/* ===== Custom Properties ===== */
:root {
  --color-bg-dark: #0f172a;
  --color-bg-darker: #0b1120;
  --color-bg-light: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-on-dark: #e2e8f0;
  --color-text-muted-dark: #94a3b8;
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-accent: #a855f7;
  --color-gradient: linear-gradient(135deg, #6366f1, #a855f7);
  --color-gradient-hover: linear-gradient(135deg, #4f46e5, #9333ea);
  --color-border: #e2e8f0;
  --color-border-dark: #1e293b;
  --color-success: #22c55e;
  --color-whatsapp: #25d366;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --transition: 0.3s ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-light);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }

/* ===== Utilities ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

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

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

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--color-text-light);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-gradient);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-gradient-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}
.btn--outline {
  background: transparent;
  color: var(--color-text-on-dark);
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn--outline:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.05);
}
.btn--white {
  background: #fff;
  color: var(--color-primary);
}
.btn--white:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255,255,255,0.3);
}
.btn--lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--transition);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav__logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav__links {
  display: flex;
  gap: 36px;
}
.nav__links a {
  color: var(--color-text-muted-dark);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav__links a:hover { color: #fff; }
.nav__cta { display: block; }
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  background: var(--color-bg-dark);
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 24px;
}
.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--color-text-muted-dark);
  margin-bottom: 40px;
  line-height: 1.7;
  max-width: 520px;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero__illustration {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

/* Voice wave animations */
.voice-waves .wave {
  animation: waveMove 1.5s ease-in-out infinite alternate;
}
.wave--1 { animation-delay: 0s; }
.wave--2 { animation-delay: 0.15s; }
.wave--3 { animation-delay: 0.3s; }
@keyframes waveMove {
  0% { opacity: 0.3; transform: scaleY(0.8); }
  100% { opacity: 1; transform: scaleY(1.2); }
}
.ai-pulse {
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; r: 20; }
  50% { opacity: 0.7; r: 24; }
}

/* ===== Social Proof ===== */
.social-proof {
  background: var(--color-bg-darker);
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.social-proof__label {
  text-align: center;
  color: var(--color-text-muted-dark);
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}
.social-proof__logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.social-proof__badge {
  padding: 8px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px;
  color: var(--color-text-muted-dark);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== Features ===== */
.features {
  padding: 120px 0;
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-light);
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.feature-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(168,85,247,0.1));
  color: var(--color-primary);
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== How it Works ===== */
.how-it-works {
  padding: 120px 0;
  background: var(--color-bg-alt);
}
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
}
.steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: var(--color-gradient);
  opacity: 0.3;
}
.step {
  text-align: center;
  position: relative;
}
.step__number {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: var(--color-gradient);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
  position: relative;
  z-index: 1;
}
.step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.step p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  max-width: 240px;
  margin: 0 auto;
}

/* ===== Stats ===== */
.stats {
  padding: 100px 0;
  background: var(--color-bg-dark);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat__number {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat__suffix {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat__label {
  color: var(--color-text-muted-dark);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* ===== Why Vetrix ===== */
.why-vetrix {
  padding: 120px 0;
}
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}
.comparison__card {
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-light);
}
.comparison__card--highlight {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(99,102,241,0.03), rgba(168,85,247,0.03));
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
}
.comparison__header {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
}
.comparison__header--old { color: var(--color-text-light); }
.comparison__header--new {
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-bottom-color: var(--color-primary);
}
.comparison__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.comparison__list li {
  font-size: 0.95rem;
  color: var(--color-text);
  padding-left: 28px;
  position: relative;
}
.comparison__card:not(.comparison__card--highlight) .comparison__list li::before {
  content: '✕';
  position: absolute;
  left: 0;
  color: #ef4444;
  font-weight: 700;
}
.comparison__card--highlight .comparison__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}
.comparison__cost {
  font-weight: 700;
  color: #ef4444;
}
.comparison__cost--low {
  color: var(--color-success);
}

/* ===== CTA ===== */
.cta {
  padding: 120px 0;
  background: var(--color-bg-alt);
}
.cta__inner {
  text-align: center;
  background: var(--color-gradient);
  padding: 80px 40px;
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}
.cta__inner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}
.cta__inner h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
}
.cta__inner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  margin-bottom: 36px;
  position: relative;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  padding: 80px 0 0;
}
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__brand p {
  color: var(--color-text-muted-dark);
  font-size: 0.9rem;
  margin: 12px 0 20px;
  max-width: 320px;
}
.footer__badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 100px;
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
}
.footer__links h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer__links a {
  display: block;
  color: var(--color-text-muted-dark);
  font-size: 0.9rem;
  margin-bottom: 12px;
  transition: color var(--transition);
}
.footer__links a:hover { color: #fff; }
.footer__bottom {
  padding: 24px 0;
  text-align: center;
}
.footer__bottom p {
  color: var(--color-text-muted-dark);
  font-size: 0.8rem;
}

/* ===== WhatsApp Float ===== */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-whatsapp);
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: all var(--transition);
  z-index: 999;
}
.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37,211,102,0.5);
}

/* ===== Scroll Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 48px; }
  .steps::before { display: none; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 48px; }
}

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }

  /* Mobile menu */
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .nav__cta.open {
    display: inline-flex;
    position: absolute;
    top: calc(72px + 160px);
    left: 24px;
    right: 24px;
    justify-content: center;
  }

  .hero { padding: 120px 0 80px; }
  .hero__inner { grid-template-columns: 1fr; text-align: center; }
  .hero__subtitle { margin: 0 auto 32px; }
  .hero__actions { justify-content: center; }
  .hero__visual { order: -1; }
  .hero__illustration { max-width: 260px; }

  .features__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 40px; }
  .stats__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .comparison { grid-template-columns: 1fr; }

  .footer__inner { grid-template-columns: 1fr; gap: 40px; }

  .section-header { margin-bottom: 48px; }
  .features, .how-it-works, .why-vetrix { padding: 80px 0; }
  .stats { padding: 60px 0; }
  .cta { padding: 80px 0; }
  .cta__inner { padding: 60px 24px; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: stretch; }
  .stats__grid { grid-template-columns: 1fr; gap: 32px; }
}