/* ============================================================
   INVI STUDIO — Header / Navbar
   Mobile-first: base = mobile, @media (min-width:1025px) = desktop
   Uses dynamic viewport units (dvh) for proper mobile handling
   ============================================================ */

/* ── Mobile base styles ── */
@media (max-width: 1024px) {
    html {
        /* Ensure proper mobile viewport handling */
        -webkit-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
    }
    
    body {
        /* Prevent zoom on input focus in iOS */
        -webkit-text-size-adjust: 100%;
    }
}

/* ── Header wrapper (fixed top bar) ── */
.ww-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    padding: var(--ww-base-space-12) 0;
    transition: padding var(--ww-base-transition-normal);
}

.ww-header.ww-scrolled {
    padding: var(--ww-base-space-8) 0;
}

/* ── Container (centers + limits width) ── */
.ww-header__container {
    max-width: var(--ww-invi-page-max-width);
    margin: 0 auto;
    padding: 0 var(--ww-base-space-12);
    /* Prevent overflow on small screens */
    width: 100%;
    min-width: 0;
}

/* ── Content pill (glass bar) ── */
.ww-header__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--ww-base-space-12) var(--ww-base-space-16);
    border-radius: var(--ww-base-radius-12);
    position: relative;
}

/* Glass effect lives on ::before so that:
   1) backdrop-filter does NOT create a containing block for .ww-nav (position:fixed)
   2) On mobile, z-index:2 keeps the glass bar ABOVE the nav overlay (z-index:1)
   3) On desktop, isolation:isolate + z-index:-1 puts it behind content normally */
.ww-header__content::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--ww-invi-glass-bg);
    backdrop-filter: var(--ww-invi-glass-blur);
    -webkit-backdrop-filter: var(--ww-invi-glass-blur);
    border: 1px solid var(--ww-base-glass-05);
    z-index: 2;
    transition: background var(--ww-base-transition-normal),
                border-color var(--ww-base-transition-normal),
                box-shadow var(--ww-base-transition-normal);
}

.ww-header.ww-scrolled .ww-header__content::before {
    background: var(--ww-invi-header-bg-scrolled);
    border-color: var(--ww-invi-glass-border-hover);
    box-shadow: var(--ww-base-shadow-scrolled);
}

/* ── Logo ── */
.ww-logo {
    display: flex;
    align-items: center;
    gap: var(--ww-base-space-12);
    flex-shrink: 0;
    position: relative;
    z-index: 3;
}

.ww-logo__dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--ww-invi-accent-cyan);
    animation: ww-pulse 2s infinite;
    box-shadow: 0 0 10px var(--ww-base-glow-cyan-80);
}

.ww-logo__text {
    font-size: var(--ww-base-font-16);
    font-weight: var(--ww-base-weight-black);
    letter-spacing: -0.02em;
}

/* ── Navigation (mobile: fullscreen overlay, hidden by default) ── */
.ww-nav {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    padding: 5rem var(--ww-base-space-20) var(--ww-base-space-24);
    background: var(--ww-base-page-overlay-98);
    backdrop-filter: blur(32px) saturate(180%);
    -webkit-backdrop-filter: blur(32px) saturate(180%);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.ww-nav.ww-active {
    display: flex;
}

/* ── Menu sections container ── */
.ww-nav__sections {
    display: flex;
    flex-direction: column;
    gap: var(--ww-base-space-16);
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

/* ── Navigation section ── */
.ww-nav__section {
    display: flex;
    flex-direction: column;
    gap: var(--ww-base-space-4);
}

.ww-nav__section-title {
    display: none;
}

/* ── Navigation links with proper hierarchy ── */
.ww-nav__link {
    display: flex;
    align-items: center;
    padding: var(--ww-base-space-16) var(--ww-base-space-20);
    font-size: var(--ww-base-font-18);
    font-weight: var(--ww-base-weight-medium);
    color: var(--ww-base-glass-85);
    border-radius: var(--ww-base-radius-12);
    background: transparent;
    border: none;
    transition: all var(--ww-base-transition-fast);
    text-align: center;
    justify-content: center;
}

.ww-nav__link:hover,
.ww-nav__link:active {
    color: var(--ww-base-white);
    background: var(--ww-base-glass-border);
}

/* ── CTA button with prominent styling ── */
.ww-nav__cta {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--ww-base-space-16) var(--ww-base-space-24);
    font-size: var(--ww-base-font-16);
    font-weight: var(--ww-base-weight-semibold);
    background: var(--ww-base-glow-cyan-12);
    border: 1px solid var(--ww-base-glow-cyan-35);
    color: var(--ww-base-cyan-500);
    border-radius: var(--ww-base-radius-12);
    transition: all var(--ww-base-transition-fast);
    text-align: center;
}

.ww-nav__cta:hover {
    background: var(--ww-base-glow-cyan-orb);
    border-color: var(--ww-base-cyan-500);
}

/* ── Language switcher section ── */
.ww-nav__lang-section {
    margin-top: var(--ww-base-space-12);
    padding-top: var(--ww-base-space-16);
    border-top: 1px solid var(--ww-base-glass-06);
    display: flex;
    justify-content: center;
}

.ww-lang-switch {
    display: inline-flex;
    gap: 2px;
    padding: 3px;
    border-radius: var(--ww-base-radius-8);
    background: var(--ww-base-glass-05);
    border: 1px solid var(--ww-base-glass-border);
}

.ww-lang-switch__btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: var(--ww-base-font-12);
    font-weight: var(--ww-base-weight-semibold);
    color: var(--ww-invi-page-text-dim);
    background: transparent;
    transition: all var(--ww-base-transition-fast);
    letter-spacing: 0.05em;
}

.ww-lang-switch__btn:hover {
    color: var(--ww-base-white);
}

.ww-lang-switch__btn--active {
    background: var(--ww-invi-btn-primary-bg);
    color: var(--ww-base-white);
    box-shadow: 0 0 12px var(--ww-base-glow-cyan);
}

/* ── Hamburger toggle (visible on mobile by default) ── */
.ww-nav__mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--ww-base-space-8);
    color: var(--ww-base-white);
    position: relative;
    z-index: 3;
    -webkit-tap-highlight-color: transparent;
}

.ww-nav__icon-close {
    display: none;
}

.ww-nav__mobile-toggle.ww-active .ww-nav__icon-open {
    display: none;
}

.ww-nav__mobile-toggle.ww-active .ww-nav__icon-close {
    display: block;
}

/* ============================================================
   Desktop (≥ 1025px)
   Nav becomes horizontal bar, hamburger hides.
   ============================================================ */
@media (min-width: 1025px) {
    .ww-header {
        padding: var(--ww-base-space-20) 0;
        max-width: none;
        overflow-x: visible;
    }

    .ww-header.ww-scrolled {
        padding: var(--ww-base-space-12) 0;
    }

    .ww-header__container {
        padding: 0 var(--ww-invi-page-padding);
    }

    .ww-header__content {
        padding: var(--ww-base-space-16) var(--ww-base-space-24);
        border-radius: var(--ww-base-radius-16);
        isolation: isolate;
        overflow: visible;
    }

    .ww-header__content::before {
        z-index: -1;
    }

    .ww-logo {
        z-index: auto;
    }

    .ww-logo__text {
        font-size: var(--ww-base-font-20);
    }

    /* ── Nav: horizontal inline ── */
    /* Use .ww-nav.ww-nav to match specificity of .ww-nav.ww-active (0,2,0) */
    .ww-nav.ww-nav {
        display: flex;
        position: static;
        inset: auto;
        z-index: auto;
        flex-direction: row;
        align-items: center;
        gap: var(--ww-base-space-32);
        padding: 0;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        overflow-y: visible;
    }

    /* Flatten sections wrapper into a row */
    .ww-nav__sections {
        display: contents;
    }

    /* Flatten section into a row */
    .ww-nav__section {
        display: contents;
    }

    /* Hide section titles on desktop */
    .ww-nav__section-title {
        display: none;
    }

    /* Reset nav links to inline desktop style */
    .ww-nav__link {
        width: auto;
        text-align: left;
        padding: 0;
        font-size: var(--ww-base-font-14);
        font-weight: var(--ww-base-weight-medium);
        color: var(--ww-invi-link-color);
        border-radius: 0;
        background: transparent;
        border: none;
    }

    .ww-nav__link::before {
        display: none;
    }

    .ww-nav__link:hover,
    .ww-nav__link:active {
        color: var(--ww-invi-link-hover);
        background: transparent;
        border-color: transparent;
        transform: none;
    }

    /* Reset CTA to inline desktop style */
    .ww-nav__cta {
        width: auto;
        padding: 0.625rem 1.25rem;
        font-size: var(--ww-base-font-14);
        background: var(--ww-base-glass-border);
        border: 1px solid var(--ww-invi-glass-border-hover);
        color: var(--ww-base-white);
        border-radius: var(--ww-base-radius-8);
    }

    .ww-nav__cta::before {
        display: none;
    }

    .ww-nav__cta:hover {
        transform: scale(1.05);
        box-shadow: none;
    }

    /* Reset lang section to inline */
    .ww-nav__lang-section {
        display: contents;
    }

    .ww-lang-switch {
        margin: 0;
    }

    .ww-lang-switch__btn {
        padding: 0.375rem 0.625rem;
        font-size: var(--ww-base-font-12);
        min-width: auto;
    }

    /* ── Hide hamburger on desktop ── */
    .ww-nav__mobile-toggle {
        display: none;
    }
}