/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0B0D12;
  --bg-secondary: #13161E;
  --bg-card: #191D28;
  --bg-elevated: #1F2433;
  --accent-primary: #FF5A3C;
  --accent-secondary: #00C9A7;
  --accent-tertiary: #FFB830;
  --text-heading: #F0F2F8;
  --text-body: #A0A7B8;
  --text-muted: #6B7280;
  --border-subtle: #1E2230;
  --border-medium: #2A2F3E;
  --gradient-hero: linear-gradient(135deg, #0B0D12 0%, #13162A 50%, #0B0D12 100%);
  --gradient-accent: linear-gradient(135deg, #FF5A3C, #FF7B3C);
  --gradient-teal: linear-gradient(135deg, #00C9A7, #00B4D8);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: var(--accent-secondary); transition: color 0.2s; }
a:hover { color: var(--accent-primary); }

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Scroll Reveal ===== */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s ease-out, transform 0.65s ease-out;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== Navigation (.main-nav) ===== */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 13, 18, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s, border-color 0.3s;
}
.main-nav.scrolled {
  background: rgba(11, 13, 18, 0.98);
  border-bottom-color: var(--border-medium);
}
.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
  align-items: center;
}
.nav-links a {
  color: var(--text-body);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--text-heading); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--gradient-accent);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
  transition: transform 0.2s, box-shadow 0.2s !important;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 90, 60, 0.35);
}
.nav-cta::after { display: none !important; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-heading);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== Hero ===== */
.hero-section {
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}
.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,60,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,201,167,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-tag {
  display: inline-block;
  background: rgba(255,90,60,0.12);
  color: var(--accent-primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero-title span {
  background: var(--gradient-teal);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 34px;
  max-width: 500px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,90,60,0.3);
}
.btn-primary:hover { box-shadow: 0 6px 28px rgba(255,90,60,0.45); }
.btn-outline {
  background: transparent;
  color: var(--text-heading);
  border: 1px solid var(--border-medium);
}
.btn-outline:hover {
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
}
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-orb {
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(0,201,167,0.15) 0%, rgba(255,90,60,0.08) 40%, rgba(11,13,18,0) 70%);
  position: relative;
  animation: orbPulse 6s ease-in-out infinite;
}
.hero-orb::before {
  content: '';
  position: absolute;
  inset: 30px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.06);
  animation: orbSpin 20s linear infinite;
}
.hero-orb::after {
  content: '';
  position: absolute;
  inset: 80px;
  border-radius: 50%;
  background: rgba(255,90,60,0.06);
  animation: orbPulse 4s ease-in-out infinite alternate;
}
@keyframes orbPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
@keyframes orbSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===== Section Headers ===== */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-secondary);
  margin-bottom: 10px;
}
.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.6;
}

/* ===== Capabilities Grid ===== */
.capabilities-grid {
  padding: 100px 0;
  background: var(--bg-secondary);
  position: relative;
}
.capabilities-grid .section-header {
  text-align: center;
  margin-bottom: 56px;
}
.capabilities-grid .section-desc { margin: 0 auto 0; }
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto;
  gap: 20px;
}
.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.bento-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.bento-card.featured {
  grid-row: span 2;
  background: linear-gradient(160deg, var(--bg-card) 0%, #1A1530 100%);
  border: 1px solid rgba(255,90,60,0.2);
}
.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 18px;
}
.bento-icon.red { background: rgba(255,90,60,0.12); color: var(--accent-primary); }
.bento-icon.teal { background: rgba(0,201,167,0.12); color: var(--accent-secondary); }
.bento-icon.gold { background: rgba(255,184,48,0.12); color: var(--accent-tertiary); }
.bento-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
}
.bento-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.bento-card.featured h3 { font-size: 1.3rem; }
.bento-card.featured p { font-size: 0.95rem; }

/* ===== Approach Timeline ===== */
.approach-timeline {
  padding: 100px 0;
  background: var(--bg-primary);
  position: relative;
}
.approach-timeline .section-header {
  max-width: 600px;
  margin-bottom: 60px;
}
.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  position: relative;
}
.timeline-list::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-subtle);
}
.timeline-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 28px;
  align-items: start;
}
.timeline-marker {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: #fff;
  background: var(--gradient-accent);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.timeline-item:nth-child(even) .timeline-marker { background: var(--gradient-teal); }
.timeline-content h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 6px;
}
.timeline-content p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Impact Dashboard ===== */
.impact-dashboard {
  padding: 100px 0;
  background: var(--bg-secondary);
}
.impact-dashboard .section-header {
  text-align: center;
  margin-bottom: 56px;
}
.impact-dashboard .section-desc { margin: 0 auto; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
}
.stat-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}
.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-number span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== Tech Partners ===== */
.tech-partners {
  padding: 100px 0;
  background: var(--bg-primary);
}
.tech-partners .section-header {
  text-align: center;
  margin-bottom: 48px;
}
.tech-partners .section-desc { margin: 0 auto; }
.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 10px 24px;
  border-radius: 24px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-family: var(--font-sans);
}
.tab-btn:hover { border-color: var(--border-medium); color: var(--text-heading); }
.tab-btn.active {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
}
.tab-panel {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.tab-panel.active { display: grid; }
.tech-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
  transition: border-color 0.3s, color 0.3s;
}
.tech-item:hover {
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
}

/* ===== Engagement Models ===== */
.engagement-models {
  padding: 100px 0;
  background: var(--bg-secondary);
}
.engagement-models .section-header {
  text-align: center;
  margin-bottom: 60px;
}
.engagement-models .section-desc { margin: 0 auto; }
.model-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 60px;
}
.model-row:last-child { margin-bottom: 0; }
.model-row.reverse { direction: rtl; }
.model-row.reverse .model-text { direction: ltr; }
.model-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  position: relative;
  overflow: hidden;
}
.model-visual::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,60,0.1) 0%, transparent 70%);
  top: -10%;
  right: -10%;
}
.model-icon-large {
  font-size: 4rem;
  position: relative;
  z-index: 1;
}
.model-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 12px;
}
.model-text p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.model-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.model-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-body);
}
.model-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  flex-shrink: 0;
}

/* ===== Insights FAQ ===== */
.insights-faq {
  padding: 100px 0;
  background: var(--bg-primary);
}
.insights-faq .section-header {
  text-align: center;
  margin-bottom: 48px;
}
.insights-faq .section-desc { margin: 0 auto; }
.faq-list {
  max-width: 750px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item:hover { border-color: var(--border-medium); }
.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
  font-family: var(--font-sans);
  text-align: left;
}
.faq-q::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent-secondary);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.active .faq-q::after { transform: rotate(45deg); color: var(--accent-primary); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.active .faq-a {
  max-height: 300px;
}
.faq-a p {
  padding: 0 28px 20px;
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* ===== Contact Hub ===== */
.contact-hub {
  padding: 100px 0;
  background: var(--bg-secondary);
}
.contact-hub .section-header {
  text-align: center;
  margin-bottom: 56px;
}
.contact-hub .section-desc { margin: 0 auto; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  max-width: 1000px;
  margin: 0 auto;
  align-items: start;
}
.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.3s;
}
.contact-card:hover { border-color: var(--accent-secondary); }
.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0,201,167,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-card-text strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-heading);
  margin-bottom: 2px;
}
.contact-card-text span {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.contact-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.contact-form-box h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-body);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-heading);
  font-size: 0.92rem;
  font-family: var(--font-sans);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-secondary);
  box-shadow: 0 0 0 3px rgba(0,201,167,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: var(--font-sans);
}
.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255,90,60,0.35);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer-brand h4 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 10px;
}
.footer-brand h4 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer-links h5 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent-secondary); }
.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.6rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-subtitle { margin: 0 auto 34px; }
  .hero-actions { justify-content: center; }
  .hero-orb { width: 260px; height: 260px; margin: 0 auto; }
  .bento-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-card.featured { grid-row: auto; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tab-panel { grid-template-columns: repeat(2, 1fr); }
  .model-row { grid-template-columns: 1fr; gap: 28px; }
  .model-row.reverse { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(11, 13, 18, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 32px 24px;
    gap: 20px;
    display: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero-section { padding: 130px 0 60px; }
  .hero-title { font-size: 2.1rem; }
  .bento-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 1.8rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .tab-panel { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.7rem; }
  .btn { padding: 12px 22px; font-size: 0.88rem; }
}