/* ============ RESET & BASE ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--fs-200);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }

:root {
  --color-bg: #F5F6F3;
  --color-surface: #FFFFFF;
  --color-ink: #15191C;
  --color-ink-soft: #4B5560;
  --color-rule: #D9DCD5;
  --color-teal: #1F6F63;
  --color-teal-soft: #E4EEEC;
  --color-amber: #A9672E;
  --color-navy: #1B2B33;

  --font-display: 'Archivo', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --fs-100: 0.8125rem;
  --fs-200: 1rem;
  --fs-300: 1.125rem;
  --fs-400: 1.375rem;
  --fs-500: 1.75rem;
  --fs-700: clamp(2rem, 1.5rem + 2vw, 2.75rem);
  --fs-900: clamp(2.5rem, 1.8rem + 3.5vw, 4.25rem);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  --max-width: 1120px;
  --radius-sm: 3px;
}

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}

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

/* ============ HEADER / NAV ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-rule);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  font-weight: 600;
  font-size: var(--fs-300);
  letter-spacing: -0.01em;
}
.brand-dot { color: var(--color-teal); }

.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--fs-100);
}
.primary-nav a { color: var(--color-ink-soft); transition: color .15s ease; }
.primary-nav a:hover { color: var(--color-ink); }
.nav-cta {
  color: var(--color-ink) !important;
  border: 1px solid var(--color-ink);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
}
.nav-cta:hover { background: var(--color-ink); color: var(--color-bg) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle-bar {
  width: 20px; height: 2px;
  background: var(--color-ink);
}

/* ============ HERO ============ */
.hero { padding-block: var(--space-6) var(--space-5); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: center;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--color-teal);
  margin-bottom: var(--space-2);
}
.hero-copy h1 {
  font-size: var(--fs-900);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  max-width: 15ch;
}
.hero-lead {
  margin-top: var(--space-3);
  max-width: 46ch;
  font-size: var(--fs-300);
  color: var(--color-ink-soft);
}
.hero-actions {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-100);
  font-weight: 500;
  border: 1px solid transparent;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--color-ink); color: var(--color-bg); }
.btn-primary:hover { background: var(--color-teal); }
.btn-ghost { border-color: var(--color-ink); color: var(--color-ink); }
.btn-ghost:hover { background: var(--color-ink); color: var(--color-bg); }

.pipeline-svg { width: 100%; height: auto; }
.pipeline-nodes circle { fill: var(--color-bg); stroke: var(--color-teal); stroke-width: 2; }
.pipeline-nodes .node-end { fill: var(--color-teal); }
.pipeline-labels text { fill: var(--color-ink-soft); }

#pipelinePath {
  stroke-dasharray: 700;
  stroke-dashoffset: 700;
  animation: draw-pipeline 1.6s ease forwards .2s;
}
@keyframes draw-pipeline { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) {
  #pipelinePath { animation: none; stroke-dashoffset: 0; }
}

/* ============ SECTION HEAD (shared) ============ */
.section-head {
  max-width: 56ch;
  margin-bottom: var(--space-4);
}
.section-head h2 {
  font-size: var(--fs-700);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-head p {
  margin-top: var(--space-2);
  color: var(--color-ink-soft);
  font-size: var(--fs-300);
}

/* ============ SERVICES ============ */
.services { padding-block: var(--space-6); border-top: 1px solid var(--color-rule); }
.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--color-rule);
}
.service-list li {
  padding: var(--space-4) var(--space-3) var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-rule);
  border-right: 1px solid var(--color-rule);
}
.service-list li:nth-child(even) { border-right: none; }
.service-list h3 {
  font-size: var(--fs-400);
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.service-list p { color: var(--color-ink-soft); max-width: 42ch; }

/* ============ CASE STUDIES ============ */
.work { padding-block: var(--space-6); border-top: 1px solid var(--color-rule); }
.case-list { border-top: 1px solid var(--color-rule); }
.case-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-rule);
}
.case-status {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  height: fit-content;
  white-space: nowrap;
}
.status-shipped { background: var(--color-teal-soft); color: var(--color-teal); }
.status-active  { background: #FDEFE1; color: var(--color-amber); }
.status-progress{ background: #EDEEEA; color: var(--color-ink-soft); }
.status-internal{ background: #EDEEEA; color: var(--color-ink-soft); }

.case-body h3 { font-size: var(--fs-400); font-weight: 600; margin-bottom: var(--space-1); }
.case-body p { color: var(--color-ink-soft); max-width: 68ch; }
.case-tags { margin-top: var(--space-2); display: flex; flex-wrap: wrap; gap: 0.5rem; }
.case-tags span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-soft);
  border: 1px solid var(--color-rule);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* ============ BACKGROUND ============ */
.background { padding-block: var(--space-6); border-top: 1px solid var(--color-rule); }
.background-list { border-top: 1px solid var(--color-rule); }
.background-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-rule);
}
.background-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--color-ink-soft);
  border: 1px solid var(--color-rule);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  height: fit-content;
  width: fit-content;
  white-space: nowrap;
}
.background-body h3 { font-size: var(--fs-400); font-weight: 600; margin-bottom: var(--space-1); }
.background-body p { color: var(--color-ink-soft); max-width: 68ch; }

/* ============ PROCESS ============ */
.process { padding-block: var(--space-6); border-top: 1px solid var(--color-rule); }
.process-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4) var(--space-5);
}
.process-list li { display: flex; gap: var(--space-2); }
.process-index {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--color-teal);
  padding-top: 0.2rem;
}
.process-list h3 { font-size: var(--fs-400); font-weight: 600; margin-bottom: var(--space-1); }
.process-list p { color: var(--color-ink-soft); max-width: 42ch; }

/* ============ CONTACT ============ */
.contact {
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-rule);
  background: var(--color-navy);
  color: var(--color-bg);
}
.contact-inner { max-width: 60ch; }
.contact h2 { font-size: var(--fs-700); font-weight: 700; margin-bottom: var(--space-2); }
.contact p { color: #B9C4C9; margin-bottom: var(--space-3); font-size: var(--fs-300); }
.contact .btn-primary { background: var(--color-teal); color: var(--color-bg); }
.contact .btn-primary:hover { background: #268576; }

/* ============ FOOTER ============ */
.site-footer { padding-block: var(--space-3); border-top: 1px solid var(--color-rule); }
.footer-inner {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-100);
  color: var(--color-ink-soft);
  flex-wrap: wrap;
  gap: var(--space-1);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-diagram { order: -1; }
  .service-list { grid-template-columns: 1fr; }
  .service-list li:nth-child(even) { border-right: 1px solid var(--color-rule); }
  .process-list { grid-template-columns: 1fr; }
  .case-row { grid-template-columns: 1fr; }
  .background-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .primary-nav {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-rule);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
  }
  .primary-nav.is-open { display: flex; }
  .nav-toggle { display: flex; }
}