/* =================================================================
   ARSTILIA C.C. — shared stylesheet
   Loaded by every page (index, services, projects, process, about,
   career, contact). Anything true on every page — nav, footer,
   buttons, tokens — lives here so you only edit it once.
   ================================================================= */

/* ---------- DESIGN TOKENS ---------- */
:root {
  --charcoal:      #1B1E21;
  --charcoal-soft: #24282C;
  --concrete:      #EDEAE2;
  --concrete-dim:  #DFDBD0;
  --steel:         #3E5C74;
  --oxide:         #B54A2C;
  --amber:         #E8A23D;
  --ink:           #16181A;
  --paper:         #F5F3EE;

  --font-display: 'Big Shoulders Display', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  --max-width: 1280px;
  --border: 1px solid rgba(0,0,0,0.12);
  --border-dark: 1px solid rgba(255,255,255,0.14);
  --nav-height: 4.25rem;
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--concrete);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
address { font-style: normal; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--oxide);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.eyebrow::before { content: ''; width: 20px; height: 1px; background: var(--oxide); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 900;
  text-transform: uppercase;
  line-height: 0.95;
  letter-spacing: -0.01em;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.9em 1.6em;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  border: 1px solid currentColor;
  transition: background 0.2s ease, color 0.2s ease;
}
.btn-solid { background: var(--amber); color: var(--ink); border-color: var(--amber); }
.btn-solid:hover { background: var(--paper); border-color: var(--paper); }
.btn-outline-dark { color: var(--paper); }
.btn-outline-dark:hover { background: var(--paper); color: var(--ink); }
.btn-outline-light { color: var(--ink); }
.btn-outline-light:hover { background: var(--ink); color: var(--paper); }

/* ---------- SIGNATURE ELEMENT: blueprint grid ---------- */
.blueprint-bg {
  position: relative;
  background-color: var(--charcoal);
  background-image:
    linear-gradient(rgba(245,243,238,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,243,238,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}
.blueprint-bg::before {
  content: '';
  position: absolute;
  inset: var(--space-3);
  border: 1px solid rgba(245,243,238,0.18);
  pointer-events: none;
}

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding-block: var(--space-2);
  transition: background 0.25s ease, border-color 0.25s ease, padding 0.25s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(27,30,33,0.92);
  backdrop-filter: blur(6px);
  border-bottom-color: rgba(245,243,238,0.1);
  padding-block: var(--space-1);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--paper);
  display: flex;
  align-items: baseline;
  gap: 0.4em;
}
.nav-links { display: flex; gap: var(--space-4); align-items: center; }
/* :not(.btn) so the solid "Start a project" CTA is excluded from
   the dimmed/undim treatment below — a filled button should never
   look semi-transparent. It gets its own hover state instead
   (a colour swap, defined on .btn-solid:hover further down). */
.nav-links a:not(.btn) {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper);
  opacity: 0.75;
  transition: opacity 0.2s ease;
  position: relative;
}
.nav-links a:not(.btn):hover { opacity: 1; }
.nav-links a[aria-current="page"]:not(.btn) { opacity: 1; }
.nav-links a[aria-current="page"]:not(.btn)::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--oxide);
}
.nav-toggle { display: none; }

/* ---------- LANGUAGE SWITCH ---------- */
.lang-switch { display: flex; gap: 0.35rem; }
.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: rgba(245,243,238,0.55);
  padding: 0.3em 0.55em;
  border: 1px solid rgba(245,243,238,0.25);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.lang-btn:hover { color: var(--paper); border-color: rgba(245,243,238,0.5); }
.lang-btn.is-active { background: var(--paper); color: var(--ink); border-color: var(--paper); }

/* ---------- HERO (index page only) ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 6rem;
  color: var(--paper);
}
.hero .wrap { position: relative; z-index: 1; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-5);
  align-items: end;
  padding-block: var(--space-5);
}
.hero-heading { font-size: clamp(2.8rem, 7vw, 6rem); margin-top: var(--space-2); }
.hero-heading em { font-style: normal; color: var(--oxide); }
.hero-side { border-left: var(--border-dark); padding-left: var(--space-3); }
.hero-side p { color: rgba(245,243,238,0.72); max-width: 32ch; margin-bottom: var(--space-3); }
.hero-ctas { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.stat-strip { border-top: var(--border-dark); display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: var(--space-3) var(--space-2); border-right: var(--border-dark); }
.stat:last-child { border-right: none; }
.stat-number {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--paper);
  display: flex;
  align-items: baseline;
  gap: 0.15em;
}
.stat-number .unit { font-family: var(--font-mono); font-size: 1rem; color: var(--oxide); }
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(245,243,238,0.6);
  margin-top: 0.3em;
}

/* ---------- PAGE HEADER (every inner page) ----------
   A compact banner replacing the full hero on subpages, so every
   page still opens with a clear "you are here" moment. */
.page-header {
  color: var(--paper);
  padding-top: calc(var(--nav-height) + var(--space-5));
  padding-bottom: var(--space-4);
}
.page-header h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  margin-top: var(--space-2);
}
.page-header .desc { color: rgba(245,243,238,0.68); max-width: 52ch; margin-top: var(--space-2); }

/* ---------- SECTION SCAFFOLDING ---------- */
section { padding-block: var(--space-6); }
section:first-of-type { padding-top: var(--space-6); }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(2rem, 4.5vw, 3.4rem); }
.section-head .desc { max-width: 38ch; color: #55524B; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- SERVICES ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--concrete-dim);
  border: 1px solid var(--concrete-dim);
}
.service-card {
  background: var(--concrete);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: background 0.25s ease;
  scroll-margin-top: calc(var(--nav-height) + var(--space-2));
}
.service-card:hover { background: var(--paper); }
.service-icon { color: var(--oxide); width: 42px; height: 42px; object-fit: contain; }
.service-card h3 { font-size: 1.3rem; text-transform: none; font-weight: 700; letter-spacing: 0; }
.service-card p { color: #55524B; font-size: 0.92rem; }

/* ---------- PROJECTS ---------- */
.projects-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: var(--border);
}
.filter-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.5em 0.9em;
  border: 1px solid var(--concrete-dim);
  color: #55524B;
  background: var(--paper);
  transition: all 0.15s ease;
}
.filter-btn:hover { border-color: var(--oxide); color: var(--oxide); }
.filter-btn.is-active { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.projects-count { font-family: var(--font-mono); font-size: 0.78rem; color: #7A776D; }

.project-row {
  display: grid;
  grid-template-columns: 90px 1fr auto auto;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-2);
  border-top: var(--border);
  cursor: default;
  transition: background 0.15s ease;
}
.projects-list .project-row:last-child { border-bottom: var(--border); }
.project-row:hover { background: rgba(181,74,44,0.05); }
.sheet-no { font-family: var(--font-mono); font-size: 0.78rem; color: var(--oxide); }
.project-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.1rem,2.2vw,1.6rem); text-transform: uppercase; }
.project-meta { font-family: var(--font-mono); font-size: 0.75rem; color: #7A776D; text-align: right; }
.project-icon {
  width: 36px; height: 36px; object-fit: contain;
  opacity: 0; transform: translateX(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.project-row:hover .project-icon { opacity: 1; transform: translateX(0); }
.projects-empty { padding-block: var(--space-4); color: #7A776D; font-family: var(--font-mono); font-size: 0.85rem; display: none; }
.projects-empty.is-visible { display: block; }

/* ---------- PROCESS ---------- */
.process { color: var(--paper); }
.process-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-2); counter-reset: step; }
.process-step { border-top: 2px solid var(--oxide); padding-top: var(--space-2); counter-increment: step; }
.process-step .step-no { font-family: var(--font-mono); font-size: 0.8rem; color: var(--oxide); }
.process-step .step-no::before { content: counter(step, decimal-leading-zero) ' — '; }
.process-step h3 { font-size: 1.2rem; margin-block: 0.4em 0.3em; text-transform: none; font-weight: 700; }
.process-step p { font-size: 0.86rem; color: rgba(245,243,238,0.65); }

/* ---------- ABOUT / FOUNDERS ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: center; }
.about-copy p { color: #55524B; margin-bottom: var(--space-2); max-width: 52ch; }
.about-copy p:last-child { margin-bottom: 0; }
.about-fig { border: var(--border); padding: var(--space-2); background: var(--paper); }
.about-photo { position: relative; overflow: hidden; }
.about-photo img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(55%) contrast(1.05) sepia(0.12) saturate(1.3);
}
.about-photo .photo-tag {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: var(--charcoal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35em 0.6em;
}

.founders-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.founder-card {
  background: var(--paper);
  border: var(--border);
  padding: var(--space-3);
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}
.founder-avatar {
  width: 56px; height: 56px; flex: none;
  background: var(--charcoal);
  color: var(--oxide);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 900; font-size: 1.2rem;
}
.founder-name { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; text-transform: uppercase; }
.founder-role { font-family: var(--font-mono); font-size: 0.72rem; color: var(--oxide); text-transform: uppercase; letter-spacing: 0.05em; margin-block: 0.2em 0.5em; }
.founder-card p { color: #55524B; font-size: 0.88rem; }

/* ---------- CAREER ---------- */
.perks-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--concrete-dim); border: 1px solid var(--concrete-dim); margin-bottom: var(--space-5); }
.perk-card { background: var(--concrete); padding: var(--space-3); }
.perk-card h3 { font-size: 1.05rem; text-transform: none; font-weight: 700; margin-bottom: 0.4em; }
.perk-card p { color: #55524B; font-size: 0.88rem; }

.job-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-top: var(--border);
}
.jobs-list .job-row:last-child { border-bottom: var(--border); }
.job-title { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; text-transform: uppercase; }
.job-tag { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; color: #7A776D; }
.job-apply { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; color: var(--oxide); border-bottom: 1px solid var(--oxide); }

/* ---------- APPLY (job application page) ---------- */
.apply-wrap { max-width: 620px; }
.apply-meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--oxide);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: var(--border);
}
.apply-meta strong { color: var(--ink); }

/* ---------- CONTACT ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--space-5); }
.contact-info dl { display: grid; grid-template-columns: auto 1fr; gap: var(--space-1) var(--space-3); font-family: var(--font-mono); font-size: 0.85rem; }
.contact-info dt { color: var(--oxide); }
.contact-info dd { color: #55524B; }

.field { margin-bottom: var(--space-3); }
.field label { display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 0.5em; color: #55524B; }
.field input, .field select, .field textarea { width: 100%; font: inherit; padding: 0.8em 0.9em; background: var(--paper); border: var(--border); color: var(--ink); }
.field textarea { resize: vertical; min-height: 100px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.form-note { font-size: 0.78rem; color: #7A776D; margin-top: var(--space-2); }
.form-note.success { color: #3E7A4A; }

/* ---------- FOOTER ---------- */
footer.blueprint-bg { color: var(--paper); padding-top: var(--space-5); }
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
}
.footer-brand .logo { margin-bottom: var(--space-2); }
.footer-desc { font-size: 0.85rem; color: rgba(245,243,238,0.6); max-width: 30ch; }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--oxide);
  margin-bottom: var(--space-2);
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.55em; }
.footer-col a, .footer-col li {
  font-size: 0.85rem;
  color: rgba(245,243,238,0.75);
}
.footer-col a:hover { color: var(--paper); }
.footer-col address { font-size: 0.85rem; color: rgba(245,243,238,0.75); line-height: 1.7; }
.footer-col address a:hover { color: var(--paper); }

.footer-social {
  display: flex;
  gap: var(--space-2);
  padding-block: var(--space-3);
  border-top: var(--border-dark);
}
.social-icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(245,243,238,0.25);
  color: var(--paper);
  transition: background 0.2s ease, border-color 0.2s ease;
}
.social-icon:hover { background: var(--oxide); border-color: var(--oxide); }
.social-icon svg { width: 16px; height: 16px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-block: var(--space-3);
  border-top: var(--border-dark);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(245,243,238,0.55);
}
.footer-bottom a:hover { color: var(--paper); }

/* ---------- SERVICE DETAIL PAGES ---------- */
.service-detail-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: var(--space-5); align-items: start; }
.service-detail-grid h2 { font-size: 1.5rem; margin-bottom: var(--space-2); }
.service-detail-grid .about-copy p { margin-bottom: var(--space-2); }
.value-list { display: flex; flex-direction: column; gap: var(--space-2); background: var(--paper); border: var(--border); padding: var(--space-3); }
.value-item { display: flex; gap: 0.75em; align-items: flex-start; font-size: 0.92rem; color: #3A3833; }
.value-item::before { content: '—'; color: var(--oxide); flex: none; font-family: var(--font-mono); }

/* ---------- PRIVACY POLICY ---------- */
.policy-updated { font-family: var(--font-mono); font-size: 0.78rem; color: #7A776D; margin-top: var(--space-1); }
.policy-body { max-width: 68ch; }
.policy-section { margin-bottom: var(--space-4); }
.policy-section h2 { font-size: 1.3rem; text-transform: none; letter-spacing: 0; margin-bottom: 0.6em; }
.policy-section p { color: #3A3833; margin-bottom: 0.8em; }
.policy-section ul { display: flex; flex-direction: column; gap: 0.5em; margin-top: 0.6em; }
.policy-section li { color: #3A3833; padding-left: 1.2em; position: relative; }
.policy-section li::before { content: '—'; position: absolute; left: 0; color: var(--oxide); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .hero-side { border-left: none; border-top: var(--border-dark); padding-left: 0; padding-top: var(--space-2); }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .service-detail-grid { grid-template-columns: 1fr; }
  .founders-grid { grid-template-columns: 1fr; }
  .perks-grid { grid-template-columns: 1fr; }
  .project-row { grid-template-columns: 50px 1fr auto; }
  .project-icon { display: none; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .job-row { grid-template-columns: 1fr; align-items: flex-start; gap: 0.4rem; }
}

@media (max-width: 640px) {
  .nav-links { position: fixed; inset: 0 0 0 30%; background: var(--charcoal); flex-direction: column; justify-content: center; align-items: flex-start; padding: var(--space-4); transform: translateX(100%); transition: transform 0.3s ease; }
  .nav-links.is-open { transform: translateX(0); }
  .nav-toggle { display: block; color: var(--paper); font-family: var(--font-mono); font-size: 0.8rem; text-transform: uppercase; z-index: 110; }
  .services-grid, .process-list { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .project-row { grid-template-columns: 40px 1fr; }
  .project-meta { display: none; }
  .footer-main { grid-template-columns: 1fr; }
}