/* ==========================================================================
   Trivinci — Design tokens
   ========================================================================== */
:root {
  /* Surfaces */
  --bg:            oklch(0.07 0 0);
  --surface-dark:  oklch(0.12 0 0);
  --surface-paper: oklch(0.97 0.003 90);
  --border-dark:   oklch(1 0 0 / 0.10);
  --border-dark-strong: oklch(1 0 0 / 0.18);
  --border-paper:  oklch(0 0 0 / 0.10);

  /* Ink */
  --ink:            oklch(0.98 0 0);
  --ink-muted:      oklch(0.98 0 0 / 0.68);
  --ink-faint:      oklch(0.98 0 0 / 0.45);
  --ink-on-paper:       oklch(0.16 0 0);
  --ink-on-paper-muted: oklch(0.16 0 0 / 0.62);

  /* Brand */
  --primary:      oklch(0.62 0.19 232);
  --primary-hi:   oklch(0.68 0.19 232);
  --primary-ink:  oklch(0.99 0 0);
  --primary-dim:  oklch(0.62 0.19 232 / 0.16);
  --accent:       oklch(0.72 0.17 45);
  --accent-ink:   oklch(0.12 0 0);

  /* Type */
  --font-sans: "General Sans", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --text-hero: clamp(2.75rem, 2rem + 3.2vw, 5.5rem);
  --text-h2:   clamp(2rem, 1.6rem + 1.8vw, 3.5rem);
  --text-h3:   clamp(1.375rem, 1.2rem + 0.8vw, 1.875rem);
  --text-lead: clamp(1.125rem, 1.05rem + 0.35vw, 1.375rem);
  --text-body: 1rem;
  --text-small: 0.875rem;

  /* Space (8px scale) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --space-11: 10rem;

  --container: 1200px;
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);

  /* z-index scale */
  --z-nav: 100;
  --z-toast: 500;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  font-size: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
h1, h2, h3, h4 { font-weight: 500; line-height: 1.12; }

.text-balance { text-wrap: balance; }
p { text-wrap: pretty; }
.text-muted { color: var(--ink-faint); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: var(--primary-ink);
  padding: var(--space-3) var(--space-5);
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow { max-width: 800px; }

@media (max-width: 640px) {
  .container { padding-inline: var(--space-5); }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border-radius: 999px;
  padding: 0.85rem 1.75rem;
  font-size: var(--text-small);
  font-weight: 500;
  white-space: nowrap;
  box-shadow: 0 0 0 0 oklch(0.62 0.19 232 / 0);
  transition: background-color 0.3s var(--ease-out-quart), color 0.3s var(--ease-out-quart), border-color 0.3s var(--ease-out-quart), transform 0.2s var(--ease-out-quart), box-shadow 0.35s var(--ease-out-quart);
}
.btn:active { transform: scale(0.97); }

.btn--primary {
  background: var(--primary);
  color: var(--primary-ink);
}
.btn--primary:hover { background: var(--primary-hi); }
.btn--primary:hover, .btn--primary:focus-visible {
  box-shadow: 0 0 0 1px var(--primary-hi), 0 0 28px 6px oklch(0.62 0.19 232 / 0.5);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border-dark-strong);
}
.btn--ghost:hover { background: var(--surface-dark); }
.btn--ghost:hover, .btn--ghost:focus-visible {
  border-color: var(--primary-hi);
  box-shadow: 0 0 20px 2px oklch(0.62 0.19 232 / 0.3);
}
.tier--featured .btn--ghost:hover, .tier--featured .btn--ghost:focus-visible {
  box-shadow: 0 0 20px 2px oklch(0.62 0.19 232 / 0.22);
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: background-color 0.01s, color 0.01s, border-color 0.01s, box-shadow 0.01s; }
  .btn:active { transform: none; }
}

.btn--lg { padding: 1.05rem 2.25rem; font-size: 1rem; }
.btn--sm { padding: 0.65rem 1.35rem; }

@media (max-width: 640px) {
  .nav__actions .btn--sm { display: none; }
}

/* ==========================================================================
   Pill / badge
   ========================================================================== */
.pill {
  display: inline-flex;
  align-items: center;
  background: var(--primary-dim);
  color: var(--primary-hi);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: var(--text-small);
  font-weight: 500;
  margin-bottom: var(--space-5);
}

/* ==========================================================================
   Nav
   ========================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.35s var(--ease-out-quart), border-color 0.35s var(--ease-out-quart);
}
.nav.is-scrolled {
  background: oklch(0.07 0 0 / 0.85);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border-dark);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}
.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.nav__logo-mark {
  width: 22px;
  height: auto;
  display: block;
}
.nav__links {
  display: flex;
  gap: var(--space-6);
  font-size: var(--text-small);
  color: var(--ink-muted);
}
.nav__links a { transition: color 0.2s var(--ease-out-quart); }
.nav__links a:hover { color: var(--ink); }

.nav__actions { display: flex; align-items: center; gap: var(--space-4); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.3s var(--ease-out-quart), opacity 0.3s var(--ease-out-quart);
}

@media (max-width: 860px) {
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: oklch(0.07 0 0 / 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-dark);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease-out-quart);
  }
  .nav__links a {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-dark);
  }
  .nav__links.is-open { max-height: 320px; }
  .nav__toggle { display: flex; }
  .nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-block: var(--space-9) var(--space-10); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-9);
  align-items: center;
}
.hero__headline {
  font-size: var(--text-hero);
  letter-spacing: -0.03em;
}
.hero__lead {
  margin-top: var(--space-5);
  max-width: 46ch;
  font-size: var(--text-lead);
  color: var(--ink-muted);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-7);
}
.hero__meta {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-dark);
  color: var(--ink-faint);
  font-size: var(--text-small);
  max-width: 46ch;
}

/* Hero visual: stacked ad-feed mockup cards (illustrative, not real data) */
.hero__visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.feed-card {
  background: var(--surface-paper);
  border-radius: 20px;
  padding: var(--space-5);
  color: var(--ink-on-paper);
  box-shadow: 0 24px 48px -24px oklch(0 0 0 / 0.6);
}
.feed-card--a { transform: translateX(0) rotate(-1.2deg); }
.feed-card--b { transform: translateX(2rem) rotate(0.8deg); }
.feed-card--c { transform: translateX(-0.5rem) rotate(-0.4deg); }

.feed-card__frame {
  aspect-ratio: 9 / 7;
  border-radius: 14px;
  background: linear-gradient(160deg, oklch(0.62 0.19 232 / 0.18), oklch(0.16 0 0 / 0.06));
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.feed-card__frame--alt {
  background: linear-gradient(160deg, oklch(0.72 0.17 45 / 0.22), oklch(0.16 0 0 / 0.06));
}
.feed-card__tag {
  align-self: flex-start;
  background: oklch(0.16 0 0 / 0.85);
  color: var(--ink);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
}
.feed-card__bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 34px;
}
.feed-card__bars span {
  flex: 1;
  background: oklch(0.16 0 0 / 0.35);
  border-radius: 3px;
}
.feed-card__bars span:nth-child(1) { height: 60%; }
.feed-card__bars span:nth-child(2) { height: 100%; background: var(--primary); }
.feed-card__bars span:nth-child(3) { height: 40%; }
.feed-card__label {
  margin-top: var(--space-3);
  font-size: var(--text-small);
  font-weight: 500;
}

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { flex-direction: row; overflow-x: auto; padding-bottom: var(--space-3); }
  .feed-card { flex: 0 0 220px; transform: none !important; }
}

/* ==========================================================================
   Why
   ========================================================================== */
.why {
  padding-block: var(--space-9);
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}
.why h2 { font-size: var(--text-h2); max-width: 20ch; }
.why__lead {
  margin-top: var(--space-6);
  max-width: 62ch;
  font-size: var(--text-lead);
  color: var(--ink-muted);
}

/* ==========================================================================
   Section heading pattern
   ========================================================================== */
.value, .services, .process, .engagements, .faq { padding-block: var(--space-10); }
.value h2, .services h2, .process h2, .engagements h2, .faq h2 { font-size: var(--text-h2); max-width: 18ch; }
.section-lead {
  margin-top: var(--space-4);
  max-width: 60ch;
  font-size: var(--text-lead);
  color: var(--ink-muted);
}

/* ==========================================================================
   Value grid (asymmetric — one lead item + three supporting)
   ========================================================================== */
.value__grid {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 1px;
  background: var(--border-dark);
  border: 1px solid var(--border-dark);
  border-radius: 20px;
  overflow: hidden;
}
.value__item {
  background: var(--bg);
  padding: var(--space-7) var(--space-6);
}
.value__item--lg {
  grid-column: 1 / -1;
  background: var(--surface-paper);
  color: var(--ink-on-paper);
  padding: var(--space-8) var(--space-7);
}
.value__item--lg h3 { font-size: var(--text-h3); max-width: 22ch; }
.value__item--lg p { margin-top: var(--space-4); max-width: 55ch; color: var(--ink-on-paper-muted); font-size: var(--text-lead); }
.value__item h3 { font-size: 1.125rem; font-weight: 500; }
.value__item p { margin-top: var(--space-3); color: var(--ink-muted); font-size: 0.95rem; }

@media (max-width: 760px) {
  .value__grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Services — editorial list, not cards
   ========================================================================== */
.service-list { margin-top: var(--space-8); border-top: 1px solid var(--border-dark); }
.service-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) 1.6fr;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--border-dark);
  transition: padding-left 0.35s var(--ease-out-quart), background-color 0.35s var(--ease-out-quart);
}
.service-row:hover { padding-left: var(--space-4); background: var(--surface-dark); }
.service-row__name { font-size: 1.375rem; font-weight: 500; letter-spacing: -0.01em; }
.service-row__desc { color: var(--ink-muted); max-width: 56ch; align-self: center; }

@media (max-width: 700px) {
  .service-row { grid-template-columns: 1fr; gap: var(--space-2); }
}

/* ==========================================================================
   Process
   ========================================================================== */
.process__steps {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-7);
}
.process__step { position: relative; padding-top: var(--space-6); border-top: 1px solid var(--border-dark-strong); }
.process__num {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary-hi);
  margin-bottom: var(--space-4);
}
.process__step h3 { font-size: var(--text-h3); }
.process__step p { margin-top: var(--space-3); color: var(--ink-muted); }

@media (max-width: 760px) {
  .process__steps { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Comparison table
   ========================================================================== */
.compare-table-wrap {
  margin-top: var(--space-8);
  overflow-x: auto;
  border: 1px solid var(--border-dark-strong);
  border-radius: 16px;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 0.9rem;
}
.compare-table th, .compare-table td {
  text-align: left;
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-dark);
  vertical-align: top;
  font-variant-numeric: tabular-nums;
}
.compare-table thead th {
  color: var(--ink-faint);
  font-weight: 500;
  font-size: 0.8rem;
  white-space: nowrap;
}
.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table th[scope="row"] {
  font-weight: 600;
  color: var(--ink);
}
.compare-table th[scope="row"] span,
.compare-table td span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--ink-faint);
}
.compare-table__savings {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.05rem;
}

/* ==========================================================================
   Engagements / pricing tiers
   ========================================================================== */
.tiers {
  margin-top: var(--space-8);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.tier {
  border: 1px solid var(--border-dark-strong);
  border-radius: 20px;
  padding: var(--space-7) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.tier--featured {
  background: var(--surface-paper);
  color: var(--ink-on-paper);
  border-color: transparent;
}
.tier h3 { font-size: 1.5rem; }
.tier__price {
  font-size: 2.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.tier__price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--ink-muted);
}
.tier--featured .tier__price span { color: var(--ink-on-paper-muted); }
.tier__badge {
  align-self: flex-start;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}
.tier__for { color: var(--ink-muted); font-size: 0.95rem; }
.tier--featured .tier__for { color: var(--ink-on-paper-muted); }
.tier__list { display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.tier__list li {
  padding-left: 1.4rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--ink-muted);
}
.tier--featured .tier__list li { color: var(--ink-on-paper-muted); }
.tier__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--primary);
}
.tier--featured .btn--primary { }
.tier .btn { align-self: flex-start; }
.tier--featured .btn--ghost { border-color: var(--border-paper); color: var(--ink-on-paper); }
.tier--featured .btn--ghost:hover { background: oklch(0 0 0 / 0.06); }

.agency-math {
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-dark-strong);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.tier--featured .agency-math { border-top-color: var(--border-paper); }
.agency-math__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-hi);
}
.tier--featured .agency-math__label { color: var(--primary); }
.agency-math p:not(.agency-math__label):not(.agency-math__why) {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.85rem;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}
.tier--featured .agency-math p:not(.agency-math__label):not(.agency-math__why) { color: var(--ink-on-paper-muted); }
.agency-math p:not(.agency-math__label):not(.agency-math__why) span:last-child {
  text-align: right;
  color: var(--ink);
  font-weight: 500;
}
.tier--featured .agency-math p:not(.agency-math__label):not(.agency-math__why) span:last-child { color: var(--ink-on-paper); }
.agency-math__why {
  margin-top: var(--space-1);
  font-size: 0.85rem;
  color: var(--ink-muted);
}
.tier--featured .agency-math__why { color: var(--ink-on-paper-muted); }

/* ==========================================================================
   FAQ / accordion
   ========================================================================== */
.accordion { margin-top: var(--space-8); border-top: 1px solid var(--border-dark); }
.accordion__item { border-bottom: 1px solid var(--border-dark); }
.accordion__trigger {
  width: 100%;
  text-align: left;
  padding: var(--space-6) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: 1.1rem;
  font-weight: 500;
}
.accordion__trigger::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--ink-faint);
  transition: transform 0.3s var(--ease-out-quart);
}
.accordion__trigger[aria-expanded="true"]::after { transform: rotate(45deg); }

.accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out-quart);
}
.accordion__panel p {
  padding-bottom: var(--space-6);
  max-width: 65ch;
  color: var(--ink-muted);
}
.accordion__item.is-open .accordion__panel { max-height: 240px; }

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band {
  margin: var(--space-9) auto;
  max-width: calc(var(--container) - var(--space-6) * 2);
  background: var(--surface-paper);
  color: var(--ink-on-paper);
  border-radius: 28px;
  padding-block: var(--space-9);
}
.cta-band__inner { text-align: center; display: flex; flex-direction: column; align-items: center; }
.cta-band h2 { font-size: var(--text-h2); max-width: 18ch; }
.cta-band p { margin-top: var(--space-4); max-width: 50ch; color: var(--ink-on-paper-muted); font-size: var(--text-lead); }
.cta-band__actions { margin-top: var(--space-6); }
.cta-band__perks {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-5);
  font-size: 0.85rem;
  color: var(--ink-on-paper-muted);
}
.cta-band__perks li {
  padding-left: 1.2rem;
  position: relative;
}
.cta-band__perks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--primary);
}
.cta-band__note { margin-top: var(--space-5); font-size: var(--text-small); color: var(--ink-on-paper-muted); }
.cta-band__note a { color: var(--primary); font-weight: 500; }

@media (max-width: 640px) {
  .cta-band { border-radius: 20px; padding-inline: var(--space-5); }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { padding-block: var(--space-8); border-top: 1px solid var(--border-dark); }
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  justify-content: space-between;
  align-items: center;
}
.footer__tag { color: var(--ink-faint); font-size: var(--text-small); margin-top: var(--space-1); }
.footer__links { display: flex; gap: var(--space-5); font-size: var(--text-small); color: var(--ink-muted); flex-wrap: wrap; }
.footer__links a:hover { color: var(--ink); }
.footer__copy { width: 100%; margin-top: var(--space-5); font-size: 0.8rem; color: var(--ink-faint); }

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal {
  opacity: 1;
  transform: none;
}
/* Only hide-then-reveal once script.js has confirmed it's running (.js-ready on <html>).
   Without that guard, a JS failure would leave every .reveal section permanently invisible. */
@media (prefers-reduced-motion: no-preference) {
  .js-ready .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out-quart), transform 0.7s var(--ease-out-quart);
  }
  .js-ready .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}