/* ===== ForeverPure Modern Design System ===== */
:root {
  --primary: #00c8ff;
  --primary-dark: #0099cc;
  --accent: #00ff88;
  --bg-dark: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --surface: #151d2e;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border: rgba(255, 255, 255, 0.06);
  --glow: rgba(0, 200, 255, 0.15);
  --gradient: linear-gradient(135deg, #00c8ff, #00ff88);
  --gradient-subtle: linear-gradient(135deg, rgba(0,200,255,0.1), rgba(0,255,136,0.1));
  --radius: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(0, 200, 255, 0.1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1280px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent);
}

::selection {
  background: rgba(0, 200, 255, 0.3);
  color: #fff;
}

/* ===== Particle Canvas ===== */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

/* ===== Utility ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-card {
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.glass-card:hover {
  border-color: rgba(0, 200, 255, 0.15);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 14, 23, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(0, 200, 255, 0.3));
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.logo-tagline {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
  padding: 10px 24px;
  background: var(--gradient);
  color: #000 !important;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 200, 255, 0.3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: saturate(0.6);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(10, 14, 23, 0.7) 0%,
    rgba(10, 14, 23, 0.5) 40%,
    rgba(10, 14, 23, 0.85) 80%,
    var(--bg-dark) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  text-align: center;
  padding: 120px 24px 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 200, 255, 0.08);
  border: 1px solid rgba(0, 200, 255, 0.2);
  border-radius: 100px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 32px;
  animation: fadeInDown 0.8s ease;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: #fff;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
}

.stat-plus {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
  animation: fadeIn 1s ease 1s both;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--primary), transparent);
  animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.scroll-indicator span {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font);
}

.btn-primary {
  background: var(--gradient);
  color: #000;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 200, 255, 0.3);
  color: #000;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid rgba(0, 200, 255, 0.3);
  padding: 10px 24px;
  font-size: 14px;
}

.btn-outline:hover {
  background: rgba(0, 200, 255, 0.08);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ===== Section Common ===== */
.section {
  position: relative;
  z-index: 1;
  padding: 120px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary);
  background: rgba(0, 200, 255, 0.08);
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(0, 200, 255, 0.15);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.about-card {
  padding: 32px;
  text-align: center;
}

.about-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: 14px;
  color: var(--primary);
}

.about-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.about-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Solutions Section ===== */
.solutions {
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--surface) 50%, var(--bg-dark) 100%);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

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

.solution-card:hover {
  border-color: rgba(0, 200, 255, 0.15);
  transform: translateY(-4px);
  box-shadow: var(--shadow), var(--shadow-glow);
}

.solution-image {
  position: relative;
  height: 240px;
  background: linear-gradient(135deg, #0d1520, #152030);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow: hidden;
}

.solution-image img {
  max-height: 200px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4));
  transition: var(--transition);
}

.solution-card:hover .solution-image img {
  transform: scale(1.05);
}

.solution-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  background: var(--gradient);
  color: #000;
  font-size: 12px;
  font-weight: 700;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.solution-content {
  padding: 28px;
}

.solution-category {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 8px;
}

.solution-content h3 {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.solution-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.solution-features {
  list-style: none;
  margin-bottom: 24px;
}

.solution-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
  padding: 6px 0;
}

.solution-features li svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* ===== Products Section ===== */
.product-category-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.tab-btn.active {
  background: rgba(0, 200, 255, 0.1);
  border-color: rgba(0, 200, 255, 0.3);
  color: var(--primary);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-content.active {
  display: block;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  padding: 24px;
  text-align: center;
}

.product-card img {
  width: 100%;
  height: 160px;
  object-fit: contain;
  margin-bottom: 16px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
}

.product-placeholder {
  width: 100%;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  color: var(--text-dim);
}

.product-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.product-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== Solar Oasis Section ===== */
.solar {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1a12 50%, var(--bg-dark) 100%);
  overflow: hidden;
}

.solar-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(0, 255, 136, 0.06) 0%, transparent 60%);
}

.solar-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.solar-text h2 {
  text-align: left;
}

.solar-text > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.solar-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 32px;
}

.solar-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: 10px;
  color: var(--accent);
  flex-shrink: 0;
}

.solar-feature h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.solar-feature p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.solar-models {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.model-chip {
  padding: 6px 16px;
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: 100px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}

/* Solar Diagram */
.solar-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.solar-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.diagram-node {
  width: 120px;
  height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 50%;
  border: 2px solid;
  transition: var(--transition);
}

.diagram-node span {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.diagram-node.sun {
  border-color: rgba(255, 200, 0, 0.3);
  background: rgba(255, 200, 0, 0.05);
  color: #ffc800;
}

.diagram-node.battery {
  border-color: rgba(0, 200, 255, 0.3);
  background: rgba(0, 200, 255, 0.05);
  color: var(--primary);
}

.diagram-node.ro {
  border-color: rgba(0, 255, 136, 0.3);
  background: rgba(0, 255, 136, 0.05);
  color: var(--accent);
}

.diagram-node.water {
  border-color: rgba(100, 180, 255, 0.3);
  background: rgba(100, 180, 255, 0.05);
  color: #64b4ff;
}

.diagram-line {
  width: 2px;
  height: 32px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  opacity: 0.4;
  animation: flowDown 2s infinite;
}

@keyframes flowDown {
  0% { opacity: 0.2; }
  50% { opacity: 0.8; }
  100% { opacity: 0.2; }
}

.diagram-line.line-1 { animation-delay: 0s; }
.diagram-line.line-2 { animation-delay: 0.5s; }
.diagram-line.line-3 { animation-delay: 1s; }

/* ===== CTA Section ===== */
.cta-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
  padding: 64px;
  background: linear-gradient(135deg, rgba(0, 200, 255, 0.06) 0%, rgba(0, 255, 136, 0.04) 100%);
  border: 1px solid rgba(0, 200, 255, 0.12);
  border-radius: var(--radius-lg);
}

.cta-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.cta-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.cta-chip {
  padding: 6px 16px;
  background: rgba(0, 200, 255, 0.06);
  border: 1px solid rgba(0, 200, 255, 0.12);
  border-radius: 100px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}

.cta-stat-ring {
  position: relative;
  width: 200px;
  height: 200px;
}

.ring-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-progress {
  animation: ringFill 2s ease-out forwards;
}

@keyframes ringFill {
  from { stroke-dashoffset: 565.48; }
  to { stroke-dashoffset: 141.37; }
}

.ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.ring-number {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
}

.ring-label {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ===== Contact Section ===== */
.contact {
  background: linear-gradient(180deg, var(--bg-dark), var(--surface));
}

.contact-grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  align-items: flex-start;
}

.contact-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: 10px;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-card h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.contact-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.contact-form {
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: rgba(0, 200, 255, 0.4);
  box-shadow: 0 0 0 3px rgba(0, 200, 255, 0.08);
}

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

.form-group select option {
  background: var(--bg-card);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 1;
  padding: 80px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin-bottom: 12px;
  filter: drop-shadow(0 0 8px rgba(0, 200, 255, 0.2));
}

.footer-tagline {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .solar-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .solar-visual {
    order: -1;
  }
  .solar-diagram {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  .diagram-line {
    width: 32px;
    height: 2px;
  }
  .cta-card {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    z-index: 999;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    font-size: 20px;
    padding: 12px 32px;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .hero-content {
    padding: 100px 16px 60px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-category-tabs {
    gap: 6px;
  }

  .tab-btn {
    padding: 8px 16px;
    font-size: 13px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .cta-card {
    padding: 32px 24px;
  }

  .cta-stat-ring {
    margin: 0 auto;
  }

  .section {
    padding: 80px 0;
  }

  .solar-diagram {
    flex-direction: column;
  }

  .diagram-line {
    width: 2px;
    height: 24px;
  }

  .diagram-node {
    width: 100px;
    height: 100px;
  }

  .diagram-node svg {
    width: 28px;
    height: 28px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .section-title {
    font-size: 28px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }
}