/* ==========================================================================
   HackerSchool — design system
   Nero + verde neon. Tipografia: sans di sistema + monospace per i dettagli.
   ========================================================================== */

:root {
  --bg:          #04070a;
  --bg-soft:     #080d13;
  --panel:       #0b121a;
  --panel-2:     #0e1721;
  --line:        #17232f;
  --line-soft:   #111a24;

  --fg:          #e8f1ee;
  --fg-dim:      #9bb0ab;
  --fg-mute:     #647a76;

  --neon:        #39ff9b;
  --neon-soft:   #2ee08a;
  --neon-deep:   #0f7a4c;
  --neon-glow:   rgba(57, 255, 155, .28);

  --danger:      #ff5d5d;
  --warn:        #ffd166;

  --radius:      18px;
  --radius-lg:   26px;
  --radius-sm:   10px;

  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --max: 1180px;
  --shadow:  0 24px 70px rgba(0, 0, 0, .55);
  --ring:    0 0 0 1px var(--line);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* griglia + alone verde di fondo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .35;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
}

body::after {
  content: "";
  position: fixed;
  top: -30vh; left: 50%;
  width: 120vw; height: 80vh;
  transform: translateX(-50%);
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(57, 255, 155, .10), transparent 62%);
}

img, svg { max-width: 100%; display: block; }
a { color: var(--neon); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--neon); color: #04120b; }

/* ------------------------------------------------------------ tipografia -- */
h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0 0 .5em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.3rem, 6vw, 4.1rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.35rem); letter-spacing: -0.02em; }
p  { margin: 0 0 1rem; color: var(--fg-dim); text-wrap: pretty; }

.lead { font-size: clamp(1.02rem, 1.6vw, 1.2rem); color: var(--fg-dim); max-width: 62ch; }

.mono {
  font-family: var(--mono);
  font-size: .85em;
  letter-spacing: .02em;
}

.neon-text {
  color: var(--neon);
  text-shadow: 0 0 28px var(--neon-glow);
}

/* --------------------------------------------------------------- layout -- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section-head { max-width: 62ch; margin-bottom: clamp(2rem, 4vw, 3rem); }

.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--mono);
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: var(--neon-soft);
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--neon-soft);
  opacity: .7;
}

/* --------------------------------------------------------------- navbar -- */
.skip {
  position: absolute; left: -9999px;
  background: var(--neon); color: #04120b;
  padding: .7rem 1rem; border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 700; z-index: 100;
}
.skip:focus { left: 0; top: 0; }

.nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(4, 7, 10, .78);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  display: flex; align-items: center; gap: 1.5rem;
  min-height: 68px;
}

.brand {
  display: inline-flex; align-items: center; gap: .6rem;
  font-weight: 800; letter-spacing: -.02em; font-size: 1.06rem;
  color: var(--fg); text-decoration: none; white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: linear-gradient(150deg, var(--neon), var(--neon-deep));
  color: #04120b;
  font-family: var(--mono); font-weight: 700; font-size: .95rem;
  box-shadow: 0 0 22px var(--neon-glow);
}
.brand span.dot { color: var(--neon); }

.nav-links {
  display: flex; align-items: center; gap: 1.4rem;
  margin-left: auto;
  list-style: none; padding: 0; margin-block: 0;
}
.nav-links a {
  color: var(--fg-dim);
  font-size: .93rem; font-weight: 500;
  text-decoration: none;
  padding-block: .35rem;
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--fg);
  border-bottom-color: var(--neon);
  text-decoration: none;
}

.nav-cta { margin-left: .5rem; }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--fg);
  padding: .45rem .6rem;
  cursor: pointer;
}

/* --------------------------------------------------------------- bottoni -- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .55rem;
  padding: .82rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit; font-weight: 650; font-size: .95rem;
  letter-spacing: -.01em;
  cursor: pointer;
  text-decoration: none;
  transition: transform .12s ease, box-shadow .18s ease, background .18s ease, border-color .18s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--neon);
  color: #04120b;
  box-shadow: 0 10px 34px -8px var(--neon-glow);
}
.btn-primary:hover { background: #57ffae; box-shadow: 0 14px 40px -6px var(--neon-glow); }

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--neon-deep); background: rgba(57,255,155,.06); }

.btn-sm { padding: .55rem 1rem; font-size: .87rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; }

/* ----------------------------------------------------------------- hero -- */
.hero { padding-top: clamp(3rem, 7vw, 5.5rem); padding-bottom: clamp(3rem, 6vw, 5rem); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.pill {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .38rem .8rem .38rem .55rem;
  border-radius: 999px;
  background: rgba(57, 255, 155, .07);
  border: 1px solid rgba(57, 255, 155, .22);
  font-family: var(--mono); font-size: .74rem;
  color: var(--neon);
  letter-spacing: .04em;
  margin-bottom: 1.3rem;
}
.pill .pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 0 var(--neon-glow);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(57,255,155,.5); }
  70%  { box-shadow: 0 0 0 9px rgba(57,255,155,0); }
  100% { box-shadow: 0 0 0 0 rgba(57,255,155,0); }
}

.hero h1 em {
  font-style: normal;
  color: var(--neon);
  text-shadow: 0 0 40px var(--neon-glow);
}

.hero-cta { margin-top: 1.9rem; }

.hero-note {
  margin-top: 1.1rem;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--fg-mute);
}

/* terminal */
.terminal {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, #0a1218, #060a0e);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.terminal-bar {
  display: flex; align-items: center; gap: .45rem;
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255,255,255,.02);
}
.terminal-bar .dot { width: 10px; height: 10px; border-radius: 50%; background: #24333f; }
.terminal-bar .dot:nth-child(1) { background: #ff5f57; }
.terminal-bar .dot:nth-child(2) { background: #febc2e; }
.terminal-bar .dot:nth-child(3) { background: #28c840; }
.terminal-bar .title {
  margin-left: auto;
  font-family: var(--mono); font-size: .72rem; color: var(--fg-mute);
}
.terminal-body {
  padding: 1.1rem 1.15rem 1.35rem;
  font-family: var(--mono);
  font-size: .84rem;
  line-height: 1.85;
  min-height: 268px;
  color: #cfe6dd;
  white-space: pre-wrap;
  word-break: break-word;
}
.terminal-body .prompt { color: var(--neon); }
.terminal-body .out    { color: var(--fg-dim); }
.terminal-body .ok     { color: var(--neon); }
.terminal-body .cursor {
  display: inline-block;
  width: 8px; height: 1em;
  background: var(--neon);
  vertical-align: -2px;
  animation: blink 1.05s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------------------------------------------------------------- stats -- */
.stats {
  border-block: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(57,255,155,.035), transparent);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  padding-block: clamp(1.8rem, 4vw, 2.6rem);
  text-align: center;
}
.stat-num {
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -.035em;
  color: var(--fg);
  line-height: 1.1;
}
.stat-num span { color: var(--neon); }
.stat-label {
  font-family: var(--mono);
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--fg-mute);
  margin-top: .35rem;
}

/* ---------------------------------------------------------------- card -- */
.card {
  position: relative;
  padding: 1.6rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(175deg, var(--panel), var(--bg-soft));
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover {
  border-color: var(--neon-deep);
  transform: translateY(-3px);
  box-shadow: 0 18px 48px -20px var(--neon-glow);
}
.card h3 { margin-bottom: .45rem; }
.card p:last-child { margin-bottom: 0; }

.card-icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 12px;
  margin-bottom: 1rem;
  background: rgba(57,255,155,.09);
  border: 1px solid rgba(57,255,155,.24);
  color: var(--neon);
}
.card-icon svg { width: 21px; height: 21px; }

/* --------------------------------------------------------------- corsi -- */
.track {
  display: flex; flex-direction: column;
  padding: 1.7rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(175deg, var(--panel), var(--bg-soft));
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.track:hover { transform: translateY(-4px); border-color: var(--neon-deep); box-shadow: 0 22px 60px -26px var(--neon-glow); }
.track.featured {
  border-color: rgba(57,255,155,.4);
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(57,255,155,.10), transparent 60%),
    linear-gradient(175deg, var(--panel), var(--bg-soft));
}
.track-top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.badge {
  font-family: var(--mono); font-size: .7rem;
  text-transform: uppercase; letter-spacing: .1em;
  padding: .28rem .6rem; border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--fg-mute);
}
.badge.neon { color: var(--neon); border-color: rgba(57,255,155,.35); background: rgba(57,255,155,.08); }
.badge.warn { color: var(--warn); border-color: rgba(255,209,102,.3); background: rgba(255,209,102,.07); }

.track h3 { font-size: 1.3rem; }
.track .price {
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--fg-mute);
  margin-bottom: 1.1rem;
}
.track .price strong { color: var(--fg); font-size: 1.05rem; }

.track ul {
  list-style: none; padding: 0; margin: 0 0 1.4rem;
  display: grid; gap: .55rem;
  font-size: .92rem; color: var(--fg-dim);
}
.track li { display: flex; gap: .6rem; align-items: flex-start; }
.track li::before {
  content: "▹";
  color: var(--neon);
  font-family: var(--mono);
  line-height: 1.5;
}
.track .btn { margin-top: auto; }

/* ------------------------------------------------------------- timeline -- */
.timeline { position: relative; display: grid; gap: 1rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 19px; top: 12px; bottom: 12px;
  width: 1px;
  background: linear-gradient(var(--neon-deep), transparent 92%);
}
.step { position: relative; padding-left: 3.4rem; }
.step::before {
  content: counter(step, decimal-leading-zero);
  counter-increment: step;
  position: absolute; left: 0; top: 0;
  width: 39px; height: 39px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--neon-deep);
  color: var(--neon);
  font-family: var(--mono); font-size: .76rem;
}
.timeline { counter-reset: step; }
.step h3 { margin-bottom: .3rem; font-size: 1.08rem; }
.step p { margin-bottom: 0; font-size: .94rem; }

/* ---------------------------------------------------------- blockquote -- */
.quote {
  padding: 1.6rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(175deg, var(--panel), var(--bg-soft));
  display: flex; flex-direction: column; gap: 1rem;
}
.quote p { font-size: .98rem; color: var(--fg); margin: 0; }
.quote footer {
  display: flex; align-items: center; gap: .7rem;
  font-size: .85rem; color: var(--fg-mute);
}
.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(57,255,155,.12);
  border: 1px solid rgba(57,255,155,.25);
  color: var(--neon);
  font-family: var(--mono); font-size: .8rem; font-weight: 700;
}
.quote footer strong { color: var(--fg); font-weight: 600; }

/* ------------------------------------------------------------------ faq -- */
.faq { display: grid; gap: .7rem; }
details {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  padding: 0 1.1rem;
  transition: border-color .2s, background .2s;
}
details[open] { border-color: var(--neon-deep); background: var(--panel); }
details summary {
  cursor: pointer;
  list-style: none;
  padding: 1.05rem 0;
  font-weight: 600;
  font-size: .98rem;
  display: flex; align-items: center; gap: 1rem;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  color: var(--neon);
  font-size: 1.1rem;
  transition: transform .2s;
}
details[open] summary::after { content: "−"; }
details .answer { padding-bottom: 1.1rem; }
details .answer p { margin: 0; font-size: .94rem; }

/* ------------------------------------------------------------------ cta -- */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(57,255,155,.28);
  background:
    radial-gradient(90% 120% at 50% 0%, rgba(57,255,155,.14), transparent 62%),
    linear-gradient(175deg, #0a1219, #05080b);
  padding: clamp(2rem, 5vw, 3.6rem);
  text-align: center;
  overflow: hidden;
}
.cta-band h2 { margin-bottom: .6rem; }
.cta-band p { max-width: 56ch; margin-inline: auto; }
.cta-band .btn-row { justify-content: center; margin-top: 1.8rem; }

/* ---------------------------------------------------------------- table -- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .92rem; min-width: 620px; }
th, td { padding: .85rem 1.1rem; text-align: left; border-bottom: 1px solid var(--line-soft); }
th {
  font-family: var(--mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--fg-mute); background: rgba(255,255,255,.02);
  font-weight: 600;
}
tbody tr:last-child td { border-bottom: 0; }
td { color: var(--fg-dim); }
td strong { color: var(--fg); }
.yes { color: var(--neon); font-family: var(--mono); }
.no  { color: var(--fg-mute); font-family: var(--mono); }

/* ----------------------------------------------------------------- footer -- */
.footer {
  border-top: 1px solid var(--line-soft);
  padding-block: 3rem 2rem;
  margin-top: 2rem;
  background: linear-gradient(180deg, transparent, rgba(57,255,155,.02));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(130px, 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer h4 {
  font-family: var(--mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .12em;
  color: var(--fg-mute); margin-bottom: .9rem; font-weight: 600;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; }
.footer ul a { color: var(--fg-dim); font-size: .9rem; }
.footer ul a:hover { color: var(--neon); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 1rem;
  align-items: center; justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
  font-size: .82rem; color: var(--fg-mute);
}
.footer-bottom .mono { color: var(--fg-mute); }

/* --------------------------------------------------------------- pagina -- */
.page-head {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: 1rem;
}
.page-head h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); }

.breadcrumb {
  font-family: var(--mono); font-size: .74rem;
  color: var(--fg-mute); margin-bottom: 1.2rem;
  letter-spacing: .04em;
}
.breadcrumb a { color: var(--fg-mute); }
.breadcrumb a:hover { color: var(--neon); }

.form { display: grid; gap: 1rem; max-width: 520px; }
.field { display: grid; gap: .4rem; }
.field label {
  font-family: var(--mono); font-size: .74rem;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--fg-mute);
}
.field input, .field select, .field textarea {
  font: inherit; font-size: .95rem;
  color: var(--fg);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .75rem .9rem;
  transition: border-color .15s, background .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--neon-deep);
  background: var(--panel);
  outline: none;
}
.field textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: .8rem; color: var(--fg-mute); margin: 0; }
.form-status {
  font-family: var(--mono); font-size: .82rem;
  padding: .8rem 1rem; border-radius: var(--radius-sm);
  border: 1px solid var(--neon-deep);
  background: rgba(57,255,155,.08);
  color: var(--neon);
}
.form-status[hidden] { display: none; }

/* -------------------------------------------------------------- animazioni -- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .6s ease, transform .6s cubic-bezier(.22,.7,.3,1);
  }
  .reveal.in { opacity: 1; transform: none; }
}

/* ------------------------------------------------------------- responsive -- */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; }
  .terminal { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .5rem 1rem 1rem;
    background: rgba(6, 10, 14, .98);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links li { border-bottom: 1px solid var(--line-soft); }
  .nav-links li:last-child { border-bottom: 0; }
  .nav-links a { display: block; padding: .8rem 0; font-size: 1rem; }
  .nav-cta { margin: .8rem 0 0; }
  .nav-cta .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.6rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}