/* ==========================================================================
   Programs Source — global styles
   Palette is fixed by the PRD. Only these five hex values are used directly;
   tints and borders are derived from them with color-mix / alpha.
   Theme tokens are set on :root and re-pointed by [data-theme="dark"].
   ========================================================================== */

:root {
  /* Brand palette (PRD) */
  --graphite: #202923;
  --emerald: #15966B;
  --sage: #A7CDBB;
  --silver: #858C87;
  --warm-white: #F5F5F0;

  /* Light theme */
  color-scheme: light;
  --bg-main: var(--warm-white);
  --text-primary: var(--graphite);
  --text-secondary: var(--silver);
  --accent-primary: var(--emerald);
  --bg-secondary: var(--sage);

  /* Inverted panels: contact section and footer */
  --panel-bg: var(--graphite);
  --panel-text: var(--warm-white);
  --panel-accent: var(--sage);

  /* Derived tokens */
  --border: color-mix(in srgb, var(--text-primary) 14%, transparent);
  --border-strong: color-mix(in srgb, var(--text-primary) 28%, transparent);
  --border-on-dark: color-mix(in srgb, var(--panel-text) 18%, transparent);
  --tint: color-mix(in srgb, var(--bg-secondary) 30%, var(--bg-main));
  --shadow-sm: 0 1px 2px color-mix(in srgb, var(--graphite) 8%, transparent);
  --shadow-md: 0 18px 40px -18px color-mix(in srgb, var(--graphite) 35%, transparent);
  --shadow-lg: 0 30px 60px -24px color-mix(in srgb, var(--graphite) 45%, transparent);

  /* Type */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --container: 1120px;
  --gutter: clamp(1.25rem, 5vw, 2.5rem);
  --section-y: clamp(4.5rem, 9vw, 7.5rem);
  --header-h: 76px;
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 24px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Dark theme. The script in <head> sets the attribute before first paint.
   Only shades derived from the five brand values are used. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-main: var(--graphite);
  --text-primary: var(--warm-white);
  --text-secondary: color-mix(in srgb, var(--silver) 80%, var(--warm-white));
  --accent-primary: color-mix(in srgb, var(--emerald) 55%, var(--sage));
  --bg-secondary: color-mix(in srgb, var(--sage) 22%, var(--graphite));

  /* Panels stay graphite, lifted slightly off the page background */
  --panel-bg: color-mix(in srgb, var(--graphite) 88%, var(--warm-white));
  --panel-text: var(--warm-white);
  --panel-accent: color-mix(in srgb, var(--sage) 80%, var(--warm-white));
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.5rem, 6.2vw, 4.35rem);
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.75rem);
}

h3 {
  font-size: 1.2rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 3px solid var(--accent-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Dark sections need a ring that stays visible on graphite */
.contact :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--panel-accent);
}

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

/* Skip link ---------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 200;
  padding: 0.7rem 1.2rem;
  background: var(--text-primary);
  color: var(--bg-main);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transform: translate(-50%, -120%);
  transition: transform 180ms var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
}

/* Header ------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg-main) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 200ms var(--ease);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand__mark {
  width: 38px;
  height: auto;
}

.brand__name {
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0.8rem;
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 160ms var(--ease);
}

.site-nav a:hover {
  background: color-mix(in srgb, var(--bg-secondary) 40%, transparent);
}

.site-nav a[aria-current="page"] {
  font-weight: 600;
}

.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.15rem;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-primary);
}

/* Header buttons (theme + mobile menu) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-toggle,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-primary);
  cursor: pointer;
}

.nav-toggle {
  display: none;
  margin-right: -0.5rem;
}

.nav-toggle:hover,
.theme-toggle:hover {
  background: color-mix(in srgb, var(--bg-secondary) 40%, transparent);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Show the sun while dark, the moon while light */
.theme-toggle__icon--sun {
  display: none;
}

.theme-toggle[aria-pressed="true"] .theme-toggle__icon--sun {
  display: block;
}

.theme-toggle[aria-pressed="true"] .theme-toggle__icon--moon {
  display: none;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 200ms var(--ease), opacity 150ms linear;
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -7px;
}

.nav-toggle__bars::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero --------------------------------------------------------------------- */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(4rem, 9vw, 7rem);
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
}

.hero__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.4rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.hero__art {
  position: relative;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.hero__glow {
  position: absolute;
  inset: -12%;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 50%,
    color-mix(in srgb, var(--bg-secondary) 75%, transparent),
    transparent 68%
  );
}

.hero__art img {
  width: min(100%, 430px);
  filter: drop-shadow(0 24px 40px color-mix(in srgb, var(--graphite) 18%, transparent));
}

/* The mark is drawn in graphite, so it disappears on dark. Inverting it gives
   the same white mark as brand-mark-white.png; the drop shadow goes with it. */
:root[data-theme="dark"] .mark {
  filter: invert(1);
}

/* Shared type helpers ------------------------------------------------------ */

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.eyebrow--on-dark {
  color: var(--panel-accent);
}

.lead {
  max-width: 46ch;
  font-size: clamp(1.0625rem, 1.5vw, 1.1875rem);
  line-height: 1.65;
}

/* Buttons ------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 52px;
  padding: 0 1.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit;
  font-size: 1.1875rem; /* 19px bold: qualifies as WCAG large text */
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease),
    background-color 180ms var(--ease);
}

.btn--primary {
  background: var(--accent-primary);
  color: var(--bg-main);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

.btn--ghost:hover {
  background: color-mix(in srgb, var(--bg-secondary) 45%, transparent);
  transform: translateY(-2px);
}

.btn--ghost:active {
  transform: translateY(0);
}

/* Sections ----------------------------------------------------------------- */

.section {
  padding-block: var(--section-y);
}

section[id],
main {
  scroll-margin-top: calc(var(--header-h) + 12px);
}

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

.section__head {
  max-width: 620px;
  margin-bottom: clamp(2.25rem, 4vw, 3.25rem);
}

.section__head h2 {
  margin-top: 0.6rem;
}

/* About -------------------------------------------------------------------- */

.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.about__copy {
  display: grid;
  gap: 1.1rem;
  max-width: 56ch;
  font-size: 1.0625rem;
}

.principles {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border-strong);
}

.principles li {
  display: flex;
  gap: 1.1rem;
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--border);
}

.principles__num {
  flex: none;
  padding-top: 0.15rem;
  font-size: 1.25rem; /* 20px bold: large text, so 3:1 is enough */
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--accent-primary);
}

.principles strong {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
}

.principles span span {
  display: block;
  font-size: 0.9375rem;
}

/* Service cards ------------------------------------------------------------ */

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background: var(--bg-secondary);
  border: 1px solid color-mix(in srgb, var(--text-primary) 8%, transparent);
  border-radius: var(--radius);
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card__icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 0.35rem;
  background: var(--bg-main);
  border-radius: 50%;
  color: var(--accent-primary);
}

.card__icon svg {
  width: 22px;
  height: 22px;
}

.card p {
  font-size: 0.975rem;
  line-height: 1.65;
}

/* VisionCast --------------------------------------------------------------- */

.visioncast {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 5rem);
}

.visioncast__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
}

.visioncast__copy h2 {
  margin-top: -0.35rem;
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
}

.visioncast__note {
  max-width: 44ch;
  font-size: 0.975rem;
}

.visioncast__art {
  display: grid;
  place-items: center;
}

.app-window {
  width: min(100%, 400px);
  overflow: hidden;
  background: var(--bg-main);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.app-window__bar {
  display: flex;
  gap: 6px;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}

.app-window__bar span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-secondary);
}

.app-window__body {
  display: grid;
  justify-items: center;
  gap: 0.4rem;
  padding: clamp(2rem, 5vw, 3.25rem) 1.5rem;
  background: color-mix(in srgb, var(--bg-secondary) 26%, var(--bg-main));
}

.app-window__body img {
  width: 128px;
  margin-bottom: 0.5rem;
}

.app-window__name {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-window__status {
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Contact ------------------------------------------------------------------ */

.contact {
  background: var(--panel-bg);
  color: var(--panel-text);
}

.contact h2 {
  color: var(--panel-text);
}

.contact__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}

.contact__copy {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  max-width: 44ch;
}

.contact__copy p {
  color: color-mix(in srgb, var(--panel-text) 78%, transparent);
}

.contact__email {
  margin-top: 0.4rem;
  font-size: 1.125rem;
  font-weight: 600;
}

.contact__email a {
  color: var(--panel-accent);
  text-underline-offset: 4px;
}

.contact__form {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--panel-text);
}

.field input,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.85rem;
  background: var(--panel-text);
  color: var(--graphite);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5;
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: 3px solid var(--panel-accent);
  outline-offset: 1px;
}

.contact__form .btn {
  justify-self: start;
  margin-top: 0.25rem;
}

.field__hint,
.form-status {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--panel-text) 72%, transparent);
}

.form-status:empty {
  display: none;
}

/* Footer ------------------------------------------------------------------- */

.site-footer {
  background: var(--panel-bg);
  color: var(--panel-text);
  border-top: 1px solid var(--border-on-dark);
  padding-block: clamp(2.5rem, 5vw, 3.5rem) 2rem;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem 3rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.footer__brand img {
  width: 40px;
}

.footer__name {
  font-weight: 700;
  letter-spacing: -0.01em;
}

.footer__tagline {
  font-size: 0.875rem;
  color: color-mix(in srgb, var(--panel-text) 72%, transparent);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.35rem;
}

.footer__nav a {
  padding-block: 0.4rem;
  font-size: 0.9375rem;
  color: color-mix(in srgb, var(--panel-text) 82%, transparent);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.footer__nav a:hover {
  color: var(--panel-accent);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  font-size: 0.8125rem;
  color: color-mix(in srgb, var(--panel-text) 68%, transparent);
}

.footer__legal a {
  color: inherit;
  text-underline-offset: 3px;
}

/* Reveal on scroll --------------------------------------------------------- */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

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

.cards .card:nth-child(2) {
  transition-delay: 80ms;
}

.cards .card:nth-child(3) {
  transition-delay: 160ms;
}

/* Responsive --------------------------------------------------------------- */

@media (max-width: 960px) {
  .hero__inner,
  .about__grid,
  .visioncast,
  .contact__inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-block: clamp(2.5rem, 6vw, 4rem) var(--section-y);
  }

  .hero__art {
    order: -1;
  }

  .hero__art img {
    width: min(72%, 320px);
  }

  .hero__copy {
    gap: 1.15rem;
  }

  .about__grid {
    gap: 2.5rem;
  }

  .visioncast__art {
    order: -1;
  }

  .app-window {
    width: min(100%, 340px);
  }

  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--gutter) 1rem;
  }

  .site-nav a {
    display: block;
    padding: 0.9rem 0.25rem;
    border-radius: 0;
    font-size: 1rem;
  }

  .site-nav a[aria-current="page"]::after {
    left: 0.25rem;
    right: auto;
    width: 22px;
    bottom: 0.55rem;
  }
}

@media (max-width: 620px) {
  .cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__actions {
    width: 100%;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.75rem;
  }
}

/* Motion preferences ------------------------------------------------------- */

@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;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}