/* MiYaYa — mobile + language switcher */
.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.2rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

.lang-switch button {
    appearance: none;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.75);
    font: inherit;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.35rem 0.55rem;
    border-radius: 999px;
    cursor: pointer;
    min-height: 32px;
    line-height: 1;
}

.lang-switch button.active {
    background: rgba(79, 172, 254, 0.35);
    color: #fff;
}

.lang-switch button:focus-visible {
    outline: 2px solid #4facfe;
    outline-offset: 1px;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    overflow-x: hidden;
}

img, video, iframe {
    max-width: 100%;
    height: auto;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: auto;
}

.nav-actions .nav-links {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    padding: 0;
    z-index: 1002;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 24, 0.55);
    z-index: 999;
}

.nav-backdrop.show { display: block; }

@media (max-width: 900px) {
    .nav-toggle { display: inline-flex; }

    header nav.container,
    header .header-inner {
        gap: 0.75rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: min(86vw, 320px);
        height: 100vh;
        height: 100dvh;
        margin: 0;
        padding: calc(4.5rem + env(safe-area-inset-top)) 1.25rem 2rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.35rem !important;
        background: rgba(26, 26, 46, 0.97);
        backdrop-filter: blur(18px);
        box-shadow: -12px 0 40px rgba(0, 0, 0, 0.35);
        transform: translateX(105%);
        transition: transform 0.25s ease;
        z-index: 1001;
        overflow-y: auto;
        display: flex !important;
        list-style: none;
    }

    .nav-links.open {
        transform: translateX(0);
    }

    .nav-links li { width: 100%; }

    .nav-links a {
        display: block;
        padding: 0.85rem 0.75rem;
        border-radius: 12px;
        font-size: 1rem;
    }

    .nav-links a::after { display: none !important; }

    .nav-links a:hover,
    .nav-links a:active {
        background: rgba(255, 255, 255, 0.08);
    }

    #authLinks {
        display: flex;
        flex-direction: column;
        gap: 0.6rem;
        margin-top: 0.75rem;
        padding-top: 0.75rem;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
    }

    .btn-login,
    .btn-register {
        margin-left: 0 !important;
        text-align: center;
        padding: 0.75rem 1rem !important;
    }

    .hero {
        padding-top: 6.5rem !important;
        padding-bottom: 3rem !important;
        min-height: auto !important;
    }

    .hero-content h1 {
        font-size: clamp(1.7rem, 7vw, 2.4rem) !important;
    }

    .hero .subtitle {
        font-size: 1rem !important;
        padding: 0 0.25rem;
    }

    .cta-group .btn,
    .product-cta .btn {
        width: 100%;
        max-width: 320px;
        justify-content: center;
        min-height: 48px;
    }

    .floating-badge { display: none !important; }

    .product-showcase,
    .video-section,
    .about-section,
    .features,
    .faq-section {
        padding-left: 0.25rem;
        padding-right: 0.25rem;
    }

    .features-grid {
        grid-template-columns: 1fr !important;
    }

    .faq-grid {
        grid-template-columns: 1fr !important;
    }

    footer {
        padding: 2rem 1rem !important;
        font-size: 0.85rem;
        text-align: center;
    }

    footer p { line-height: 1.55; }
}

@media (max-width: 640px) {
    .container {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }

    .lang-switch button {
        padding: 0.3rem 0.45rem;
        font-size: 0.68rem;
    }

    .card {
        padding: 1.75rem 1.25rem !important;
        border-radius: 20px !important;
    }

    /* Dashboard header */
    .header-inner {
        flex-wrap: wrap;
        row-gap: 0.65rem;
    }

    .header-right {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 0.45rem !important;
    }

    .child-select {
        flex: 1 1 140px;
        min-width: 0;
        max-width: 100%;
    }

    .tabs {
        display: flex;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 0.35rem;
        padding-bottom: 0.15rem;
    }

    .tabs::-webkit-scrollbar { display: none; }

    .tab-btn {
        flex: 0 0 auto !important;
        white-space: nowrap;
        min-height: 42px;
    }

    .settings-btn,
    .logout-btn {
        min-height: 40px;
        padding: 0.45rem 0.7rem;
        font-size: 0.8rem;
    }

    .streak-pill span:last-child {
        max-width: 4.5rem;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

@media (max-width: 400px) {
    .user-chip { display: none; }
    .streak-pill { padding: 0.4rem 0.6rem; font-size: 0.8rem; }
}

@supports (padding: max(0px)) {
    body {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    header {
        padding-top: max(0.5rem, env(safe-area-inset-top));
    }
}