/* ============================================================
   Pilot Aluminium — Design tokens
   Palette: porcelain / ink / metal / navy / aqua / graphite
   Type: Space Grotesk (display) · IBM Plex Sans (body) · IBM Plex Mono (data)
   ============================================================ */

:root {
  --porcelain: #f6f4f0;
  --porcelain-dim: #ece8e1;
  --ink: #1b1d1f;
  --ink-soft: #4a4e53;
  --metal: #8b929a;
  --metal-line: #d7d9db;
  --navy: #16324f;
  --navy-deep: #0e2338;
  --aqua: #bfe6e2;
  --aqua-deep: #7fb8b2;
  --graphite: #101317;
  --graphite-line: #262b31;

  --display: "Space Grotesk", "Arial Narrow", sans-serif;
  --body: "IBM Plex Sans", -apple-system, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", monospace;

  --step-0: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --step-1: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-2: clamp(1.75rem, 1.5rem + 1.2vw, 2.5rem);
  --step-3: clamp(2.25rem, 1.8rem + 2vw, 3.5rem);
  --step-4: clamp(3rem, 2.2rem + 3.5vw, 5.25rem);

  --container: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--porcelain);
  color: var(--ink);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--display);
  line-height: 1.05;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }

p { margin: 0 0 1em; color: var(--ink-soft); }
a { color: inherit; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 1.6em;
  height: 1px;
  background: currentColor;
  display: inline-block;
}

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

.section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }
.section--graphite { background: var(--graphite); color: var(--porcelain); }
.section--graphite p { color: #b7bcc2; }
.section--graphite .eyebrow { color: var(--aqua); }
.section--navy { background: var(--navy); color: var(--porcelain); }
.section--navy p { color: #cdd8e2; }

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

/* Skip link */
.skip-link {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--navy); color: #fff; padding: 0.6em 1em;
  border-radius: 4px; z-index: 200; transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 3px;
}

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.95em 1.6em;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.35s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-deep); transform: translateY(-2px); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--navy); color: var(--navy); transform: translateY(-2px); }
.section--graphite .btn-ghost, .section--navy .btn-ghost { border-color: var(--porcelain); color: var(--porcelain); }
.section--graphite .btn-ghost:hover, .section--navy .btn-ghost:hover { border-color: var(--aqua); color: var(--aqua); }
.btn-arrow { transition: transform 0.35s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(246, 244, 240, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--metal-line);
}
.site-header__row {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 0.9rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--ink); }
.brand__mark { width: 40px; height: 40px; flex: none; }
.brand__word { font-family: "Nunito", var(--display); font-weight: 900; font-size: 1.1rem; line-height: 1.1; color: #4b4f54; }
.brand__word small { display: block; font-family: var(--mono); font-weight: 400; font-size: 0.62rem; letter-spacing: 0.12em; color: var(--metal); text-transform: uppercase; margin-top: 0.2em; }

.nav { display: flex; align-items: center; gap: clamp(1.2rem, 2vw, 2.2rem); }
.nav__links { display: flex; gap: clamp(1.2rem, 2vw, 2rem); list-style: none; margin: 0; padding: 0; }
.nav__links a {
  text-decoration: none; font-size: 0.92rem; color: var(--ink-soft);
  position: relative; padding-block: 0.2em;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 1px;
  background: var(--navy); transition: right 0.3s var(--ease);
}
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--ink); }
.nav__links a:hover::after, .nav__links a[aria-current="page"]::after { right: 0; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--ink); border-radius: 3px;
  width: 40px; height: 36px; align-items: center; justify-content: center; cursor: pointer;
}
.nav-toggle svg { width: 18px; height: 18px; }

@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav .btn-primary { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header.is-open .nav__links {
    display: flex; flex-direction: column; gap: 1.1rem;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--porcelain); padding: 1.5rem var(--gutter) 2rem;
    border-bottom: 1px solid var(--metal-line);
  }
  .site-header.is-open .nav .btn-primary { display: inline-flex; margin: 0 var(--gutter) 1.5rem; }
}

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 4rem);
  align-items: center; padding-block: clamp(3rem, 8vw, 6rem);
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }

.hero h1 { max-width: 14ch; }
.hero__lede { max-width: 42ch; font-size: 1.05rem; }
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

.hero__figure { position: relative; border-radius: 10px; overflow: hidden; border: 1px solid var(--metal-line); box-shadow: 0 30px 60px -30px rgba(16,19,23,0.35); }
.hero__figure img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero__figure svg { width: 100%; height: auto; }
.extrusion-path {
  fill: none; stroke: var(--navy); stroke-width: 2.5;
  stroke-linejoin: round; stroke-linecap: round;
}
.extrusion-path--ghost { stroke: var(--metal-line); stroke-width: 1.4; }
.extrusion-fill { fill: var(--aqua); opacity: 0.35; }
.extrusion-dim { font-family: var(--mono); font-size: 9px; fill: var(--metal); letter-spacing: 0.02em; }

/* ---------- Trust bar ---------- */
.trust-bar {
  background: var(--graphite); color: var(--porcelain);
}
.trust-bar__row {
  display: flex; flex-wrap: wrap; gap: 1.2rem 0;
  padding-block: 1.4rem;
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.04em;
}
.trust-bar__item {
  flex: 1 1 220px; padding-inline: 1.4rem;
  border-left: 1px solid var(--graphite-line);
  text-transform: uppercase; color: #cfd4d9;
}
.trust-bar__item:first-child { border-left: none; padding-left: 0; }
.trust-bar__item b { display: block; font-family: var(--display); font-size: 1.05rem; color: #fff; text-transform: none; letter-spacing: 0; margin-bottom: 0.15em; }

/* ---------- Grid / cards ---------- */
.grid { display: grid; gap: clamp(1.2rem, 3vw, 2rem); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid--3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid--3, .grid--2 { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--metal-line); border-radius: 6px;
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: 0 22px 40px -20px rgba(16, 19, 23, 0.35); }
.card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--porcelain-dim); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.card:hover .card__media img { transform: scale(1.06); }
.card__sheen {
  position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,0.55) 45%, transparent 60%);
  transform: translateX(-120%);
  transition: transform 0.9s var(--ease);
}
.card:hover .card__sheen { transform: translateX(120%); }
.card__body { padding: 1.4rem 1.5rem 1.6rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.card__tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--metal); text-transform: uppercase; }
.card__body h3 { font-size: 1.25rem; margin-bottom: 0.1em; }
.card__body p { font-size: 0.92rem; margin-bottom: 0.6em; }
.card__link { margin-top: auto; font-family: var(--mono); font-size: 0.82rem; text-decoration: none; color: var(--navy); }
.card__link:hover { text-decoration: underline; }

/* ---------- Spec table ---------- */
.spec-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 0.85rem; }
.spec-table th, .spec-table td { text-align: left; padding: 0.65em 0.9em; border-bottom: 1px solid var(--metal-line); }
.spec-table th { color: var(--metal); font-weight: 400; text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.08em; }
.section--graphite .spec-table th, .section--graphite .spec-table td { border-color: var(--graphite-line); }

.swatch-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 0.5rem; }
.swatch {
  font-family: var(--mono); font-size: 0.72rem; padding: 0.4em 0.8em;
  border: 1px solid var(--metal-line); border-radius: 999px; color: var(--ink-soft);
  display: inline-flex; align-items: center; gap: 0.5em;
}
.swatch::before { content: ""; width: 0.7em; height: 0.7em; border-radius: 50%; background: var(--dot, var(--metal)); }

/* ---------- Product detail section ---------- */
.product-section { padding-block: clamp(3rem, 7vw, 5.5rem); border-top: 1px solid var(--metal-line); }
.product-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 900px) { .product-layout { grid-template-columns: 1fr; } }
.product-layout__figure { border-radius: 8px; overflow: hidden; border: 1px solid var(--metal-line); }
.product-layout__figure img { width: 100%; height: auto; }
.product-number { font-family: var(--mono); color: var(--metal); font-size: 0.85rem; }

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { transition: none; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--graphite); color: #cfd4d9; padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2.5rem; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: #fff; font-size: 1rem; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.55rem; }
.footer-grid a { text-decoration: none; color: #b7bcc2; font-size: 0.92rem; }
.footer-grid a:hover { color: var(--aqua); }
.footer-bottom {
  margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--graphite-line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem;
  font-family: var(--mono); font-size: 0.75rem; color: #7f8791;
}

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); }
@media (max-width: 900px) { .contact-layout { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1.2rem; }
.form-field label { font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--metal); }
.form-field input, .form-field textarea, .form-field select {
  font-family: var(--body); font-size: 1rem; padding: 0.75em 0.9em;
  border: 1px solid var(--metal-line); border-radius: 4px; background: #fff; color: var(--ink);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(22, 50, 79, 0.12);
}
.map-embed { border: 1px solid var(--metal-line); border-radius: 8px; overflow: hidden; aspect-ratio: 4/3; }
.map-embed iframe { width: 100%; height: 100%; border: 0; }

/* ---------- Gallery ---------- */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
@media (max-width: 900px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .gallery-grid { grid-template-columns: 1fr; } }
.gallery-item { position: relative; overflow: hidden; border-radius: 6px; aspect-ratio: 3/4; cursor: pointer; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item__label {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 0.9rem 1rem;
  background: linear-gradient(to top, rgba(16,19,23,0.85), transparent);
  color: #fff; font-family: var(--mono); font-size: 0.78rem;
  transform: translateY(100%); transition: transform 0.4s var(--ease);
}
.gallery-item:hover .gallery-item__label { transform: translateY(0); }

.lightbox {
  position: fixed; inset: 0; background: rgba(16,19,23,0.92);
  display: none; align-items: center; justify-content: center; z-index: 300; padding: 2rem;
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: min(90vw, 900px); max-height: 85vh; border-radius: 6px; }
.lightbox__close {
  position: absolute; top: 1.5rem; right: 1.5rem; background: none; border: 1px solid #fff;
  color: #fff; width: 42px; height: 42px; border-radius: 50%; cursor: pointer; font-size: 1.1rem;
}

/* ---------- About page ---------- */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
@media (max-width: 760px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }
.stat { border-left: 2px solid var(--navy); padding-left: 1rem; }
.stat b { display: block; font-family: var(--display); font-size: var(--step-2); line-height: 1; }
.stat span { font-family: var(--mono); font-size: 0.78rem; color: var(--metal); text-transform: uppercase; letter-spacing: 0.05em; }