/* ==========================================================================
   Alvea Tech — Design system (tema scuro unico)
   ========================================================================== */

:root {
  --bg: #0b0b0c;
  --bg-elevated: #0f0f11;
  --card: #17171a;
  --card-border: #2a2a2e;
  --text: #f4f4f2;
  --text-muted: #9e9ea6;
  --accent: #e0a63c;
  --accent-dark: #c08a2a;
  --accent-ink: #14100a;
  --success: #3fae7c;
  --success-bg: rgba(63, 174, 124, 0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --max-width: 1120px;
  --radius: 10px;
  --radius-sm: 6px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0 0 16px; font-weight: 700; line-height: 1.2; color: var(--text); }
h1 { font-size: clamp(32px, 5vw, 48px); letter-spacing: -0.01em; }
h2 { font-size: clamp(26px, 3.4vw, 34px); letter-spacing: -0.01em; }
h3 { font-size: 20px; }
p { margin: 0 0 16px; color: var(--text-muted); }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
address { font-style: normal; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(224, 166, 60, 0.5), 0 8px 24px -6px rgba(224, 166, 60, 0.55);
}
.btn-secondary { background: transparent; color: var(--text); border-color: var(--card-border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-block { width: 100%; justify-content: center; }
.btn-arrow { transition: transform 0.15s ease; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ---------- Header ---------- */

/* No filter/backdrop-filter/transform/will-change/contain here: any of them
   turns this element into the containing block for .main-nav's
   position: fixed mobile panel, collapsing it to content height. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--card-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-glyph { width: 30px; height: 30px; fill: var(--accent); flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-mark { font-size: 16px; font-weight: 800; letter-spacing: 0.02em; color: var(--text); }
.logo-tech { color: var(--accent); font-weight: 800; }
.logo-sub { font-size: 10.5px; color: var(--text-muted); letter-spacing: 0.04em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav ul { display: flex; gap: 28px; }
.main-nav ul a { font-size: 15px; font-weight: 500; color: var(--text-muted); transition: color 0.15s ease; }
.main-nav ul a:hover, .main-nav ul a.active { color: var(--text); }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    inset: 76px 0 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    padding: 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .main-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav ul a { display: block; padding: 14px 4px; border-bottom: 1px solid var(--card-border); font-size: 17px; }
  .nav-cta { margin-top: 20px; }
  .nav-cta .btn { width: 100%; justify-content: center; }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    background: none; border: none; cursor: pointer; padding: 0;
  }
  .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
    content: ""; display: block; position: relative;
    width: 22px; height: 2px; background: var(--text);
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .nav-toggle span::before { position: absolute; top: -7px; }
  .nav-toggle span::after { position: absolute; top: 7px; }
  .nav-toggle[aria-expanded="true"] span { background: transparent; }
  .nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }
}

/* ---------- Hero ---------- */

.hero { padding: 96px 0 72px; }
.hero-page { padding: 64px 0 48px; border-bottom: 1px solid var(--card-border); }
.hero-content { max-width: 720px; }
.hero-eyebrow { display: block; margin-bottom: 14px; font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.hero-lede { font-size: 18px; color: var(--text-muted); max-width: 640px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }

/* ---------- Sections ---------- */

.section { padding: 72px 0; border-bottom: 1px solid var(--card-border); }
.section:last-of-type { border-bottom: none; }
.section-head { max-width: 640px; margin-bottom: 40px; }
.eyebrow { display: block; margin-bottom: 10px; font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.section-head p { margin-bottom: 0; }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: 1fr 1fr; align-items: center; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-wide { gap: 48px; }
@media (max-width: 760px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ---------- Cards ---------- */

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
}
.card-icon-wrap { position: relative; width: 52px; height: 52px; margin-bottom: 20px; }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(224, 166, 60, 0.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.card-icon svg { width: 24px; height: 24px; }
.hex-ring {
  position: absolute;
  top: 50%; left: 50%;
  width: 72px; height: 72px;
  transform: translate(-50%, -50%);
  color: var(--accent);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.hex-ring path { stroke-dasharray: 168; stroke-dashoffset: 168; transition: stroke-dashoffset 0.5s ease; }
.card:hover .hex-ring { opacity: 1; }
.card:hover .hex-ring path { stroke-dashoffset: 0; }
.card h3 { margin-bottom: 10px; }
.card p { margin-bottom: 0; }

/* ---------- Fact list (chi siamo) ---------- */

.fact-list { display: grid; gap: 14px; margin-top: 28px; }
.fact-list--narrow, .step-list--narrow { max-width: 640px; }
.fact-item { display: flex; gap: 12px; align-items: flex-start; }
.fact-item svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--accent); margin-top: 2px; }
.fact-item span { color: var(--text); font-size: 15px; }

/* ---------- Chat mock ---------- */

.chat-mock {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.chat-mock--sm { max-width: 420px; }
.chat-mock-header {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--card-border);
}
.chat-mock-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; flex-shrink: 0;
}
.chat-mock-name { display: block; font-size: 14px; font-weight: 600; color: var(--text); }
.chat-mock-status { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-muted); }
.chat-mock-status .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); display: inline-block; }
.chat-mock-body { padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 82%; padding: 10px 14px; border-radius: 14px; font-size: 14px; }
.msg p { margin: 0; color: inherit; }
.msg-time { display: block; margin-top: 4px; font-size: 10.5px; opacity: 0.6; }
.msg-in { align-self: flex-start; background: var(--bg-elevated); border: 1px solid var(--card-border); color: var(--text); border-bottom-left-radius: 4px; }
.msg-out { align-self: flex-end; background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 4px; }
.chat-mock-caption { margin-top: 10px; font-size: 12.5px; color: var(--text-muted); text-align: center; }

/* ---------- Steps ---------- */

.step-list { display: grid; gap: 20px; counter-reset: step; }
.step-item { display: flex; gap: 18px; align-items: flex-start; }
.step-num {
  flex-shrink: 0;
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--accent);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
.step-item h4 { margin: 2px 0 4px; font-size: 16px; }
.step-item p { margin: 0; }

/* ---------- CTA band ---------- */

.cta-band {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { margin-bottom: 8px; }
.cta-band p { margin-bottom: 0; }

/* ---------- Form ---------- */

.contact-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .contact-layout { grid-template-columns: 1fr; } }

.form-row { margin-bottom: 18px; }
.form-row label { display: block; margin-bottom: 7px; font-size: 14px; font-weight: 600; color: var(--text); }
.form-row input, .form-row textarea {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  transition: border-color 0.15s ease;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(224, 166, 60, 0.35);
}
.form-row textarea { min-height: 130px; resize: vertical; }

.form-check { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 14px; }
.form-check input { margin-top: 3px; flex-shrink: 0; accent-color: var(--accent); }
.form-check label { font-size: 13.5px; color: var(--text-muted); }
.form-check a { color: var(--accent); text-decoration: underline; }

.form-note { font-size: 12.5px; color: var(--text-muted); margin: 14px 0 0; }
.form-feedback { margin-top: 14px; padding: 12px 14px; border-radius: var(--radius-sm); font-size: 14px; display: none; }
.form-feedback.visible { display: block; background: var(--success-bg); color: var(--success); }

.contact-info-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
}
.contact-info-block { margin-bottom: 22px; }
.contact-info-block:last-child { margin-bottom: 0; }
.contact-info-block h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 6px; }
.contact-info-block a, .contact-info-block address { font-size: 16px; color: var(--text); }
.contact-info-block a:hover { color: var(--accent); }

.copy-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.copy-btn {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { border-color: var(--success); color: var(--success); }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--card-border); padding: 56px 0 28px; background: var(--bg-elevated); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 32px; } }
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { font-size: 14.5px; max-width: 360px; }
.site-footer h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 14px; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul a, .site-footer address { font-size: 14.5px; color: var(--text-muted); }
.site-footer ul a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--card-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { text-decoration: underline; }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- Legal pages ---------- */

.legal-content { max-width: 760px; }
.legal-content h2 { margin-top: 40px; font-size: 22px; }
.legal-content h3 { margin-top: 24px; }
.legal-content p, .legal-content li { color: var(--text-muted); font-size: 15px; }
.legal-content ul { list-style: disc; padding-left: 20px; margin-bottom: 16px; }
.legal-content li { margin-bottom: 8px; }
.legal-content table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.legal-content th, .legal-content td { text-align: left; padding: 10px 12px; border: 1px solid var(--card-border); color: var(--text-muted); }
.legal-content th { color: var(--text); }