/* ==========================================================================
   Akọ AI — akoai.uk
   Foundation stylesheet. Design tokens and base styles only.
   Components (nav, hero, cards, footer) are to be built on top of this.

   PRINCIPLE: zero third-party requests. No Google Fonts, no CDN libraries,
   no trackers. Faster, nothing external to break, and no visitor IP is sent
   to a third party — which matters for a company selling data discipline.
   ========================================================================== */

:root {
  /* Brand palette — sampled from the official brand background.
     Do not invent new brand colours; extend from these. */
  --navy-900:  #001543;   /* deepest — footers, hero base            */
  --navy-800:  #021C56;
  --navy-700:  #062B71;
  --blue-600:  #1048A1;   /* sampled from the brand glow             */
  --blue-500:  #1C6FD6;   /* links, buttons                          */
  --cyan-400:  #22B5F0;   /* accent, from the chevron mark           */

  /* Neutrals — body text and surfaces on light backgrounds */
  --ink:       #10151F;
  --ink-muted: #51607A;
  --line:      #DDE3EC;
  --surface:   #F4F7FA;
  --white:     #FFFFFF;

  /* Type — system stack, so nothing is fetched from another server */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;

  /* Rhythm */
  --measure: 68ch;        /* max line length for readable prose      */
  --wrap:    1120px;      /* page container                          */
  --gutter:  clamp(1rem, 4vw, 2.5rem);
  --radius:  10px;
}

/* --- reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--blue-500); }

/* --- type ----------------------------------------------------------------- */
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2rem, 1.3rem + 3.2vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.25rem); font-weight: 700; }
h3 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.375rem); font-weight: 600; }
p  { margin: 0 0 1.1em; max-width: var(--measure); }
.lead { font-size: 1.2em; color: var(--ink-muted); }

/* --- layout --------------------------------------------------------------- */
.wrap    { width: 100%; max-width: var(--wrap); margin-inline: auto;
           padding-inline: var(--gutter); }
section  { padding-block: clamp(3rem, 7vw, 6rem); }
.section-dark { background: var(--navy-900); color: var(--white); }
.section-dark .lead { color: #AFC0DC; }
.section-tint { background: var(--surface); }

/* --- accessibility -------------------------------------------------------- */
:focus-visible { outline: 3px solid var(--cyan-400); outline-offset: 2px; }
.skip-link {
  position: absolute; left: -9999px;
  background: var(--navy-900); color: var(--white);
  padding: 0.75rem 1rem; z-index: 100;
}
.skip-link:focus { left: var(--gutter); top: 0.5rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important;
                           transition-duration: 0.01ms !important; }
}

/* --- shared header -------------------------------------------------------- */
.site-header {
  background: var(--navy-900);
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}
.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 0.9rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--white);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}
.brand img { width: 2.25rem; height: 2.25rem; object-fit: contain; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 0.15rem; }
.nav a {
  color: var(--white);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 0.65rem;
  border-radius: 5px;
}
.nav a:hover, .nav a:focus-visible { background: rgba(255, 255, 255, 0.13); }

/* --- hero and page headings ---------------------------------------------- */
.hero, .page-hero {
  color: var(--white);
  background-color: var(--navy-900);
  background-image: linear-gradient(90deg, rgba(0, 21, 67, 0.96), rgba(0, 21, 67, 0.73)), url("../img/hero-bg.jpg");
  background-size: cover;
  background-position: center;
}
.hero { padding-block: clamp(5rem, 11vw, 9rem); }
.page-hero { padding-block: clamp(4rem, 8vw, 6rem); }
.hero-inner { max-width: var(--wrap); }
.hero h1 { max-width: 19ch; }
.page-hero h1 { max-width: 22ch; }
.hero-copy {
  max-width: 60ch;
  color: var(--white);
  font-size: clamp(1.05rem, 0.96rem + 0.5vw, 1.3rem);
  line-height: 1.55;
  margin-bottom: 1.6rem;
}
.eyebrow {
  color: var(--blue-600);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.35;
  margin-bottom: 0.9rem;
  text-transform: uppercase;
}
.hero .eyebrow, .page-hero .eyebrow, .section-dark .eyebrow { color: var(--cyan-400); }

/* --- calls to action ------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  max-width: 100%;
  min-height: 3rem;
  padding: 0.7rem 1.2rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
}
.btn-primary { color: var(--white); background: var(--blue-500); }
.btn-primary:hover { background: var(--blue-600); }
.btn-light { color: var(--navy-900); background: var(--white); }
.btn-light:hover { background: var(--surface); }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; }
.text-link { color: var(--white); font-weight: 700; text-underline-offset: 0.2em; }

/* --- content -------------------------------------------------------------- */
.split { display: grid; gap: 1.5rem 4rem; }
.split > * { min-width: 0; }
.split h2 { max-width: 18ch; }
.prose p:last-child { margin-bottom: 0; }
.section-intro { color: var(--ink-muted); margin-bottom: 2rem; }
.card-grid { display: grid; gap: 1rem; }
.card {
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 1.8rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.card-number { display: block; color: var(--blue-600); font-weight: 800; font-size: 0.85rem; margin-bottom: 1.2rem; }
.card p { color: var(--ink-muted); font-size: 0.95rem; margin-bottom: 0; }
.steps { display: grid; gap: 1.5rem; margin: 2rem 0; padding: 0; list-style: none; }
.steps li { display: flex; gap: 1rem; min-width: 0; }
.step-number {
  display: grid;
  place-items: center;
  flex: 0 0 2.4rem;
  width: 2.4rem;
  height: 2.4rem;
  color: var(--white);
  background: var(--navy-700);
  border-radius: 50%;
  font-size: 0.95rem;
  font-weight: 700;
}
.steps h3 { margin-top: 0.25rem; }
.steps p { color: var(--ink-muted); margin-bottom: 0; }
.note { max-width: 65ch; padding: 1rem 1.25rem; border-left: 4px solid var(--blue-500); background: var(--white); margin-bottom: 0; }
.fact-list { display: grid; gap: 0.75rem; padding: 0; margin: 1.75rem 0 0; list-style: none; }
.fact-list li { padding: 0.8rem 1rem; background: var(--white); border: 1px solid var(--line); border-radius: 6px; font-weight: 600; }
.cta-inner { display: grid; align-items: center; gap: 1.5rem 3rem; }
.cta-inner h2 { max-width: 22ch; }
.cta-inner p:last-child { color: var(--white); margin-bottom: 0; }
.cta-inner .btn { justify-self: start; }
.contact-grid { display: grid; gap: 3rem; }
.contact-email { font-size: clamp(1.15rem, 1rem + 1vw, 1.65rem); font-weight: 700; overflow-wrap: anywhere; text-underline-offset: 0.2em; }
.contact-panel { padding: clamp(1.4rem, 4vw, 2.25rem); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.contact-panel h2 { font-size: clamp(1.35rem, 1.15rem + 1vw, 1.75rem); }
.check-list { padding-left: 1.25rem; margin: 1.25rem 0; }
.check-list li { margin-bottom: 0.65rem; padding-left: 0.25rem; }
.check-list li::marker { color: var(--blue-600); }
.contact-panel p:last-child { margin-bottom: 0; }
.privacy-copy { max-width: 76ch; }
.privacy-copy h2 { margin-top: 1.6em; }
.privacy-copy h2:first-child { margin-top: 0; }
.privacy-copy ul { padding-left: 1.5rem; }
.privacy-copy li { margin-bottom: 0.5rem; }
.error-hero { min-height: 55vh; display: flex; align-items: center; }

/* --- shared footer -------------------------------------------------------- */
.site-footer { color: var(--white); background: var(--navy-900); padding-block: 3rem 1.25rem; }
.footer-inner { display: grid; gap: 1.5rem; }
.footer-brand { color: var(--white); font-weight: 700; font-size: 1.2rem; margin-bottom: 0.45rem; }
.site-footer p { color: var(--white); font-size: 0.9rem; }
.footer-links { display: flex; flex-direction: column; align-items: flex-start; gap: 0.65rem; }
.footer-links a { color: var(--white); font-size: 0.9rem; text-underline-offset: 0.2em; }
.footer-bottom { padding-top: 1.25rem; border-top: 1px solid rgba(255, 255, 255, 0.2); color: var(--white); font-size: 0.8rem; }

@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fact-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: 1fr auto; }
}
@media (min-width: 800px) {
  .split { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); }
  .card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
  .steps li { display: block; }
  .step-number { margin-bottom: 1rem; }
  .cta-inner { grid-template-columns: 1fr auto; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1000px) {
  .fact-list { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}


/* --- animated pipeline diagram -------------------------------------------
   Base state is VISIBLE. Animation enhances; it never reveals. If animation
   is disabled or fails, the full diagram still reads.                      */
.pipeline { margin: 1.75rem 0 0; max-width: 640px; }
.pipeline svg {
  display: block; width: 100%; height: auto;
  aspect-ratio: 560 / 150;          /* guarantees height even if auto fails */
  overflow: visible;
}
.pl-frame { fill: #FFFFFF; stroke: #B9C6DA; stroke-width: 1.8; }
.pl-body  { fill: none; stroke: #43506B; stroke-width: 2.2; stroke-linecap: round; }
.pl-box   { fill: none; stroke: var(--blue-500); stroke-width: 1.8; stroke-dasharray: 5 4; }
.pl-kp circle { fill: var(--cyan-400); }
.pl-track { fill: none; stroke: var(--cyan-400); stroke-width: 2.2; stroke-linecap: round; }
.pl-bar   { stroke: var(--blue-600); stroke-width: 7; stroke-linecap: round; }
.pl-tick  { fill: none; stroke: #0E9F6E; stroke-width: 2.8;
            stroke-linecap: round; stroke-linejoin: round; }
.pl-flow  { stroke: #B9C6DA; stroke-width: 2; stroke-dasharray: 6 5; }
.pl-scan  { opacity: 0; }

@media (prefers-reduced-motion: no-preference) {
  .pl-scan  { animation: plScan 7s ease-in-out infinite; }
  .pl-flow  { animation: plMarch 1.4s linear infinite; }
  .pl-box, .pl-kp circle { animation: plPulse 7s ease-in-out infinite; animation-delay: 2.2s; }
  .pl-bar.b1 { animation: plPulse 7s ease-in-out infinite; animation-delay: 4.1s; }
  .pl-bar.b2 { animation: plPulse 7s ease-in-out infinite; animation-delay: 4.3s; }
  .pl-bar.b3 { animation: plPulse 7s ease-in-out infinite; animation-delay: 4.5s; }
  .pl-track { stroke-dasharray: 44; animation: plDraw44 7s ease-in-out infinite; animation-delay: 2.9s; }
  .pl-tick  { stroke-dasharray: 40; animation: plDraw40 7s ease-in-out infinite; animation-delay: 4.8s; }
}
@keyframes plScan   { 0%,6% { transform: translateY(0); opacity: 0 }
                      10% { opacity: .9 } 26% { transform: translateY(78px); opacity: .9 }
                      32%,100% { opacity: 0 } }
@keyframes plPulse  { 0%,10% { opacity: .25 } 30%,100% { opacity: 1 } }
@keyframes plDraw44 { 0%,8% { stroke-dashoffset: 44 } 34%,100% { stroke-dashoffset: 0 } }
@keyframes plDraw40 { 0%,8% { stroke-dashoffset: 40 } 34%,100% { stroke-dashoffset: 0 } }
@keyframes plMarch  { to { stroke-dashoffset: -22 } }

.pipeline-labels {
  display: grid; grid-template-columns: repeat(3, 1fr);
  max-width: 640px; margin-top: 0.4rem;
  font-size: 0.78rem; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-muted); text-align: center;
}

/* --- small inline assurance icons ----------------------------------------
   Deliberately small: a quiet mark beside the words, not a badge.          */
.assurance-list, .commitments { list-style: none; padding: 0; margin: 1.25rem 0 0; }
.assurance-list { display: grid; gap: 0.55rem;
                  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.assurance-list li, .commitments li {
  display: flex; align-items: baseline; gap: 0.55rem; margin-bottom: 0.55rem;
}
.assurance-list li { font-weight: 600; }
.commitments li { margin-bottom: 0.8rem; }
.assurance-icon, .commitment-icon {
  flex: 0 0 auto; width: 1.05em; height: 1.05em;
  position: relative; top: 0.12em; color: var(--blue-500);
}
.assurance-icon svg, .commitment-icon svg { width: 100%; height: 100%; display: block; }
.assurance-icon .strike, .commitment-icon .strike { stroke: var(--blue-500); stroke-width: 2.6; }
.assurance-note { margin-top: 0.9rem; color: var(--ink-muted); font-size: 0.95rem; }