/* ==========================================================================
   ALDA Tech Solutions
   Design system: DESIGN.md (Stripe-inspired).
   Every colour, size and radius below traces to a token in that file.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand & accent */
  --primary: #533afd;
  --primary-deep: #4434d4;
  --primary-press: #2e2b8c;
  --primary-soft: #665efd;
  --primary-subdued: #b9b9f9;
  --brand-dark-900: #1c1e54;
  --ruby: #ea2261;
  --magenta: #f96bee;

  /* Surface */
  --canvas: #ffffff;
  --canvas-soft: #f6f9fc;
  --canvas-cream: #f5e9d4;
  --hairline: #e3e8ee;
  --hairline-input: #a8c3de;

  /* Text */
  --ink: #0d253d;
  --ink-secondary: #273951;
  --ink-mute: #64748d;
  --ink-mute-2: #61718a;
  --on-primary: #ffffff;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;

  /* Spacing */
  --s-xxs: 2px;
  --s-xs: 4px;
  --s-sm: 8px;
  --s-md: 12px;
  --s-lg: 16px;
  --s-xl: 24px;
  --s-xxl: 32px;
  --s-huge: 64px;

  /* Elevation */
  --lift-1: rgba(0, 55, 112, 0.08) 0 1px 3px;
  --lift-2: rgba(0, 55, 112, 0.08) 0 8px 24px, rgba(0, 55, 112, 0.04) 0 2px 6px;

  /* Layout */
  --container: 1200px;
  --section: 96px;

  /* Type — Sohne is proprietary; Inter 300 is the documented substitute. */
  --font: "Inter", "SF Pro Display", system-ui, -apple-system, sans-serif;
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.4;
  letter-spacing: 0;
  font-feature-settings: "ss01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-deep); }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--s-xl);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand-dark-900);
  color: var(--on-primary);
  padding: var(--s-md) var(--s-lg);
  border-radius: var(--r-md);
  z-index: 100;
}
.skip-link:focus { left: var(--s-lg); top: var(--s-lg); color: var(--on-primary); }

/* --------------------------------------------------------------------------
   3. Type scale — display tiers stay at weight 300 with negative tracking
   -------------------------------------------------------------------------- */
.display-xxl,
.display-xl,
.display-lg,
.display-md,
.heading-lg,
.heading-md,
.heading-sm { font-weight: 300; margin: 0; }

.display-xxl { font-size: 56px; line-height: 1.03; letter-spacing: -1.4px; }
.display-xl  { font-size: 48px; line-height: 1.15; letter-spacing: -0.96px; }
.display-lg  { font-size: 32px; line-height: 1.1;  letter-spacing: -0.64px; }
.display-md  { font-size: 26px; line-height: 1.12; letter-spacing: -0.26px; }
.heading-lg  { font-size: 22px; line-height: 1.1;  letter-spacing: -0.22px; }
.heading-md  { font-size: 20px; line-height: 1.4;  letter-spacing: -0.2px; }
.heading-sm  { font-size: 18px; line-height: 1.4;  letter-spacing: 0; }

.body-lg { font-size: 16px; font-weight: 300; line-height: 1.4; }
.body-md { font-size: 15px; font-weight: 300; line-height: 1.4; }

.tabular {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.4;
  letter-spacing: -0.42px;
  font-feature-settings: "tnum";
}

.caption {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: -0.39px;
  font-feature-settings: "tnum";
  color: var(--ink-mute);
}

.micro { font-size: 11px; font-weight: 300; line-height: 1.4; color: var(--ink-mute); }

.eyebrow {
  font-size: 10px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: 0.1px;
  text-transform: uppercase;
}

.muted { color: var(--ink-mute); }
.secondary { color: var(--ink-secondary); }
.lead { font-size: 16px; color: var(--ink-secondary); max-width: 62ch; }

/* --------------------------------------------------------------------------
   4. Buttons — pill only, one filled indigo per band
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-sm);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
  border-radius: var(--r-pill);
  padding: 12px 24px;
  min-height: 44px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary-deep); color: var(--on-primary); }
.btn-primary:active { background: var(--primary-press); }

.btn-secondary { background: var(--canvas); color: var(--primary); border-color: var(--primary); }
.btn-secondary:hover { background: var(--canvas-soft); color: var(--primary-deep); border-color: var(--primary-deep); }

.btn-on-dark { background: var(--brand-dark-900); color: var(--on-primary); }
.btn-on-dark:hover { background: var(--primary); color: var(--on-primary); }

.btn-sm { font-size: 14px; padding: var(--s-sm) var(--s-lg); min-height: 36px; }

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  color: var(--primary);
}
.arrow-link span { transition: transform 120ms ease; }
.arrow-link:hover span { transform: translateX(3px); }

/* --------------------------------------------------------------------------
   5. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  transition: background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom-color: var(--hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-xl);
  padding-block: var(--s-lg);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.3px;
}
.brand:hover { color: var(--ink); }

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: var(--r-md);
  background: var(--primary);
  display: grid;
  place-items: center;
  color: var(--on-primary);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.2px;
}
.brand strong { font-weight: 400; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--ink-mute-2);
  font-size: 15px;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: var(--s-lg); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   6. Hero + gradient mesh
   -------------------------------------------------------------------------- */
.mesh {
  position: relative;
  isolation: isolate;
}
.mesh::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 620px;
  background-image: url("../img/mesh.svg");
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
  z-index: -1;
  pointer-events: none;
}
.mesh--compact::before { height: 430px; }

.hero { padding-block: 88px 96px; }
.hero-inner { max-width: 760px; }
.hero .display-xxl { margin-bottom: var(--s-xl); }
.hero .lead { margin: 0 0 var(--s-xxl); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--s-md); margin-bottom: var(--s-lg); }

.page-hero { padding-block: 72px 56px; }
.page-hero .display-xl { margin-bottom: var(--s-lg); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-subdued);
  color: var(--primary-deep);
  border-radius: var(--r-pill);
  padding: var(--s-xs) var(--s-sm);
  margin-bottom: var(--s-xl);
}

/* --------------------------------------------------------------------------
   7. Sections & grids
   -------------------------------------------------------------------------- */
.section { padding-block: var(--section); }
.section--tight { padding-block: var(--s-huge); }
.section--soft { background: var(--canvas-soft); }

.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head .eyebrow { color: var(--ink-mute); display: block; margin-bottom: var(--s-md); }
.section-head p { margin: var(--s-lg) 0 0; color: var(--ink-secondary); font-size: 16px; }

.grid { display: grid; gap: var(--s-xl); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --------------------------------------------------------------------------
   8. Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-xxl);
  box-shadow: var(--lift-1);
}
.card h3 { margin: 0 0 var(--s-md); }
.card p { margin: 0; color: var(--ink-secondary); }
.card .card-foot { margin-top: var(--s-xl); }

.card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--r-md);
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  display: grid;
  place-items: center;
  margin-bottom: var(--s-xl);
  color: var(--primary);
}

.card-cream {
  background: var(--canvas-cream);
  border: none;
  border-radius: var(--r-lg);
  padding: 48px;
  box-shadow: none;
}
.card-cream p { color: var(--ink); }

.card-dark {
  background: var(--brand-dark-900);
  color: var(--on-primary);
  border: none;
  border-radius: var(--r-lg);
  padding: var(--s-xxl);
}
.card-dark p { color: rgba(255, 255, 255, 0.72); }

/* Credential strip */
.creds {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  background: var(--canvas);
  overflow: hidden;
  box-shadow: var(--lift-1);
}
.cred {
  padding: var(--s-xxl);
  border-right: 1px solid var(--hairline);
}
.cred:last-child { border-right: none; }
.cred strong { display: block; font-weight: 400; font-size: 16px; margin-bottom: 6px; letter-spacing: -0.2px; }
.cred span { color: var(--ink-mute); font-size: 14px; }

/* Numbered process steps */
.step { position: relative; padding-top: var(--s-xl); border-top: 1px solid var(--hairline); }
.step .step-n {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: -0.39px;
  font-feature-settings: "tnum";
  color: var(--primary);
  display: block;
  margin-bottom: var(--s-md);
}
.step h3 { margin: 0 0 var(--s-md); }
.step p { margin: 0; color: var(--ink-secondary); }

/* Detail list used on the services page */
.detail { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: start; }
.detail + .detail { margin-top: var(--s-huge); padding-top: var(--s-huge); border-top: 1px solid var(--hairline); }
.detail h2 { margin: 0 0 var(--s-lg); }
.detail p { color: var(--ink-secondary); margin: 0 0 var(--s-xl); }

.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-md); }
.ticks li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: var(--s-md);
  align-items: start;
  color: var(--ink-secondary);
}
.ticks svg { margin-top: 3px; color: var(--primary); }

/* --------------------------------------------------------------------------
   9. Ops console — the composited product-UI mockup
   -------------------------------------------------------------------------- */
.console {
  background: var(--brand-dark-900);
  border-radius: var(--r-xl);
  box-shadow: var(--lift-2);
  overflow: hidden;
  color: var(--on-primary);
}
.console-bar {
  display: flex;
  align-items: center;
  gap: var(--s-sm);
  padding: var(--s-md) var(--s-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.dot { width: 9px; height: 9px; border-radius: var(--r-pill); display: inline-block; }
.dot-1 { background: var(--ruby); }
.dot-2 { background: var(--canvas-cream); }
.dot-3 { background: var(--primary-soft); }
.console-title {
  margin-left: var(--s-sm);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: -0.39px;
  color: rgba(255, 255, 255, 0.62);
}

.console-body { padding: var(--s-xl); display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--s-lg); }

.panel {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--r-lg);
  padding: var(--s-lg);
  display: flex;
  flex-direction: column;
}
.panel-label {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.1px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--s-md);
  display: block;
}

/* Data rows. Default to the light surface; the dark surfaces override below. */
.rows { display: grid; gap: 9px; }
.row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--s-md);
  align-items: baseline;
  font-size: 14px;
  font-weight: 300;
  letter-spacing: -0.42px;
  font-feature-settings: "tnum";
  color: var(--ink-secondary);
}
.row .val { color: var(--ink-mute); text-align: right; }
.row + .row { border-top: 1px solid var(--hairline); padding-top: 9px; }

.console .row,
.card-dark .row { color: rgba(255, 255, 255, 0.86); }
.console .row .val,
.card-dark .row .val { color: rgba(255, 255, 255, 0.62); }
.console .row + .row,
.card-dark .row + .row { border-top-color: rgba(255, 255, 255, 0.08); }

.chip {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.1px;
  text-transform: uppercase;
  border-radius: var(--r-pill);
  padding: 3px 8px;
  background: rgba(102, 94, 253, 0.22);
  color: var(--primary-subdued);
  white-space: nowrap;
}
.chip-warn { background: rgba(234, 34, 97, 0.18); color: var(--magenta); }

.spark {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  flex: 1;
  min-height: 84px;
  margin-top: var(--s-sm);
}
.spark i {
  flex: 1;
  background: var(--primary-soft);
  border-radius: 2px;
  opacity: 0.75;
  display: block;
}
.spark i:last-child { background: var(--magenta); opacity: 0.9; }

.stat { margin-top: auto; padding-top: var(--s-lg); }
.stat b {
  display: block;
  font-size: 26px;
  font-weight: 300;
  letter-spacing: -0.26px;
  font-feature-settings: "tnum";
}
.stat span { font-size: 11px; color: rgba(255, 255, 255, 0.5); }

/* --------------------------------------------------------------------------
   10. Forms
   -------------------------------------------------------------------------- */
.field { display: grid; gap: 6px; margin-bottom: var(--s-lg); }
.field label { font-size: 13px; font-weight: 400; letter-spacing: -0.39px; color: var(--ink-secondary); }
.field input,
.field select,
.field textarea {
  font-family: var(--font);
  font-size: 15px;
  font-weight: 300;
  color: var(--ink);
  background: var(--canvas);
  border: 1px solid var(--hairline-input);
  border-radius: var(--r-sm);
  padding: 10px var(--s-md);
  min-height: 40px;
  width: 100%;
}
.field textarea { min-height: 132px; resize: vertical; }
.field input:focus,
.field select:focus,
.field textarea:focus { outline: none; border-color: var(--primary); }

/* --------------------------------------------------------------------------
   11. CTA band + footer
   -------------------------------------------------------------------------- */
.cta-band {
  background: var(--brand-dark-900);
  border-radius: var(--r-lg);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-xxl);
  color: var(--on-primary);
}
.cta-band h2 { margin: 0 0 var(--s-md); }
.cta-band p { margin: 0; color: rgba(255, 255, 255, 0.72); max-width: 46ch; }

.footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding-block: var(--s-huge);
  color: var(--ink-mute);
}
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--s-xxl); }
.footer h4 {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.1px;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 var(--s-lg);
}
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer a { color: var(--ink-mute); font-size: 13px; letter-spacing: -0.39px; }
.footer a:hover { color: var(--ink); }
.footer-blurb { font-size: 13px; letter-spacing: -0.39px; max-width: 34ch; margin: var(--s-md) 0 0; }
.footer-legal {
  margin-top: 48px;
  padding-top: var(--s-xl);
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  gap: var(--s-lg);
  flex-wrap: wrap;
  font-size: 11px;
}

/* --------------------------------------------------------------------------
   12. Responsive — display tiers stair-step, grids collapse 4 -> 2 -> 1
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  :root { --section: 72px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .creds { grid-template-columns: repeat(2, 1fr); }
  .cred:nth-child(2) { border-right: none; }
  .cred:nth-child(-n + 2) { border-bottom: 1px solid var(--hairline); }
  .detail { grid-template-columns: 1fr; gap: var(--s-xxl); }
  .console-body { grid-template-columns: 1fr; }
  .display-xxl { font-size: 48px; letter-spacing: -0.96px; }
  .display-xl { font-size: 32px; letter-spacing: -0.64px; }
}

@media (max-width: 767px) {
  :root { --section: 56px; }
  .nav-links,
  .nav-actions .btn { display: none; }
  .nav-toggle { display: grid; place-items: center; }
  .nav.is-open .nav-links {
    display: grid;
    position: absolute;
    left: var(--s-lg);
    right: var(--s-lg);
    top: 72px;
    background: var(--canvas);
    border: 1px solid var(--hairline);
    border-radius: var(--r-lg);
    box-shadow: var(--lift-2);
    padding: var(--s-lg);
    gap: var(--s-lg);
  }
  .nav.is-open .nav-actions .btn { display: none; }

  .grid-2,
  .grid-3,
  .grid-4,
  .creds { grid-template-columns: 1fr; }
  .cred { border-right: none; border-bottom: 1px solid var(--hairline); }
  .cred:last-child { border-bottom: none; }
  .cred:nth-child(-n + 2) { border-bottom: 1px solid var(--hairline); }

  .display-xxl { font-size: 36px; letter-spacing: -0.7px; }
  .display-xl { font-size: 30px; letter-spacing: -0.5px; }
  .display-lg { font-size: 26px; letter-spacing: -0.4px; }

  .hero { padding-block: 56px 64px; }
  .card { padding: var(--s-xl); }
  .card-cream { padding: var(--s-xxl); }
  .cta-band { flex-direction: column; align-items: flex-start; padding: var(--s-xxl); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .console-body { padding: var(--s-lg); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}