:root {
  --bg-gradient: radial-gradient(
      at 0% 0%,
      rgba(158, 126, 255, 0.15),
      transparent 45%
    ),
    radial-gradient(at 100% 0%, rgba(51, 180, 255, 0.2), transparent 40%),
    #0f172a;
  --card-surface: rgba(15, 23, 42, 0.6);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-highlight: rgba(255, 255, 255, 0.12);
  --text-primary: #f8fafc;
  --text-secondary: rgba(248, 250, 252, 0.75);
  --accent: #66f;
  --accent-soft: rgba(99, 102, 241, 0.2);
  --danger: #f97316;
  --success: #10b981;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.35);
  --radius-lg: 32px;
  --radius-md: 20px;
  --radius-sm: 12px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 32px 80px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page__header {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.brand__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(248, 250, 252, 0.08);
  color: rgba(248, 250, 252, 0.9);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.brand__title {
  margin: 0;
  font-size: clamp(1.8rem, 2.4vw + 1.1rem, 3rem);
  font-weight: 700;
  line-height: 1.15;
}

.brand__subtitle {
  margin: 0;
  max-width: 680px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.page__main {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.summary,
.calculator,
.breakdown {
  border-radius: var(--radius-lg);
  background: linear-gradient(
      145deg,
      rgba(15, 23, 42, 0.85),
      rgba(30, 41, 59, 0.75)
    );
  border: 1px solid var(--card-border);
  padding: 36px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.summary__headline h2,
.calculator__header h2,
.breakdown__header h2 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.summary__headline p,
.calculator__header p,
.breakdown__header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.98rem;
}

.summary__grid {
  margin-top: 28px;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.summary-card {
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  overflow: hidden;
}

.summary-card::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.3;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.12));
  mix-blend-mode: screen;
}

.summary-card h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.summary-card__metrics {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.metric {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}

.metric__label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.metric__value {
  font-size: 1.6rem;
  font-weight: 700;
}

.metric__value--small {
  font-size: 1.05rem;
  font-weight: 600;
}

.summary-card__copy {
  margin: 0;
  color: rgba(248, 250, 252, 0.7);
  font-size: 0.9rem;
  line-height: 1.5;
}

.delta-card {
  margin-top: 28px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--accent-soft);
  background: rgba(99, 102, 241, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.delta-card__label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(248, 250, 252, 0.72);
  margin-bottom: 6px;
}

.delta-card__value {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
}

.delta-card__copy {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.calculator__header {
  margin-bottom: 24px;
}

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

.category {
  border-radius: var(--radius-md);
  border: 1px solid rgba(248, 250, 252, 0.12);
  padding: 24px;
  background: rgba(148, 163, 184, 0.05);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.category__header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.category__title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.category__description {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.category__items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.item-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.6);
  padding: 18px 18px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.item-card:hover {
  border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.4);
}

.item-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.item-card__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(248, 250, 252, 0.65);
}

.item-card__description {
  margin: 0;
  color: rgba(248, 250, 252, 0.7);
  font-size: 0.88rem;
  line-height: 1.5;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.switch input[type='checkbox'] {
  appearance: none;
  width: 46px;
  height: 26px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.3);
  position: relative;
  transition: background 0.2s ease;
  cursor: pointer;
}

.switch input[type='checkbox']::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transform: translateX(0);
  transition: transform 0.2s ease;
}

.switch input[type='checkbox']:checked {
  background: rgba(99, 102, 241, 0.7);
}

.switch input[type='checkbox']:checked::after {
  transform: translateX(18px);
}

.switch__label {
  color: rgba(248, 250, 252, 0.7);
  font-size: 0.85rem;
}

.quantity {
  display: flex;
  align-items: center;
  gap: 12px;
}

.quantity label {
  color: rgba(248, 250, 252, 0.68);
  font-size: 0.82rem;
}

.quantity input[type='number'] {
  width: 80px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 6px 10px;
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-primary);
  font-size: 0.9rem;
  text-align: center;
}

.item-card__footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hour-stats {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.83rem;
  color: rgba(248, 250, 252, 0.68);
}

.hour-stats strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.breakdown__list {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.breakdown-item {
  border-radius: var(--radius-sm);
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(15, 23, 42, 0.55);
  padding: 18px;
  display: grid;
  gap: 10px;
}

.breakdown-item__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
}

.breakdown-item__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.breakdown-item__hours {
  margin: 0;
  display: flex;
  gap: 18px;
  font-size: 0.85rem;
  color: rgba(248, 250, 252, 0.7);
}

.breakdown-item__prices {
  display: flex;
  gap: 14px;
  font-size: 0.9rem;
  font-weight: 600;
}

.breakdown-item__description {
  margin: 0;
  color: rgba(248, 250, 252, 0.7);
  font-size: 0.85rem;
  line-height: 1.5;
}

.badge--qty {
  border-color: rgba(16, 185, 129, 0.35);
  color: rgba(16, 185, 129, 0.8);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease,
    border-color 0.18s ease;
}

.button--primary {
  background: linear-gradient(120deg, #6366f1, #8b5cf6);
  color: #fff;
  box-shadow: 0 16px 30px rgba(99, 102, 241, 0.35);
}

.button--primary:hover {
  transform: translateY(-2px);
}

.button--ghost {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.45);
  color: var(--text-primary);
}

.button--ghost:hover {
  background: rgba(148, 163, 184, 0.12);
}

.disclaimer {
  margin-top: 22px;
  color: rgba(248, 250, 252, 0.55);
  font-size: 0.8rem;
  line-height: 1.5;
}

.muted {
  color: rgba(248, 250, 252, 0.55);
  font-size: 0.9rem;
  margin: 0;
}

@media (max-width: 1024px) {
  .category__items {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .summary,
  .calculator,
  .breakdown {
    padding: 28px;
  }
}

@media (max-width: 768px) {
  .page {
    padding: 32px 24px 64px;
  }

  .page__header {
    text-align: left;
  }

  .delta-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .hour-stats {
    flex-direction: column;
    gap: 6px;
  }

  .breakdown-item__top,
  .breakdown-item__hours,
  .breakdown-item__prices {
    flex-direction: column;
    align-items: flex-start;
  }
}