:root {
  --primary: #da291c;
  --primary-active: #b01e0a;
  --primary-hover: #9d2211;
  --ink: #ffffff;
  --body: #969696;
  --body-strong: #ffffff;
  --body-on-light: #181818;
  --muted: #666666;
  --muted-soft: #8f8f8f;
  --hairline: #303030;
  --hairline-on-light: #d2d2d2;
  --hairline-soft: #ebebeb;
  --canvas: #181818;
  --canvas-elevated: #303030;
  --canvas-light: #ffffff;
  --surface-card: #303030;
  --surface-soft-light: #f7f7f7;
  --surface-strong-light: #ebebeb;
  --on-primary: #ffffff;
  --on-dark: #ffffff;
  --on-light: #181818;
  --semantic-info: #4c98b9;
  --semantic-success: #03904a;
  --semantic-warning: #f13a2c;

  --rounded-none: 0px;
  --rounded-xs: 2px;
  --rounded-sm: 4px;
  --rounded-full: 9999px;

  --spacing-xxxs: 4px;
  --spacing-xxs: 8px;
  --spacing-xs: 16px;
  --spacing-sm: 24px;
  --spacing-md: 32px;
  --spacing-lg: 48px;
  --spacing-xl: 64px;
  --spacing-xxl: 96px;
  --spacing-super: 128px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  background-color: var(--canvas);
  color: var(--body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
.display-mega {
  font-size: 80px;
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -1.6px;
  color: var(--ink);
}

.display-xl {
  font-size: 56px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -1.12px;
}

.display-lg {
  font-size: 36px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.36px;
  color: var(--ink);
}

.display-md {
  font-size: 26px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.195px;
  color: var(--ink);
}

.title-md {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

.body-md {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
}

.body-sm {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
}

.caption-uppercase {
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  color: var(--muted);
}

.number-display {
  font-size: 80px;
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -1.6px;
  color: var(--ink);
}

.text-ink { color: var(--ink); }
.text-muted { color: var(--muted); }

/* Components */
.top-nav-on-dark {
  background-color: var(--canvas);
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  align-items: center;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 1.4px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.65px;
  text-transform: uppercase;
  transition: color 0.2s;
}

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

.hero-band-cinema {
  background-color: var(--canvas);
  position: relative;
  height: 60vh;
  min-height: 500px;
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-super) var(--spacing-lg);
  background-image: linear-gradient(to top, rgba(24, 24, 24, 1) 0%, rgba(24, 24, 24, 0.2) 50%), url('https://images.unsplash.com/photo-1592853625601-bb11b570e6e6?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
}

.hero-content {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

.hero-content p {
  margin-top: var(--spacing-xs);
  color: var(--body);
}

.canvas {
  background-color: var(--canvas);
}

.converter-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-xxl) var(--spacing-lg);
  display: flex;
  justify-content: center;
}

.driver-card {
  background-color: var(--canvas-elevated);
  border-radius: var(--rounded-none);
  padding: var(--spacing-sm);
  width: 100%;
  max-width: 600px;
  border: 1px solid var(--hairline);
}

.driver-card .title-md {
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: var(--spacing-xs);
}

.converter-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xxs);
  flex: 1;
}

.currency-selectors {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-xs);
}

.text-input-on-dark {
  background-color: var(--canvas);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-sm);
  padding: 14px 16px;
  height: 48px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

select.text-input-on-dark {
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23ffffff%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 16px top 50%;
  background-size: 12px auto;
  padding-right: 40px;
}

.text-input-on-dark:focus {
  border-color: var(--primary);
}

.swap-btn {
  background-color: transparent;
  color: var(--ink);
  border: 1px solid var(--hairline);
  height: 48px;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: var(--rounded-sm);
  transition: all 0.2s;
  flex-shrink: 0;
}

.swap-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.result-container {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.spec-cell {
  padding: var(--spacing-sm) 0;
}

.button-primary {
  background-color: var(--primary);
  color: var(--on-primary);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  border: none;
  border-radius: var(--rounded-none);
  padding: 14px 32px;
  height: 48px;
  cursor: pointer;
  width: 100%;
  transition: background-color 0.2s;
}

.button-primary:hover {
  background-color: var(--primary-active);
}

.button-primary:active {
  background-color: var(--primary-hover);
}

.livery-band {
  background-color: var(--primary);
  padding: var(--spacing-xxl) var(--spacing-lg);
  text-align: center;
}

.livery-band .display-lg {
  color: var(--on-primary);
  margin-bottom: var(--spacing-xs);
}

.livery-band .body-md {
  color: rgba(255, 255, 255, 0.9);
}

.footer-dark {
  background-color: var(--canvas);
  padding: var(--spacing-xl) var(--spacing-lg);
  border-top: 1px solid var(--hairline);
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  gap: var(--spacing-md);
}

.footer-link {
  color: var(--body);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--ink);
}

@media (max-width: 640px) {
  .hero-band-cinema {
    height: 40vh;
    min-height: 300px;
    padding: var(--spacing-lg);
  }
  
  .display-mega {
    font-size: 40px; /* Reduced for mobile */
    letter-spacing: -0.8px;
  }
  
  .number-display {
    font-size: 48px;
    letter-spacing: -0.96px;
  }
  
  .currency-selectors {
    flex-direction: column;
    align-items: center;
  }
  
  .input-group {
    width: 100%;
  }
  
  .swap-btn {
    transform: rotate(90deg);
    margin: var(--spacing-xs) 0;
  }
  
  .nav-links {
    display: none; /* simple mobile handling */
  }
}

.time-toggle {
  background: transparent;
  color: var(--muted);
  border: none;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  cursor: pointer;
  transition: color 0.2s, background-color 0.2s;
  border-radius: var(--rounded-full);
}

.time-toggle.active, .time-toggle:hover {
  color: var(--on-primary);
  background-color: var(--primary);
}

/* Hide scrollbar for toggles */
.time-toggles::-webkit-scrollbar {
  display: none;
}
.time-toggles {
  -ms-overflow-style: none;
  scrollbar-width: none;
}