/* ============================================================
   Redundant Services — Base Stylesheet
   Brand Identity: brand/identity.md
   Per-service: only copy changes. Never touch this file.
   ============================================================ */

/* 1. Custom Properties
   ============================================================ */
:root {
  /* Brand */
  --color-primary:       hsl(217, 91%, 52%);
  --color-primary-dark:  hsl(217, 91%, 38%);
  --color-primary-light: hsl(217, 91%, 93%);

  --color-navy:          hsl(222, 47%, 11%);
  --color-navy-surface:  hsl(222, 35%, 16%);
  --color-navy-border:   hsl(222, 25%, 22%);

  --color-metric:        hsl(142, 69%, 43%);
  --color-metric-bg:     hsl(142, 69%, 95%);

  /* Semantic */
  --color-success: hsl(142, 71%, 43%);
  --color-warning: hsl(45,  93%, 47%);
  --color-error:   hsl(0,   84%, 60%);

  /* Neutral */
  --neutral-50:  hsl(220, 20%, 97%);
  --neutral-100: hsl(220, 16%, 94%);
  --neutral-200: hsl(220, 13%, 88%);
  --neutral-300: hsl(220, 11%, 76%);
  --neutral-400: hsl(220,  9%, 60%);
  --neutral-500: hsl(220,  9%, 45%);
  --neutral-700: hsl(220, 12%, 28%);
  --neutral-900: hsl(220, 16%, 12%);

  /* Typography */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Type scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

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

  /* Layout */
  --container: 1120px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadow */
  --shadow-card: 0 1px 3px hsla(222, 47%, 5%, 0.12), 0 4px 12px hsla(222, 47%, 5%, 0.08);
}

/* 2. Reset
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  font: inherit;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

/* 3. Base
   ============================================================ */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--neutral-700);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-900);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
}

/* 4. Navigation
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--neutral-200);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--neutral-900);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__logo img,
.footer__logo img {
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--neutral-500);
  transition: color 0.15s;
}

.nav__link:hover {
  color: var(--neutral-900);
}

.nav__cta {
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: background 0.15s;
}

.nav__cta:hover {
  background: var(--color-primary-dark);
}

/* 5. Hero
   ============================================================ */
.hero {
  background: var(--color-navy);
  padding: var(--space-24) 0 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Subtle noise texture */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-navy-surface);
  border: 1px solid var(--color-navy-border);
  border-radius: 100px;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--neutral-400);
  margin-bottom: var(--space-8);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-metric);
  flex-shrink: 0;
}

.hero__headline {
  font-size: clamp(var(--text-4xl), 6vw, 4rem);
  font-weight: 700;
  color: #fff;
  max-width: 760px;
  margin: 0 auto var(--space-6);
  letter-spacing: -0.02em;
}

.hero__headline em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__sub {
  font-size: var(--text-lg);
  color: var(--neutral-400);
  max-width: 560px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

.hero__metrics {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero__metric {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--neutral-400);
}

.hero__metric strong {
  color: var(--color-metric);
  font-weight: 600;
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.15s;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--neutral-400);
  border: 1px solid var(--color-navy-border);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn--ghost:hover {
  color: #fff;
  border-color: var(--neutral-400);
}

/* 6. Social Proof
   ============================================================ */
.social-proof {
  background: #fff;
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--neutral-200);
}

.social-proof__text {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--neutral-500);
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.social-proof__logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.social-proof__logo {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--neutral-500);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* 7. Features
   ============================================================ */
.features {
  background: var(--neutral-50);
  padding: var(--space-24) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header .section-label {
  display: block;
  margin-bottom: var(--space-3);
}

.section-header h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--neutral-500);
  max-width: 560px;
  margin: 0 auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: #fff;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.15s, transform 0.15s;
}

.feature-card:hover {
  box-shadow: 0 4px 16px hsla(222, 47%, 5%, 0.12);
  transform: translateY(-2px);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.feature-card h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--neutral-500);
  line-height: 1.6;
}

/* 8. How It Works
   ============================================================ */
.how-it-works {
  background: #fff;
  padding: var(--space-24) 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(16.66% + 28px);
  right: calc(16.66% + 28px);
  height: 1px;
  background: var(--neutral-200);
}

.step {
  text-align: center;
}

.step__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  position: relative;
  z-index: 1;
}

.step h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--text-sm);
  color: var(--neutral-500);
}

/* 9. Metrics
   ============================================================ */
.metrics {
  background: var(--color-navy);
  padding: var(--space-16) 0;
}

.metrics__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.metric-stat__value {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-metric);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.metric-stat__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--neutral-400);
  letter-spacing: 0.04em;
}

/* 10. Testimonials
   ============================================================ */
.testimonials {
  background: var(--neutral-50);
  padding: var(--space-24) 0;
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background: #fff;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
}

.testimonial-card__quote {
  font-size: var(--text-base);
  color: var(--neutral-700);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  position: relative;
}

.testimonial-card__quote::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--neutral-200);
  line-height: 0;
  position: absolute;
  top: 12px;
  left: -8px;
}

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

.testimonial-card__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
}

.testimonial-card__name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--neutral-900);
}

.testimonial-card__role {
  font-size: var(--text-xs);
  color: var(--neutral-500);
  font-family: var(--font-mono);
}

/* 11. Pricing
   ============================================================ */
.pricing {
  background: #fff;
  padding: var(--space-24) 0;
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 760px;
  margin: 0 auto;
}

.pricing-card {
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.pricing-card--featured {
  border-color: var(--color-navy);
  background: var(--color-navy);
  color: #fff;
}

.pricing-card__tier {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--neutral-500);
  margin-bottom: var(--space-4);
}

.pricing-card--featured .pricing-card__tier {
  color: var(--neutral-300);
}

.pricing-card__price {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--neutral-900);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.pricing-card--featured .pricing-card__price {
  color: #fff;
}

.pricing-card__price-sub {
  font-size: var(--text-sm);
  color: var(--neutral-500);
  margin-bottom: var(--space-6);
}

.pricing-card--featured .pricing-card__price-sub {
  color: var(--neutral-300);
}

.pricing-card__divider {
  height: 1px;
  background: var(--neutral-200);
  margin: var(--space-6) 0;
}

.pricing-card--featured .pricing-card__divider {
  background: var(--color-navy-border);
}

.pricing-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.pricing-card__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--neutral-700);
}

.pricing-card--featured .pricing-card__feature {
  color: var(--neutral-300);
}

.pricing-card__feature::before {
  content: '✓';
  color: var(--color-metric);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing-card__feature--muted::before {
  content: '—';
  color: var(--neutral-300);
}

.pricing-card__feature--muted {
  color: var(--neutral-500);
}

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

.btn--outline {
  border: 1px solid var(--neutral-200);
  color: var(--neutral-700);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn--outline:hover {
  border-color: var(--neutral-700);
  background: var(--neutral-50);
}

.btn--navy-ghost {
  border: 1px solid var(--color-navy-border);
  color: var(--neutral-400);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn--navy-ghost:hover {
  border-color: var(--neutral-400);
  color: #fff;
}

/* 12. CTA Banner
   ============================================================ */
.cta-banner {
  background: var(--color-primary-dark);
  padding: var(--space-16) 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: var(--text-3xl);
  color: #fff;
  margin-bottom: var(--space-3);
}

.cta-banner p {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: var(--space-8);
}

.btn--white {
  background: #fff;
  color: var(--color-primary);
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
}

.btn--white:hover {
  background: var(--neutral-50);
  transform: translateY(-1px);
}

/* 13. Footer
   ============================================================ */
.footer {
  background: var(--color-navy);
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-navy-border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--neutral-400);
  transition: color 0.15s;
}

.footer__link:hover {
  color: var(--neutral-300);
}

.footer__universe {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--neutral-400);
}

.footer__universe a {
  color: var(--neutral-400);
  text-decoration: underline;
  transition: color 0.15s;
}

.footer__universe a:hover {
  color: var(--neutral-300);
}

/* 14. Responsive
   ============================================================ */
@media (max-width: 900px) {
  .features__grid,
  .testimonials__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metrics__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .steps::before {
    display: none;
  }

  .step {
    text-align: left;
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: var(--space-4);
    align-items: start;
  }

  .step__number {
    margin: 0;
  }

  .step__content {
    padding-top: var(--space-3);
  }

  .nav__links {
    display: none;
  }
}

@media (max-width: 600px) {
  :root {
    --space-24: 4rem;
    --space-16: 3rem;
  }

  .features__grid,
  .testimonials__grid,
  .pricing__grid {
    grid-template-columns: 1fr;
  }

  .metrics__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

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

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__links {
    justify-content: center;
  }
}