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;

    transition: var(--transition);
}

/* 🔥 MOVE PARA DIREITA */
.theme-switch[aria-checked="true"] .switch-knob {
    transform: translateX(24px);
    background: #ffffff;
}

/* ===== ÍCONE ===== */
#themeIcon {
    width: 14px;
    height: 14px;
    color: var(--text-main);
    transition: var(--transition);
}

/* 🔥 ÍCONE NO MODO LIGHT */
.theme-switch[aria-checked="true"] #themeIcon {
    color: var(--purple-main);
}

.theme-switch {
    background: var(--bg-secondary);
}

/* hover bonito */
.theme-switch:hover {
    transform: scale(1.05);
}

/* ===== HAMBURGUER ===== */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1100;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-main);
    transition: var(--transition);
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {

    .menu-toggle {
        display: flex;
    }

    .header-controls {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;

        background: var(--bg-main);
        border-left: 1px solid var(--bg-secondary);

        display: flex;
        flex-direction: column;
        gap: 24px;

        padding: 90px 24px;

        transition: 0.3s ease;
        z-index: 1000;
    }

    /* 🔥 aberto */
    .header-controls.open {
        right: 0;
    }
    
    /* ===== LINKS ===== */
    .header-links {
        font-size: 1.2rem;
        font-weight: 500;

        padding: 10px 12px;
        border-radius: 10px;

        transition: var(--transition);
    }

    .header-links:hover {
        background: var(--bg-secondary);
    }

    /* ===== LANG ===== */
    .lang-wrapper {
        width: 100%;
    }

    .lang-btn {
        width: 100%;
        justify-content: space-between;
        padding: 10px 12px;
        border-radius: 10px;
        background: var(--bg-secondary);
    }

    .lang-dropdown {
        width: 100%;
    }

    /* ===== THEME ===== */
    .theme-switch {
        margin-top: 10px;
    }

    .header-divider {
        display: none;
    }
}