/* Casti Labs — styles.css */

:root {
  --paper: #faf8f2;
  --paper-2: #f2efe6;
  --ink: #1b1a16;
  --ink-soft: #4e4b43;
  --line: #e2dccd;
  --line-strong: #cfc8b8;
  --accent: #0f5c4f;
  --accent-deep: #0b453b;
  --ember: #c2432b;
  --card: #ffffff;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent);
  color: var(--paper);
}

.container {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 40px);
}

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

/* ---------- Skip link ---------- */

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 100;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.9rem;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 248, 242, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(27, 26, 22, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 30px;
  height: 30px;
  color: var(--accent);
  flex: none;
}

.brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 4vw, 28px);
}

.site-nav a {
  position: relative;
  padding: 10px 2px;
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 4px;
  height: 2px;
  background: var(--accent);
  transition: right 0.25s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  right: 0;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 12vh, 128px) 0 clamp(64px, 10vh, 112px);
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(27, 26, 22, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 26, 22, 0.04) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 15%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 15%, #000 25%, transparent 75%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  gap: 48px;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  }
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
  opacity: 0.6;
}

.hero-title {
  margin: 0 0 22px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-wrap: balance;
}

.hero-intro {
  max-width: 34em;
  margin: 0 0 34px;
  font-size: clamp(1.02rem, 1.6vw, 1.15rem);
  line-height: 1.65;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fdfcf9;
  box-shadow: 0 1px 2px rgba(11, 69, 59, 0.25);
}

.btn-primary:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(11, 69, 59, 0.22);
}

.btn-ghost {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink-soft);
  transform: translateY(-1px);
}

.hero-visual {
  display: none;
  width: 100%;
  max-width: 380px;
  height: auto;
  justify-self: end;
}

@media (min-width: 900px) {
  .hero-visual {
    display: block;
  }
}

.route {
  animation: dash 7s linear infinite;
}

@keyframes dash {
  to {
    stroke-dashoffset: -30;
  }
}

/* ---------- Sections ---------- */

.section {
  padding: clamp(72px, 12vh, 110px) 0;
  scroll-margin-top: 72px;
}

.section-title {
  margin: 0 0 26px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.65rem, 3.6vw, 2.3rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: balance;
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  gap: 24px 64px;
}

@media (min-width: 820px) {
  .about-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .about-grid .section-title {
    margin-bottom: 0;
  }
}

.about-copy p {
  margin: 0 0 18px;
  font-size: 1.08rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.about-copy p:last-child {
  margin-bottom: 0;
}

/* ---------- Products ---------- */

.products {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.product-grid {
  display: grid;
  gap: 24px;
  margin-top: 44px;
}

@media (min-width: 820px) {
  .product-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.product-card {
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 4vw, 36px);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 14px 34px rgba(27, 26, 22, 0.08);
}

.card-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  color: var(--accent);
}

.card-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.product-card h3 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.card-desc {
  margin: 0 0 22px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.card-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.card-specs li {
  padding: 5px 12px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.18s ease;
}

.card-link:hover {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.card-link:hover svg {
  transform: translate(2px, -2px);
}

.card-status {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: auto;
}

/* ---------- Contact ---------- */

.contact {
  text-align: center;
}

.contact .eyebrow {
  justify-content: center;
}

.contact .eyebrow::after {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
  opacity: 0.6;
}

.contact-copy {
  max-width: 42em;
  margin: 0 auto 26px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.email-link {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.email-link:hover {
  color: var(--accent);
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--ink);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding: 28px 0;
}

.footer-inner p {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: #b9b4a4;
}

.footer-inner p:first-child {
  color: var(--paper);
}

/* ---------- Reveal animation (JS-gated, motion-safe) ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

.js .reveal[data-step="2"] {
  transition-delay: 0.08s;
}

.js .reveal[data-step="3"] {
  transition-delay: 0.16s;
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .route {
    animation: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}