/* ==========================================================================
   Tryphon — global.css
   Design system: Linear.app dark canvas (DESIGN-linear_app.md)
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  /* Surfaces */
  --canvas: #010102;
  --surface-1: #0f1011;
  --surface-2: #141516;
  --surface-3: #18191a;
  --surface-4: #191a1b;
  --hairline: #23252a;
  --hairline-strong: #34343a;
  --hairline-tertiary: #3e3e44;
  /* Ink */
  --ink: #f7f8f8;
  --ink-muted: #d0d6e0;
  --ink-subtle: #8a8f98;
  --ink-tertiary: #62666d;
  /* Accent — scarce: brand mark, primary CTA, focus ring, link emphasis ONLY */
  --primary: #5e6ad2;
  --primary-hover: #828fff;
  --primary-focus: #5e69d1;
  --on-primary: #ffffff;
  --success: #27a644;
  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
  /* Spacing (4px base) */
  --s-xxs: 4px;
  --s-xs: 8px;
  --s-sm: 12px;
  --s-md: 16px;
  --s-lg: 24px;
  --s-xl: 32px;
  --s-xxl: 48px;
  --s-section: 96px;
  /* Type */
  --font-stack: Inter, 'SF Pro Display', -apple-system, system-ui, 'Segoe UI', Roboto, sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink-muted);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.05px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; }
h1, h2, h3, h4 { color: var(--ink); margin: 0 0 var(--s-md); }
p { margin: 0 0 var(--s-md); }
ul, ol { margin: 0 0 var(--s-md); padding-left: 1.4em; }
li { margin-bottom: var(--s-xs); }

/* ---------- Typography scale ---------- */
h1, .display-xl {
  font-size: 80px; font-weight: 600; line-height: 1.05; letter-spacing: -3px;
}
h2, .display-lg {
  font-size: 56px; font-weight: 600; line-height: 1.1; letter-spacing: -1.8px;
}
.display-md, h3.large {
  font-size: 40px; font-weight: 600; line-height: 1.15; letter-spacing: -1px;
}
h3 { font-size: 28px; font-weight: 600; line-height: 1.2; letter-spacing: -0.6px; }
h4, .card-title { font-size: 22px; font-weight: 500; line-height: 1.25; letter-spacing: -0.4px; }
.body-lg { font-size: 18px; line-height: 1.5; letter-spacing: -0.1px; }
.body-sm { font-size: 14px; }
.caption { font-size: 12px; line-height: 1.4; color: var(--ink-subtle); }
.eyebrow {
  display: block;
  font-size: 13px; font-weight: 500; line-height: 1.3; letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--primary-hover);
  margin-bottom: var(--s-sm);
}

/* ---------- Links ---------- */
a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--hairline-tertiary); text-underline-offset: 3px; transition: color .15s ease; }
a:hover { color: var(--primary-hover); }
a:focus-visible { outline: 2px solid var(--primary-focus); outline-offset: 2px; border-radius: var(--r-xs); }
main a { color: var(--ink-muted); }
main a:hover { color: var(--primary-hover); }

/* ---------- Layout ---------- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--s-lg); }
.reading { max-width: 800px; margin: 0 auto; padding: 0 var(--s-lg); }
section { padding: var(--s-section) 0 0; }
main > section:last-of-type { padding-bottom: var(--s-section); }

/* ---------- Icons ---------- */
.icon {
  width: 20px; height: 20px;
  vertical-align: -0.2em;
  color: inherit;
  flex-shrink: 0;
}
.icon-sm { width: 16px; height: 16px; }
.icon-ok { color: var(--success); }
.icon-no { color: var(--ink-tertiary); }

/* ---------- Buttons ---------- */
.button-primary, .button-secondary {
  display: inline-flex; align-items: center; gap: var(--s-xs);
  font-size: 14px; font-weight: 500; line-height: 1.2;
  padding: 10px 16px;
  min-height: 40px;
  border-radius: var(--r-md);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.button-primary { background: var(--primary); color: var(--on-primary) !important; }
.button-primary:hover { background: var(--primary-hover); color: var(--on-primary) !important; }
.button-primary:active { background: var(--primary-focus); }
.button-secondary { background: var(--surface-1); color: var(--ink) !important; border-color: var(--hairline); }
.button-secondary:hover { background: var(--surface-2); border-color: var(--hairline-strong); color: var(--ink) !important; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
}
.nav-bar {
  display: flex; align-items: center; gap: var(--s-lg);
  height: 56px;
  max-width: 1280px; margin: 0 auto; padding: 0 var(--s-lg);
}
.brand {
  display: inline-flex; align-items: center; gap: var(--s-xs);
  font-weight: 600; font-size: 18px; letter-spacing: -0.4px;
  color: var(--ink); text-decoration: none;
}
.brand .icon { color: var(--primary); width: 22px; height: 22px; }
.brand:hover { color: var(--ink); }
.nav-toggle { position: absolute; opacity: 0; }
.nav-toggle-label {
  display: none;
  margin-left: auto;
  color: var(--ink);
  cursor: pointer;
  padding: var(--s-xs);
  border-radius: var(--r-md);
}
.nav-menu {
  display: flex; align-items: center; gap: var(--s-md);
  margin-left: auto;
  list-style: none; padding: 0; margin-top: 0; margin-bottom: 0;
}
.nav-menu li { margin: 0; }
.nav-menu a:not(.button-primary) {
  font-size: 14px; color: var(--ink-muted); text-decoration: none;
  padding: var(--s-xs) var(--s-sm); border-radius: var(--r-md);
}
.nav-menu a:not(.button-primary):hover { color: var(--ink); background: var(--surface-1); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { padding: var(--s-md) 0 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: var(--s-xs); padding: 0; margin: 0; font-size: 12px; color: var(--ink-subtle); }
.breadcrumbs li + li::before { content: "/"; margin-right: var(--s-xs); color: var(--ink-tertiary); }
.breadcrumbs a { color: var(--ink-subtle); text-decoration: none; }
.breadcrumbs a:hover { color: var(--primary-hover); }

/* ---------- Badges ---------- */
.status-badge {
  display: inline-flex; align-items: center; gap: var(--s-xxs);
  background: var(--surface-2); color: var(--ink-muted);
  font-size: 12px; line-height: 1.4;
  padding: 3px 10px; border-radius: var(--r-pill);
  border: 1px solid var(--hairline);
  white-space: nowrap;
}
.status-badge .icon { width: 14px; height: 14px; }
.badge-row { display: flex; flex-wrap: wrap; gap: var(--s-xs); margin: var(--s-md) 0; }

/* ---------- Cards ---------- */
.feature-card, .pricing-card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-top-color: var(--hairline-strong); /* subtle lighter top edge */
  border-radius: var(--r-lg);
  padding: var(--s-lg);
}
.pricing-card.featured { background: var(--surface-2); border-color: var(--hairline-strong); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-md); }
.card-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-md); }
.feature-card h3, .feature-card h4 { margin-top: 0; }
.feature-card p:last-child { margin-bottom: 0; }

.testimonial-card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-top-color: var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: var(--s-xl);
  font-size: 18px; letter-spacing: -0.1px;
}

/* ---------- Screenshot / image placeholder panels ---------- */
.product-screenshot-card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-top-color: var(--hairline-strong);
  border-radius: var(--r-xl);
  padding: var(--s-lg);
  margin: var(--s-lg) 0;
}
.product-screenshot-card .frame {
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2);
  border: 1px dashed var(--hairline-strong);
  border-radius: var(--r-md);
  min-height: 220px;
  color: var(--ink-tertiary);
  font-size: 14px;
}
.product-screenshot-card figcaption { margin-top: var(--s-sm); font-size: 12px; color: var(--ink-subtle); }
figure { margin: 0; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--hairline); border-radius: var(--r-lg); margin: var(--s-lg) 0; }
table { border-collapse: collapse; width: 100%; min-width: 720px; font-size: 14px; }
caption { text-align: left; padding: var(--s-md); color: var(--ink-subtle); font-size: 12px; }
th, td { padding: var(--s-sm) var(--s-md); text-align: left; border-bottom: 1px solid var(--hairline); vertical-align: top; }
thead th {
  position: sticky; top: 0;
  background: var(--surface-2); color: var(--ink);
  font-weight: 500; white-space: nowrap;
  z-index: 1;
}
tbody tr:nth-child(even) { background: var(--surface-1); }
tbody tr:last-child td { border-bottom: none; }
td .icon { vertical-align: -0.25em; }

/* ---------- FAQ ---------- */
.faq details {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  margin-bottom: var(--s-sm);
}
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-md);
  cursor: pointer;
  list-style: none;
  padding: var(--s-md) var(--s-lg);
  font-weight: 500; color: var(--ink);
  min-height: 44px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .icon { transition: transform .2s ease; color: var(--ink-subtle); }
.faq details[open] summary .icon { transform: rotate(180deg); }
.faq details > div { padding: 0 var(--s-lg) var(--s-md); }
.faq details > div p:last-child { margin-bottom: 0; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-top-color: var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: var(--s-xxl);
  text-align: center;
}
.cta-banner h2, .cta-banner h3 { font-size: 28px; font-weight: 600; letter-spacing: -0.6px; margin-bottom: var(--s-sm); }
.cta-banner p { max-width: 640px; margin: 0 auto var(--s-lg); color: var(--ink-muted); }

/* ---------- Callout aside ---------- */
.callout {
  background: var(--surface-2);
  border: 1px solid var(--hairline-strong);
  border-left: 3px solid var(--primary);
  border-radius: var(--r-md);
  padding: var(--s-lg);
  margin: var(--s-xl) 0;
}
.callout h3, .callout h4 { margin-top: 0; font-size: 22px; letter-spacing: -0.4px; }
.callout p:last-child { margin-bottom: 0; }

/* ---------- Pros / cons ---------- */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-md); margin: var(--s-md) 0; }
.pros-cons ul { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.pros-cons li { display: flex; gap: var(--s-xs); align-items: flex-start; margin-bottom: var(--s-xs); }
.pros-cons .icon { margin-top: 1px; }

/* ---------- Changelog / byline row ---------- */
.changelog-row {
  display: flex; align-items: center; gap: var(--s-md);
  padding: var(--s-lg) 0;
  border-top: 1px solid var(--hairline);
  font-size: 14px; color: var(--ink-subtle);
}
.changelog-row .avatar {
  width: 40px; height: 40px; border-radius: var(--r-pill);
  background: var(--surface-2); border: 1px solid var(--hairline-strong);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-subtle);
}

/* ---------- Forms (contatti) ---------- */
.text-input, textarea.text-input {
  width: 100%;
  background: var(--surface-1);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  padding: 10px 12px;
  min-height: 44px;
  font-family: inherit; font-size: 16px;
}
.text-input:focus { outline: 2px solid var(--primary-focus); outline-offset: 1px; }
label { display: block; font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: var(--s-xxs); }
.form-field { margin-bottom: var(--s-md); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px var(--s-xl);
  color: var(--ink-subtle);
  font-size: 12px;
  margin-top: var(--s-section);
}
.footer-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--s-xl); }
.footer-inner h4 { font-size: 13px; font-weight: 500; letter-spacing: 0.4px; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s-sm); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: var(--s-xs); }
.site-footer a { color: var(--ink-subtle); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }
.footer-bottom { max-width: 1280px; margin: var(--s-xl) auto 0; padding-top: var(--s-lg); border-top: 1px solid var(--hairline); display: flex; flex-wrap: wrap; gap: var(--s-md); justify-content: space-between; color: var(--ink-tertiary); }

/* ---------- Hero shared ---------- */
.hero { padding-top: var(--s-xxl); }
.hero .subhead { font-size: 18px; line-height: 1.5; letter-spacing: -0.1px; color: var(--ink-muted); max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--s-sm); margin-top: var(--s-lg); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  h1, .display-xl { font-size: 38px; letter-spacing: -1.2px; }
  h2, .display-lg { font-size: 32px; letter-spacing: -0.8px; }
  .display-md { font-size: 28px; letter-spacing: -0.6px; }
  h3 { font-size: 22px; letter-spacing: -0.4px; }
  section { padding-top: var(--s-xxl); }
  .card-grid, .card-grid-2, .pros-cons { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .cta-banner { padding: var(--s-xl) var(--s-lg); }

  /* Hamburger */
  .nav-toggle-label { display: inline-flex; }
  .nav-menu {
    display: none;
    position: absolute; top: 56px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface-1);
    border-bottom: 1px solid var(--hairline-strong);
    padding: var(--s-sm) var(--s-lg) var(--s-lg);
  }
  .nav-toggle:checked ~ .nav-menu { display: flex; }
  .nav-menu a:not(.button-primary) { display: block; padding: var(--s-sm); }
  .nav-menu .nav-cta { margin-top: var(--s-sm); }
  .nav-menu .button-primary { justify-content: center; }
}