/* --- 1. GLOBAL VARIABLES & RESET --- */
:root {
    /* BRAND COLORS */
    --brand-primary: #01d37d;
    --brand-secondary: #004745;
    --brand-accent: #39d6a0;
    --bg-dark: #044340;
    --bg-light: #edf6f3;

    /* UI COLORS */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);

    /* TEXT COLORS */
    --text-white: #ffffff;
    --text-dark: #1f2937;
    --text-grey: #666666;
    --text-light: rgba(255, 255, 255, 0.7);

    /* FUNCTIONAL */
    --accent-red: #ff4757;

    /* LAYOUT VARIABLES */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 6.25rem;
    --container-width: 87.5rem;
    --legal-card-max: 75rem;
    --onboarding-shell-max: 100rem;
    --onboarding-grid-max: 90rem;
    --onboarding-card-max: 17rem;
    --onboarding-card-min-height: 32rem;
    --measure-wide: 37.5rem;
    --space-1: clamp(0.25rem, 0.2rem + 0.2vw, 0.375rem);
    --space-2: clamp(0.5rem, 0.45rem + 0.2vw, 0.75rem);
    --space-3: clamp(0.75rem, 0.65rem + 0.35vw, 1rem);
    --space-4: clamp(1rem, 0.85rem + 0.6vw, 1.5rem);
    --space-5: clamp(1.25rem, 1rem + 1vw, 2rem);
    --space-6: clamp(1.5rem, 1.15rem + 1.4vw, 3rem);
    --space-10: clamp(2.5rem, 2rem + 2vw, 4rem);
    --static-shell-padding-block: clamp(7rem, 9vw, 10rem);
    --static-shell-padding-inline: clamp(1rem, 2.5vw, 2rem);
    --static-card-padding: clamp(1.5rem, 5vw, 4rem);
    --onboarding-card-padding-block: clamp(1.5rem, 2vw, 2.5rem);
    --onboarding-card-padding-inline: clamp(1.25rem, 3vw, 3.75rem);

    /* TYPOGRAPHY TOKENS */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.75rem;
    --font-size-display: clamp(2.5rem, 5vw, 3.5rem);

    /* SURFACES, BORDERS & SHADOWS */
    --surface-base: var(--text-white);
    --surface-muted: var(--bg-light);
    --border-subtle: color-mix(in srgb, var(--brand-secondary) 10%, transparent);
    --border-strong: color-mix(in srgb, var(--brand-primary) 45%, transparent);
    --surface-tint: color-mix(in srgb, var(--brand-primary) 5%, var(--surface-base));
    --surface-tint-strong: color-mix(in srgb, var(--brand-primary) 10%, var(--surface-base));
    --shadow-elevated: 0 1.25rem 3.125rem rgb(0 0 0 / 20%);
    --shadow-interactive: 0 0.625rem 1.25rem color-mix(in srgb, var(--brand-primary) 35%, transparent);

    /* Z-INDEX LAYERS */
    --z-back: -1;
    --z-normal: 1;
    --z-float: 10;
    --z-sticky: 100;
    --z-nav: 1000;
    --z-skip: 9999;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* ACCESSIBILITY FOCUS DEFAULTS */
:focus-visible {
    outline: 0.125rem solid var(--brand-accent);
    outline-offset: 0.25rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        sans-serif;
    overflow-x: hidden;
    background: var(--bg-dark);
    color: var(--text-white);
}

/* SKIP LINK (For Keyboard Users) */
.skip-link {
    background: var(--brand-accent);
    color: var(--text-dark);
    font-weight: 700;
    padding: 1rem;
    position: absolute;
    inset-block-start: 0;
    inset-inline-start: 0;
    z-index: 999;
    transform: translateY(-150%);
    transition: transform 0.3s;
    text-decoration: none;
}

.skip-link:focus {
    transform: translateY(0);
}

/* --- 2. NAVIGATION --- */
.tech-nav {
    position: absolute;
    inset-block-start: clamp(0.75rem, 0.6rem + 0.7vw, 1.25rem);
    inset-inline-start: 50%;
    transform: translateX(-50%);
    width: min(96%, 78rem);
    min-block-size: 3.625rem;
    background: var(--bg-light);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: clamp(0.5rem, 1vw, 1rem);
    padding: 0 clamp(0.85rem, 2vw, 1.75rem);
    z-index: var(--z-nav);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav-logo-img {
    block-size: 100%;
    inline-size: auto;
    max-inline-size: none;
    display: block;
}

.nav-logo {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.03125rem;
    color: var(--text-dark);
    text-decoration: none;
    display: flex;
    align-items: center;
    block-size: 2.1875rem;
    flex: 0 0 auto;
}

.nav-menu {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.5rem;
    justify-self: stretch;
    min-inline-size: 0;
    margin-inline-start: clamp(0.25rem, 1vw, 0.75rem);
}

.nav-links {
    display: flex;
    gap: clamp(0.85rem, 1.6vw, 1.6rem);
    list-style: none;
    justify-self: center;
    flex-wrap: wrap;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-self: end;
}

.nav-lang {
    position: relative;
    justify-self: end;
}

.lang-current {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    border: 1px solid color-mix(in srgb, var(--brand-primary) 26%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, var(--brand-primary) 12%, white);
    color: var(--text-dark);
    padding: 0.32rem 0.62rem 0.32rem 0.42rem;
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.lang-current:hover,
.lang-current:focus-visible {
    background: color-mix(in srgb, var(--brand-primary) 24%, white);
    border-color: color-mix(in srgb, var(--brand-primary) 40%, transparent);
}

.lang-flag {
    inline-size: 1rem;
    block-size: 1rem;
    flex: 0 0 1rem;
    display: inline-block;
    object-fit: cover;
    border-radius: 0.15rem;
}

.lang-current-code {
    line-height: 1;
}

.lang-caret {
    inline-size: 0.45rem;
    block-size: 0.45rem;
    border-inline-end: 2px solid currentColor;
    border-block-end: 2px solid currentColor;
    transform: rotate(45deg) translateY(-0.06rem);
    transition: transform 0.2s ease;
}

.nav-lang[data-lang-open="true"] .lang-caret {
    transform: rotate(-135deg) translateY(-0.02rem);
}

.lang-menu {
    position: absolute;
    inset-inline-end: 0;
    inset-block-start: calc(100% + 0.38rem);
    display: none;
    list-style: none;
    margin: 0;
    padding: 0.3rem;
    min-inline-size: 5.35rem;
    border: 1px solid color-mix(in srgb, var(--brand-primary) 22%, transparent);
    border-radius: 0.85rem;
    background: var(--bg-light);
    box-shadow: 0 0.75rem 1.875rem rgb(0 0 0 / 14%);
}

.nav-lang[data-lang-open="true"] .lang-menu {
    display: block;
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    text-decoration: none;
    color: var(--text-dark);
    border-radius: 0.6rem;
    padding: 0.45rem 0.55rem;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.lang-option:hover,
.lang-option:focus-visible {
    background: color-mix(in srgb, var(--brand-primary) 22%, transparent);
}

.lang-option-code {
    line-height: 1;
}

.nav-link {
    position: relative;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-dark);
    text-decoration: none;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    block-size: 0.125rem;
    inset-block-end: -0.125rem;
    inset-inline-start: 50%;
    background-color: var(--brand-accent);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--bg-dark);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    justify-self: end;
}

.nav-toggle {
    display: none;
    inline-size: 2.75rem;
    block-size: 2.75rem;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--text-dark);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
}

.nav-toggle-icon {
    position: relative;
    display: block;
    inline-size: 1.25rem;
    block-size: 0.125rem;
    border-radius: 999px;
    background: currentColor;
    transition: transform 0.25s ease, background-color 0.25s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: "";
    position: absolute;
    inset-inline-start: 0;
    inline-size: 100%;
    block-size: 0.125rem;
    border-radius: 999px;
    background: currentColor;
    transition: transform 0.25s ease, inset-block-start 0.25s ease,
        inset-block-end 0.25s ease;
}

.nav-toggle-icon::before {
    inset-block-start: -0.375rem;
}

.nav-toggle-icon::after {
    inset-block-end: -0.375rem;
}

.tech-nav[data-menu-open="true"] .nav-toggle-icon {
    background: transparent;
}

.tech-nav[data-menu-open="true"] .nav-toggle-icon::before {
    inset-block-start: 0;
    transform: rotate(45deg);
}

.tech-nav[data-menu-open="true"] .nav-toggle-icon::after {
    inset-block-end: 0;
    transform: rotate(-45deg);
}

@media (hover: hover) {
    .nav-cta:hover {
        background: var(--brand-accent);
        color: var(--text-dark);
    }
}

/* FOOTER */
.site-footer {
    background-color: var(--bg-dark);
    padding: clamp(3rem, 5vw, 5rem) clamp(1rem, 2vw, 1.25rem)
        clamp(2rem, 3vw, 2.5rem);
    font-size: 0.95rem;
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr; /* Desktop: 3 colonne */
    align-items: start;
    gap: clamp(2rem, 3vw, 3rem);
}

.footer-brand .brand-description {
    color: var(--text-light);
    margin: 1.25rem 0;
    max-width: 18.75rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--brand-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    inline-size: 2rem;
    block-size: 2rem;
    border-radius: 50%;
    transition: transform 0.3s ease;
}

.social-links a svg {
    inline-size: 1.25rem;
    block-size: 1.25rem;
    fill: currentColor;
    display: block;
}

.social-links a:hover {
    transform: translateY(-0.1875rem);
}

.footer-title {
    color: var(--brand-accent);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--brand-accent);
}

.qr-group {
    display: flex;
    gap: 1.5rem;
}

.qr-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    font-size: 0.75rem;
}

.qr-item img {
    width: 5.625rem;
    height: 5.625rem;
    background: white;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
}

.footer-bottom {
    max-width: var(--container-width);
    margin: 3.75rem auto 0;
    padding-block-start: 1.5rem;
    border-block-start: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
}

/* PRIVACY TOAST */
.privacy-toast {
    position: fixed;
    inset-inline-start: clamp(1rem, 2.5vw, 1.5rem);
    inset-block-end: clamp(1rem, 2.5vw, 1.5rem);
    z-index: 900;
    max-inline-size: min(28rem, calc(100vw - 2rem));
    padding: 1rem 2.25rem 1rem 1.125rem;
    border-radius: 1.25rem;
    border: 1px solid var(--border-subtle);
    background: var(--surface-base);
    color: var(--text-dark);
    box-shadow: var(--shadow-elevated);
    opacity: 0;
    transform: translateY(1.25rem);
    pointer-events: none;
}

.privacy-toast-close {
    position: absolute;
    inset-inline-end: 0.5rem;
    inset-block-start: 0.4rem;
    inline-size: 1.75rem;
    block-size: 1.75rem;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--text-grey);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
}

.privacy-toast-close:hover {
    background: var(--surface-muted);
    color: var(--text-dark);
}

.privacy-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.privacy-toast-text {
    margin: 0 0 0.625rem;
    font-size: 0.875rem;
    line-height: 1.45;
    color: var(--text-dark);
}

.privacy-toast-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--bg-dark);
    text-underline-offset: 0.125rem;
}

.privacy-toast-link:hover {
    color: var(--brand-secondary);
}

/* --- ANIMATIONS --- */
@keyframes scrollUp {
    0% { transform: translateY(0); }
    100% { transform: translateY(-50%); }
}

@keyframes scrollDown {
    0% { transform: translateY(-50%); }
    100% { transform: translateY(0); }
}

@keyframes scrollLeft {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes scrollRight {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(0.625rem); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─────────────────────────────────────────────────────────────────────────────
   RESPONSIVE — 3 fasce:
   Desktop:      width > 48rem       → stili base (nessuna query)
   Tablet Mini:  28rem < width ≤ 48rem
   Mobile:       width ≤ 28rem
───────────────────────────────────────────────────────────────────────────── */

/* ─── Tablet Mini: iPad Mini, tablet stretti (28rem < width ≤ 48rem) ──────── */
@media (width <= 48rem) {
    .tech-nav {
        overflow: visible;
        width: min(97%, 70rem);
        grid-template-columns: auto 1fr auto auto;
        gap: 0.5rem;
        padding-inline: 0.75rem;
        min-block-size: 3.25rem;
    }

    .nav-links {
        gap: 0.95rem;
    }

    .nav-cta {
        padding: 0.46rem 0.9rem;
        font-size: 0.85rem;
    }

    .nav-toggle {
        display: inline-flex;
        justify-self: end;
    }

    .nav-menu {
        position: absolute;
        inset-inline: 0;
        inset-block-start: calc(100% + 0.375rem);
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0.875rem;
        margin-inline-start: 0;
        padding: 0.875rem;
        border-radius: 1.125rem;
        border: 1px solid var(--glass-border);
        background: var(--bg-light);
        box-shadow: 0 0.75rem 1.875rem rgb(0 0 0 / 14%);
    }

    .tech-nav[data-menu-open="true"] .nav-menu {
        display: flex;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.25rem;
    }

    .nav-actions {
        align-items: stretch;
        gap: 0.5rem;
    }

    .nav-link {
        display: block;
        padding: 0.625rem 0.75rem;
        border-radius: 0.75rem;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:focus-visible,
    .nav-link:hover {
        background: color-mix(in srgb, var(--brand-primary) 12%, transparent);
    }

    .nav-cta {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        inline-size: 100%;
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
    }

    .nav-lang {
        justify-self: end;
    }

    .lang-current {
        padding: 0.3rem 0.55rem 0.3rem 0.4rem;
        font-size: 0.78rem;
    }

    .lang-menu {
        inset-inline-end: 0;
        min-inline-size: 5rem;
    }

    /* Footer a colonna singola da tablet mini in giù */
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }

    .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-brand .brand-description {
        text-align: center;
        max-width: 100%;
    }

    .social-links {
        justify-content: center;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .qr-group {
        justify-content: center;
        flex-wrap: wrap;
    }

    .footer-bottom {
        text-align: center;
    }

    .privacy-toast {
        inset-inline: 0.75rem;
        inset-block-end: 0.75rem;
        max-inline-size: none;
    }

    .tab-btn {
        flex: 1;
        padding: 0.75rem 0;
        text-align: center;
        font-size: 0.9rem;
    }
}

/* ─── Mobile: smartphone (width ≤ 28rem) ──────────────────────────────────── */
@media (width <= 28rem) {
    .tech-nav {
        gap: 0.35rem;
        padding-inline: 0.55rem;
        min-block-size: 3rem;
    }

    .nav-logo {
        block-size: 1.95rem;
    }

    .lang-current {
        padding-inline: 0.45rem;
        font-size: 0.72rem;
    }

    .lang-current-code {
        min-inline-size: 1.35rem;
        text-align: center;
    }

    .lang-flag {
        inline-size: 0.9rem;
        block-size: 0.9rem;
        flex-basis: 0.9rem;
    }

    .nav-toggle {
        inline-size: 2.5rem;
        block-size: 2.5rem;
    }
}