/* =============================================
   3D Print Studio — Style Sheet v2
   Premium, dark, engineering-inspired
   ============================================= */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --neon-blue: #00d4ff;
  --neon-violet: #7c3aed;
  --neon-cyan: #22d3ee;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-gradient: linear-gradient(135deg, #00d4ff, #7c3aed);
  --danger: #ef4444;
  --success: #22c55e;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 4px 30px rgba(0,0,0,0.3);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

/* --- Technical Grid Background --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* --- Typography --- */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }

.section {
  padding: 90px 0;
  position: relative;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  text-align: center;
  margin-bottom: 12px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 18px;
  max-width: 650px;
  margin: 0 auto 50px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-xs);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  min-height: 48px;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 0 20px rgba(0,212,255,0.15);
}

.btn-primary:hover {
  box-shadow: 0 0 40px rgba(0,212,255,0.3);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--neon-blue);
  border: 1px solid var(--neon-blue);
}

.btn-secondary:hover {
  background: rgba(0,212,255,0.1);
  box-shadow: 0 0 20px rgba(0,212,255,0.2);
  transform: translateY(-2px);
}

/* Focus states */
:focus-visible {
  outline: 2px solid var(--neon-blue);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

/* --- HEADER --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  height: var(--header-h);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav a {
  font-size: 15px;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  font-weight: 500;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition);
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--text-primary);
}

.header-nav a:hover::after,
.header-nav a.active::after {
  width: 100%;
}

.header-nav a.active {
  color: var(--neon-blue);
}

.header-cta .btn {
  padding: 10px 22px;
  font-size: 14px;
  min-height: 40px;
}

/* --- BURGER --- */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.burger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile overlay */
.header-overlay {
  display: none;
}

/* --- HERO --- */
.hero {
  padding: 140px 0 90px;
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

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

.hero-bg .gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  animation: orbFloat 20s ease-in-out infinite;
}

.hero-bg .gradient-orb:nth-child(1) {
  width: 600px; height: 600px;
  background: var(--neon-blue);
  top: -200px; right: -200px;
  animation-delay: 0s;
}

.hero-bg .gradient-orb:nth-child(2) {
  width: 400px; height: 400px;
  background: var(--neon-violet);
  bottom: -100px; left: -100px;
  animation-delay: -7s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.1); }
  66% { transform: translate(-20px, 30px) scale(0.9); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-content h1 {
  font-size: clamp(32px, 5vw, 56px);
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero-content p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 34px;
  line-height: 1.7;
}

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

/* Hero 3D visual */
.hero-visual {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  height: 400px;
  z-index: 1;
}

.hero-visual svg {
  width: 100%;
  height: 100%;
  animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

/* --- Hero entrance animation --- */
.hero-entrance {
  opacity: 0;
  transform: translateY(40px);
  animation: heroEntrance 0.8s ease-out forwards;
}

.hero-entrance:nth-child(1) { animation-delay: 0.1s; }
.hero-entrance:nth-child(2) { animation-delay: 0.2s; }
.hero-entrance:nth-child(3) { animation-delay: 0.3s; }
.hero-entrance:nth-child(4) { animation-delay: 0.4s; }

@keyframes heroEntrance {
  to { opacity: 1; transform: translateY(0); }
}

/* --- Benefits Grid --- */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.benefit-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.benefit-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  border-color: rgba(0,212,255,0.2);
}

.benefit-icon {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  background: rgba(0,212,255,0.1);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-blue);
}

.benefit-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.benefit-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* --- Items Grid (что печатаем) --- */
.items-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.item-tag {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  color: var(--text-secondary);
}

.item-tag:hover {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(0,212,255,0.08);
}

/* --- Trust Grid --- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.trust-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: var(--transition);
}

.trust-item:hover {
  background: var(--bg-card-hover);
}

.trust-icon {
  width: 36px; height: 36px;
  min-width: 36px;
  background: rgba(124,58,237,0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-violet);
}

.trust-item p { font-size: 14px; color: var(--text-secondary); }

/* --- Prices Grid --- */
.prices-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.price-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 28px 16px;
  text-align: center;
  transition: var(--transition);
}

.price-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-3px);
}

.price-name {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.price-value {
  font-size: 24px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.price-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  max-width: 700px;
  margin: 20px auto 0;
}

/* --- Services Grid (index preview) --- */
.services-preview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.serv-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}

.serv-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  border-color: rgba(0,212,255,0.2);
}

.serv-icon {
  width: 48px; height: 48px;
  margin: 0 auto 14px;
  background: rgba(124,58,237,0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-violet);
}

.serv-card h3 { font-size: 17px; margin-bottom: 8px; }
.serv-card p { font-size: 13px; color: var(--text-secondary); }

/* --- Portfolio preview (index) --- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gallery-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.gallery-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,212,255,0.2);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.gallery-card-image {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.gallery-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.gallery-card-image svg {
  width: 80px; height: 80px;
  opacity: 0.25;
  transition: var(--transition);
  filter: drop-shadow(0 0 8px rgba(0,212,255,0.08));
}

.gallery-card:hover .gallery-card-image svg {
  transform: scale(1.15) rotate(3deg);
  opacity: 0.4;
  filter: drop-shadow(0 0 16px rgba(0,212,255,0.15));
}

.gallery-card-body {
  padding: 16px;
}

.gallery-card-body .cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--neon-blue);
  margin-bottom: 6px;
  font-weight: 600;
}

.gallery-card-body h4 {
  font-size: 15px;
  margin-bottom: 4px;
}

.gallery-card-body p {
  font-size: 13px;
  color: var(--text-muted);
}

/* --- CTA Block --- */
.cta-block {
  background: var(--accent-gradient);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(255,255,255,0.03) 20px,
    rgba(255,255,255,0.03) 21px
  );
}

.cta-block h2 {
  font-size: clamp(24px, 3vw, 36px);
  color: #fff;
  margin-bottom: 12px;
  position: relative;
}

.cta-block p {
  color: rgba(255,255,255,0.8);
  font-size: 17px;
  margin-bottom: 28px;
  position: relative;
}

.cta-block .btn {
  background: #fff;
  color: #0a0a0f;
  position: relative;
}

.cta-block .btn:hover {
  box-shadow: 0 0 40px rgba(255,255,255,0.3);
  transform: translateY(-2px);
}

/* --- FOOTER --- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer h4 {
  font-size: 16px;
  margin-bottom: 16px;
}

.footer p, .footer a {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 2;
  display: block;
  transition: var(--transition);
}

.footer a:hover { color: var(--neon-blue); }

.footer-links a:hover { padding-left: 4px; }

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* =============================================
   PAGE-SPECIFIC STYLES
   ============================================= */

/* --- Services Page --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 36px 24px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover::before { opacity: 1; }

.service-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.service-icon {
  width: 52px; height: 52px;
  margin-bottom: 16px;
  background: rgba(0,212,255,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-blue);
}

.service-card h3 { font-size: 20px; margin-bottom: 10px; }
.service-card .serv-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 14px; }
.service-card .serv-use { font-size: 13px; color: var(--text-muted); font-style: italic; }

/* Materials grid */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.material-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 28px 16px;
  text-align: center;
  transition: var(--transition);
}

.material-card:hover {
  border-color: var(--neon-violet);
  transform: translateY(-3px);
}

.material-name {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--neon-cyan);
}

.material-desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }
.material-use { font-size: 12px; color: var(--text-muted); }
.material-strength { font-size: 12px; color: var(--neon-blue); margin-top: 6px; }

/* --- Portfolio page --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  padding: 10px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  min-height: 44px;
}

.filter-btn:hover {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
}

.filter-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
}

.portfolio-full-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.portfolio-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.portfolio-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,212,255,0.2);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.portfolio-visual {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.portfolio-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.portfolio-visual svg {
  width: 120px;
  height: 120px;
  opacity: 0.3;
  transition: var(--transition);
  filter: drop-shadow(0 0 10px rgba(0,212,255,0.1));
}

.portfolio-card:hover .portfolio-visual svg {
  transform: scale(1.15) rotate(3deg);
  opacity: 0.5;
  filter: drop-shadow(0 0 20px rgba(0,212,255,0.2));
}

.portfolio-visual .pattern-layer {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%);
  background-size: 20px 20px;
  pointer-events: none;
}

.portfolio-body {
  padding: 20px;
}

.portfolio-body .p-cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--neon-blue);
  margin-bottom: 4px;
  font-weight: 600;
}

.portfolio-body h3 { font-size: 17px; margin-bottom: 6px; }
.portfolio-body .p-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; line-height: 1.5; }
.portfolio-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.portfolio-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 16%;
  right: 16%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-violet));
  z-index: 0;
}

.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
}

.step-card h3 { font-size: 18px; margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--text-secondary); }

/* --- About page --- */
.about-text {
  max-width: 800px;
  margin: 0 auto 50px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  text-align: center;
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--neon-blue), var(--neon-violet));
}

.timeline-item {
  padding: 0 0 30px 60px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--accent-gradient);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-item h3 { font-size: 18px; margin-bottom: 4px; }
.timeline-item p { font-size: 14px; color: var(--text-secondary); }

/* Comparison table */
.comp-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--glass-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.comp-table th,
.comp-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--glass-border);
  font-size: 14px;
}

.comp-table th {
  background: rgba(0,212,255,0.05);
  color: var(--neon-blue);
  font-weight: 700;
  font-size: 15px;
}

.comp-table tr:last-child td { border-bottom: none; }
.comp-table td:first-child { font-weight: 600; color: var(--text-primary); }
.comp-table td { color: var(--text-secondary); }

.comp-table .yes { color: var(--success); }
.comp-table .no { color: var(--danger); }

/* --- Contacts page --- */
.contacts-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xs);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 15px;
  transition: var(--transition);
  min-height: 48px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}

.form-group select option { background: #1a1a2e; }

.form-group.error input,
.form-group.error textarea,
.form-group.error select {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.1);
}

.form-error-msg {
  display: none;
  font-size: 13px;
  color: var(--danger);
  margin-top: 4px;
}

.form-group.error .form-error-msg { display: block; }

.form-success {
  display: none;
  background: rgba(34,197,94,0.1);
  border: 1px solid var(--success);
  border-radius: var(--radius-sm);
  padding: 24px;
  text-align: center;
  margin-top: 20px;
}

.form-success .success-icon {
  font-size: 36px;
  margin-bottom: 8px;
}

.form-success h3 { color: var(--success); margin-bottom: 6px; }
.form-success p { font-size: 14px; color: var(--text-secondary); }

/* Contact info */
.contact-info-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.contact-card-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--neon-blue);
  margin-bottom: 4px;
  font-weight: 600;
}

.contact-card-value {
  font-size: 15px;
  color: var(--text-muted);
}

.map-placeholder {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 40px;
}

.map-placeholder svg { margin-bottom: 12px; opacity: 0.3; }

/* --- Stats Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.stat-card:hover {
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.stat-number {
  font-size: 42px;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 15px;
  color: var(--text-secondary);
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --- FAQ Accordion --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: rgba(0,212,255,0.15); }

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  min-height: 60px;
}

.faq-question span:last-child {
  font-size: 20px;
  transition: var(--transition);
  color: var(--neon-blue);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-question span:last-child {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================
   RESPONSIVE
   ============================================= */

/* --- Tablet (≤1024px) --- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-full-grid { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .items-grid { grid-template-columns: repeat(4, 1fr); }
  .prices-grid { grid-template-columns: repeat(3, 1fr); }
  .materials-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-visual { display: none; }
  .contacts-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

/* --- Mobile (≤768px) --- */
@media (max-width: 768px) {
  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10,10,15,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 40px;
    gap: 8px;
    transition: right 0.3s ease;
    z-index: 999;
    border-left: 1px solid var(--glass-border);
  }

  .header-nav.active { right: 0; }

  .header-nav a {
    width: 100%;
    padding: 14px 0;
    font-size: 17px;
    border-bottom: 1px solid var(--glass-border);
  }

  .header-nav a::after { display: none; }

  .burger { display: flex; }

  .header-nav .header-cta {
    width: 100%;
    margin-top: 16px;
  }

  .header-nav .header-cta .btn { width: 100%; }

  .header-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .header-overlay.active {
    opacity: 1;
    pointer-events: all;
  }

  .section { padding: 60px 0; }
  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero-content p { font-size: 16px; }

  .benefits-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .benefit-card { padding: 24px 16px; }

  .items-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: 1fr; }
  .prices-grid { grid-template-columns: repeat(2, 1fr); }

  .services-preview { grid-template-columns: repeat(2, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .portfolio-full-grid { grid-template-columns: 1fr; }
  .materials-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: 1fr; }
  .steps-grid::before { display: none; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }

  .filters { gap: 8px; }
  .filter-btn { padding: 8px 14px; font-size: 13px; }

  .footer-grid { grid-template-columns: 1fr; gap: 30px; }

  .cta-block { padding: 40px 24px; }

  .comp-table { font-size: 13px; }
  .comp-table th, .comp-table td { padding: 12px 14px; }
}

/* --- Small Mobile (≤480px) --- */
@media (max-width: 480px) {
  .benefits-grid { grid-template-columns: 1fr; }
  .items-grid { grid-template-columns: 1fr; }
  .prices-grid { grid-template-columns: 1fr; }
  .services-preview { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .materials-grid { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
  .gallery-card-image { height: 130px; }
  .portfolio-visual { height: 160px; }
}

/* --- prefers-reduced-motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: 120px 0 60px;
  text-align: center;
  position: relative;
}

.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  margin-bottom: 14px;
}

.page-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

/* --- Hexagon pattern decoration --- */
.hex-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='70' viewBox='0 0 80 70'%3E%3Cpath d='M40 0L80 20v30L40 70 0 50V20z' fill='none' stroke='%2300d4ff' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 80px 70px;
}

/* Inline CTA after sections */
.inline-cta {
  text-align: center;
  margin-top: 40px;
}

.faq-item.active