/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Screen reader only - for accessibility */
.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;
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, #0b0f19 0%, #1a1f2e 100%);
  min-height: 100vh;
  color: #fff;
  line-height: 1.6;
}

/* ===== NAVBAR ===== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: rgba(17, 17, 17, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(34, 197, 94, 0.1);
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo img {
  height: 130px;
  width: auto;
  margin: -45px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.logo:hover img {
  transform: scale(1.05);
  opacity: 0.9;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  color: #9ca3af;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-weight: 500;
}

.nav-links a:hover {
  color: #fff;
  background: rgba(34, 197, 94, 0.15);
}

.nav-links a.active {
  color: #22c55e;
  background: rgba(34, 197, 94, 0.2);
}

/* ===== HERO SECTION ===== */
.hero {
  text-align: center;
  padding: 100px 20px 80px;
  background: radial-gradient(ellipse at top, rgba(34, 197, 94, 0.1) 0%, transparent 60%);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #9ca3af 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: #9ca3af;
  max-width: 600px;
  margin: 0 auto 40px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  padding: 14px 28px;
  color: #000;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(34, 197, 94, 0.4);
}

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

/* ===== CONTAINER & GRID ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ===== CARDS ===== */
.card {
  background: linear-gradient(145deg, rgba(30, 35, 50, 0.9), rgba(20, 25, 35, 0.9));
  padding: 32px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #22c55e, #4ade80);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(34, 197, 94, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px rgba(34, 197, 94, 0.1);
}

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

.card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
  color: #fff;
}

.card p {
  color: #9ca3af;
  margin-bottom: 24px;
  font-size: 1rem;
}

.card .btn {
  padding: 12px 24px;
  font-size: 0.95rem;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 40px 20px;
  color: #6b7280;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(0, 0, 0, 0.2);
}

/* ===== CALCULATOR PAGES ===== */
.calculator-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px;
}

.page-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 40px;
  background: linear-gradient(135deg, #22c55e, #4ade80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.crypto-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 40px;
  background: linear-gradient(135deg, #22c55e, #4ade80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.calculator-box {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  background: linear-gradient(145deg, rgba(30, 35, 50, 0.9), rgba(20, 25, 35, 0.9));
  padding: 40px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

@media (max-width: 900px) {
  .calculator-box {
    grid-template-columns: 1fr;
  }
}

/* ===== INPUT STYLING ===== */
.inputs {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.input-group label {
  font-size: 0.9rem;
  color: #9ca3af;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-group input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.input-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(34, 197, 94, 0.4);
  transition: transform 0.2s ease;
}

.input-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.input-group input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 10px rgba(34, 197, 94, 0.4);
}

.input-group select {
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  outline: none;
  transition: all 0.3s ease;
}

.input-group select:hover,
.input-group select:focus {
  border-color: rgba(34, 197, 94, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.value-display {
  font-size: 1.5rem;
  font-weight: 700;
  color: #22c55e;
}

/* ===== CHART BOX ===== */
.chart-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.chart-box canvas {
  max-height: 350px;
}

/* ===== SUMMARY ===== */
.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.summary > div {
  text-align: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.summary > div:first-child {
  color: #9ca3af;
}

.summary > div:nth-child(2) {
  color: #22c55e;
}

.summary > div:nth-child(3) {
  color: #4ade80;
}

.summary strong {
  display: block;
  font-size: 1.4rem;
  margin-top: 8px;
}

@media (max-width: 600px) {
  .summary {
    grid-template-columns: 1fr;
  }
}

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

.card {
  animation: fadeInUp 0.6s ease forwards;
}

.card:nth-child(2) {
  animation-delay: 0.1s;
}

.card:nth-child(3) {
  animation-delay: 0.2s;
}

/* ===== LOADING STATE ===== */
#loading {
  text-align: center;
  color: #9ca3af;
  padding: 20px;
  display: none;
}

/* ===== HEADLINE ===== */
#headline {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: #22c55e;
}

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 768px) {
  .navbar {
    padding: 15px 20px;
  }

  .logo img {
    height: 70px;
    margin: -20px 0;
  }

  .nav-links a {
    padding: 8px 12px;
    font-size: 0.9rem;
  }

  .hero {
    padding: 60px 20px 50px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .page-title,
  .crypto-title {
    font-size: 1.8rem;
  }

  .calculator-box {
    padding: 24px;
  }

  .value-display {
    font-size: 1.25rem;
  }
}

/* ===== SEO CONTENT SECTION ===== */
.seo-content {
  background: rgba(0, 0, 0, 0.3);
  padding: 60px 20px;
  margin-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.seo-content .container {
  max-width: 800px;
}

.seo-content h2 {
  color: #22c55e;
  font-size: 1.5rem;
  margin: 40px 0 16px;
}

.seo-content h2:first-child {
  margin-top: 0;
}

.seo-content h3 {
  color: #fff;
  font-size: 1.1rem;
  margin: 24px 0 12px;
}

.seo-content p {
  color: #9ca3af;
  line-height: 1.8;
  margin-bottom: 16px;
}

.seo-content ul,
.seo-content ol {
  color: #9ca3af;
  line-height: 1.8;
  margin-left: 24px;
  margin-bottom: 16px;
}

.seo-content li {
  margin-bottom: 8px;
}

.seo-content strong {
  color: #fff;
}

.seo-content a {
  color: #22c55e;
  text-decoration: none;
}

.seo-content a:hover {
  text-decoration: underline;
}

/* ===== INTERNAL LINKS ===== */
.internal-links {
  margin-top: 24px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.internal-links p {
  margin: 0 0 10px 0;
  font-size: 0.8rem;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.internal-links a {
  display: inline-block;
  padding: 6px 12px;
  margin: 4px 4px 4px 0;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 6px;
  color: #22c55e;
  font-size: 0.8rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.internal-links a:hover {
  background: rgba(34, 197, 94, 0.2);
  transform: translateY(-1px);
}

/* ===== FUTURE WEALTH CALCULATOR ===== */
.wealth-result {
  text-align: center;
  padding: 30px;
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(59, 130, 246, 0.1));
  border-radius: 20px;
  margin-bottom: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.wealth-result .big-number {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, #22c55e, #4ade80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.wealth-result .subtitle {
  color: #9ca3af;
  margin-top: 8px;
}

.wealth-tier {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1.1rem;
  margin-top: 16px;
}

.tier-struggling { background: #7f1d1d; color: #fca5a5; }
.tier-middle { background: #1e3a5f; color: #93c5fd; }
.tier-uppermiddle { background: #1e3a8a; color: #60a5fa; }
.tier-comfortable { background: #065f46; color: #6ee7b7; }
.tier-rich { background: #166534; color: #4ade80; }
.tier-wealthy { background: #854d0e; color: #fcd34d; }
.tier-elite { background: linear-gradient(135deg, #b45309, #d97706); color: #fff; }

.age-milestones {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 30px 0;
}

.milestone-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.milestone-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 197, 94, 0.3);
}

.milestone-card .age {
  font-size: 0.85rem;
  color: #9ca3af;
  margin-bottom: 8px;
}

.milestone-card .amount {
  font-size: 1.3rem;
  font-weight: 700;
  color: #22c55e;
}

.milestone-card .tier-label {
  font-size: 0.75rem;
  margin-top: 8px;
  padding: 4px 10px;
  border-radius: 12px;
  display: inline-block;
}

.achievements {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}

.achievement {
  padding: 8px 16px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 20px;
  font-size: 0.85rem;
  color: #a78bfa;
}

.achievement.unlocked {
  background: rgba(34, 197, 94, 0.15);
  border-color: rgba(34, 197, 94, 0.3);
  color: #4ade80;
}

.comparison-bar {
  margin: 20px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
}

.comparison-bar h4 {
  margin: 0 0 12px 0;
  font-size: 0.85rem;
  color: #9ca3af;
}

.bar-container {
  height: 24px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 12px;
  transition: width 0.5s ease;
}

.bar-fill.you {
  background: linear-gradient(90deg, #22c55e, #4ade80);
}

.bar-markers {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.75rem;
  color: #6b7280;
}

.lifestyle-preview {
  margin-top: 30px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.lifestyle-preview h4 {
  margin: 0 0 16px 0;
  color: #fff;
}

.lifestyle-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.lifestyle-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 10px;
}

.lifestyle-item .icon {
  font-size: 1.5rem;
}

.lifestyle-item .text {
  font-size: 0.9rem;
  color: #9ca3af;
}

.lifestyle-item.unlocked .text {
  color: #4ade80;
}

/* Formula Section */
.formula-section {
  margin-top: 30px;
  padding: 24px;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 16px;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.formula-section h4 {
  margin: 0 0 16px 0;
  color: #fff;
}

.formula-box {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 20px;
}

.formula-text {
  font-family: 'Courier New', monospace;
  color: #93c5fd;
  font-size: 0.95rem;
}

.formula-text strong {
  color: #22c55e;
}

.formula-example {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 20px;
}

.example-title {
  font-size: 0.85rem;
  color: #9ca3af;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.example-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
}

.step.highlight {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.step-label {
  color: #9ca3af;
  font-size: 0.9rem;
}

.step-value {
  font-weight: 600;
  color: #fff;
  font-family: 'Courier New', monospace;
}

.step.highlight .step-value {
  color: #4ade80;
}

.example-note {
  margin-top: 16px;
  font-size: 0.8rem;
  color: #6b7280;
  font-style: italic;
}

@media (max-width: 768px) {
  .age-milestones {
    grid-template-columns: repeat(2, 1fr);
  }
  .lifestyle-items {
    grid-template-columns: 1fr;
  }
  .wealth-result .big-number {
    font-size: 2rem;
  }
}

/* ===== BITCOIN MILLIONAIRE CALCULATOR ===== */

.prediction-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pred-btn {
  flex: 1;
  min-width: 100px;
  padding: 12px 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: #9ca3af;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
}

.pred-btn span {
  font-size: 0.7rem;
  opacity: 0.7;
}

.pred-btn:hover {
  background: rgba(247, 147, 26, 0.1);
  border-color: rgba(247, 147, 26, 0.3);
}

.pred-btn.active {
  background: rgba(247, 147, 26, 0.2);
  border-color: #f7931a;
  color: #f7931a;
}

.btc-price-prediction {
  margin-top: 20px;
  padding: 16px;
  background: linear-gradient(135deg, rgba(247, 147, 26, 0.1), rgba(247, 147, 26, 0.05));
  border-radius: 16px;
  border: 1px solid rgba(247, 147, 26, 0.2);
}

.prediction-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: #f7931a;
}

.prediction-header .icon {
  font-size: 1.1rem;
}

.prediction-prices {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.price-year {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.price-year span {
  font-size: 0.75rem;
  color: #9ca3af;
}

.price-year strong {
  font-size: 0.95rem;
  color: #fff;
}

.millionaire-result {
  text-align: center;
  padding: 40px 30px;
  background: linear-gradient(135deg, rgba(247, 147, 26, 0.15), rgba(247, 147, 26, 0.05));
  border-radius: 24px;
  border: 2px solid rgba(247, 147, 26, 0.3);
  margin-bottom: 24px;
}

.result-icon {
  font-size: 3rem;
  margin-bottom: 10px;
}

.result-year {
  font-size: 4rem;
  font-weight: 800;
  color: #f7931a;
  line-height: 1;
  margin-bottom: 8px;
  text-shadow: 0 0 40px rgba(247, 147, 26, 0.4);
}

.result-text {
  font-size: 1.3rem;
  color: #e5e7eb;
  margin-bottom: 6px;
}

.result-text .highlight {
  color: #f7931a;
  font-weight: 700;
}

.result-subtext {
  font-size: 0.95rem;
  color: #9ca3af;
}

.btc-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-box {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.milestone-timeline {
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 24px;
}

.timeline-title {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 16px;
  text-align: center;
}

.timeline-track {
  display: flex;
  justify-content: space-between;
  position: relative;
  padding: 0 10px;
}

.timeline-track::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 30px;
  right: 30px;
  height: 2px;
  background: linear-gradient(90deg, rgba(247, 147, 26, 0.3), #f7931a);
}

.milestone-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}

.marker-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #1a1f2e;
  border: 3px solid #f7931a;
}

.marker-dot.gold {
  background: #f7931a;
  box-shadow: 0 0 20px rgba(247, 147, 26, 0.6);
}

.marker-label {
  font-size: 0.85rem;
  color: #e5e7eb;
  font-weight: 600;
}

.marker-year {
  font-size: 0.9rem;
  color: #f7931a;
  font-weight: 700;
}

.scenario-comparison {
  margin-top: 24px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
}

.scenario-title {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 16px;
  text-align: center;
}

.scenarios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.scenario-box {
  padding: 16px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.scenario-box.active {
  background: rgba(247, 147, 26, 0.15);
  border-color: rgba(247, 147, 26, 0.4);
}

.scenario-name {
  font-size: 0.85rem;
  color: #9ca3af;
  margin-bottom: 6px;
}

.scenario-year {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.scenario-box.active .scenario-year {
  color: #f7931a;
}

.model-explanation {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: rgba(247, 147, 26, 0.08);
  border-radius: 14px;
  border-left: 4px solid #f7931a;
  margin-top: 16px;
}

.model-explanation .model-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
}

.model-explanation .model-text strong {
  display: block;
  color: #f7931a;
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.model-explanation .model-text p {
  color: #9ca3af;
  font-size: 0.82rem;
  line-height: 1.5;
  margin: 0;
}

.model-buttons .pred-btn {
  flex: 1;
  min-width: 90px;
}

.prediction-table {
  margin-top: 8px;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.price-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
}

.price-year-label {
  font-size: 0.75rem;
  color: #6b7280;
  font-weight: 500;
}

.price-value {
  font-size: 0.9rem;
  color: #fff;
}

.price-change {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

.price-change.positive {
  color: #4ade80;
  background: rgba(34, 197, 94, 0.15);
}

.price-change.negative {
  color: #f87171;
  background: rgba(248, 113, 113, 0.15);
}

@media (max-width: 768px) {
  .btc-stats {
    grid-template-columns: 1fr;
  }
  .scenarios {
    grid-template-columns: 1fr;
  }
  .prediction-buttons {
    flex-direction: column;
  }
  .result-year {
    font-size: 3rem;
  }
  .timeline-track {
    flex-direction: column;
    gap: 16px;
    padding: 0;
  }
  .timeline-track::before {
    display: none;
  }
  .milestone-marker {
    flex-direction: row;
    gap: 12px;
  }
  .price-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .model-explanation {
    flex-direction: column;
    gap: 10px;
  }
}