/* Denaro — site styles
   Technical but Stripe-easy: clean, generous whitespace, crisp type. */

:root {
  --bg:           #0a1628;
  --bg-soft:      #0f1d33;
  --ink:          #0a1628;
  --ink-2:        #1f2d44;
  --mid:          #5b6b85;
  --muted:        #8a98ad;
  --border:       #e6e9ef;
  --border-soft:  #f0f2f6;
  --surface:      #ffffff;
  --surface-2:    #f7f8fb;
  --accent:       #00d4a3;          /* denaro green — value, motion */
  --accent-2:     #6366f1;          /* indigo — trust, infra */
  --accent-3:     #22d3ee;          /* cyan — data flow */
  --danger:       #ef4444;
  --warn:         #f59e0b;
  --code-bg:      #0a1628;
  --code-ink:     #d4e3ff;
  --radius:       10px;
  --radius-sm:    6px;
  --shadow-1:     0 1px 2px rgba(10, 22, 40, .04), 0 1px 1px rgba(10, 22, 40, .03);
  --shadow-2:     0 8px 28px rgba(10, 22, 40, .08), 0 2px 6px rgba(10, 22, 40, .04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.6rem;
}
h1 { font-size: clamp(2.2rem, 4.4vw, 3.6rem); line-height: 1.1; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); line-height: 1.2; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1rem; color: var(--ink-2); }

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

code, kbd, .mono {
  font-family: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.88em;
}

/* ───── Layout ───── */
.container-x {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ───── Navbar ───── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.site-nav .nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo .dot {
  width: 22px; height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-3) 50%, var(--accent-2) 100%);
  box-shadow: 0 4px 14px rgba(0, 212, 163, .35);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  color: var(--ink-2);
  font-weight: 500;
  font-size: 0.94rem;
  text-decoration: none;
}
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-cta {
  background: var(--ink);
  color: #fff !important;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background .15s, transform .15s;
}
.nav-cta:hover { background: var(--ink-2); text-decoration: none; transform: translateY(-1px); }

@media (max-width: 768px) {
  .nav-links .hide-sm { display: none; }
}

/* ───── Hero ───── */
.hero {
  position: relative;
  padding: 5.5rem 0 4.5rem;
  overflow: hidden;
  background: var(--surface);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10, 22, 40, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 22, 40, .04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at top, rgba(0, 0, 0, .55), transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at top, rgba(0, 0, 0, .55), transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 820px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-2);
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(99, 102, 241, .08);
  border: 1px solid rgba(99, 102, 241, .18);
  margin-bottom: 1.25rem;
}
.hero h1 .accent {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-3) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead {
  font-size: 1.15rem;
  color: var(--mid);
  max-width: 640px;
  margin: 1rem 0 1.8rem;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s, transform .1s;
  cursor: pointer;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--ink-2); }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-outline:hover { border-color: var(--ink-2); }
.btn-ghost { background: transparent; color: var(--ink-2); }
.btn-ghost:hover { color: var(--ink); }

/* ───── Sections ───── */
.section {
  padding: 4.5rem 0;
  border-top: 1px solid var(--border-soft);
}
.section-head {
  max-width: 720px;
  margin: 0 0 2.5rem;
}
.section-head .eyebrow { margin-bottom: 0.9rem; }

/* ───── Cards / feature grid ───── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.card:hover {
  border-color: rgba(99, 102, 241, .35);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.card .icon-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(0, 212, 163, .12), rgba(99, 102, 241, .12));
  color: var(--accent-2);
  font-size: 1.05rem;
  margin-bottom: 0.9rem;
}
.card h3 { margin-bottom: 0.35rem; }
.card p { color: var(--mid); font-size: 0.95rem; margin: 0; }

/* ───── Code-style flow panel ───── */
.flow {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 12px;
  padding: 1.5rem 1.6rem;
  font-family: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  box-shadow: var(--shadow-2);
  overflow: auto;
}
.flow .c-key   { color: #7dd3fc; }
.flow .c-val   { color: #a7f3d0; }
.flow .c-str   { color: #fbbf24; }
.flow .c-cmt   { color: #64748b; }
.flow .c-fn    { color: #c4b5fd; }

/* ───── Footer ───── */
.site-footer {
  background: var(--bg);
  color: rgba(255, 255, 255, .72);
  padding: 3rem 0 2.5rem;
  margin-top: 4rem;
  font-size: 0.9rem;
}
.site-footer a { color: rgba(255, 255, 255, .82); }
.site-footer a:hover { color: #fff; }
.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.footer-fine {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, .5);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  justify-content: space-between;
}

/* ───── Flash messages ───── */
.flash {
  padding: 0.7rem 1rem;
  border-radius: 8px;
  font-size: 0.92rem;
  margin: 1rem auto;
  max-width: 1140px;
}
.flash-error   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.flash-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }