/* ── Design tokens ────────────────────────────────── */
:root {
  --bg: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --surface: #161e2e;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(14, 165, 233, 0.4);
  --text: #f0f4fc;
  --text-muted: #94a3b8;
  --primary: #0ea5e9;
  --primary-light: #38bdf8;
  --primary-glow: rgba(14, 165, 233, 0.25);
  --accent: #f59e0b;
  --radius: 0.75rem;
  --radius-lg: 1.25rem;
  --transition: 200ms ease;
  --container: min(1140px, 90%);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.15);
}

/* ── Reset ───────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
}

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

body {
  font-family: "Manrope", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  padding: 0;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", system-ui, sans-serif;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

p {
  color: var(--text-muted);
}

/* ── Utilities ───────────────────────────────────── */
.container {
  width: var(--container);
  margin-inline: auto;
}

/* ── Subtle background ───────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(14, 165, 233, 0.06), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(245, 158, 11, 0.04), transparent 40%);
  z-index: -1;
}

/* ── Header / Navbar ─────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.site-header.scrolled {
  background: rgba(10, 14, 23, 0.92);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.brand-icon {
  height: 2.2rem;
  width: auto;
}

.brand-text {
  height: 1.4rem;
  width: auto;
}

/* Navigation */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 0.5rem 1.1rem !important;
  border-radius: 999px !important;
  font-weight: 600 !important;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition) !important;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--primary-glow);
  background: var(--primary-light) !important;
}

/* Language switch */
.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  margin-right: 0.5rem;
  padding: 0.2rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
}

.language-switch a {
  padding: 0.25rem 0.5rem !important;
  font-size: 0.78rem !important;
  font-weight: 600 !important;
  border-radius: 0.4rem;
  letter-spacing: 0.04em;
}

.language-switch a[aria-current="page"] {
  color: var(--text) !important;
  background: rgba(14, 165, 233, 0.15) !important;
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  padding: 0;
  cursor: pointer;
  align-items: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding-top: 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(10, 14, 23, 0.92) 0%, rgba(10, 14, 23, 0.7) 45%, rgba(10, 14, 23, 0.3) 100%),
    linear-gradient(to top, rgba(10, 14, 23, 1) 0%, transparent 25%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: var(--container);
  margin-inline: auto;
  padding-block: clamp(3rem, 8vh, 6rem);
  max-width: 640px;
  margin-right: auto;
  margin-left: max(calc((100% - 1140px) / 2), 5%);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-light);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1.25rem;
}

.hero-eyebrow::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  color: var(--text);
  margin-bottom: 1.25rem;
  max-width: 600px;
}

.hero-desc {
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-decoration: none;
  color: var(--text);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.4);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  border-color: var(--border-hover);
  background: rgba(255, 255, 255, 0.04);
}

/* Metrics bar */
.hero-metrics {
  position: relative;
  z-index: 2;
  width: var(--container);
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-bottom: clamp(2rem, 5vh, 4rem);
}

.metric {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.metric:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.metric-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.6rem;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(14, 165, 233, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--primary-light);
}

.metric-icon svg {
  width: 1.15rem;
  height: 1.15rem;
}

.metric h3 {
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.1rem;
}

.metric p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ── Sections ────────────────────────────────────── */
.section {
  padding-block: clamp(4rem, 10vw, 7rem);
}

.section-dark {
  background: var(--surface);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-label {
  display: inline-block;
  color: var(--primary-light);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  color: var(--text);
  margin-bottom: 0.75rem;
}

.section-header p {
  font-size: 1.05rem;
  max-width: 520px;
  margin-inline: auto;
}

/* ── Cards grid ──────────────────────────────────── */
.card-grid {
  display: grid;
  gap: 1rem;
}

.card-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.7rem;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(56, 189, 248, 0.06));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--primary-light);
}

.card-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.card h3 {
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ── Comparison (Resin vs Filament) ──────────────── */
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.comparison-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.comparison-col.highlight {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.comparison-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.comparison-col.highlight .comparison-badge {
  background: rgba(14, 165, 233, 0.15);
  color: var(--primary-light);
}

.comparison-col:not(.highlight) .comparison-badge {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
}

.comparison-col h3 {
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 1rem;
}

.comparison-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.comparison-list li::before {
  content: "✓";
  color: var(--primary-light);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.1em;
}

.comparison-col:not(.highlight) .comparison-list li::before {
  color: var(--text-muted);
  content: "–";
}

/* ── Contact section ─────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.contact-info h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  color: var(--text);
  margin-bottom: 1rem;
}

.contact-info p {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.contact-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-features li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

/* Form */
.form-success {
  background: rgba(14, 165, 105, 0.15);
  border: 1px solid rgba(14, 165, 105, 0.4);
  color: #34d399;
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 600;
}

.quote-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

.quote-form .btn {
  align-self: flex-start;
  margin-top: 0.5rem;
}

/* ── Footer ──────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand img {
  height: 1.6rem;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Scroll reveal ───────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Focus states ────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 1024px) {
  .card-grid.cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .comparison,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    top: 4rem;
    z-index: 99;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem;
    background: rgba(10, 14, 23, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 250ms ease, transform 250ms ease, visibility 250ms ease;
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    font-size: 1rem;
    padding: 0.75rem 1rem;
  }

  .language-switch {
    margin-right: 0;
    margin-bottom: 0.5rem;
    align-self: flex-start;
  }

  .card-grid.cols-3,
  .card-grid.cols-2 {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    margin-left: auto;
    margin-right: auto;
    max-width: none;
    width: var(--container);
    padding-block: clamp(2rem, 5vh, 4rem);
  }

  .hero-bg::after {
    background:
      linear-gradient(to bottom, rgba(10, 14, 23, 0.85) 0%, rgba(10, 14, 23, 0.6) 40%, rgba(10, 14, 23, 0.4) 60%, rgba(10, 14, 23, 1) 100%);
  }

  .hero h1 {
    font-size: clamp(1.8rem, 6vw, 2.6rem);
    max-width: none;
  }

  .hero-desc {
    max-width: none;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .brand-text {
    height: 1.1rem;
  }

  .brand-icon {
    height: 1.8rem;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}