/* ==========================================================================
   Notifica Landing Page — styles.css
   Marina · 2025-07-16
   Dark theme, mobile-first, PT-BR
   ========================================================================== */

/* --------------------------------------------------------------------------
   0. Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Backgrounds */
  --bg-root:        #09090b;
  --bg-surface:     #18181b;
  --bg-surface-alt: #27272a;
  --bg-elevated:    #1c1c20;
  --bg-code:        #0c0c0f;

  /* Brand — verde WhatsApp-inspired */
  --brand-400:      #22c55e;
  --brand-500:      #16a34a;
  --brand-600:      #15803d;
  --brand-glow:     rgba(34, 197, 94, 0.15);

  /* Accent */
  --accent-400:     #60a5fa;
  --accent-500:     #3b82f6;

  /* Text */
  --text-primary:   #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted:     #71717a;
  --text-inverse:   #09090b;

  /* Borders */
  --border-subtle:  rgba(255,255,255,0.06);
  --border-default: rgba(255,255,255,0.10);
  --border-hover:   rgba(255,255,255,0.16);

  /* Channel Colors */
  --ch-whatsapp:    #25D366;
  --ch-email:       #60a5fa;
  --ch-sms:         #a78bfa;
  --ch-push:        #fb923c;
  --ch-inapp:       #f472b6;

  /* Semantic */
  --success:        #22c55e;
  --warning:        #eab308;
  --error:          #ef4444;

  /* Effects */
  --focus-ring:     0 0 0 2px var(--bg-root), 0 0 0 4px var(--brand-400);
  --shadow-card:    0 1px 2px rgba(0,0,0,0.4), 0 0 0 1px var(--border-subtle);
  --shadow-elevated: 0 8px 30px rgba(0,0,0,0.5);
  --glow-brand:     0 0 60px var(--brand-glow);

  /* Typography */
  --font-sans:  'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  --text-xs:    clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm:    clamp(0.8125rem, 0.775rem + 0.2vw, 0.875rem);
  --text-base:  clamp(0.875rem, 0.85rem + 0.15vw, 1rem);
  --text-lg:    clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-xl:    clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --text-2xl:   clamp(1.5rem, 1.25rem + 1vw, 2rem);
  --text-3xl:   clamp(2rem, 1.5rem + 2vw, 3rem);
  --text-4xl:   clamp(2.5rem, 1.75rem + 3vw, 3.75rem);

  --leading-tight:   1.1;
  --leading-snug:    1.25;
  --leading-normal:  1.5;
  --leading-relaxed: 1.625;

  --tracking-tight:  -0.025em;
  --tracking-normal: 0;
  --tracking-wide:   0.025em;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-w:       1200px;
  --max-w-tight: 800px;
  --gutter:      var(--space-6);

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   20px;
  --radius-full: 9999px;

  /* Animation */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:  150ms;
  --duration-base:  250ms;
  --duration-slow:  500ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-root);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
code, pre { font-family: var(--font-mono); }

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

::selection {
  background: rgba(34, 197, 94, 0.3);
  color: var(--text-primary);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------------
   2. Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--tight {
  max-width: var(--max-w-tight);
}

.section {
  padding-block: var(--space-16);
}

.section--surface {
  background: var(--bg-surface);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

@media (min-width: 1024px) {
  .section { padding-block: var(--space-24); }
  :root { --gutter: var(--space-8); }
}

/* --------------------------------------------------------------------------
   3. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
  min-height: 44px;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
}

.btn--primary {
  background: var(--brand-400);
  color: var(--text-inverse);
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.2);
}

.btn--primary:hover {
  background: var(--brand-500);
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(34, 197, 94, 0.3);
}

.btn--primary:active { transform: translateY(0); }

.btn--secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}

.btn--secondary:hover {
  background: var(--bg-surface-alt);
  border-color: var(--border-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn--ghost:hover { color: var(--text-primary); }

.btn--lg {
  min-height: 48px;
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
}

.btn--sm {
  min-height: 36px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

/* --------------------------------------------------------------------------
   4. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding-block: var(--space-4);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--duration-slow) ease,
              border-color var(--duration-slow) ease,
              backdrop-filter var(--duration-slow) ease;
}

.nav--scrolled {
  background: rgba(9, 9, 11, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  flex-shrink: 0;
}

.nav__logo-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--brand-400);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.2); }
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) ease;
}

.nav__link:hover { color: var(--text-primary); }

.nav__link--external {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link--external svg { width: 12px; height: 12px; opacity: 0.5; }

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__login {
  display: none;
}

.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
  transform-origin: center;
}

.nav__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(2.5px, 2.5px);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(2.5px, -2.5px);
}

/* Mobile menu overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 49;
  background: rgba(9, 9, 11, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-20) var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow);
}

.mobile-menu--open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--space-3) var(--space-4);
  transition: color var(--duration-fast) ease;
}

.mobile-menu__link:hover { color: var(--text-primary); }

.mobile-menu__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
  width: 100%;
  max-width: 280px;
}

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

@media (min-width: 1024px) {
  .nav__links { display: flex; }
  .nav__login { display: inline-flex; }
  .nav__hamburger { display: none; }
}

/* --------------------------------------------------------------------------
   5. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: calc(80px + var(--space-16));
  padding-bottom: var(--space-16);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Radial gradient glow */
.hero__bg::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 140%;
  height: 70%;
  background: radial-gradient(
    ellipse at center,
    rgba(34, 197, 94, 0.08) 0%,
    rgba(34, 197, 94, 0.03) 40%,
    transparent 70%
  );
}

/* Grid pattern */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin-inline: auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  background: rgba(255,255,255,0.03);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--brand-400);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero__title {
  font-size: var(--text-4xl);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--brand-400), #4ade80);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.hero__ctas {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.hero__microcopy {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-12);
}

/* Hero code block */
.hero__code-wrapper {
  position: relative;
  max-width: 640px;
  margin-inline: auto;
  text-align: left;
}

.hero__code {
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  overflow-x: auto;
  box-shadow: var(--glow-brand);
  position: relative;
}

.hero__code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

.hero__code-dots {
  display: flex;
  gap: var(--space-2);
}

.hero__code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-surface-alt);
}

.hero__code-dot:nth-child(1) { background: #ef4444; opacity: 0.6; }
.hero__code-dot:nth-child(2) { background: #eab308; opacity: 0.6; }
.hero__code-dot:nth-child(3) { background: #22c55e; opacity: 0.6; }

.hero__code-lang {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hero__code pre {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  overflow-x: auto;
}

.hero__code code {
  font-family: var(--font-mono);
  tab-size: 2;
}

@media (min-width: 480px) {
  .hero__ctas {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding-top: calc(80px + var(--space-24));
    padding-bottom: var(--space-24);
  }
}

/* --------------------------------------------------------------------------
   6. Social Proof
   -------------------------------------------------------------------------- */
.social-proof {
  padding-block: var(--space-12);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.social-proof__content {
  text-align: center;
}

.social-proof__label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  font-weight: 500;
}

.social-proof__metrics {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.social-proof__metric {
  text-align: center;
}

.social-proof__metric-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

.social-proof__metric-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.social-proof__text {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 500px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

@media (min-width: 480px) {
  .social-proof__metrics {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-12);
  }
}

/* --------------------------------------------------------------------------
   7. How It Works
   -------------------------------------------------------------------------- */
.steps {
  display: grid;
  gap: var(--space-10);
  position: relative;
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--brand-400);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--brand-400);
  margin-bottom: var(--space-4);
}

.step__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.step__code {
  display: inline-block;
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--brand-400);
  margin-bottom: var(--space-3);
}

.step__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  max-width: 280px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

.steps__connector {
  display: none;
}

@media (min-width: 1024px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }

  .steps__connector {
    display: block;
    position: absolute;
    top: 24px;
    left: calc(33.333% + 24px);
    right: calc(33.333% + 24px);
    height: 2px;
    background: repeating-linear-gradient(
      90deg,
      var(--border-default) 0px,
      var(--border-default) 8px,
      transparent 8px,
      transparent 16px
    );
  }
}

/* --------------------------------------------------------------------------
   8. Feature Grid
   -------------------------------------------------------------------------- */
.feature-grid {
  display: grid;
  gap: var(--space-4);
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--duration-base) var(--ease-out),
              background var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}

.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-surface-alt);
  transform: translateY(-2px);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  background: rgba(34, 197, 94, 0.1);
}

.feature-card__icon svg {
  width: 22px;
  height: 22px;
}

.feature-card__icon--whatsapp { background: rgba(37, 211, 102, 0.1); }
.feature-card__icon--whatsapp svg { color: var(--ch-whatsapp); }
.feature-card__icon--workflow { background: rgba(124, 58, 237, 0.1); }
.feature-card__icon--workflow svg { color: #a78bfa; }
.feature-card__icon--api { background: rgba(96, 165, 250, 0.1); }
.feature-card__icon--api svg { color: var(--ch-email); }
.feature-card__icon--sdk { background: rgba(251, 146, 60, 0.1); }
.feature-card__icon--sdk svg { color: var(--ch-push); }
.feature-card__icon--dashboard { background: rgba(34, 197, 94, 0.1); }
.feature-card__icon--dashboard svg { color: var(--brand-400); }
.feature-card__icon--inbox { background: rgba(244, 114, 182, 0.1); }
.feature-card__icon--inbox svg { color: var(--ch-inapp); }
.feature-card__icon--lgpd { background: rgba(96, 165, 250, 0.1); }
.feature-card__icon--lgpd svg { color: var(--accent-400); }
.feature-card__icon--brl { background: rgba(34, 197, 94, 0.1); }
.feature-card__icon--brl svg { color: var(--brand-400); }

.feature-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.feature-card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

@media (min-width: 768px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* --------------------------------------------------------------------------
   9. Channel Showcase
   -------------------------------------------------------------------------- */
.channels__cards {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-12);
}

.channels__cards::-webkit-scrollbar { height: 4px; }
.channels__cards::-webkit-scrollbar-track { background: var(--bg-surface); border-radius: 2px; }
.channels__cards::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 2px; }

.channel-card {
  flex: 0 0 220px;
  scroll-snap-align: start;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: border-color var(--duration-base) var(--ease-out);
}

.channel-card:hover { border-color: var(--border-hover); }

.channel-card--featured {
  border-color: var(--ch-whatsapp);
  border-width: 2px;
}

.channel-card__bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.channel-card__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--ch-whatsapp);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.channel-card__icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-3);
}

.channel-card__icon svg { width: 100%; height: 100%; }

.channel-card__name {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.channel-card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

@media (min-width: 1024px) {
  .channels__cards {
    overflow-x: visible;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
  }

  .channel-card { flex: unset; }
}

/* Fallback diagram */
.fallback {
  max-width: 700px;
  margin-inline: auto;
}

.fallback__title {
  font-size: var(--text-lg);
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--space-6);
}

.fallback__diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.fallback__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  min-width: 100px;
  text-align: center;
}

.fallback__node-name {
  font-size: var(--text-sm);
  font-weight: 600;
}

.fallback__node-status {
  font-size: var(--text-xs);
}

.fallback__node--fail .fallback__node-status { color: var(--error); }
.fallback__node--success .fallback__node-status { color: var(--success); }

.fallback__arrow {
  color: var(--text-muted);
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.fallback__code {
  margin-top: var(--space-8);
}

/* --------------------------------------------------------------------------
   10. MCP / AI Section
   -------------------------------------------------------------------------- */
.mcp {
  position: relative;
  overflow: hidden;
}

.mcp::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at 70% 50%,
    rgba(124, 58, 237, 0.06) 0%,
    rgba(96, 165, 250, 0.03) 40%,
    transparent 70%
  );
  pointer-events: none;
}

.mcp__grid {
  display: grid;
  gap: var(--space-10);
  position: relative;
  z-index: 1;
}

.mcp__text h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.mcp__text > p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.mcp__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mcp__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.mcp__feature-check {
  color: var(--brand-400);
  flex-shrink: 0;
  margin-top: 2px;
}

.mcp__diagram {
  margin-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.mcp__diagram-node {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  border: 1px solid var(--border-subtle);
}

.mcp__diagram-node--ai {
  background: rgba(124, 58, 237, 0.15);
  border-color: rgba(124, 58, 237, 0.3);
  color: #c4b5fd;
}

.mcp__diagram-node--notifica {
  background: rgba(34, 197, 94, 0.15);
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--brand-400);
}

.mcp__diagram-node--channels {
  background: rgba(96, 165, 250, 0.15);
  border-color: rgba(96, 165, 250, 0.3);
  color: var(--accent-400);
}

.mcp__diagram-arrow {
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
}

@media (min-width: 1024px) {
  .mcp__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: var(--space-16);
  }
}

/* --------------------------------------------------------------------------
   11. Code Examples (Tabbed)
   -------------------------------------------------------------------------- */
.code-tabs {
  max-width: 720px;
  margin-inline: auto;
}

.code-tabs__nav {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 0;
  overflow-x: auto;
}

.code-tabs__tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: color var(--duration-fast) ease,
              border-color var(--duration-fast) ease;
  white-space: nowrap;
  cursor: pointer;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.code-tabs__tab:hover { color: var(--text-secondary); }

.code-tabs__tab[aria-selected="true"] {
  color: var(--brand-400);
  border-bottom-color: var(--brand-400);
}

.code-tabs__panel {
  display: none;
}

.code-tabs__panel[aria-hidden="false"] {
  display: block;
}

.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  border-top: none;
  position: relative;
  overflow: hidden;
}

.code-block__header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.code-block__copy {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) ease,
              background var(--duration-fast) ease;
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-sans);
}

.code-block__copy:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.code-block__copy svg { width: 14px; height: 14px; }

.code-block pre {
  padding: var(--space-4) var(--space-6);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.7;
  margin: 0;
}

.code-block code {
  font-family: var(--font-mono);
}

/* Standalone code blocks (not in tabs) */
.code-block--standalone {
  border-radius: var(--radius-lg);
  border-top: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   12. Syntax Highlighting
   -------------------------------------------------------------------------- */
.syn-kw   { color: #c084fc; }  /* keywords: import, from, await, const, new */
.syn-str  { color: #4ade80; }  /* strings */
.syn-fn   { color: #60a5fa; }  /* functions */
.syn-cm   { color: #6b7280; font-style: italic; }  /* comments */
.syn-num  { color: #fb923c; }  /* numbers */
.syn-prop { color: #f9a8d4; }  /* property names */
.syn-op   { color: #a1a1aa; }  /* operators */
.syn-type { color: #67e8f9; }  /* types */
.syn-punc { color: #71717a; }  /* punctuation */
.syn-var  { color: #e2e8f0; }  /* variables */
.syn-flag { color: #fbbf24; }  /* cli flags */

/* --------------------------------------------------------------------------
   13. Pricing
   -------------------------------------------------------------------------- */
.pricing-grid {
  display: grid;
  gap: var(--space-4);
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: border-color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}

.pricing-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.pricing-card--popular {
  border: 2px solid var(--brand-400);
  position: relative;
  box-shadow: 0 0 40px rgba(34, 197, 94, 0.1);
}

.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-400);
  color: var(--text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-card__tier {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.pricing-card__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.pricing-card__amount {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
}

.pricing-card__period {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.pricing-card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-card__features {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.pricing-card__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

.pricing-card__feature-check {
  color: var(--brand-400);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-card .btn { width: 100%; }

.pricing__note {
  text-align: center;
  margin-top: var(--space-8);
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 600px;
  margin-inline: auto;
  line-height: var(--leading-relaxed);
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Comparison table */
.comparison {
  margin-top: var(--space-16);
}

.comparison__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-8);
}

.comparison__wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.comparison__table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.comparison__table thead {
  background: var(--bg-surface);
}

.comparison__table th {
  padding: var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.comparison__table th:first-child {
  color: var(--text-secondary);
}

.comparison__table th.comparison__highlight {
  color: var(--brand-400);
}

.comparison__table td {
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.comparison__table tr:nth-child(even) td {
  background: rgba(255,255,255,0.02);
}

.comparison__table tr:last-child td { border-bottom: none; }

.comparison__check { color: var(--brand-400); }
.comparison__cross { color: var(--text-muted); }

/* --------------------------------------------------------------------------
   14. Open Source
   -------------------------------------------------------------------------- */
.opensource__grid {
  display: grid;
  gap: var(--space-10);
}

.opensource__copy {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.opensource__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.opensource__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.opensource__item-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.github-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--duration-base) var(--ease-out);
}

.github-card:hover { border-color: var(--border-hover); }

.github-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.github-card__icon {
  width: 32px;
  height: 32px;
  color: var(--text-primary);
}

.github-card__name {
  font-size: var(--text-lg);
  font-weight: 700;
}

.github-card__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.github-card__meta {
  display: flex;
  gap: var(--space-6);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.github-card__stat {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 1024px) {
  .opensource__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-16);
  }
}

/* --------------------------------------------------------------------------
   15. Final CTA
   -------------------------------------------------------------------------- */
.final-cta {
  position: relative;
  overflow: hidden;
}

.final-cta__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center bottom,
    rgba(34, 197, 94, 0.08) 0%,
    transparent 60%
  );
}

.final-cta__content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.final-cta__title {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
}

.final-cta__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

.final-cta__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.final-cta__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 420px;
}

.final-cta__input {
  padding: var(--space-3) var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  min-height: 48px;
  transition: border-color var(--duration-fast) ease;
}

.final-cta__input:focus {
  outline: none;
  border-color: var(--brand-400);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

.final-cta__input::placeholder { color: var(--text-muted); }

.final-cta__feedback {
  font-size: var(--text-sm);
  text-align: center;
  min-height: 24px;
}

.final-cta__feedback--success { color: var(--success); }
.final-cta__feedback--error { color: var(--error); }

.final-cta__secondary {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.final-cta__secondary a {
  color: var(--accent-400);
  transition: color var(--duration-fast) ease;
}

.final-cta__secondary a:hover { text-decoration: underline; }

@media (min-width: 480px) {
  .final-cta__form {
    flex-direction: row;
  }

  .final-cta__input { flex: 1; }
}

/* MailerLite embed (styled to match our design system) */
#mlb2-36604083.ml-form-embedContainer {
  width: 100% !important;
  max-width: 420px;
}

#mlb2-36604083 .ml-form-align-center,
#mlb2-36604083 .ml-form-align-center > div {
  width: 100%;
}

#mlb2-36604083 .ml-form-embedWrapper {
  background: transparent;
  border: 0;
  width: 100%;
  max-width: 420px;
}

#mlb2-36604083 .ml-form-embedBody,
#mlb2-36604083 .ml-form-successBody {
  padding: 0;
}

#mlb2-36604083 .ml-form-embedContent {
  margin: 0 0 var(--space-4) 0;
}

#mlb2-36604083 .ml-form-embedContent h4 {
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 800;
  margin: 0 0 var(--space-2) 0;
}

#mlb2-36604083 .ml-form-embedContent p,
#mlb2-36604083 .ml-form-successContent p {
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin: 0;
}

#mlb2-36604083 form.ml-block-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

/* MailerLite nests the input inside .ml-form-formContent and the button in .ml-form-embedSubmit.
   We style both so the form behaves like our original CTA (input + button). */
#mlb2-36604083 .ml-form-formContent {
  margin: 0;
}

#mlb2-36604083 .ml-form-fieldRow {
  margin: 0;
}

#mlb2-36604083 .ml-form-embedSubmit {
  margin: 0;
}

#mlb2-36604083 .ml-form-embedSubmit button.loading {
  display: none !important;
}

#mlb2-36604083 .ml-form-embedSubmit .btn {
  width: 100% !important;
}

@media (min-width: 480px) {
  #mlb2-36604083 form.ml-block-form {
    flex-direction: row;
    align-items: stretch;
  }

  #mlb2-36604083 .ml-form-formContent {
    flex: 1;
  }

  #mlb2-36604083 .ml-form-embedSubmit {
    width: auto;
    flex-shrink: 0;
  }

  #mlb2-36604083 .ml-form-embedSubmit .btn {
    width: auto !important;
    white-space: nowrap;
    padding-inline: var(--space-6);
  }
}

/* --------------------------------------------------------------------------
   16. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding-block: var(--space-12);
}

.footer__grid {
  display: grid;
  gap: var(--space-8);
}

.footer__brand {
  margin-bottom: var(--space-2);
}

.footer__brand-name {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: 2px;
}

.footer__brand-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
}

.footer__column-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color var(--duration-fast) ease;
}

.footer__link:hover { color: var(--text-primary); }

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
  align-items: center;
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer__socials {
  display: flex;
  gap: var(--space-4);
}

.footer__social {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: color var(--duration-fast) ease;
}

.footer__social:hover { color: var(--text-primary); }
.footer__social svg { width: 100%; height: 100%; }

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }

  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .footer__grid {
    grid-template-columns: 2fr repeat(4, 1fr);
  }
}

/* --------------------------------------------------------------------------
   17. Scroll Animations
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 75ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 150ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 225ms; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 300ms; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 375ms; }
.reveal-stagger > .reveal:nth-child(7) { transition-delay: 450ms; }
.reveal-stagger > .reveal:nth-child(8) { transition-delay: 525ms; }

/* --------------------------------------------------------------------------
   18. Utility Classes
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-brand { color: var(--brand-400); }
.text-muted { color: var(--text-muted); }

/* Content visibility for below-fold sections */
.section:not(.hero):not(.social-proof) {
  content-visibility: auto;
  contain-intrinsic-size: auto 600px;
}