/* ==========================================================================
   AgentVista — Global Styles
   Token-driven, hand-written. Loads after tokens.css.
     1 Base   2 Type   3 Layout   4 Buttons   5 Nav
     6 Hero & index      7 Solutions      8 Contact      9 Footer
     10 Motion   11 Responsive   12 Accessibility & print
   ========================================================================== */

/* ---- 1. Base ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
ul, ol { list-style: none; padding: 0; }

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

::selection { background: var(--accent-solid); color: #fff; }

/* ---- 2. Type ---------------------------------------------------------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-snug);
  text-wrap: balance;
}

h1 {
  font-size: var(--fs-hero);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
}

h2 { font-size: var(--fs-3xl); letter-spacing: var(--ls-tight); }
h3 { font-size: var(--fs-lg); }

p { text-wrap: pretty; }
strong { font-weight: 600; color: var(--text); }

.text-muted { color: var(--text-muted); }

.lead {
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--text-muted);
}

.mono { font-family: var(--font-mono); }

.label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--text-faint);
  margin-bottom: var(--sp-5);
}

/* ---- 3. Layout -------------------------------------------------------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--sp-11); }
.section--tight { padding-block: var(--sp-9); }

.section--alt {
  background: var(--bg-elev);
  border-block: 1px solid var(--border);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: center;
}

/* ---- 4. Buttons ------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.btn-primary { background: var(--accent-solid); color: #fff; }
.btn-primary:hover { background: var(--accent-solid-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  background: var(--hover-fill);
  border-color: var(--hover-line);
}

.btn-lg {
  padding: 15px 26px;
  font-size: var(--fs-base);
  border-radius: var(--r-md);
}

/* ---- 5. Nav ----------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--nav-h);
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.nav.is-scrolled {
  background: var(--nav-bg-solid);
  border-bottom-color: var(--border);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  height: 100%;
}

.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo svg { color: var(--accent); }

.logo-word {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  flex: 1;
  justify-content: flex-end;
}

.nav-link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-muted);
  padding-block: 6px;
  transition: color var(--dur) var(--ease);
}

.nav-link:hover,
.nav-link[aria-current="page"] { color: var(--text); }

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1.5px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-menu-cta { display: none; }

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.8px;
  margin-inline: auto;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav.is-open .nav-toggle span:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav-toggle span:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* ---- Theme toggle ------------------------------------------------------ */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition:
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.theme-toggle svg { width: 16px; height: 16px; }

[data-theme="dark"]  .theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* ---- 6. Hero & capability index --------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(72px, 11vw, 148px);
}

.hero::before {
  content: "";
  position: absolute;
  inset: -50% 0 auto;
  height: 120%;
  background: radial-gradient(
    ellipse 50% 55% at 50% 0%,
    var(--accent-glow),
    transparent 70%
  );
  opacity: 0.5;
  pointer-events: none;
}

.hero .container { position: relative; }

.hero h1 { max-width: 18ch; margin-bottom: var(--sp-5); }
.hero .lead { max-width: 52ch; margin-bottom: var(--sp-7); }

.index-list { border-top: 1px solid var(--border); }

.index-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) minmax(0, 1.6fr) 20px;
  gap: var(--sp-5);
  align-items: baseline;
  padding-block: var(--sp-6);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--dur) var(--ease);
}

.index-row:hover { background: var(--hover-wash); }

.index-num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
}

.index-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 600;
  letter-spacing: var(--ls-snug);
}

.index-desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.index-arrow {
  color: var(--text-faint);
  transition:
    transform var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.index-row:hover .index-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  margin-top: var(--sp-9);
}

.cta-row h2 { font-size: var(--fs-2xl); }

/* ---- 7. Solutions ----------------------------------------------------- */
.page-head {
  position: relative;
  overflow: hidden;
  padding-block: clamp(48px, 7vw, 88px);
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
}

.page-head::before {
  content: "";
  position: absolute;
  inset: -70% 0 auto;
  height: 170%;
  background: radial-gradient(
    ellipse 50% 50% at 50% 0%,
    var(--accent-glow),
    transparent 70%
  );
  opacity: 0.4;
  pointer-events: none;
}

.page-head .container { position: relative; }
.page-head h1 { margin-bottom: var(--sp-4); }

.solution {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
  gap: var(--sp-9);
  padding-block: var(--sp-9);
  border-bottom: 1px solid var(--border);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}

.solution:last-of-type { border-bottom: 0; }

.solution-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  margin-bottom: var(--sp-3);
}

.solution h2 { font-size: var(--fs-2xl); }

.solution-body > .lead { margin-bottom: var(--sp-6); }

.bullets { display: grid; gap: var(--sp-3); }

.bullets li {
  position: relative;
  padding-left: 22px;
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.bullets li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---- 8. About --------------------------------------------------------- */
.about-body {
  max-width: 68ch;
  display: grid;
  gap: var(--sp-5);
  margin-top: var(--sp-6);
}

.about-body p {
  color: var(--text-muted);
  font-size: var(--fs-md);
  line-height: 1.65;
}

/* Roles: two per row, plain text, no rules */
.roles {
  margin-top: var(--sp-6);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-6) var(--sp-8);
}

.roles h3 { font-size: var(--fs-md); margin-bottom: var(--sp-1); }

.roles p { font-size: var(--fs-md); color: var(--text-muted); }

.apply { color: var(--accent); font-weight: 600; white-space: nowrap; }
.apply:hover { color: var(--accent-hi); }

/* ---- 9. Contact ------------------------------------------------------- */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: var(--sp-9);
  align-items: start;
}

.contact-email {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--accent);
  transition: color var(--dur) var(--ease);
}

.contact-email:hover { color: var(--accent-hi); }

.contact-note {
  margin-top: var(--sp-3);
  font-size: var(--fs-md);
  color: var(--text-muted);
}

.contact-note:first-of-type { margin-top: var(--sp-5); }

.contact-note a {
  color: var(--accent);
  font-weight: 600;
  transition: color var(--dur) var(--ease);
}

.contact-note a:hover { color: var(--accent-hi); }

.form { display: grid; gap: var(--sp-5); }
.field { display: grid; gap: var(--sp-2); }

.field label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-muted);
}

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
  border-radius: var(--r-md);
  font-size: var(--fs-sm);
  color: var(--text);
  transition: border-color var(--dur) var(--ease);
}

.field input::placeholder,
.field textarea::placeholder { color: var(--text-faint); }

.field input:hover,
.field textarea:hover { border-color: var(--border-strong); }

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.field textarea { min-height: 140px; resize: vertical; }

.form-sent {
  padding: var(--sp-6);
  background: var(--ok-soft);
  border: 1px solid var(--sent-border);
  border-radius: var(--r-lg);
}

.form-sent h2 { font-size: var(--fs-lg); margin-bottom: var(--sp-2); }
.form-sent p { font-size: var(--fs-sm); color: var(--text-muted); }

/* ---- 10. Footer -------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--sp-7);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

.footer-brand { font-size: var(--fs-sm); color: var(--text-faint); }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6);
  font-size: var(--fs-sm);
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--dur) var(--ease);
}

.footer-links a:hover { color: var(--text); }

/* Theme cross-fade: switching dark/light eases instead of snapping */
body,
.nav,
.footer,
.page-head,
.section--alt,
.field input,
.field textarea,
.theme-toggle,
.index-row,
.nav-link,
.footer-links a {
  transition:
    background-color 510ms var(--ease),
    border-color 510ms var(--ease),
    color 510ms var(--ease);
}

/* ---- 11. Motion ------------------------------------------------------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--dur-slow) var(--ease),
    transform var(--dur-slow) var(--ease);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.js [data-reveal]:nth-child(2) { transition-delay: 90ms; }
.js [data-reveal]:nth-child(3) { transition-delay: 180ms; }
.js [data-reveal]:nth-child(4) { transition-delay: 270ms; }

/* Section labels scale in from the left instead of just rising */
.js .label[data-reveal] {
  transform: translateY(8px) scale(0.94);
  transform-origin: left center;
}

.js .label[data-reveal].is-visible { transform: none; }

/* Slow breathing glow behind the hero and page headers */
@keyframes glow-drift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50%      { transform: translate3d(0, 3%, 0) scale(1.05); }
}

.hero::before,
.page-head::before {
  animation: glow-drift 27s ease-in-out infinite;
}

/* ---- 12. Responsive --------------------------------------------------- */
@media (max-width: 900px) {
  .section { padding-block: var(--sp-9); }

  /* Index rows: description drops below the title */
  .index-row {
    grid-template-columns: 40px minmax(0, 1fr);
    row-gap: var(--sp-2);
  }

  .index-arrow { display: none; }
  .index-desc { grid-column: 2; }

  .solution,
  .contact {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-6);
  }

  .solution { padding-block: var(--sp-8); }

  /* --- Mobile nav --- */
  .nav-menu {
    position: absolute;
    top: var(--nav-h);
    left: calc(var(--gutter) * -1);
    right: calc(var(--gutter) * -1);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--sp-3) var(--gutter) var(--sp-5);
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
  }

  .nav.is-open .nav-menu { display: flex; }

  .nav-menu .nav-link {
    padding: var(--sp-4) 0;
    font-size: var(--fs-md);
    border-bottom: 1px solid var(--border);
  }

  .nav-menu .nav-link::after { display: none; }

  .nav-menu-cta {
    display: block;
    margin-top: var(--sp-4);
    padding: 14px 20px;
    text-align: center;
  }

  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 640px) {
  :root { --gutter: 20px; }

  .cta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn-row .btn { flex: 1 1 auto; }

  .roles { grid-template-columns: minmax(0, 1fr); }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---- 13. Accessibility & print ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal],
  .js .label[data-reveal] {
    opacity: 1;
    transform: none;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -60px;
  left: var(--gutter);
  z-index: 100;
  padding: 12px 18px;
  background: var(--accent-solid);
  color: #fff;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 0; }

@media print {
  .nav, .footer, .hero::before, .page-head::before { display: none; }
  body { background: #fff; color: #000; }
}