/* ============================================================
   Envitek — style.css
   Dark-themed, electric-blue accent, mobile-first responsive
   ============================================================ */

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

:root {
  /* Palette */
  --bg-900:        #080d17;
  --bg-800:        #0c1423;
  --bg-700:        #101c30;
  --bg-600:        #152340;
  --surface:       #172138;
  --surface-hover: #1e2e4f;

  --accent:        #00b4ff;
  --accent-bright: #00d4ff;
  --accent-glow:   rgba(0, 180, 255, 0.18);
  --accent-border: rgba(0, 180, 255, 0.30);

  --cyan:          #00e5c8;
  --purple:        #7c5cfc;

  --text-primary:  #e8f0fe;
  --text-secondary:#8da4c4;
  --text-muted:    #4e6483;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

  /* Spacing */
  --section-pad: 6rem 0;
  --container-max: 1180px;
  --radius: 12px;
  --radius-lg: 20px;

  /* Transitions */
  --transition: 0.25s ease;
  --transition-slow: 0.5s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-900);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin-top: 0.85rem;
}

.text-accent { color: var(--accent); }
.text-cyan   { color: var(--cyan); }

/* Gradient text utility */
.gradient-text {
  background: linear-gradient(135deg, var(--text-primary) 20%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Fade-in on scroll */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-900); }
::-webkit-scrollbar-thumb { background: var(--bg-600); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-border); }

/* ============================================================
   NAVIGATION
   ============================================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 1.5rem;
  height: 68px;
  display: flex;
  align-items: center;
  transition: background var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(8, 13, 23, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(0,180,255,0.12);
}

.nav-inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.nav-logo-img {
  height: 40px;
  width: auto;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.nav-logo-wordmark {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.nav-logo-sub {
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0;
}

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

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.45rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

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

/* Nav CTA */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.88rem;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  color: var(--bg-900);
}
.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,180,255,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent-border);
}
.btn-outline:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.07);
}
.btn-ghost:hover {
  background: var(--surface-hover);
  transform: translateY(-1px);
}

.btn-lg {
  font-size: 1rem;
  padding: 0.85rem 1.75rem;
  border-radius: 10px;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
@media (max-width: 820px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(8, 13, 23, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.25rem;
    border-bottom: 1px solid rgba(0,180,255,0.12);
    transform: translateY(-110%);
    transition: transform var(--transition);
    z-index: 999;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a {
    font-size: 1rem;
    padding: 0.7rem 1rem;
  }
  .nav-cta { display: none; }
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 1.5rem 80px;
  position: relative;
  overflow: hidden;
}

/* Background grid */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,180,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,180,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* Glow orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.35;
}
.hero-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,180,255,0.45) 0%, transparent 70%);
  top: -150px;
  right: -120px;
}
.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0,229,200,0.3) 0%, transparent 70%);
  bottom: 0;
  left: -100px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  border-radius: 100px;
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1.75rem;
  letter-spacing: 0.04em;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 1.8s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 1.5rem;
}

.hero-title .line-accent {
  background: linear-gradient(90deg, var(--accent) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
}

.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-weight: 500;
}

/* ============================================================
   ABOUT
   ============================================================ */
#about {
  padding: var(--section-pad);
  position: relative;
  overflow: hidden;
}

/* Purple glow — upper-left of About */
#about::before {
  content: '';
  position: absolute;
  top: -120px;
  left: -180px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(124,92,252,0.09) 0%, transparent 65%);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
}

.about-icon-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.about-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-icon-box.blue  { background: rgba(0,180,255,0.12); color: var(--accent); }
.about-icon-box.cyan  { background: rgba(0,229,200,0.1);  color: var(--cyan); }
.about-icon-box.purple{ background: rgba(124,92,252,0.12); color: var(--purple); }

.about-mission {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.about-mission strong {
  color: var(--text-primary);
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 2rem;
}

.about-value-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.check-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}

.about-value-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.about-value-text strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ============================================================
   COVLY.AI SECTION
   ============================================================ */
#covly {
  padding: var(--section-pad);
  background: linear-gradient(180deg, transparent 0%, var(--bg-800) 30%, var(--bg-800) 70%, transparent 100%);
  position: relative;
  overflow: hidden;
}

#covly::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(0,180,255,0.06) 0%, transparent 65%);
  pointer-events: none;
}

.covly-header {
  text-align: center;
  margin-bottom: 4rem;
}

.covly-header .section-subtitle {
  margin: 0.85rem auto 0;
}

/* Product mockup area */
.covly-mockup-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 4rem;
}

.covly-mockup {
  width: 100%;
  max-width: 860px;
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 40px 100px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,180,255,0.08);
  position: relative;
}

/* Window chrome */
.covly-window-bar {
  background: var(--bg-600);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.window-dot.red    { background: #ff5f57; }
.window-dot.yellow { background: #febc2e; }
.window-dot.green  { background: #28c840; }

.window-url {
  margin-left: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-700);
  padding: 0.25rem 0.75rem;
  border-radius: 5px;
  flex: 1;
  max-width: 280px;
}

/* App UI simulation */
.covly-app {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 340px;
}

.covly-sidebar {
  background: var(--bg-700);
  padding: 1.25rem;
  border-right: 1px solid rgba(255,255,255,0.05);
}

.sidebar-logo {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.sidebar-section-label {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  font-weight: 600;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.15rem;
  cursor: default;
  transition: background var(--transition);
}

.sidebar-item.active {
  background: var(--accent-glow);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.covly-main {
  padding: 1.5rem;
}

.covly-main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.covly-main-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
}

.tag-blue   { background: rgba(0,180,255,0.12); color: var(--accent); }
.tag-green  { background: rgba(0,229,200,0.1);  color: var(--cyan); }
.tag-purple { background: rgba(124,92,252,0.12); color: var(--purple); }
.tag-orange { background: rgba(255,166,0,0.12); color: #ffa600; }

/* Task rows */
.task-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.task-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: var(--bg-700);
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.04);
  font-size: 0.8rem;
}

.task-check {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.task-check.done {
  background: var(--accent);
  color: var(--bg-900);
}

.task-check.pending {
  border: 1.5px solid var(--text-muted);
}

.task-name {
  flex: 1;
  color: var(--text-secondary);
}

.task-name.done-text {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* Progress bar */
.progress-bar-wrap {
  margin-top: 1.25rem;
  background: var(--bg-600);
  border-radius: 100px;
  height: 5px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  width: 72%;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

@media (max-width: 600px) {
  .covly-app { grid-template-columns: 1fr; }
  .covly-sidebar { display: none; }
}

/* Feature cards */
.covly-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25), 0 0 0 1px var(--accent-border);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  font-size: 1.2rem;
}

.feature-icon.blue   { background: rgba(0,180,255,0.12); color: var(--accent); }
.feature-icon.cyan   { background: rgba(0,229,200,0.1);  color: var(--cyan); }
.feature-icon.purple { background: rgba(124,92,252,0.12); color: var(--purple); }

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Platform badges */
.covly-platforms {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition);
}

.platform-badge:hover {
  border-color: var(--accent-border);
  background: var(--accent-glow);
  color: var(--accent);
  transform: translateY(-2px);
}

.platform-badge svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 820px) {
  .covly-features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .covly-features { grid-template-columns: 1fr; }
}

/* ============================================================
   AWS SERVICES
   ============================================================ */
#aws, #services {
  padding: var(--section-pad);
  position: relative;
  overflow: hidden;
}

/* Blue glow — upper-right of Services */
#services::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -200px;
  width: 750px;
  height: 750px;
  background: radial-gradient(circle, rgba(0,180,255,0.07) 0%, transparent 65%);
  pointer-events: none;
}

.aws-header {
  margin-bottom: 3.5rem;
}

.aws-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.aws-card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.aws-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.aws-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.aws-card:hover::after {
  transform: scaleX(1);
}

.aws-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.aws-card-icon.purple {
  background: rgba(124,92,252,0.12);
  color: var(--purple);
  border-color: rgba(124,92,252,0.28);
}

.aws-card-icon.cyan {
  background: rgba(0,229,200,0.1);
  color: var(--cyan);
  border-color: rgba(0,229,200,0.25);
}

.aws-card-icon svg {
  width: 24px;
  height: 24px;
}

.aws-card-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
}

.aws-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.aws-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.aws-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.aws-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.aws-bullets li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 0.5rem;
}

@media (max-width: 900px) {
  .aws-cards { grid-template-columns: 1fr; max-width: 480px; }
}

/* ============================================================
   WHY ENVITEK
   ============================================================ */
#why {
  padding: var(--section-pad);
  background: linear-gradient(180deg, transparent 0%, var(--bg-800) 20%, var(--bg-800) 80%, transparent 100%);
}

.why-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.why-header .section-subtitle {
  margin: 0.85rem auto 0;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.why-tile {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
}

.why-tile:hover {
  border-color: var(--accent-border);
  background: var(--surface-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,180,255,0.08), 0 0 0 1px var(--accent-border);
}

.why-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.why-icon.blue   { background: linear-gradient(135deg, rgba(0,180,255,0.18), rgba(0,180,255,0.05)); color: var(--accent); }
.why-icon.cyan   { background: linear-gradient(135deg, rgba(0,229,200,0.18), rgba(0,229,200,0.04)); color: var(--cyan); }
.why-icon.purple { background: linear-gradient(135deg, rgba(124,92,252,0.20), rgba(124,92,252,0.05)); color: var(--purple); }
.why-icon.orange { background: linear-gradient(135deg, rgba(255,166,0,0.18), rgba(255,166,0,0.04)); color: #ffa600; }

.why-tile-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.why-tile-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .why-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .why-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   CONTACT
   ============================================================ */
#contact {
  padding: var(--section-pad);
  position: relative;
  overflow: hidden;
}

/* Purple glow — lower-left of Contact */
#contact::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -150px;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(124,92,252,0.08) 0%, transparent 65%);
  pointer-events: none;
}

/* Accent glow — upper-right of Contact */
#contact::after {
  content: '';
  position: absolute;
  top: -50px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,180,255,0.05) 0%, transparent 65%);
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.contact-detail-icon svg {
  width: 18px;
  height: 18px;
}

.contact-detail-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.contact-detail-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-detail-value a {
  color: var(--accent);
  text-decoration: none;
}
.contact-detail-value a:hover {
  text-decoration: underline;
}

/* Form */
.contact-form-wrap {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.contact-form-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
}

.form-group {
  margin-bottom: 1.25rem;
}

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

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
}

input, textarea, select {
  width: 100%;
  background: var(--bg-700);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

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

input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

select option {
  background: var(--bg-700);
}

.form-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.submit-btn {
  width: 100%;
  margin-top: 0.5rem;
  justify-content: center;
  font-size: 0.95rem;
  padding: 0.9rem 1.5rem;
}

/* Form success/error states */
.form-feedback {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  margin-top: 1rem;
}
.form-feedback.success {
  background: rgba(0,229,200,0.1);
  border: 1px solid rgba(0,229,200,0.25);
  color: var(--cyan);
  display: flex;
}
.form-feedback.error {
  background: rgba(255,100,100,0.1);
  border: 1px solid rgba(255,100,100,0.25);
  color: #ff8080;
  display: flex;
}

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .form-row { grid-template-columns: 1fr; }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--bg-800);
  border-top: none;
  padding: 3.5rem 1.5rem 2rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--cyan), var(--purple), transparent);
  opacity: 0.4;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  margin-bottom: 2rem;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 280px;
}

.footer-col-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-bottom-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-bottom-links a:hover {
  color: var(--text-secondary);
}

@media (max-width: 820px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   SECTION DIVIDERS
   ============================================================ */
/* ============================================================
   APPROACH STEPS
   ============================================================ */
/* Cyan glow — center of Approach */
#approach {
  position: relative;
  overflow: hidden;
}
#approach::before {
  content: '';
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(0,229,200,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.approach-steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: start;
  margin-top: 4rem;
}

.approach-step {
  background: var(--surface);
  border: 1px solid rgba(0,180,255,0.12);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: border-color var(--transition), background var(--transition);
}

.approach-step:hover {
  border-color: var(--accent-border);
  background: var(--surface-hover);
}

.approach-step-num {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent) 0%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 1rem;
  letter-spacing: -0.04em;
}

.approach-step-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.approach-step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.approach-step-connector {
  width: 3rem;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-border), transparent);
  align-self: center;
  margin-top: -2rem;
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .approach-steps {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .approach-step-connector { display: none; }
}

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

.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,180,255,0.15), transparent);
  margin: 0;
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 500;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

/* ============================================================
   RESPONSIVE TWEAKS
   ============================================================ */
@media (max-width: 540px) {
  .hero-title { letter-spacing: -0.03em; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn-lg { width: 100%; justify-content: center; }
}