/* JSTBuild — design tokens: black & white, minimalist */
:root {
  --color-primary: #000000;
  --color-primary-hover: #262626;
  --color-on-primary: #ffffff;
  --color-secondary: #000000;
  --color-accent: #000000;
  --color-accent-hover: #262626;
  --color-on-accent: #ffffff;
  --color-background: #ffffff;
  --color-foreground: #0a0a0a;
  --color-card: #ffffff;
  --color-card-foreground: #0a0a0a;
  --color-muted: #f4f4f5;
  --color-muted-foreground: #52525b;
  --color-border: #e4e4e7;
  --color-destructive: #b91c1c;
  --color-ring: #000000;

  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --radius-sm: 0;
  --radius-md: 0;
  --radius-lg: 0;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04);
  --container-max: 1180px;

  --duration-fast: 150ms;
  --duration-base: 250ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100dvh;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-foreground);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  margin: 0 0 var(--space-3);
}

h1 { font-size: clamp(2.2rem, 4vw + 1rem, 3.5rem); }
h2 { font-size: clamp(1.6rem, 2vw + 1rem, 2.25rem); }
h3 { font-size: 1.25rem; }

.display-heading {
  font-size: clamp(2.2rem, 4vw + 1rem, 3.5rem);
}

p {
  margin: 0 0 var(--space-3);
  color: var(--color-muted-foreground);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -48px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--duration-fast) var(--ease-standard);
}

.skip-link:focus {
  top: var(--space-3);
}

/* Focus visibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

/* On the homepage the header stays hidden over the full-bleed intro,
   then fades in once the visitor scrolls past it (see js/main.js). */
.has-intro .site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  visibility: hidden;
  opacity: 0;
  background: transparent;
  border-bottom-color: transparent;
  transition: opacity var(--duration-base) var(--ease-standard),
    background-color var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
}

.has-intro .site-header.header-visible {
  visibility: visible;
  opacity: 1;
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--color-border);
}

/* Full-bleed intro splash. The track is taller than the viewport so the
   sticky section inside it stays pinned on screen while the user scrolls
   through it, then releases naturally once the track ends. */
.intro-pin-track {
  height: 200vh;
  position: relative;
}

.intro {
  height: 100dvh;
  position: sticky;
  top: 0;
  background: #000000;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4);
}

.intro-title {
  color: #ffffff;
  font-size: clamp(3rem, 11vw, 7.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0;
}

/* Gradient fill is applied per-letter via inline styles in js/main.js —
   background-clip:text on a transformed inline-block child needs its own
   background box, an ancestor's clip doesn't reliably cover it. */
.intro-letter.gradient-ready {
  background-repeat: no-repeat;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.intro-letter {
  display: inline-block;
  opacity: 0;
  transform: translateY(28px);
  animation: intro-letter-in 0.6s var(--ease-standard) forwards;
}

@keyframes intro-letter-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.intro-scroll {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  padding: var(--space-2);
  opacity: 0;
  animation: intro-scroll-in 0.6s var(--ease-standard) forwards;
  animation-delay: 750ms;
  transition: color var(--duration-fast) var(--ease-standard);
}

@keyframes intro-scroll-in {
  to {
    opacity: 1;
  }
}

.intro-scroll:hover {
  color: #ffffff;
}

.intro-scroll:focus-visible {
  outline-color: #ffffff;
}

.intro-scroll svg {
  width: 20px;
  height: 20px;
  animation: intro-bounce 1.8s ease-in-out infinite;
}

@keyframes intro-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--color-foreground);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a:not(.btn) {
  text-decoration: none;
  color: var(--color-muted-foreground);
  font-weight: 500;
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);
}

.nav-links a:not(.btn):hover,
.nav-links a:not(.btn)[aria-current="page"] {
  color: var(--color-foreground);
  border-color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 0;
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--color-foreground);
  transition: border-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform var(--duration-base) var(--ease-standard), opacity var(--duration-fast) var(--ease-standard);
}

.nav-toggle.active .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  min-height: 44px;
  border-radius: 0;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-foreground);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* For use on dark/black section backgrounds (e.g. the CTA band) */
.btn-invert {
  background: #ffffff;
  color: #000000;
}

.btn-invert:hover {
  background: #e4e4e7;
}

.btn-outline-invert {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: #ffffff;
}

.btn-outline-invert:hover {
  border-color: #ffffff;
}

/* Hero */
.hero {
  padding: var(--space-8) 0 var(--space-7);
}

.hero-inner {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-muted);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 0;
  margin-bottom: var(--space-4);
}

.hero p.lead {
  font-size: 1.15rem;
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
}

.hero-card-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-card-row:last-child {
  border-bottom: none;
}

.hero-card-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--color-muted);
  color: var(--color-primary);
  display: grid;
  place-items: center;
}

.hero-card-icon svg {
  width: 20px;
  height: 20px;
}

/* Sections */
section {
  padding: var(--space-7) 0;
}

.section-head {
  max-width: 60ch;
  margin-bottom: var(--space-6);
}

.section-head .eyebrow {
  margin-bottom: var(--space-3);
}

/* Feature / service grid */
.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-muted);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-3);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card h3 {
  margin-bottom: var(--space-2);
}

.card p {
  margin-bottom: 0;
}

.team-avatar {
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-3);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.team-card h3 {
  margin-bottom: 2px;
}

.team-email {
  margin-top: var(--space-4);
  padding: 10px 18px;
  font-size: 0.9rem;
}

/* Process steps */
.steps {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  counter-reset: step;
}

.step {
  position: relative;
  padding-top: var(--space-6);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  border-radius: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: grid;
  place-items: center;
  font-weight: 700;
}

/* CTA band */
.cta-band {
  background: var(--color-foreground);
  color: #f8fafc;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}

.cta-band h2 {
  color: #ffffff;
}

.cta-band p {
  color: #cbd5e1;
  max-width: 55ch;
  margin-inline: auto;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* About page */
.about-hero {
  padding: var(--space-7) 0 var(--space-6);
}

.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.value-list li {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.value-list .check {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 0;
  background: var(--color-muted);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  margin-top: 2px;
}

.value-list .check svg {
  width: 14px;
  height: 14px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag {
  background: var(--color-muted);
  color: var(--color-foreground);
  border: 1px solid var(--color-border);
  border-radius: 0;
  padding: 6px 14px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Contact page */
.contact-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start;
}

.contact-info-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.contact-info-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.contact-info-list a {
  text-decoration: none;
  font-weight: 600;
  color: var(--color-foreground);
}

.contact-info-list a:hover {
  color: var(--color-primary);
}

form.card {
  display: grid;
  gap: var(--space-4);
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label {
  font-weight: 600;
  font-size: 0.95rem;
}

.field .hint {
  font-size: 0.85rem;
  color: var(--color-muted-foreground);
  margin: 0;
}

.field input,
.field textarea {
  font: inherit;
  padding: 12px 14px;
  min-height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-background);
  color: var(--color-foreground);
}

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

.field-error {
  color: var(--color-destructive);
  font-size: 0.85rem;
  margin: 0;
  display: none;
}

.field.invalid input,
.field.invalid textarea {
  border-color: var(--color-destructive);
}

.field.invalid .field-error {
  display: block;
}

.form-status {
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-weight: 600;
  display: none;
}

.form-status.visible {
  display: block;
}

.form-status.success {
  background: #dcfce7;
  color: #166534;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0;
  margin-top: var(--space-7);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.footer-inner p {
  margin: 0;
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  text-decoration: none;
  color: var(--color-muted-foreground);
  font-size: 0.9rem;
}

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

/* Responsive */
@media (min-width: 768px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

@media (max-width: 767px) {
  .nav-links {
    position: fixed;
    inset: 0;
    z-index: 90;
    background: #000000;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    margin: 0;
    padding: 0 var(--space-5);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-base) var(--ease-standard);
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  }

  .nav-links li:first-child {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
  }

  .nav-links a:not(.btn) {
    display: block;
    padding: var(--space-4) 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    border-bottom: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--duration-base) var(--ease-standard), transform var(--duration-base) var(--ease-standard);
  }

  .nav-links.open a:not(.btn) {
    opacity: 1;
    transform: translateY(0);
  }

  .nav-links a:not(.btn):hover {
    background: transparent;
    color: rgba(255, 255, 255, 0.6);
  }

  .nav-links a:not(.btn)[aria-current="page"] {
    color: #ffffff;
    text-decoration: underline;
    text-underline-offset: 6px;
  }

  .nav-links li:nth-child(2) a {
    transition-delay: 60ms;
  }

  .nav-links li:last-child {
    border-bottom: none;
    margin-top: var(--space-5);
  }

  .nav-links .btn {
    width: 100%;
    background: #ffffff;
    color: #000000;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--duration-base) var(--ease-standard), transform var(--duration-base) var(--ease-standard);
    transition-delay: 120ms;
  }

  .nav-links.open .btn {
    opacity: 1;
    transform: translateY(0);
  }

  .nav-links .btn:hover {
    background: #e4e4e7;
  }

  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 100;
  }

  .site-header.nav-open,
  .has-intro .site-header.nav-open {
    background: #000000;
    border-bottom-color: transparent;
    /* backdrop-filter establishes a containing block for fixed descendants,
       which would trap the full-screen nav overlay inside the header's own
       box instead of the viewport — drop it while the menu is open. */
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .site-header.nav-open .brand {
    color: #ffffff;
  }

  .site-header.nav-open .nav-toggle {
    border-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Scroll-triggered reveal (progressive enhancement — see js/main.js).
   Content stays fully visible if JS never runs; .js gates the hidden start state
   so there's no flash of invisible content. */
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-standard), transform 0.7s var(--ease-standard);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js .grid .reveal:nth-child(2) {
  transition-delay: 90ms;
}

.js .grid .reveal:nth-child(3) {
  transition-delay: 180ms;
}