:root {
    /* Color system — white canvas, electric-blue accent */
    --canvas: #FFFFFF;
    --surface: #FFFFFF;
    --ink: #0B0B0F;
    --steel: #5B5F6B;
    --border: rgba(11, 11, 15, 0.12);
    --accent: #1D4EFF;
    --accent-dark: #0F33CC;
    --accent-hover: #103AE0;
    --accent-wash: rgba(29, 78, 255, 0.06);

    --radius: 6px;

    /* Typography */
    --font-display: "Cabinet Grotesk", system-ui, sans-serif;
    --font-body: "Satoshi", system-ui, sans-serif;
    --font-mono: "Geist Mono", ui-monospace, monospace;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    --space-32: 8rem;
    --space-48: 9rem;

    /* Motion */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 500ms;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: clamp(15px, 1.2vw, 18px);
}

body {
    font-family: var(--font-body);
    background: var(--canvas);
    color: var(--ink);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: var(--space-4);
    z-index: 100;
    padding: var(--space-2) var(--space-4);
    background: var(--ink);
    color: var(--canvas);
}

.skip-link:focus {
    left: var(--space-4);
}

/* Navigation */
.nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 50;
    background: var(--canvas);
    border-bottom: 1px solid var(--border);
}

.nav__inner {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.logo__mark {
    display: grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    background: var(--accent);
    color: var(--surface);
    font-size: 0.9375rem;
}

.nav__links {
    display: none;
    list-style: none;
    gap: var(--space-8);
    font-size: 0.9375rem;
    font-weight: 500;
}

.nav__links a {
    color: var(--steel);
    transition: color var(--duration-fast) var(--ease-out);
}

.nav__links a:hover,
.nav__links a:focus-visible {
    color: var(--ink);
}

.nav__cta {
    display: none;
    padding: var(--space-3) var(--space-6);
    min-height: 48px;
    border: 1.5px solid var(--accent);
    border-radius: var(--radius);
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: background var(--duration-fast), color var(--duration-fast);
}

.nav__cta:hover,
.nav__cta:focus-visible {
    background: var(--accent);
    color: #FFFFFF;
}

.nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--ink);
}

.nav__mobile {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--space-8) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    font-size: 1.5rem;
    font-family: var(--font-display);
    font-weight: 500;
}

.nav__mobile[hidden] {
    display: none;
}

.nav__mobile a {
    padding: var(--space-2) 0;
    color: var(--steel);
}

.nav__mobile a:hover {
    color: var(--ink);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 56px;
    padding: var(--space-4) var(--space-8);
    border: 1.5px solid var(--ink);
    border-radius: var(--radius);
    background: transparent;
    color: var(--ink);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}

.btn:hover,
.btn:focus-visible {
    background: var(--ink);
    color: var(--canvas);
}

.btn--solid {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--surface);
}

.btn--solid:hover,
.btn--solid:focus-visible {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: var(--surface);
}

/* Hero */
.hero {
    min-height: auto;
    max-width: 1600px;
    margin: 0 auto;
    padding: calc(5rem + var(--space-6)) var(--space-6) var(--space-16);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: var(--space-8);
}

.hero__top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--steel);
}

.hero__index {
    color: var(--accent);
    font-weight: 500;
}

.hero__center {
    margin-bottom: var(--space-8);
}

.hero__kicker {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: var(--space-4);
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 11vw, 9rem);
    font-weight: 800;
    line-height: 0.92;
    letter-spacing: -0.05em;
    max-width: 14ch;
}

.hero__bottom {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-8);
}

.hero__lead {
    font-size: 1.25rem;
    color: var(--steel);
    max-width: 45ch;
    margin-bottom: var(--space-6);
}

.hero__cta-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
}

.hero__price {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--steel);
}

/* Sections common */
.section {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-12) var(--space-6);
    border-top: 1px solid var(--border);
}

.section-index {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--accent-dark);
    font-weight: 500;
}

.section-name {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--steel);
}

/* Chatbot — stile conversazionale */
.chatbot__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.chatbot__label {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.chatbot__claim {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2.5rem);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    max-width: 28ch;
    margin-bottom: var(--space-4);
}

.chatbot {
    display: flex;
    flex-direction: column;
    max-width: 720px;
}

.chatbot__window {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    padding-bottom: var(--space-4);
    min-height: 320px;
    max-height: 560px;
    overflow-y: auto;
}

.chatbot__message {
    max-width: 85%;
    font-size: 1rem;
    line-height: 1.6;
}

.chatbot__message--bot {
    align-self: flex-start;
    color: var(--ink);
}

.chatbot__message--user {
    align-self: flex-end;
    color: var(--steel);
}

.chatbot__message p + p {
    margin-top: var(--space-2);
}

.chatbot__message a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.chatbot__options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.chatbot__chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--border);
    border-radius: 9999px;
    background: transparent;
    color: var(--ink);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast);
}

.chatbot__chip svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.chatbot__chip:hover,
.chatbot__chip:focus-visible {
    background: var(--canvas);
    border-color: var(--ink);
    outline: none;
}

.chatbot__input {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 4px 4px 4px var(--space-5);
    border: 1px solid var(--border);
    border-radius: 9999px;
    background: var(--surface);
    transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.chatbot__input:focus-within {
    border-color: var(--ink);
    box-shadow: 0 0 0 3px rgba(21, 21, 21, 0.06);
}

.chatbot__input input {
    flex: 1;
    min-height: 44px;
    padding: 0;
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: 1rem;
    color: var(--ink);
}

.chatbot__input input:focus-visible {
    outline: none;
}

.chatbot__input input::placeholder {
    color: var(--steel);
}

.chatbot__input[hidden] {
    display: none;
}

.chatbot__input button {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    color: #FFFFFF;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--duration-fast), transform var(--duration-fast);
}

.chatbot__input button svg {
    width: 18px;
    height: 18px;
}

.chatbot__input button:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.chatbot__input button:active {
    transform: scale(0.98);
}

.chatbot__audit {
    background: var(--canvas);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-6);
    margin-top: var(--space-2);
    text-align: left;
}

.chatbot__audit h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-4);
}

.chatbot__audit ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.chatbot__audit li {
    padding-left: var(--space-5);
    position: relative;
    color: var(--steel);
}

.chatbot__audit li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.chatbot__contacts {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--steel);
}

.chatbot__contacts a {
    color: var(--ink);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* Programma */
.programma__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--space-8);
}

.programma__label {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.programma__note {
    font-size: 1rem;
    color: var(--steel);
    max-width: 24ch;
    text-align: right;
}

.programma__list {
    list-style: none;
}

.programma__item {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding: var(--space-4) 0;
    border-top: 1px solid var(--border);
}

.programma__item:last-child {
    border-bottom: 1px solid var(--border);
}

.programma__time {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--steel);
}

.programma__content h3 {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-1);
}

.programma__content p {
    color: var(--steel);
    max-width: 55ch;
}

/* Iscrizione */
.tickets__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.tickets__label {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.tickets__claim {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    max-width: 24ch;
    margin-bottom: var(--space-4);
}

.tickets__text {
    font-size: 1.125rem;
    color: var(--steel);
    max-width: 55ch;
    margin-bottom: var(--space-6);
}

.tickets__book {
    margin-bottom: var(--space-8);
}

.ticket-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    max-width: 520px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.field label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--steel);
}

.field input {
    width: 100%;
    min-height: 56px;
    padding: var(--space-4);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--ink);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--duration-fast);
}

.field input::placeholder {
    color: var(--steel);
}

.field input:focus-visible {
    outline: none;
    border-color: var(--ink);
}

.tickets__note {
    margin-top: var(--space-4);
    font-size: 0.875rem;
    color: var(--steel);
}

/* Footer */
.footer {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer__logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.125rem;
}

.footer__copy {
    font-size: 0.875rem;
    color: var(--steel);
}

.footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-top: var(--space-2);
    font-size: 0.875rem;
}

.footer__links a {
    color: var(--steel);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
}

.footer__links a:hover {
    color: var(--ink);
    border-color: var(--ink);
}

/* Consent + form status */
.field--consent {
    margin-top: var(--space-2);
}

.field--consent .consent {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    text-transform: none;
    letter-spacing: normal;
    line-height: 1.5;
    color: var(--steel);
    cursor: pointer;
}

.consent input[type="checkbox"] {
    margin-top: 0.2em;
    width: 1.1em;
    height: 1.1em;
    flex-shrink: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.consent a {
    color: var(--ink);
    text-decoration: underline;
}

.form-status {
    margin-top: var(--space-3);
    font-size: 0.875rem;
    color: var(--accent);
}

.form-status--ok {
    color: var(--ink);
}

/* Reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .btn,
    .nav__cta,
    .nav__links a {
        transition: none;
    }
}

/* Tablet */
@media (min-width: 768px) {
    .nav__toggle,
    .nav__mobile {
        display: none;
    }

    .nav__links {
        display: flex;
    }

    .nav__cta {
        display: inline-flex;
    }

    .hero {
        padding-top: calc(5rem + var(--space-6));
    }

    .hero__bottom {
        flex-direction: row;
        align-items: flex-end;
        justify-content: space-between;
    }

    .chatbot__grid,
    .tickets__grid {
        grid-template-columns: 200px 1fr;
        gap: var(--space-8);
    }

    .programma__item {
        grid-template-columns: 120px 1fr;
        gap: var(--space-12);
        align-items: baseline;
    }

    .ticket-form {
        flex-direction: row;
        align-items: flex-end;
        max-width: 640px;
    }

    .field {
        flex: 1;
    }

    .footer {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .nav__inner,
    .hero,
    .section,
    .footer {
        padding-left: var(--space-12);
        padding-right: var(--space-12);
    }

    .section {
        padding-top: var(--space-16);
        padding-bottom: var(--space-16);
    }
}