/* =========================================================
   YouECOM S.r.l. — foglio di stile principale
   Font di sistema (nessuna chiamata a servizi esterni)
   ========================================================= */

:root {
    --paper: #F4F2EC;
    --paper-2: #EBE8DF;
    --card: #FBFAF7;
    --ink: #0E1A2B;
    --ink-2: #3B4656;
    --ink-3: #6B7480;
    --line: #D8D4C8;
    --signal: #F2542D;
    --signal-ink: #C23A17;
    --live: #1FB57A;
    --band: #0E1A2B;
    --band-2: #16263C;
    --band-text: #E8E6DF;
    --band-muted: #9AA6B6;

    --f-display: "Segoe UI Variable Display", "SF Pro Display", "Helvetica Neue", "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    --f-text: "Segoe UI Variable Text", "SF Pro Text", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --f-mono: ui-monospace, "Cascadia Code", "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

    --wrap: 1180px;
    --gutter: clamp(16px, 4vw, 40px);
    --radius: 14px;
    --shadow: 0 1px 0 rgba(14, 26, 43, .04), 0 12px 32px -18px rgba(14, 26, 43, .25);
}

@media (prefers-color-scheme: dark) {
    :root {
        --paper: #0B1422;
        --paper-2: #101C2E;
        --card: #122036;
        --ink: #EDEBE4;
        --ink-2: #C3C8D0;
        --ink-3: #8F99A8;
        --line: #24344C;
        --signal: #FF6A42;
        --signal-ink: #FF8A6A;
        --band: #060C16;
        --band-2: #0F1A2B;
        --shadow: 0 1px 0 rgba(0, 0, 0, .2), 0 16px 36px -20px rgba(0, 0, 0, .7);
    }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--f-text);
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--f-display); line-height: 1.1; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.mono { font-family: var(--f-mono); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px; }

/* ---------- Bottoni ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5em;
    font: 600 15px/1 var(--f-text);
    padding: 15px 22px; border-radius: 999px;
    background: var(--ink); color: var(--paper);
    border: 1px solid var(--ink);
    text-decoration: none; cursor: pointer;
    transition: transform .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-1px); background: var(--signal); border-color: var(--signal); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: transparent; color: var(--signal-ink); border-color: var(--signal); }
.btn-light { background: var(--band-text); color: var(--band); border-color: var(--band-text); margin-top: 28px; }
.btn-sm { padding: 10px 16px; font-size: 14px; }
.btn[disabled] { opacity: .6; cursor: progress; transform: none; }

/* ---------- Header ---------- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--paper) 86%, transparent);
    backdrop-filter: saturate(1.4) blur(12px);
    -webkit-backdrop-filter: saturate(1.4) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color .2s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 32px; height: 32px; color: var(--ink); }
.brand-mark path { stroke: var(--paper); }
.site-footer .brand-mark path { stroke: var(--band); }
.brand-word { font: 500 21px/1 var(--f-display); letter-spacing: -0.02em; }
.brand-word b { font-weight: 800; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a:not(.btn) { text-decoration: none; font-size: 15px; color: var(--ink-2); position: relative; }
.nav a:not(.btn)::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--signal); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.nav a:not(.btn):hover { color: var(--ink); }
.nav a:not(.btn):hover::after, .nav a.active::after { transform: scaleX(1); }
.nav a.active { color: var(--ink); }

.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: transparent; cursor: pointer; padding: 0; position: relative; }
.nav-toggle span { position: absolute; left: 12px; right: 12px; height: 2px; background: var(--ink); transition: transform .2s ease, top .2s ease; }
.nav-toggle span:first-child { top: 17px; }
.nav-toggle span:last-child { top: 25px; }
.nav-toggle[aria-expanded="true"] span:first-child { top: 21px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { top: 21px; transform: rotate(-45deg); }

@media (max-width: 900px) {
    .nav-toggle { display: block; }
    .nav {
        position: fixed; inset: 72px 0 auto 0;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--paper); border-bottom: 1px solid var(--line);
        padding: 8px var(--gutter) 24px;
        transform: translateY(-8px); opacity: 0; visibility: hidden;
        transition: opacity .2s ease, transform .2s ease, visibility .2s;
    }
    .nav.open { transform: none; opacity: 1; visibility: visible; }
    .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
    .nav a:not(.btn)::after { display: none; }
    .nav .btn { margin-top: 18px; }
}

/* ---------- Elementi comuni ---------- */
.eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    font: 500 13px/1 var(--f-mono); text-transform: uppercase; letter-spacing: .12em;
    color: var(--signal-ink); margin-bottom: 18px;
}
.eyebrow-on-dark { color: var(--signal); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--signal); display: inline-block; }
.dot.live { background: var(--live); box-shadow: 0 0 0 0 rgba(31, 181, 122, .6); animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(31,181,122,.55); } 70% { box-shadow: 0 0 0 8px rgba(31,181,122,0); } 100% { box-shadow: 0 0 0 0 rgba(31,181,122,0); } }
@media (prefers-reduced-motion: reduce) { .dot.live { animation: none; } }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    padding: clamp(48px, 8vw, 104px) 0 0;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 56px 56px;
    background-position: -1px -1px;
}
.hero::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(ellipse 80% 70% at 30% 35%, transparent 0%, var(--paper) 72%);
}
.hero > * { position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: clamp(36px, 5vw, 62px); font-weight: 800; letter-spacing: -0.035em; }
.hero h1 .hl { color: var(--ink-3); font-weight: 600; }
.lead { font-size: clamp(17px, 1.5vw, 19px); color: var(--ink-2); max-width: 58ch; margin-top: 26px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

/* Pannello call-trace */
.trace {
    background: var(--band); color: var(--band-text);
    border-radius: var(--radius); overflow: hidden;
    box-shadow: 0 30px 60px -30px rgba(14, 26, 43, .55);
    border: 1px solid color-mix(in srgb, var(--line) 60%, rgba(255,255,255,.08));
    transform: rotate(1.2deg);
}
.trace-head { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 12px; color: var(--band-muted); }
.trace-dots { display: inline-flex; gap: 6px; }
.trace-dots i { width: 10px; height: 10px; border-radius: 50%; background: #2A3A52; }
.trace-status { margin-left: auto; display: inline-flex; align-items: center; gap: 8px; color: var(--live); text-transform: uppercase; letter-spacing: .1em; }
.trace-body { padding: 14px 16px 18px; font-size: 12.5px; line-height: 1.5; min-height: 300px; }
.trace-body li { display: grid; grid-template-columns: 92px 64px 1fr; gap: 10px; padding: 6px 0; border-bottom: 1px dashed rgba(255,255,255,.06); }
.trace-body li:last-child { border-bottom: 0; }
.trace-body time { color: #5F6E84; }
.trace-body b { font-weight: 600; }
.trace-body [data-k="sip"] b { color: #7FB2FF; }
.trace-body [data-k="sys"] b { color: var(--live); }
.trace-body [data-k="you"] b { color: #F5C66B; }
.trace-body [data-k="ai"] b { color: var(--signal); }
.trace-body [data-k="api"] b { color: #B99CFF; }
.trace-body span { color: #D6DAE1; }
.js .trace-body li { opacity: 0; transform: translateY(4px); transition: opacity .35s ease, transform .35s ease; }
.js .trace-body li.on { opacity: 1; transform: none; }
@media (max-width: 520px) {
    .trace-body li { grid-template-columns: 1fr; gap: 0; }
    .trace-body time { font-size: 11px; }
}

.pillars {
    display: grid; grid-template-columns: repeat(5, 1fr);
    margin-top: clamp(56px, 8vw, 96px);
    border-top: 1px solid var(--ink);
}
.pillars li { padding: 18px 16px 26px 0; font: 600 15px/1.3 var(--f-display); display: flex; flex-direction: column; gap: 6px; }
.pillars li + li { padding-left: 16px; border-left: 1px solid var(--line); }
.pillars .mono { font-size: 12px; color: var(--signal-ink); font-weight: 500; }

@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; }
    .trace { transform: none; max-width: 560px; }
    .pillars { grid-template-columns: repeat(2, 1fr); }
    .pillars li, .pillars li + li { padding: 16px 12px 16px 0; border-left: 0; border-bottom: 1px solid var(--line); }
}

/* ---------- Sezioni ---------- */
.section { padding: clamp(72px, 10vw, 128px) 0; }
.section-alt { background: var(--paper-2); }
.section-head { max-width: 720px; margin-bottom: clamp(36px, 5vw, 56px); }
.section-head h2 { font-size: clamp(30px, 3.8vw, 46px); font-weight: 750; }
.section-head p:not(.eyebrow) { color: var(--ink-2); margin-top: 18px; font-size: 18px; }
.section-head p + p:not(.eyebrow) { margin-top: 14px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.split .section-head { margin-bottom: 0; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }

/* Card servizi */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 28px 26px 24px; display: flex; flex-direction: column;
    transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card:hover { border-color: var(--ink-3); transform: translateY(-3px); box-shadow: var(--shadow); }
.card-ico { width: 44px; height: 44px; border-radius: 12px; background: var(--paper-2); display: grid; place-items: center; margin-bottom: 22px; color: var(--signal-ink); }
.card-ico svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--ink-2); font-size: 15.5px; flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 20px; }
.tags li { font: 500 12px/1 var(--f-mono); padding: 6px 9px; border-radius: 6px; background: var(--paper-2); color: var(--ink-2); }
@media (max-width: 960px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }

/* Band Voice AI */
.band { background: var(--band); color: var(--band-text); position: relative; overflow: hidden; }
.band::after {
    content: ""; position: absolute; right: -180px; top: -180px; width: 520px; height: 520px; pointer-events: none;
    background: repeating-radial-gradient(circle, rgba(242,84,45,.18) 0 1px, transparent 1px 34px);
    border-radius: 50%;
    -webkit-mask-image: radial-gradient(circle, #000 30%, transparent 70%);
            mask-image: radial-gradient(circle, #000 30%, transparent 70%);
}
.band > * { position: relative; z-index: 1; }
.band .section-head p:not(.eyebrow) { color: var(--band-muted); }

.flow { counter-reset: f; border-left: 1px solid rgba(255,255,255,.12); }
.flow li { display: grid; grid-template-columns: 56px 1fr; gap: 6px; padding: 0 0 30px 0; position: relative; }
.flow li:last-child { padding-bottom: 0; }
.flow li::before { content: ""; position: absolute; left: -5px; top: 6px; width: 9px; height: 9px; border-radius: 50%; background: var(--signal); }
.flow-n { font-size: 12px; color: var(--band-muted); padding: 4px 0 0 22px; }
.flow h3 { font-size: 19px; font-weight: 700; margin-bottom: 6px; }
.flow p { color: var(--band-muted); font-size: 15.5px; }

.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: clamp(48px, 7vw, 80px); background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius); overflow: hidden; }
.features li { background: var(--band-2); padding: 24px 22px; display: flex; flex-direction: column; gap: 6px; }
.features b { font: 700 16px/1.25 var(--f-display); }
.features span { color: var(--band-muted); font-size: 14.5px; }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .features { grid-template-columns: 1fr; } }

/* Stack tecnologico */
.stack { border-top: 1px solid var(--ink); }
.stack-row { display: grid; grid-template-columns: 260px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.stack-row h3 { font-size: 13px; font-weight: 500; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); }
.stack-row ul { display: flex; flex-wrap: wrap; gap: 8px 10px; }
.stack-row li { font: 600 17px/1.3 var(--f-display); padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); transition: border-color .15s ease, color .15s ease; }
.stack-row li:hover { border-color: var(--signal); color: var(--signal-ink); }
@media (max-width: 720px) { .stack-row { grid-template-columns: 1fr; gap: 12px; } }

/* Metodo */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: s; }
.steps li { border-top: 3px solid var(--ink); padding-top: 22px; }
.steps li:first-child { border-top-color: var(--signal); }
.step-n { display: block; font-size: 13px; color: var(--signal-ink); margin-bottom: 26px; }
.steps h3 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.steps p { color: var(--ink-2); font-size: 15.5px; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); row-gap: 40px; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* Azienda */
.values { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.values li { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.values h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.values h3::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--signal); flex: none; }
.values p { color: var(--ink-2); font-size: 15px; }
@media (max-width: 520px) { .values { grid-template-columns: 1fr; } }

/* Contatti */
.contact-list { margin: 34px 0 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.contact-list div { display: grid; grid-template-columns: 90px 1fr; padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-list dt { font-size: 12px; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); padding-top: 3px; }
.contact-list dd { margin: 0; font-weight: 600; }
.contact-list a { text-decoration-color: var(--signal); text-underline-offset: 3px; }

.form { background: var(--card); border: 1px solid var(--line); border-radius: calc(var(--radius) + 4px); padding: clamp(22px, 3.5vw, 36px); display: grid; gap: 16px; box-shadow: var(--shadow); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 7px; }
.field > span { font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.field input, .field select, .field textarea {
    width: 100%; font: inherit; font-size: 16px; color: var(--ink);
    background: var(--paper); border: 1px solid var(--line); border-radius: 10px;
    padding: 12px 14px; transition: border-color .15s ease, box-shadow .15s ease;
}
.field textarea { resize: vertical; min-height: 130px; }
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 40px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px color-mix(in srgb, var(--signal) 25%, transparent); }
.field .invalid, .field input.invalid, .field textarea.invalid { border-color: var(--signal); }
.check { display: grid; grid-template-columns: 20px 1fr; gap: 12px; font-size: 14px; color: var(--ink-2); align-items: start; }
.check input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--signal); }
.check.invalid span { color: var(--signal-ink); }
.check a { text-underline-offset: 3px; }
.hp { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 4px; }
.form-msg { font-size: 14.5px; font-weight: 600; }
.form-msg.ok { color: var(--live); }
.form-msg.err { color: var(--signal-ink); }

/* ---------- Footer ---------- */
.site-footer { background: var(--band); color: var(--band-text); padding: 64px 0 28px; }
.site-footer .brand { color: var(--band-text); }
.site-footer .brand-mark { color: var(--band-text); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-tag { color: var(--band-muted); font-size: 15px; margin-top: 16px; max-width: 36ch; }
.footer-nav { display: grid; gap: 10px; align-content: start; }
.footer-nav a { color: var(--band-muted); text-decoration: none; font-size: 15px; }
.footer-nav a:hover { color: var(--band-text); }
.legal { font-style: normal; font-size: 13.5px; line-height: 1.75; color: var(--band-muted); }
.legal b { color: var(--band-text); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding-top: 24px; font-size: 13px; color: var(--band-muted); }
.footer-bottom a { color: var(--band-muted); text-decoration: none; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- Comparsa allo scroll ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .js .reveal, .js .trace-body li { opacity: 1; transform: none; transition: none; }
}

/* ---------- Pagine interne (privacy, 404) ---------- */
.page { padding: clamp(56px, 8vw, 96px) 0; }
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(34px, 4.5vw, 52px); font-weight: 800; margin-bottom: 12px; }
.prose h2 { font-size: 22px; font-weight: 700; margin: 40px 0 12px; }
.prose p, .prose li { color: var(--ink-2); }
.prose p + p { margin-top: 12px; }
.prose ul { list-style: disc; padding-left: 22px; margin-top: 10px; }
.prose li + li { margin-top: 6px; }
.prose .updated { font: 500 13px/1 var(--f-mono); color: var(--ink-3); margin-bottom: 32px; }
.prose .todo { background: color-mix(in srgb, var(--signal) 14%, transparent); padding: 0 4px; border-radius: 4px; }
.notfound { min-height: 60vh; display: grid; align-content: center; }
.notfound .code { font: 500 14px/1 var(--f-mono); color: var(--signal-ink); margin-bottom: 18px; letter-spacing: .1em; }
.notfound h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 800; margin-bottom: 18px; }
.notfound p { color: var(--ink-2); margin-bottom: 30px; max-width: 48ch; }