:root {
  --paper: #F3F5F6;
  --surface: #FFFFFF;
  --ink: #16232B;
  --ink-soft: #4A5C66;
  --ink-faint: #7C8D95;
  --line: #D7DEE2;
  --line-strong: #B7C3C8;
  --navy: #1B3A4B;
  --navy-soft: #2C5068;
  --redline: #C0392B;
  --redline-soft: #E8D3D0;
  --ok: #1E8A5F;
  --radius: 3px;
  --mono: Consolas, 'Cascadia Code', 'SFMono-Regular', ui-monospace, Menlo, monospace;
  --sans: 'Segoe UI', system-ui, -apple-system, Roboto, Arial, sans-serif;
  --display: Bahnschrift, 'DIN Alternate', 'Arial Narrow', var(--sans);
}
:root[data-theme="dark"] {
  --paper: #10171B; --surface: #17222A; --ink: #E7EDEF; --ink-soft: #9FB0B8; --ink-faint: #6C7E86;
  --line: #2A3941; --line-strong: #3A4B54; --navy: #7FB4D4; --navy-soft: #5C93B4;
  --redline: #E2695B; --redline-soft: #3A2523; --ok: #4CC38A;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #10171B; --surface: #17222A; --ink: #E7EDEF; --ink-soft: #9FB0B8; --ink-faint: #6C7E86;
    --line: #2A3941; --line-strong: #3A4B54; --navy: #7FB4D4; --navy-soft: #5C93B4;
    --redline: #E2695B; --redline-soft: #3A2523; --ok: #4CC38A;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.6; -webkit-font-smoothing: antialiased; }
h1, h2, h3 { font-family: var(--display); text-wrap: balance; letter-spacing: 0.2px; }
.container { max-width: 1040px; margin: 0 auto; padding: 0 28px; }
.mono { font-family: var(--mono); }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--redline); outline-offset: 2px; }

.titlestrip { background: var(--navy); color: #EAF2F6; }
.titlestrip .container { display: flex; justify-content: space-between; align-items: center; height: 30px; font-size: 0.72em; letter-spacing: 0.4px; }
.titlestrip .mono { opacity: 0.8; }

.navbar { position: sticky; top: 0; z-index: 50; background: #2C3E50; border-bottom: 1px solid var(--line); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { text-decoration: none; color: var(--ink); display: flex; flex-direction: column; line-height: 1.1; }
.brand .word { font-family: var(--display); font-weight: 700; font-size: 1.5em; letter-spacing: 0.5px; }
.brand .word .bar { color: var(--redline); }
.brand-logo { height: 56px; width: auto; display: block; }
.navbar .lang-switch { border-color: rgba(255,255,255,0.2); }
.navbar .lang-switch a { color: #BDC3C7; border-left-color: rgba(255,255,255,0.2); }
.navbar .lang-switch a.active { background: #3498DB; color: #fff; }
.navbar .social-links a { color: #BDC3C7; }
.navbar .social-links a:hover { color: #3498DB; }
.brand .sub { font-family: var(--mono); font-size: 0.62em; color: var(--ink-faint); letter-spacing: 1px; text-transform: uppercase; }

.lang-switch { display: flex; gap: 2px; border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; }
.lang-switch a { text-decoration: none; font-family: var(--mono); font-size: 0.78em; font-weight: 600; padding: 7px 11px; color: var(--ink-soft); border-left: 1px solid var(--line-strong); }
.lang-switch a:first-child { border-left: none; }
.lang-switch a.active { background: var(--navy); color: #fff; }

.hero { padding: 76px 0 88px; border-bottom: 1px solid var(--line); }
.hero .container { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.eyebrow { font-family: var(--mono); font-size: 0.78em; color: var(--redline); letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--redline); display: inline-block; }
.hero h1 { font-size: clamp(2.1em, 4vw, 2.85em); margin: 0 0 20px; font-weight: 700; color: var(--ink); }
.hero p.lede { font-size: 1.14em; color: var(--ink-soft); max-width: 46ch; margin: 0 0 30px; }

.btn { display: inline-flex; align-items: center; gap: 10px; padding: 13px 24px; border-radius: var(--radius); font-family: var(--mono); font-size: 0.92em; font-weight: 700; letter-spacing: 0.3px; text-decoration: none; border: 1px solid transparent; cursor: pointer; background: none; }
.btn-primary { background: var(--redline); color: #fff; }
.btn-primary:hover { filter: brightness(0.9); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink-soft); }
.btn-ghost:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

.meta-row { display: flex; gap: 22px; margin-top: 34px; flex-wrap: wrap; }
.meta-row .item { font-size: 0.85em; color: var(--ink-faint); display: flex; align-items: center; gap: 7px; }
.meta-row .dot { width: 6px; height: 6px; background: var(--navy-soft); border-radius: 50%; display: inline-block; }

.diagram { position: relative; display: flex; align-items: center; justify-content: center; }
.diagram svg { width: 100%; height: auto; max-width: 340px; }
.diagram .cap { position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%); font-family: var(--mono); font-size: 0.68em; color: var(--ink-faint); letter-spacing: 0.6px; white-space: nowrap; }

section.block { padding: 84px 0; }
section.block.surface { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.head { max-width: 56ch; margin-bottom: 46px; }
.head h2 { font-size: 1.9em; margin: 0 0 12px; color: var(--ink); }
.head p { color: var(--ink-soft); margin: 0; }

.spec-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 40px; }
.spec-item { padding: 22px 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: 40px 1fr; gap: 16px; }
.spec-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
.spec-tag { font-family: var(--mono); font-size: 0.72em; color: var(--navy-soft); border: 1px solid var(--line-strong); border-radius: var(--radius); height: 26px; display: flex; align-items: center; justify-content: center; }
.spec-item h3 { margin: 0 0 6px; font-size: 1.05em; font-family: var(--sans); font-weight: 700; }
.spec-item p { margin: 0; color: var(--ink-soft); font-size: 0.95em; }

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.flow::before { content: ""; position: absolute; top: 16px; left: 5%; right: 5%; height: 0; border-top: 1px dashed var(--line-strong); }
.flow-step { position: relative; padding-right: 18px; }
.flow-step .num { font-family: var(--mono); font-weight: 700; font-size: 0.82em; background: var(--paper); color: var(--navy); border: 1px solid var(--line-strong); width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius); margin-bottom: 16px; position: relative; z-index: 1; }
.flow-step h3 { margin: 0 0 6px; font-size: 1em; font-family: var(--sans); font-weight: 700; }
.flow-step p { margin: 0; color: var(--ink-soft); font-size: 0.92em; }

.trial-line { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 0.88em; color: var(--navy-soft); border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: 11px 16px; margin-bottom: 40px; width: fit-content; }
.trial-line strong { color: var(--ink); }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.plan { padding: 30px 26px; border-left: 1px solid var(--line); background: var(--paper); }
.plan:first-child { border-left: none; }
.plan.rec { background: var(--surface); }
.plan .rec-tag { font-family: var(--mono); font-size: 0.68em; color: var(--redline); letter-spacing: 0.6px; text-transform: uppercase; margin-bottom: 10px; display: block; }
.plan h3 { margin: 0; font-family: var(--mono); font-size: 0.82em; text-transform: uppercase; letter-spacing: 0.8px; color: var(--ink-faint); font-weight: 700; }
.plan .price { font-family: var(--display); font-size: 2.1em; font-weight: 700; margin: 10px 0 4px; color: var(--ink); font-variant-numeric: tabular-nums; }
.plan .price span { font-family: var(--mono); font-size: 0.4em; color: var(--ink-faint); font-weight: 600; }
.plan .desc { font-size: 0.88em; color: var(--ink-soft); margin: 0 0 18px; }
.plan .btn { width: 100%; justify-content: center; }

/* Purchase panel */
.purchase-panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 34px; margin-top: 40px; display: none; }
.purchase-panel.open { display: block; }
.purchase-panel h3 { margin: 0 0 4px; font-size: 1.2em; }
.purchase-panel .plan-label { font-family: var(--mono); font-size: 0.85em; color: var(--navy-soft); margin-bottom: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 8px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 0.82em; font-weight: 700; color: var(--ink-soft); }
.form-field input, .form-field textarea { font-family: var(--sans); font-size: 0.95em; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--paper); color: var(--ink); resize: vertical; }
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--navy-soft); }
.form-help { font-size: 0.8em; color: var(--ink-faint); margin: -4px 0 0; }
.paypal-slot { margin-top: 22px; max-width: 320px; }
.purchase-msg { margin-top: 16px; font-size: 0.9em; padding: 12px 14px; border-radius: var(--radius); display: none; }
.purchase-msg.show { display: block; }
.purchase-msg.ok { background: color-mix(in srgb, var(--ok) 12%, transparent); color: var(--ok); border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent); }
.purchase-msg.err { background: var(--redline-soft); color: var(--redline); border: 1px solid var(--redline); }

/* Video placeholder sotto "Come funziona" */
.video-block { margin-top: 60px; }
.video-block h3 { font-size: 1.3em; margin: 0 0 18px; }
.video-placeholder {
  aspect-ratio: 16 / 9; max-width: 640px;
  border: 1px dashed var(--line-strong); border-radius: var(--radius);
  background: var(--paper);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  color: var(--ink-faint);
}
.video-frame { aspect-ratio: 16 / 9; max-width: 640px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.video-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.video-placeholder .play-icon {
  width: 52px; height: 52px; border-radius: 50%; border: 1px solid var(--line-strong);
  display: flex; align-items: center; justify-content: center; font-size: 1.1em; color: var(--navy-soft);
}

/* Modale contatti */
.modal-backdrop {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(16, 23, 27, 0.55);
  align-items: center; justify-content: center; padding: 20px;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px; max-width: 460px; width: 100%; position: relative;
}
.modal h3 { margin: 0 0 20px; font-size: 1.25em; }
.modal-close {
  position: absolute; top: 16px; right: 16px; background: none; border: none;
  font-size: 1em; color: var(--ink-faint); cursor: pointer; padding: 4px;
}
.modal-close:hover { color: var(--ink); }

.contact { border: 1px solid var(--line); border-radius: var(--radius); padding: 46px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; background: var(--surface); }
.contact h2 { margin: 0 0 8px; font-size: 1.5em; }
.contact p { margin: 0; color: var(--ink-soft); }
.contact .info { margin-top: 14px; font-family: var(--mono); font-size: 0.85em; color: var(--ink-faint); display: flex; flex-direction: column; gap: 4px; }

/* Slider referenze */
.logo-slider {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}
.logo-track {
  display: flex; align-items: center; gap: 64px; width: max-content;
  animation: logo-scroll 28s linear infinite;
}
.logo-slider:hover .logo-track { animation-play-state: paused; }
.logo-track img {
  height: 56px; width: auto; max-width: 200px; object-fit: contain;
  filter: grayscale(1) opacity(0.55);
  transition: filter 0.2s ease;
}
.logo-track a:hover img, .logo-track img:hover { filter: grayscale(0) opacity(1); }
.logo-track a { display: flex; align-items: center; }
@keyframes logo-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .logo-track { animation: none; overflow-x: auto; }
}

.problem-slider {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  mask-image: linear-gradient(90deg, transparent, black 5%, black 95%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 5%, black 95%, transparent);
}
.problem-track {
  display: flex; align-items: center; gap: 28px; width: max-content;
  padding: 28px 0;
  animation: problem-scroll 90s linear infinite;
}
.problem-slider:hover .problem-track { animation-play-state: paused; }
.problem-track img {
  height: 300px; width: auto; border: 1px solid var(--line-strong); border-radius: 4px;
}
@keyframes problem-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .problem-track { animation: none; overflow-x: auto; }
}
@media (max-width: 820px) {
  .problem-track img { height: 200px; }
}

footer { padding: 30px 0; }
footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
footer .mono { font-size: 0.76em; color: var(--ink-faint); }
.social-links { display: flex; gap: 14px; }
.social-links a { color: var(--ink-soft); display: flex; align-items: center; }
.social-links a:hover { color: var(--redline); }
.navbar-right { display: flex; align-items: center; gap: 18px; }

@media (max-width: 820px) {
  .navbar .container { flex-wrap: wrap; height: auto; min-height: 72px; padding: 10px 0; row-gap: 8px; }
  .brand-logo { height: 34px; }
  .navbar-right { gap: 10px; flex-wrap: wrap; }
  .hero .container { grid-template-columns: 1fr; }
  .diagram { order: -1; max-width: 220px; margin: 0 auto 12px; }
  .spec-list { grid-template-columns: 1fr; }
  .spec-item:nth-last-child(-n+2) { border-bottom: none; }
  .spec-item:last-child { border-bottom: 1px solid var(--line); }
  .flow { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .flow::before { display: none; }
  .plans { grid-template-columns: 1fr; }
  .plan { border-left: none; border-top: 1px solid var(--line); }
  .plan:first-child { border-top: none; }
  .contact { grid-template-columns: 1fr; text-align: left; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Admin panel (shares tokens, simpler chrome) */
.admin-wrap { max-width: 760px; margin: 60px auto; padding: 0 24px; }
.admin-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 32px; margin-bottom: 28px; }
.admin-card h2 { margin: 0 0 20px; font-size: 1.25em; }
table.admin-table { width: 100%; border-collapse: collapse; font-size: 0.88em; }
table.admin-table th, table.admin-table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); }
table.admin-table th { font-family: var(--mono); font-size: 0.78em; text-transform: uppercase; color: var(--ink-faint); letter-spacing: 0.5px; }
.status-pill { font-family: var(--mono); font-size: 0.75em; padding: 2px 8px; border-radius: 10px; }
.status-pill.fulfilled { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.status-pill.created { background: var(--line); color: var(--ink-soft); }
.status-pill.failed { background: var(--redline-soft); color: var(--redline); }