/* ==========================================================================
   Meridian Electronics — design tokens
   Palette pulled from the physical product: FR4 paper, soldermask green,
   copper trace/pad tone. Type: Space Grotesk (display), IBM Plex Sans (body),
   IBM Plex Mono (pin tables, designators, data — same register as the datasheets).
   ========================================================================== */

:root {
  --paper: #FAF9F5;
  --paper-dim: #F1EFE6;
  --ink: #1B1B18;
  --ink-soft: #57554C;
  --line: #DDD9CC;

  --green: #1B4332;
  --green-soft: #2F5233;
  --copper: #B5651D;
  --copper-soft: #D98A4C;

  --radius: 3px;
  --max-w: 1180px;

  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }

.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

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

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 88px 32px;
}
.section-inner.narrow { max-width: 760px; }
.section-inner.center { text-align: center; }

.section-tag {
  color: var(--copper);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  margin: 0 0 18px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.section-lede {
  color: var(--ink-soft);
  max-width: 620px;
  font-size: 1.05rem;
  margin: 0 0 8px;
}

/* ==========================================================================
   Header — echoes the datasheet page header: small wordmark, hairline rule
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wordmark-mark {
  height: 40px;
  width: 40px;
  object-fit: contain;
}

.wordmark-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.main-nav {
  display: flex;
  gap: 30px;
}

.main-nav a {
  font-size: 0.92rem;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.15s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--ink);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1.5px;
  background: var(--copper);
  transition: right 0.18s ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  right: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  display: block;
}

.header-rule {
  position: relative;
  height: 1px;
  background: var(--line);
  overflow: visible;
}

.signal-dot {
  position: absolute;
  top: -3px;
  left: -3%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--copper);
  animation: travel 7s linear infinite;
}

@keyframes travel {
  0% { left: -3%; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { left: 103%; opacity: 0; }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding: 120px 32px 100px;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 30%, transparent 75%);
}

.hero-inner {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  color: var(--copper);
  font-size: 0.78rem;
  font-weight: 500;
  margin: 0 0 22px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.4vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}

.hero-sub {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto 38px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 26px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--green);
  color: var(--paper);
}
.btn-primary:hover { background: var(--green-soft); }

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

/* ==========================================================================
   Trace dividers — signature element: a copper trace with a via, standing
   in for a section rule. Direction/turn is randomized per divider.
   ========================================================================== */

.trace-divider {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}
.trace-divider svg {
  width: 100%;
  height: 22px;
  display: block;
  overflow: visible;
}
.trace-divider path {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.5;
}
.trace-divider circle {
  fill: var(--copper);
  opacity: 0.85;
}

/* ==========================================================================
   Manifesto / About (shared prose styling)
   ========================================================================== */

.manifesto { background: var(--paper-dim); }

.manifesto-text {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.1vw, 1.5rem);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: -0.005em;
  margin: 0 0 28px;
}

.manifesto-sign {
  color: var(--copper);
  font-size: 0.85rem;
}

.about-text {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0 0 20px;
}

/* ==========================================================================
   Products
   ========================================================================== */

.product-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.product-card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.product-card:hover {
  border-color: var(--copper);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -18px rgba(27, 27, 24, 0.35);
}

.product-tag {
  position: absolute;
  top: -11px;
  left: 24px;
  background: var(--green);
  color: var(--paper);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.product-media {
  height: 360px;
  border-radius: 2px;
  background:
    repeating-linear-gradient(45deg, var(--paper-dim), var(--paper-dim) 8px, var(--paper) 8px, var(--paper) 16px);
  border: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: 20px;
}

.media-placeholder {
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.6;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2px;
}

.product-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.product-blurb {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0 0 18px;
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.product-specs li {
  font-size: 0.72rem;
  color: var(--green-soft);
  background: var(--paper-dim);
  border: 1px solid var(--line);
  padding: 5px 9px;
  border-radius: 2px;
}

.product-links {
  display: flex;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.shop-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink);
  position: relative;
}
.shop-link::before {
  content: "\2197";
  margin-right: 4px;
  color: var(--copper);
}
.shop-link:hover { color: var(--copper); }

/* ==========================================================================
   Datasheets
   ========================================================================== */

.datasheet-list {
  margin-top: 36px;
  border-top: 1px solid var(--line);
}

.datasheet-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 10px;
}

.ds-name {
  font-size: 1rem;
}

.ds-link {
  color: var(--copper);
  font-size: 0.82rem;
  font-weight: 500;
  transition: opacity 0.15s ease;
}
.ds-link:hover { opacity: 0.7; }

.datasheets code {
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 2px 6px;
  font-size: 0.85em;
}

/* ==========================================================================
   Policies
   ========================================================================== */

.policy-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.policy-card {
  background: var(--paper);
  padding: 26px 22px;
}

.policy-card h3 {
  font-size: 0.75rem;
  color: var(--copper);
  margin: 0 0 12px;
  letter-spacing: 0.05em;
}

.policy-card p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.shop-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 36px 0 30px;
}

.shop-btn {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 14px 30px;
  font-size: 0.85rem;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.shop-btn:hover {
  background: var(--green);
  border-color: var(--green);
  color: var(--paper);
}

.contact-email {
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.contact-email a {
  color: var(--copper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 26px 32px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.footer-social {
  display: flex;
  gap: 18px;
}
.footer-social a {
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
.footer-social a:hover {
  color: var(--copper);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 860px) {
  .product-grid { grid-template-columns: 1fr; }
  .policy-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 32px 18px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .main-nav a:last-child { border-bottom: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 90px 24px 70px; }
  .section-inner { padding: 64px 24px; }
}

@media (max-width: 540px) {
  .policy-grid { grid-template-columns: 1fr; }
}