/* ============================================
   DocReview AI — Design System & Styles
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-blue: #3b82f6;
  --accent-violet: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;

  --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --gradient-hero: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  --gradient-card: linear-gradient(145deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.05));

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

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

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

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

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

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

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  outline: none;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  transition: all var(--transition-base);
  backdrop-filter: blur(0px);
}

.navbar.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: var(--space-3) 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.navbar__logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
}

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

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.navbar__links a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  position: relative;
  padding: var(--space-1) 0;
}

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

.navbar__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.navbar__links a:hover::after {
  width: 100%;
}

.navbar__cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar__mobile-toggle {
  display: none;
  background: none;
  color: var(--text-primary);
  font-size: var(--font-size-2xl);
  padding: var(--space-2);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

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

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn--large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
  border-radius: var(--radius-xl);
}

.btn--ghost {
  background: transparent;
  color: var(--accent-blue);
  padding: var(--space-2) var(--space-4);
}

.btn--ghost:hover {
  background: rgba(59, 130, 246, 0.1);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: float 8s ease-in-out infinite;
}

.hero__orb--1 {
  width: 500px;
  height: 500px;
  background: var(--accent-blue);
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.hero__orb--2 {
  width: 400px;
  height: 400px;
  background: var(--accent-violet);
  bottom: -10%;
  left: -5%;
  animation-delay: -3s;
}

.hero__orb--3 {
  width: 300px;
  height: 300px;
  background: var(--accent-cyan);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -5s;
  opacity: 0.15;
}

.hero__grid {
  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, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.8s ease forwards;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, var(--font-size-6xl));
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.8s ease 0.15s both;
}

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

.hero__subtitle {
  font-size: clamp(1rem, 2vw, var(--font-size-xl));
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-10);
  line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  animation: fadeInUp 0.8s ease 0.45s both;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  margin-top: var(--space-16);
  animation: fadeInUp 0.8s ease 0.6s both;
}

.hero__stat {
  text-align: center;
}

.hero__stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

/* --- Sections --- */
.section {
  padding: var(--space-24) 0;
  position: relative;
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-16);
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, var(--font-size-4xl));
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.section__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.steps::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 16.67%;
  width: 66.67%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-violet), var(--accent-cyan));
  opacity: 0.3;
}

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

.step__number {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--gradient-card);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  font-size: 2.5rem;
  transition: all var(--transition-base);
}

.step:hover .step__number {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
  border-color: rgba(59, 130, 246, 0.3);
}

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

.step__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* --- Services / Features --- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(59, 130, 246, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-6);
  background: var(--gradient-card);
  border: 1px solid var(--border-glass);
}

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

.feature-card__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.feature-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.feature-card__tag {
  padding: var(--space-1) var(--space-3);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--accent-blue);
  font-weight: 500;
}

/* --- Pricing --- */
.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card--featured {
  border-color: rgba(59, 130, 246, 0.4);
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.04));
  box-shadow: var(--shadow-glow);
}

.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card__name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.pricing-card__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.pricing-card__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
}

.pricing-card__amount {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.pricing-card__features {
  list-style: none;
  margin-bottom: var(--space-8);
}

.pricing-card__features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.pricing-card__features li::before {
  content: '✓';
  color: var(--accent-emerald);
  font-weight: 700;
  font-size: var(--font-size-base);
}

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

/* --- FAQ --- */
.faq-list {
  max-width: 768px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-glass);
}

.faq-item__question {
  width: 100%;
  background: none;
  color: var(--text-primary);
  padding: var(--space-6) 0;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transition: color var(--transition-fast);
}

.faq-item__question:hover {
  color: var(--accent-blue);
}

.faq-item__icon {
  font-size: var(--font-size-xl);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item.active .faq-item__icon {
  transform: rotate(45deg);
  color: var(--accent-blue);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-item.active .faq-item__answer {
  max-height: 300px;
  padding-bottom: var(--space-6);
}

.faq-item__answer p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: var(--space-20) 0;
  position: relative;
  overflow: hidden;
}

.cta-section__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.05));
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section__title {
  font-size: clamp(1.5rem, 3.5vw, var(--font-size-4xl));
  font-weight: 800;
  margin-bottom: var(--space-4);
}

.cta-section__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-8);
}

/* --- Footer --- */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--border-glass);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: var(--space-4);
  max-width: 300px;
}

.footer__heading {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: var(--space-3);
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.footer__links a:hover {
  color: var(--accent-blue);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-glass);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* --- Human Review Section --- */
.human-review-section {
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.03), transparent);
}

.human-review {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.human-review__features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.625rem;
  margin: 1.5rem 0 2rem;
}

.human-review__feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.human-review__feature-icon {
  color: var(--accent-emerald);
  font-weight: 700;
  font-size: var(--font-size-base);
}

.human-review__actions {
  margin-top: 0.5rem;
}

.human-review__comparison {
  display: flex;
  gap: 1rem;
}

.comparison-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  transition: all var(--transition-base);
}

.comparison-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.comparison-card--featured {
  border-color: rgba(139, 92, 246, 0.4);
  background: linear-gradient(145deg, rgba(139, 92, 246, 0.1), rgba(59, 130, 246, 0.05));
  box-shadow: var(--shadow-glow);
}

.comparison-card__header {
  font-size: var(--font-size-base);
  font-weight: 700;
  text-align: center;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-glass);
}

.comparison-card__header--ai {
  color: var(--text-secondary);
}

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

.comparison-card__list {
  list-style: none;
  margin-bottom: 1.25rem;
}

.comparison-card__list li {
  padding: 0.375rem 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.comparison-card__list li:first-child {
  padding-top: 0;
}

.comparison-card__price {
  text-align: center;
  font-size: var(--font-size-xl);
  font-weight: 800;
  padding-top: 1rem;
  border-top: 1px solid var(--border-glass);
}

.comparison-card--featured .comparison-card__price {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Animations --- */
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .navbar__links,
  .navbar__cta .btn--secondary {
    display: none;
  }

  .navbar__mobile-toggle {
    display: block;
  }

  .hero__stats {
    gap: var(--space-6);
    flex-wrap: wrap;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .steps::before {
    display: none;
  }

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

  .pricing {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .human-review {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .human-review__comparison {
    flex-direction: column;
  }

  .human-review__features {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

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