/* ===== Variables ===== */
:root {
  --bg: #0c0e12;
  --bg-elevated: #12151c;
  --bg-card: #161a22;
  --text: #e8eaef;
  --text-muted: #8b92a3;
  --accent: #10b981;
  --accent-dim: #059669;
  --accent-glow: rgba(16, 185, 129, 0.25);
  --border: rgba(255, 255, 255, 0.06);
  --font-heading: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
  --tap-min: 44px;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ===== Accessibility ===== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  border-radius: var(--radius);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

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

/* ===== Background effects ===== */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 70%);
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (max-width: 479px) {
  .container { padding: 0 1rem; }
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  padding-left: max(1.5rem, env(safe-area-inset-left));
  padding-right: max(1.5rem, env(safe-area-inset-right));
  background: rgba(12, 14, 18, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

@media (max-width: 767px) {
  :root { --header-h: 64px; }
  .header { padding-left: max(1rem, env(safe-area-inset-left)); padding-right: max(1rem, env(safe-area-inset-right)); }
}

.nav {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  color: var(--accent);
  font-size: 1rem;
}

.logo-accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex: 1;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  display: inline-flex;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .nav-links { display: none; }
  .nav { gap: 0.75rem; }
  .nav-cta {
    padding: 0.65rem 1.1rem;
    min-height: var(--tap-min);
    min-width: max-content;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    border-radius: var(--radius);
    box-shadow: 0 2px 12px var(--accent-glow);
  }
  .nav-cta:active {
    transform: scale(0.98);
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  min-height: var(--tap-min);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  touch-action: manipulation;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-ghost {
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.03);
}

.btn-lg {
  padding: 1rem 1.75rem;
  font-size: 1rem;
}

.btn-success {
  background: #22c55e !important;
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.25);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  padding: calc(var(--header-h) + 2rem) 1.5rem 3rem;
  padding-left: max(1.5rem, env(safe-area-inset-left));
  padding-right: max(1.5rem, env(safe-area-inset-right));
}

@media (max-width: 479px) {
  .hero {
    padding: calc(var(--header-h) + 1.5rem) 1rem 2.5rem;
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding: calc(var(--header-h) + 3rem) 1.5rem 4rem;
    padding-left: max(1.5rem, calc((100vw - 1120px) / 2 + 1.5rem));
    padding-right: max(1.5rem, calc((100vw - 1120px) / 2 + 1.5rem));
  }
}

.hero-content {
  max-width: 560px;
}

.hero-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-title .line {
  display: block;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 480px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Hero 3D printer animation ===== */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  margin-top: 1.5rem;
}

@media (min-width: 900px) {
  .hero-visual {
    margin-top: 0;
    min-height: 400px;
  }
}

.hero-printer {
  position: relative;
  width: 200px;
  height: 160px;
  color: var(--accent);
}

@media (min-width: 900px) {
  .hero-printer {
    width: 260px;
    height: 208px;
  }
}

.printer-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.printer-base,
.printer-bed,
.printer-rail,
.printer-gantry {
  color: var(--accent);
  opacity: 0.7;
}

.printer-gantry {
  transform-origin: 100px 88px;
  animation: gantry-move 4s ease-in-out infinite;
}

.printer-extruder {
  transform-origin: 100px 88px;
  animation: extruder-move 4s ease-in-out infinite;
  color: var(--accent);
}

.printer-output {
  transform-origin: 100px 108px;
  animation: print-grow 6s ease-in-out infinite;
}

@keyframes gantry-move {
  0%, 100% { transform: translateY(0); }
  25% { transform: translateY(-8px); }
  50% { transform: translateY(-16px); }
  75% { transform: translateY(-8px); }
}

@keyframes extruder-move {
  0%, 100% { transform: translate(-35px, 0); }
  25% { transform: translate(35px, -8px); }
  50% { transform: translate(35px, -16px); }
  75% { transform: translate(-35px, -8px); }
}

@keyframes print-grow {
  0%, 12% { transform: scaleY(0); }
  30% { transform: scaleY(0.4); }
  50% { transform: scaleY(0.85); }
  70%, 100% { transform: scaleY(1); }
}

.hero-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(40px);
  opacity: 0.5;
  animation: glow-pulse 4s ease-in-out infinite;
}

@media (min-width: 900px) {
  .hero-glow { width: 280px; height: 280px; filter: blur(60px); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.08); }
}

/* ===== Animate-in (hero) ===== */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  animation: animate-in 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-in[data-delay="1"] { animation-delay: 0.1s; }
.animate-in[data-delay="2"] { animation-delay: 0.2s; }
.animate-in[data-delay="3"] { animation-delay: 0.35s; }
.animate-in[data-delay="4"] { animation-delay: 0.5s; }

@keyframes animate-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Sections ===== */
.section {
  position: relative;
  z-index: 1;
  padding: 3.5rem 0;
}

@media (min-width: 768px) {
  .section { padding: 5rem 0; }
}

.section-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
}

/* Scroll-triggered animations — always visible; subtle reveal on scroll */
.animate-on-scroll {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll:not(.visible) {
  opacity: 1;
  transform: translateY(20px);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll[data-delay="1"] { transition-delay: 0.1s; }
.animate-on-scroll[data-delay="2"] { transition-delay: 0.2s; }
.animate-on-scroll[data-delay="3"] { transition-delay: 0.3s; }
.animate-on-scroll[data-delay="4"] { transition-delay: 0.4s; }

/* ===== Services ===== */
.services {
  background: linear-gradient(180deg, transparent 0%, var(--bg-elevated) 15%, var(--bg-elevated) 85%, transparent 100%);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.35);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  color: var(--accent);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Process ===== */
.process-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
  }
}

.process-step {
  position: relative;
  padding-left: 1rem;
  padding-top: 1.5rem;
  border-left: 2px solid var(--border);
  transition: border-color var(--transition);
}

.process-step:hover {
  border-left-color: var(--accent);
}

.step-num {
  position: absolute;
  left: -0.6rem;
  top: -0.1rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--accent);
  background: var(--bg);
  padding: 0 0.25rem;
}

.process-step h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.process-step p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Gallery ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .gallery-grid { gap: 1rem; }
}

@media (min-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

.gallery-item {
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition);
}

.gallery-item:hover {
  transform: scale(1.02);
}

.gallery-img {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.5s var(--transition);
}

.gallery-item:hover .gallery-img {
  transform: scale(1.08);
}

.gallery-img-1 {
  background-color: #1e293b;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z' fill='%2310b981' fill-opacity='0.14'/%3E%3C/g%3E%3C/svg%3E");
}

.gallery-img-2 {
  background-color: #292524;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 4l4 8 8 2-6 6 2 8-8-4-8 4 2-8-6-6 8-2 4-8z' fill='%2310b981' fill-opacity='0.2'/%3E%3C/svg%3E");
}

.gallery-img-3 {
  background-color: #1c1917;
  background-image: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 40h80M40 0v80M20 20l40 40M60 20L20 60' stroke='%2310b981' stroke-width='0.5' stroke-opacity='0.22'/%3E%3C/svg%3E");
}

.gallery-img-4 {
  background-color: #0f172a;
  background-image: url("data:image/svg+xml,%3Csvg width='50' height='50' viewBox='0 0 50 50' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='25' cy='25' r='20' fill='none' stroke='%2310b981' stroke-width='0.5' stroke-opacity='0.22'/%3E%3Ccircle cx='25' cy='25' r='12' fill='none' stroke='%2310b981' stroke-width='0.5' stroke-opacity='0.18'/%3E%3C/svg%3E");
}

.gallery-item figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
}

.gallery-item {
  position: relative;
}

.gallery-item:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

/* ===== CTA ===== */
.cta {
  padding-bottom: 4rem;
}

@media (min-width: 768px) {
  .cta { padding-bottom: 6rem; }
}

.cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.25rem;
  max-width: 640px;
  margin: 0 auto;
}

@media (min-width: 480px) {
  .cta-box { padding: 2.5rem 2rem; }
}

@media (min-width: 768px) {
  .cta-box { padding: 4rem; }
}

.cta-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 0.5rem;
}

.cta-desc {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.cta-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (max-width: 479px) {
  .cta-form .form-row { grid-template-columns: 1fr; }
}

.cta-form input,
.cta-form textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  min-height: var(--tap-min);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
}

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

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

.cta-form textarea {
  resize: vertical;
  min-height: 120px;
  margin-bottom: 1rem;
}

/* File attachment */
.form-file-wrap {
  margin-bottom: 1.5rem;
}

.form-file-input {
  position: absolute;
  width: 0.1px;
  height: 0.1px;
  opacity: 0;
  overflow: hidden;
  z-index: -1;
}

.form-file-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--tap-min);
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  touch-action: manipulation;
}

.form-file-label:hover {
  border-color: rgba(16, 185, 129, 0.4);
  color: var(--text);
  background: rgba(16, 185, 129, 0.06);
}

.form-file-input:focus-visible + .form-file-label {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-file-input:disabled + .form-file-label {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-file-label.has-file {
  border-style: solid;
  border-color: rgba(16, 185, 129, 0.35);
  color: var(--accent);
}

.form-file-icon {
  font-size: 1.1rem;
}

.form-file-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.cta-form button {
  width: 100%;
}

@media (min-width: 480px) {
  .cta-form button { width: auto; }
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 1;
  padding: 2.5rem 0;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  padding-bottom: max(2.5rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
}

@media (min-width: 768px) {
  .footer {
    padding: 3rem 0;
    padding-left: 0;
    padding-right: 0;
    padding-bottom: 3rem;
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    text-align: left;
  }
}

.footer-brand .logo {
  display: inline-flex;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

@media (max-width: 767px) {
  .footer-social { justify-content: center; }
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  width: 44px;
  height: 44px;
  color: var(--text-muted);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
  touch-action: manipulation;
}

.footer-social a:hover {
  color: var(--accent);
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.08);
  transform: translateY(-2px);
}

.footer-social a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .footer-nav ul { justify-content: flex-end; }
}

.footer-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-nav a:hover {
  color: var(--text);
}

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

@media (min-width: 768px) {
  .footer-legal { text-align: right; }
}