/* ==========================================================================
   Caliber Works — design tokens
   ========================================================================== */
:root {
  /* color */
  --color-paper: #EEF1F6;
  --color-paper-alt: #E2E7F0;
  --color-ink: #0A1628;
  --color-ink-soft: #16223B;
  --color-brand: #0057CE;
  --color-brand-deep: #074198;
  --color-steel: #4E5A6B;
  --color-steel-200: #C7CFDB;
  --color-brass: #A8762E;
  --color-onink-muted: #A9B4C8;
  --color-white: #FFFFFF;

  /* type */
  --font-display: 'Archivo', 'Arial Black', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;

  --fs-hero: clamp(2.5rem, 1.9rem + 2.8vw, 4.25rem);
  --fs-h2: clamp(1.875rem, 1.55rem + 1.5vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 1.15rem + 0.4vw, 1.5rem);
  --fs-lg: 1.125rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-mono: 0.8125rem;

  /* spacing (8px rhythm) */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 3.25rem;
  --space-8: 4.5rem;
  --space-9: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;

  --max-width: 1200px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
}

@media (prefers-reduced-motion: reduce) {
  :root { --dur-fast: 0ms; --dur-base: 0ms; }
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

@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;
  }
}

.sr-only {
  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; left: 1rem; top: -3rem;
  background: var(--color-ink); color: var(--color-white);
  padding: 0.75rem 1.25rem; border-radius: var(--radius-sm);
  z-index: 1000; transition: top var(--dur-base) var(--ease-out);
  font-family: var(--font-mono); font-size: var(--fs-small);
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 2.5px solid var(--color-brand);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 640px) {
  .wrap { padding-inline: var(--space-6); }
}

/* ==========================================================================
   Typography helpers
   ========================================================================== */
h1, h2, h3 { font-family: var(--font-display); font-weight: 800; line-height: 1.08; letter-spacing: -0.01em; }
.mono-small { font-family: var(--font-mono); font-size: var(--fs-mono); letter-spacing: 0.02em; color: var(--color-steel); }

/* signature "spec-tag": dimension-leader-line label used throughout */
.spec-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-steel);
}
.spec-tag::before {
  content: '';
  width: 1.5rem;
  height: 1px;
  background: var(--color-brand);
  flex-shrink: 0;
}
.spec-tag-onink { color: var(--color-onink-muted); }
.spec-tag-onink::before { background: var(--color-brand); }

.eyebrow { margin-bottom: var(--space-3); }
.section-eyebrow { margin-bottom: var(--space-2); }

.section-title {
  font-size: var(--fs-h2);
  max-width: 34ch;
  margin-bottom: var(--space-6);
}
.section-title-onink { color: var(--color-white); }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

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

.btn-outline {
  border-color: var(--color-ink);
  color: var(--color-ink);
}
.btn-outline:hover { background: var(--color-ink); color: var(--color-white); }

.btn-outline-onink {
  border-color: var(--color-onink-muted);
  color: var(--color-white);
}
.btn-outline-onink:hover { background: var(--color-white); color: var(--color-ink); border-color: var(--color-white); }

.btn-ghost {
  color: var(--color-ink);
  border-color: var(--color-steel-200);
}
.btn-ghost:hover { border-color: var(--color-ink); }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(238, 241, 246, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-steel-200);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
  gap: var(--space-4);
}
.brand-logo { height: 44px; width: auto; }

.site-nav ul {
  display: flex;
  gap: var(--space-5);
  font-size: var(--fs-small);
  font-weight: 500;
}
.site-nav a { text-decoration: none; }
.site-nav a:hover { color: var(--color-brand); }

.site-nav, .header-cta { display: none; }

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}
.nav-toggle-bar, .nav-toggle-bar::before, .nav-toggle-bar::after {
  content: '';
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}
.nav-toggle-bar::before { transform: translateY(-6px); }
.nav-toggle-bar::after { transform: translateY(4px); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(0) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateY(-2px) rotate(-45deg); }

.mobile-nav {
  border-top: 1px solid var(--color-steel-200);
  padding: var(--space-4);
}
.mobile-nav ul { display: flex; flex-direction: column; gap: var(--space-3); }
.mobile-nav a { text-decoration: none; font-size: var(--fs-lg); font-weight: 500; }

@media (min-width: 900px) {
  .site-nav, .header-cta { display: block; }
  .nav-toggle, .mobile-nav { display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-block: var(--space-8) var(--space-7); }
.hero-grid {
  display: grid;
  gap: var(--space-7);
  align-items: center;
}
.hero-title {
  font-size: var(--fs-hero);
  max-width: 16ch;
  margin-bottom: var(--space-4);
}
.hero-sub {
  font-size: var(--fs-lg);
  color: var(--color-steel);
  max-width: 42ch;
  margin-bottom: var(--space-5);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-6); }

.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.chip {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.04em;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--color-steel-200);
  border-radius: var(--radius-sm);
  color: var(--color-steel);
}

.hero-figure {
  position: relative;
  min-height: 220px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-steel-200);
  background: linear-gradient(135deg, var(--color-paper-alt), var(--color-steel-200));
}
.hero-figure::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.4);
  pointer-events: none;
  z-index: 1;
}
.hero-video {
  display: block;
  width: 100%;
  height: auto;
}

@media (min-width: 860px) {
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; align-items: stretch; }
  .hero-figure { height: 100%; }
  .hero-video { height: 100%; object-fit: cover; }
}

/* ==========================================================================
   Sections (generic)
   ========================================================================== */
.section { padding-block: var(--space-8); scroll-margin-top: 5rem; }
.section-alt { background: var(--color-paper-alt); }
.section-ink {
  background:
    linear-gradient(rgba(10, 22, 40, 0.9), rgba(10, 22, 40, 0.94)),
    url('../src/assets/img/energy-band.webp') center / cover no-repeat;
  color: var(--color-white);
}

/* ==========================================================================
   What I do — pillars
   ========================================================================== */
.pillars {
  display: grid;
  gap: var(--space-6);
}
.pillar { position: relative; padding-left: 3.5rem; }
.pillar-num {
  position: absolute;
  left: 0;
  top: 0.15em;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-brand);
}
.pillar-num::before { content: attr(data-num); }
.pillar-num::after {
  content: '';
  display: block;
  width: 1.75rem;
  height: 1px;
  background: var(--color-steel-200);
  margin-top: 0.6rem;
}
.pillar h3 { font-size: var(--fs-h3); margin-bottom: var(--space-2); }
.pillar p { color: var(--color-steel); max-width: 40ch; }

@media (min-width: 780px) {
  .pillars { grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
}

/* ==========================================================================
   Services
   ========================================================================== */
.service-grid {
  display: grid;
  gap: var(--space-4);
}
.service-card {
  background: var(--color-paper);
  border: 1px solid var(--color-steel-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--dur-base) var(--ease-out);
}
.service-card:hover { border-color: var(--color-brand); }
.service-card-body { padding: var(--space-5); }
.service-card-figure {
  width: 100%;
  height: 9rem;
  object-fit: cover;
  filter: grayscale(0.5) contrast(1.05);
}
.service-num { margin-bottom: var(--space-2); }
.service-card h3 { font-size: var(--fs-h3); margin-bottom: var(--space-3); }

.service-details summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-brand-deep);
  font-weight: 500;
  padding: 0.4rem 0;
  list-style: none;
}
.service-details summary::-webkit-details-marker { display: none; }
.service-details summary::after {
  content: '+';
  display: inline-block;
  margin-left: 0.5rem;
  transition: transform var(--dur-base) var(--ease-out);
}
.service-details[open] summary::after { transform: rotate(45deg); }

.service-details ul { margin-top: var(--space-3); display: grid; gap: 0.6rem; }
.service-details li {
  padding-left: 1.1rem;
  position: relative;
  font-size: var(--fs-small);
  color: var(--color-steel);
}
.service-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 1px;
  background: var(--color-brand);
}
.service-note { margin-top: var(--space-3); }

@media (min-width: 780px) {
  .service-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ==========================================================================
   How I work — process
   ========================================================================== */
.process {
  display: grid;
  gap: var(--space-5);
  counter-reset: step;
}
.process-step { position: relative; padding-top: var(--space-4); border-top: 1px solid var(--color-steel-200); }
.process-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  padding: 0.3rem 0.6rem;
  border-left: 1.5px solid var(--color-brand);
  border-right: 1.5px solid var(--color-brand);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-brand);
  margin-bottom: var(--space-2);
}
.process-num::before { content: attr(data-num); }
.process-step h3 { font-size: var(--fs-h3); margin-bottom: var(--space-2); }
.process-step p { color: var(--color-steel); max-width: 32ch; }

@media (min-width: 780px) {
  .process { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Standards
   ========================================================================== */
.principles {
  display: grid;
  gap: var(--space-5);
  margin-bottom: var(--space-7);
}
.principle { padding-top: var(--space-3); border-top: 1px solid var(--color-ink-soft); }
.principle h3 {
  font-size: 1.125rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}
.principle p { color: var(--color-onink-muted); font-size: var(--fs-small); max-width: 34ch; }

@media (min-width: 700px) {
  .principles { grid-template-columns: repeat(2, 1fr); gap: var(--space-6) var(--space-5); }
}
@media (min-width: 1040px) {
  .principles { grid-template-columns: repeat(4, 1fr); }
}

.standards-grid { display: grid; gap: var(--space-6); align-items: start; }
.spec-sheet { display: grid; gap: 0; border-top: 1px solid var(--color-ink-soft); }
.standards-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-ink-soft);
}
.standards-figure img { width: 100%; height: auto; display: block; filter: grayscale(0.3) contrast(1.05); }

@media (min-width: 780px) {
  .standards-grid { grid-template-columns: 1.2fr 1fr; }
}
.spec-row {
  display: grid;
  gap: 0.3rem;
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-ink-soft);
}
.spec-row dt {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-onink-muted);
}
.spec-row dd { color: var(--color-white); font-size: var(--fs-small); line-height: 1.65; }

.standards-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.3rem; }
.standards-chips li {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--color-ink-soft);
  border-radius: var(--radius-sm);
  color: var(--color-white);
}

/* ==========================================================================
   Final CTA band
   ========================================================================== */
.cta-band {
  background: var(--color-brand-deep);
  color: var(--color-white);
  padding-block: var(--space-8);
}
.cta-band-inner { max-width: 46rem; }
.cta-band h2 {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-3);
}
.cta-band p {
  color: var(--color-onink-muted);
  font-size: var(--fs-lg);
  margin-bottom: var(--space-5);
  max-width: 42ch;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-ink);
  color: var(--color-onink-muted);
  padding-block: var(--space-7);
}
.footer-inner {
  display: grid;
  gap: var(--space-6);
}
.footer-brand .brand-logo { height: 40px; margin-bottom: var(--space-2); }
.footer-nav ul { display: flex; flex-wrap: wrap; gap: var(--space-4); font-size: var(--fs-small); }
.footer-nav a { text-decoration: none; }
.footer-nav a:hover { color: var(--color-white); }
.footer-legal { padding-top: var(--space-5); border-top: 1px solid var(--color-ink-soft); }

@media (min-width: 780px) {
  .footer-inner { grid-template-columns: 1fr auto; }
  .footer-legal { grid-column: 1 / -1; }
}

/* ==========================================================================
   Scroll-reveal (progressive enhancement, respects reduced motion via JS)
   ========================================================================== */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }