/* ============================================
   HZERA - Tinnitus Relief App Website
   Dark theme with teal accents
   ============================================ */

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

:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-card: #111111;
  --bg-card-hover: #161616;
  --teal: #00b4b4;
  --teal-light: #00d4d4;
  --teal-glow: rgba(0, 180, 180, 0.15);
  --teal-glow-strong: rgba(0, 180, 180, 0.3);
  --orange: #ff8c42;
  --text-primary: #f0f0f0;
  --text-secondary: #999999;
  --text-muted: #666666;
  --border: #1a1a1a;
  --border-light: #222222;
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 1200px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--teal);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--teal-light);
}

img {
  max-width: 100%;
  height: auto;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
  padding: 0.35rem 0.9rem;
  background: var(--teal-glow);
  border: 1px solid rgba(0, 180, 180, 0.2);
  border-radius: 100px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0.75rem auto 0;
  line-height: 1.7;
}

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

section {
  padding: 6rem 0;
}

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

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
}

nav .nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

nav .logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

nav .logo span {
  color: var(--teal);
}

nav .nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

nav .nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 1.5rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--teal-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-glow);
  border: 1px solid rgba(0, 180, 180, 0.2);
  border-radius: 100px;
  padding: 0.4rem 1rem;
  margin-bottom: 2rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--teal), var(--teal-light), #80ffff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.25s;
  text-decoration: none;
}

.btn-primary {
  background: var(--teal);
  color: #000;
}
.btn-primary:hover {
  background: var(--teal-light);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--teal-glow-strong);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 4rem;
}

.stat-item {
  background: var(--bg-card);
  padding: 2rem 1.5rem;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--teal);
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* --- Problem / Tinnitus Section --- */
.problem-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.problem-text h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.problem-text p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.problem-facts {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.fact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.fact-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--teal-glow);
  border: 1px solid rgba(0, 180, 180, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.fact-card h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.fact-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Science / How It Works --- */
.science-section {
  position: relative;
}

.methodology-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.method-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.method-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.method-card:hover {
  border-color: rgba(0, 180, 180, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

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

.method-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--teal-glow);
  border: 1px solid rgba(0, 180, 180, 0.2);
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 1.25rem;
}

.method-card h3 {
  margin-bottom: 0.75rem;
}

.method-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.method-tag {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal);
  background: var(--teal-glow);
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
}

/* --- Diagnostic Tools --- */
.diagnostic-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.diagnostic-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.diagnostic-step {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  position: relative;
}

.step-icon {
  width: 64px;
  height: 64px;
  background: var(--teal-glow);
  border: 1px solid rgba(0, 180, 180, 0.2);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 1.6rem;
}

.diagnostic-step h3 {
  margin-bottom: 0.5rem;
}

.diagnostic-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.step-badge {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.15);
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
}

/* --- Soundscapes --- */
.soundscapes-section {
  position: relative;
}

.soundscape-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.soundscape-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  text-align: center;
  transition: all 0.25s;
}

.soundscape-card:hover {
  border-color: rgba(0, 180, 180, 0.3);
  transform: translateY(-3px);
}

.soundscape-card.premium {
  border-color: rgba(255, 140, 66, 0.2);
}

.soundscape-card.premium:hover {
  border-color: rgba(255, 140, 66, 0.4);
}

.soundscape-emoji {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

.soundscape-card h4 {
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.soundscape-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.soundscape-tag {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
}

.tag-free {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.15);
}

.tag-premium {
  color: var(--orange);
  background: rgba(255, 140, 66, 0.1);
  border: 1px solid rgba(255, 140, 66, 0.15);
}

/* --- Assessment --- */
.assessment-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.severity-scale {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 3rem;
}

.severity-item {
  background: var(--bg-card);
  padding: 1.5rem 1rem;
  text-align: center;
}

.severity-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin: 0 auto 0.75rem;
}

.severity-item:nth-child(1) .severity-dot { background: #4ade80; }
.severity-item:nth-child(2) .severity-dot { background: #a3e635; }
.severity-item:nth-child(3) .severity-dot { background: #facc15; }
.severity-item:nth-child(4) .severity-dot { background: var(--orange); }
.severity-item:nth-child(5) .severity-dot { background: #ef4444; }

.severity-item h4 {
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.severity-item .severity-range {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.severity-item p {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  line-height: 1.5;
}

/* --- Pricing / Free vs Premium --- */
.pricing-section {
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--teal);
  box-shadow: 0 0 60px var(--teal-glow);
}

.pricing-card.featured::before {
  content: 'BEST VALUE';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--teal);
  color: #000;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.3rem 1rem;
  border-radius: 100px;
}

.pricing-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 1rem 0 0.25rem;
  letter-spacing: -0.03em;
}

.pricing-price .currency {
  font-size: 1.2rem;
  vertical-align: super;
  color: var(--text-secondary);
}

.pricing-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.pricing-features li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: rgba(74, 222, 128, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.pricing-features .check::before {
  background: rgba(74, 222, 128, 0.15) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234ade80' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 12px no-repeat;
}

.pricing-divider {
  height: 1px;
  background: var(--border-light);
  margin: 1.5rem 0;
}

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

/* --- Tips Carousel --- */
.tips-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.tip-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.tip-category {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.75rem;
}

.tip-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* --- Legal Pages --- */
.legal-page {
  padding-top: 8rem;
  padding-bottom: 4rem;
}

.legal-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.legal-content h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.legal-date {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 3rem;
}

.legal-content h2 {
  font-size: 1.3rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.legal-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.legal-content a {
  color: var(--teal);
}

/* --- Contact / Support --- */
.contact-section {
  text-align: center;
}

.contact-card {
  max-width: 500px;
  margin: 3rem auto 0;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 3rem 2rem;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--teal);
  margin-top: 1rem;
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--text-secondary);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --- Waveform Animation --- */
.waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 40px;
  margin: 2rem auto;
}

.waveform span {
  display: block;
  width: 3px;
  background: var(--teal);
  border-radius: 3px;
  animation: wave 1.2s ease-in-out infinite;
}

.waveform span:nth-child(1) { height: 20%; animation-delay: 0s; }
.waveform span:nth-child(2) { height: 45%; animation-delay: 0.1s; }
.waveform span:nth-child(3) { height: 70%; animation-delay: 0.2s; }
.waveform span:nth-child(4) { height: 100%; animation-delay: 0.3s; }
.waveform span:nth-child(5) { height: 70%; animation-delay: 0.4s; }
.waveform span:nth-child(6) { height: 45%; animation-delay: 0.5s; }
.waveform span:nth-child(7) { height: 100%; animation-delay: 0.6s; }
.waveform span:nth-child(8) { height: 70%; animation-delay: 0.7s; }
.waveform span:nth-child(9) { height: 45%; animation-delay: 0.8s; }
.waveform span:nth-child(10) { height: 20%; animation-delay: 0.9s; }

@keyframes wave {
  0%, 100% { transform: scaleY(0.5); opacity: 0.5; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* --- Notch Filter Visual --- */
.notch-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 2rem;
  margin-top: 2rem;
}

.notch-graph {
  position: relative;
  height: 120px;
  background: linear-gradient(to right,
    var(--teal-glow) 0%, var(--teal-glow) 40%,
    transparent 45%, transparent 55%,
    var(--teal-glow) 60%, var(--teal-glow) 100%
  );
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.notch-bar {
  flex: 1;
  background: var(--teal);
  margin: 0 1px;
  border-radius: 2px 2px 0 0;
  transition: height 0.3s;
  min-height: 4px;
}

.notch-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.75rem;
}

.notch-labels span {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.notch-labels .notch-center {
  color: var(--orange);
  font-weight: 600;
}

/* --- Feature List with Icons --- */
.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--teal-glow);
  border: 1px solid rgba(0, 180, 180, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.feature-item h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.feature-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- CTA Banner --- */
.cta-banner {
  text-align: center;
  padding: 5rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, var(--teal-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner h2 {
  position: relative;
  z-index: 1;
  margin-bottom: 1rem;
}

.cta-banner p {
  position: relative;
  z-index: 1;
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .methodology-grid,
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  section { padding: 4rem 0; }

  .mobile-toggle { display: block; }

  nav .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }

  nav .nav-links.open {
    display: flex;
  }

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

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

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

  .diagnostic-flow {
    grid-template-columns: 1fr;
  }

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

  .severity-scale {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }

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

  .feature-row {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .soundscape-grid {
    grid-template-columns: 1fr;
  }

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

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