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

:root {
  --bg-deep: #050814;
  --bg-mid: #0a1628;
  --bg-card: rgba(18, 30, 52, 0.55);
  --bg-card-strong: rgba(22, 36, 60, 0.8);
  --border-glass: rgba(79, 195, 247, 0.18);
  --border-glass-hover: rgba(79, 195, 247, 0.4);

  --cyan: #4fc3f7;
  --cyan-bright: #00e5ff;
  --teal: #26c6da;
  --blue: #2962ff;
  --indigo: #536dfe;

  --orange: #ff8a65;
  --orange-hot: #ff6b35;
  --amber: #ffb74d;
  --red-warm: #ff5252;

  --text: #e8eef7;
  --text-dim: #a8b5c8;
  --text-muted: #7d8ba0;
  --text-bright: #ffffff;

  --gradient-hero: linear-gradient(135deg, #4fc3f7 0%, #536dfe 50%, #ff8a65 100%);
  --gradient-accent: linear-gradient(135deg, #00e5ff, #2962ff);
  --gradient-warm: linear-gradient(135deg, #ffb74d, #ff5252);
  --gradient-glass: linear-gradient(135deg, rgba(79,195,247,0.08), rgba(255,138,101,0.05));

  --shadow-soft: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(79, 195, 247, 0.3);
  --shadow-warm: 0 0 60px rgba(255, 107, 53, 0.2);

  --radius: 18px;
  --radius-sm: 10px;
  --radius-lg: 28px;

  --max-width: 1280px;
  --content-width: 820px;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-deep);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background layers */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(79, 195, 247, 0.12), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(255, 107, 53, 0.08), transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(41, 98, 255, 0.06), transparent 60%);
  z-index: -3;
  pointer-events: none;
}

#particleCanvas {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: 0.55;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(79, 195, 247, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 195, 247, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.8), transparent 70%);
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
}
.bg-glow-1 { width: 500px; height: 500px; background: #4fc3f7; top: -150px; left: -150px; animation: float-glow 18s ease-in-out infinite; }
.bg-glow-2 { width: 400px; height: 400px; background: #ff8a65; bottom: -100px; right: -100px; animation: float-glow 22s ease-in-out infinite reverse; }
.bg-glow-3 { width: 350px; height: 350px; background: #536dfe; top: 40%; right: 20%; animation: float-glow 25s ease-in-out infinite; }

@keyframes float-glow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(80px, 40px) scale(1.15); }
  66% { transform: translate(-40px, 80px) scale(0.9); }
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-bright);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.1rem, 5vw, 3.8rem); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.6rem); margin-bottom: 0.5em; }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.55rem); margin-bottom: 0.6em; }
h4 { font-size: 1rem; margin-bottom: 1em; text-transform: uppercase; letter-spacing: 0.08em; color: var(--cyan); }

p { margin-bottom: 1.1em; color: var(--text-dim); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.25s ease, text-shadow 0.25s ease;
  border-bottom: 1px solid transparent;
}
a:hover { color: var(--cyan-bright); text-shadow: 0 0 10px rgba(79, 195, 247, 0.4); border-bottom-color: var(--cyan-bright); }
a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }

strong { color: var(--text-bright); font-weight: 600; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* ===== READING PROGRESS ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--gradient-hero);
  z-index: 9999;
  box-shadow: 0 0 10px var(--cyan);
  transition: width 0.1s linear;
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(5, 8, 20, 0.6);
  border-bottom: 1px solid rgba(79, 195, 247, 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.nav.scrolled {
  background: rgba(5, 8, 20, 0.85);
  box-shadow: 0 10px 40px -15px rgba(0, 0, 0, 0.6);
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: none;
}
.logo-circle {
  width: 44px;
  height: 44px;
  position: relative;
  filter: drop-shadow(0 0 12px rgba(79, 195, 247, 0.4));
}
.logo-svg { width: 100%; height: 100%; display: block; }
.logo-ring { transform-origin: center; animation: spin-slow 12s linear infinite; }
@keyframes spin-slow { to { transform: rotate(360deg); } }
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 0.02em;
}

.nav-links { display: flex; align-items: center; gap: 0.5rem; }
.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: 10px;
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: none;
  transition: all 0.25s ease;
}
.nav-links a:hover { color: var(--text-bright); background: rgba(79, 195, 247, 0.1); text-shadow: none; }
.nav-cta {
  background: var(--gradient-accent) !important;
  color: var(--text-bright) !important;
  padding: 0.55rem 1.2rem !important;
  box-shadow: 0 4px 20px -4px rgba(79, 195, 247, 0.5);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 25px -4px rgba(79, 195, 247, 0.7) !important; background: var(--gradient-accent) !important; }

@media (max-width: 768px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: 10rem 0 6rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}
.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.25);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--cyan);
  margin-bottom: 1.75rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 10px #4ade80;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.6; transform: scale(1.3); } }

.hero-title {
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #e8eef7 40%, #4fc3f7 80%, #ff8a65 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 80px rgba(79, 195, 247, 0.3);
}
.hero-lead {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--text);
  max-width: 580px;
  margin-bottom: 2rem;
  line-height: 1.75;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.meta-item { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--text-dim); }

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  border: none;
  border-bottom: none;
  transition: transform 0.25s ease, box-shadow 0.3s ease, background 0.3s ease;
  white-space: nowrap;
}
.btn svg { flex-shrink: 0; }
.btn-primary {
  background: var(--gradient-accent);
  color: var(--text-bright);
  box-shadow: 0 10px 30px -8px rgba(0, 229, 255, 0.5);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #00e5ff, #ff8a65);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.btn-primary > * { position: relative; z-index: 1; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 15px 40px -8px rgba(0, 229, 255, 0.7); }
.btn-primary:hover::before { opacity: 1; }
.btn-ghost {
  background: rgba(79, 195, 247, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(79, 195, 247, 0.3);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { background: rgba(79, 195, 247, 0.15); transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(79, 195, 247, 0.4); color: var(--cyan-bright); }

/* Hero scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.scroll-arrow {
  width: 18px; height: 18px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: bounce-arrow 2s ease-in-out infinite;
}
@keyframes bounce-arrow { 0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.5; } 50% { transform: rotate(45deg) translate(4px, 4px); opacity: 1; } }

/* ===== DRYER 3D VISUAL ===== */
.hero-visual {
  position: relative;
  perspective: 1200px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 500px;
}
.dryer-3d {
  position: relative;
  width: 380px;
  height: 460px;
  transform-style: preserve-3d;
  animation: float-dryer 6s ease-in-out infinite;
}
@keyframes float-dryer {
  0%, 100% { transform: translateY(0) rotateX(5deg) rotateY(-5deg); }
  50% { transform: translateY(-20px) rotateX(5deg) rotateY(-5deg); }
}

.dryer-body {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #2a3852 0%, #1a2438 100%);
  border-radius: 20px;
  box-shadow:
    0 30px 80px -20px rgba(0, 0, 0, 0.8),
    0 0 60px rgba(79, 195, 247, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.dryer-panel-top {
  height: 40px;
  background: linear-gradient(180deg, #34466a 0%, #1f2d48 100%);
  border-radius: 8px;
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
}
.dryer-panel-top::before, .dryer-panel-top::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  border-radius: 50%;
  background: radial-gradient(circle, #4fc3f7 0%, #1a4e6e 70%, #0a1628 100%);
  box-shadow: 0 0 8px rgba(79, 195, 247, 0.6);
}
.dryer-panel-top::before { left: 20px; }
.dryer-panel-top::after { left: 50px; background: radial-gradient(circle, #ff8a65 0%, #6e331a 70%, #2a0a00 100%); box-shadow: 0 0 8px rgba(255, 138, 101, 0.6); }

.dryer-display {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(79, 195, 247, 0.3);
  border-radius: 6px;
  padding: 0.5rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Courier New', monospace;
}
.display-temp {
  color: var(--cyan-bright);
  font-weight: 700;
  font-size: 1.1rem;
  text-shadow: 0 0 10px var(--cyan);
}
.display-label {
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.dryer-door {
  flex: 1;
  background: radial-gradient(circle at center, #0a1420 0%, #1a2438 100%);
  border-radius: 50%;
  border: 8px solid #34466a;
  box-shadow:
    inset 0 0 40px rgba(0, 0, 0, 0.8),
    0 0 30px rgba(79, 195, 247, 0.2);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.drum {
  width: 85%;
  height: 85%;
  position: relative;
  border-radius: 50%;
  animation: spin-drum 3s linear infinite;
  background: radial-gradient(circle, rgba(79, 195, 247, 0.1) 0%, transparent 60%);
}
@keyframes spin-drum { to { transform: rotate(360deg); } }

.drum-fin {
  position: absolute;
  left: 50%;
  top: 10%;
  width: 8%;
  height: 80%;
  background: linear-gradient(90deg, transparent, rgba(79, 195, 247, 0.3), transparent);
  transform-origin: center center;
  border-radius: 2px;
}
.drum-fin-1 { transform: translateX(-50%) rotate(0deg); }
.drum-fin-2 { transform: translateX(-50%) rotate(45deg); }
.drum-fin-3 { transform: translateX(-50%) rotate(90deg); }
.drum-fin-4 { transform: translateX(-50%) rotate(135deg); }
.drum-center {
  position: absolute;
  top: 50%; left: 50%;
  width: 20%; height: 20%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, #4fc3f7 0%, #1a4e6e 70%, #0a1628 100%);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(79, 195, 247, 0.8);
}

.dryer-panel-bottom {
  height: 30px;
  background: linear-gradient(180deg, #1f2d48 0%, #151e32 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 0 14px;
}
.vent {
  width: 14px; height: 14px;
  background: linear-gradient(135deg, #0a1628, #000);
  border-radius: 3px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.8);
}

.heat-wave {
  position: absolute;
  right: -60px;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--orange-hot), transparent);
  border-radius: 4px;
  filter: blur(2px);
  opacity: 0;
  animation: heat-flow 2s ease-out infinite;
}
.heat-wave-1 { top: 40%; animation-delay: 0s; }
.heat-wave-2 { top: 55%; animation-delay: 0.5s; }
.heat-wave-3 { top: 70%; animation-delay: 1s; }

@keyframes heat-flow {
  0% { opacity: 0; transform: translateX(0) scaleX(0.3); }
  30% { opacity: 0.8; }
  100% { opacity: 0; transform: translateX(120px) scaleX(1); }
}

.floating-lint {
  position: absolute;
  width: 6px; height: 6px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  filter: blur(1px);
  animation: float-lint 4s ease-in-out infinite;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
}
.lint-1 { top: 20%; left: -30px; animation-delay: 0s; }
.lint-2 { top: 40%; left: -50px; animation-delay: 0.8s; }
.lint-3 { top: 60%; left: -20px; animation-delay: 1.5s; }
.lint-4 { top: 80%; left: -40px; animation-delay: 2.2s; }
.lint-5 { top: 30%; right: -60px; left: auto; animation-delay: 0.4s; animation-name: float-lint-r; }
.lint-6 { top: 65%; right: -30px; left: auto; animation-delay: 1.2s; animation-name: float-lint-r; }

@keyframes float-lint {
  0% { transform: translate(0, 0) scale(0.5); opacity: 0; }
  50% { transform: translate(30px, -40px) scale(1); opacity: 0.9; }
  100% { transform: translate(60px, -80px) scale(0.3); opacity: 0; }
}
@keyframes float-lint-r {
  0% { transform: translate(0, 0) scale(0.5); opacity: 0; }
  50% { transform: translate(-30px, -40px) scale(1); opacity: 0.9; }
  100% { transform: translate(-60px, -80px) scale(0.3); opacity: 0; }
}

/* ===== SECTIONS ===== */
.article { position: relative; z-index: 2; }
.section { padding: 5rem 0; position: relative; }
.section-alt {
  background: linear-gradient(180deg, rgba(10, 22, 40, 0.4), rgba(5, 8, 20, 0.2));
  border-top: 1px solid rgba(79, 195, 247, 0.05);
  border-bottom: 1px solid rgba(79, 195, 247, 0.05);
}
.section-header { text-align: center; max-width: 720px; margin: 0 auto 3rem; }
.section-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.2);
  border-radius: 100px;
  color: var(--cyan);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
  font-family: var(--font-display);
}
.section-lead { font-size: 1.05rem; color: var(--text); }

/* Glass cards */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
  box-shadow: var(--shadow-soft);
}
.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glass);
  opacity: 0.5;
  pointer-events: none;
}
.glass-card > * { position: relative; z-index: 1; }
.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass-hover);
  box-shadow: 0 20px 60px -15px rgba(0, 0, 0, 0.7), 0 0 40px rgba(79, 195, 247, 0.1);
}

/* Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { min-height: 400px; }
  .dryer-3d { width: 300px; height: 380px; }
}

/* Problem cards */
.problem-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  position: relative;
  overflow: hidden;
  transition: all 0.4s ease;
}
.problem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}
.problem-card:hover { transform: translateY(-6px); border-color: var(--border-glass-hover); }
.problem-card:hover::before { transform: scaleX(1); }
.problem-icon {
  width: 72px; height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.2);
  border-radius: 16px;
  margin-bottom: 1.25rem;
  transition: transform 0.4s ease;
}
.problem-card:hover .problem-icon { transform: scale(1.08) rotate(-3deg); }

/* Process steps */
.process-steps {
  max-width: 820px;
  margin: 0 auto;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, rgba(79, 195, 247, 0.3), transparent);
}
.step {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  position: relative;
}
.step-num {
  flex-shrink: 0;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0a1628, #1a2438);
  border: 2px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(79, 195, 247, 0.3);
  position: relative;
  z-index: 1;
}
.step-content {
  flex: 1;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 1.75rem;
}

/* Tip cards */
.tip-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  position: relative;
  transition: all 0.4s ease;
}
.tip-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 0.75rem;
}
.tip-card:hover { transform: translateY(-4px); border-color: var(--border-glass-hover); }

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
@media (max-width: 900px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  transition: transform 0.4s ease;
}
.stat-card:hover { transform: translateY(-4px); border-color: var(--border-glass-hover); }
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}
.stat-label { color: var(--text-dim); font-size: 0.9rem; line-height: 1.4; }

/* FAQ */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.faq-item[open] { border-color: var(--border-glass-hover); }
.faq-item summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-bright);
  font-size: 1.05rem;
  transition: background 0.3s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: rgba(79, 195, 247, 0.05); }
.faq-toggle {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(79, 195, 247, 0.1);
  border: 1px solid rgba(79, 195, 247, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  font-weight: 700;
  font-size: 1.1rem;
  transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item[open] .faq-toggle { transform: rotate(45deg); background: var(--cyan); color: var(--bg-deep); }
.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-dim);
  line-height: 1.75;
}

/* CTA section */
.cta-section { padding: 6rem 0; }
.cta-card {
  position: relative;
  padding: 4rem 2rem;
  text-align: center;
  background: linear-gradient(135deg, rgba(79, 195, 247, 0.12), rgba(255, 138, 101, 0.08));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass-hover);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 80px -20px rgba(79, 195, 247, 0.3);
}
.cta-glow {
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, rgba(79, 195, 247, 0.3), transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}
.cta-card h2 {
  position: relative; z-index: 1;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}
.cta-card p {
  position: relative; z-index: 1;
  max-width: 600px;
  margin: 0 auto 2rem;
  color: var(--text);
}
.cta-buttons {
  position: relative; z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* Footer */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(79, 195, 247, 0.1);
  background: linear-gradient(180deg, transparent, rgba(5, 8, 20, 0.8));
  position: relative;
  z-index: 2;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.6rem; color: var(--text-dim); font-size: 0.95rem; }
.footer-col li a { color: var(--text-dim); border-bottom: none; }
.footer-col li a:hover { color: var(--cyan); }
.footer-brand p { margin-top: 1rem; font-size: 0.95rem; }
.socials { display: flex; gap: 0.75rem; margin-top: 0.5rem; }
.social-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  transition: all 0.3s ease;
  border-bottom: none;
}
.social-icon:hover {
  background: var(--cyan);
  color: var(--bg-deep);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px -5px rgba(79, 195, 247, 0.5);
  border-bottom: none;
}
.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(79, 195, 247, 0.08);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: var(--text-bright);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px -8px rgba(0, 229, 255, 0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px) scale(1.05); }

/* Scroll animations */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up[data-delay="100"] { transition-delay: 0.1s; }
.fade-up[data-delay="200"] { transition-delay: 0.2s; }
.fade-up[data-delay="300"] { transition-delay: 0.3s; }
.fade-up[data-delay="400"] { transition-delay: 0.4s; }
.fade-up[data-delay="500"] { transition-delay: 0.5s; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .fade-up { opacity: 1; transform: none; }
  #particleCanvas { display: none; }
  .bg-glow { animation: none; }
}

/* Mobile adjustments */
@media (max-width: 600px) {
  .hero { padding: 7rem 0 3rem; min-height: auto; }
  .section { padding: 3rem 0; }
  .glass-card, .problem-card, .tip-card, .stat-card { padding: 1.5rem; }
  .cta-card { padding: 2.5rem 1.25rem; }
  .btn { padding: 0.8rem 1.2rem; font-size: 0.9rem; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .process-steps::before { left: 18px; }
  .step-num { width: 42px; height: 42px; font-size: 1rem; }
  .step { gap: 1rem; }
  .step-content { padding: 1.25rem; }
  .back-to-top { bottom: 1.25rem; right: 1.25rem; width: 44px; height: 44px; }
}