:root {
  --bg: #f3f6ff;
  --surface: #ffffff;
  --surface-soft: #f8faff;
  --text: #0f172a;
  --muted: #5b6478;
  --primary: #315efb;
  --primary-soft: #dbe5ff;
  --success: #1fa67a;
  --danger: #e15b64;
  --shadow: 0 18px 40px rgba(26, 45, 90, 0.12);
  --radius-lg: 20px;
  --radius-md: 14px;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #e7edff, var(--bg) 36%);
}

.app-shell {
  display: grid;
  place-items: center;
  padding: 1rem;
}

.card {
  width: min(1080px, 100%);
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.1rem;
}

.card-header {
  padding: 0.4rem 0.2rem 1rem;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1.15;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

h3 {
  margin: 0 0 0.75rem;
  font-size: 0.98rem;
}

.subtitle {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--surface-soft);
  border-radius: var(--radius-md);
  padding: 1rem;
}

/* Premium themed scrollbar for calculator panels */
.panel {
  scrollbar-width: thin;
  scrollbar-color: rgba(76, 110, 245, 0.62) rgba(232, 239, 255, 0.55);
}

.panel::-webkit-scrollbar {
  width: 11px;
}

.panel::-webkit-scrollbar-track {
  background: linear-gradient(
    180deg,
    rgba(239, 244, 255, 0.72) 0%,
    rgba(226, 236, 255, 0.55) 100%
  );
  border-radius: 999px;
  border: 1px solid rgba(188, 206, 255, 0.45);
  backdrop-filter: blur(2px);
}

.panel::-webkit-scrollbar-thumb {
  background: linear-gradient(
    180deg,
    rgba(129, 157, 255, 0.88) 0%,
    rgba(71, 108, 245, 0.78) 100%
  );
  border-radius: 999px;
  border: 2px solid rgba(237, 243, 255, 0.85);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.35),
    0 2px 8px rgba(72, 104, 219, 0.22);
}

.panel::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(
    180deg,
    rgba(113, 144, 255, 0.94) 0%,
    rgba(56, 95, 240, 0.9) 100%
  );
}

.field {
  margin-bottom: 0.95rem;
}

.field label,
legend {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.field span {
  color: var(--muted);
  font-weight: 500;
}

select,
input[type="range"] {
  width: 100%;
}

input[type="number"] {
  width: 100%;
  border: 1px solid #d5def4;
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  padding: 0.67rem 0.75rem;
  font: inherit;
}

select {
  border: 1px solid #d5def4;
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  padding: 0.67rem 0.75rem;
  font: inherit;
}

select:focus-visible,
input:focus-visible {
  outline: 2px solid #a7bcff;
  outline-offset: 1px;
}

.slider-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  align-items: center;
}

.pill {
  display: inline-block;
  background: #fff;
  border: 1px solid #d5def4;
  border-radius: 999px;
  min-width: 88px;
  text-align: center;
  padding: 0.38rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
}

input[type="range"] {
  accent-color: var(--primary);
}

fieldset {
  border: 1px solid #dbe2f8;
  border-radius: 12px;
  padding: 0.75rem;
}

.toggle-group {
  display: grid;
  gap: 0.55rem;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.compare-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 600;
  margin: 0.4rem 0 0.7rem;
}

.comparison,
.comparison-results {
  background: #edf2ff;
  border: 1px solid #d9e4ff;
  border-radius: 12px;
  padding: 0.75rem;
}

.comparison p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.mobile-results-cta {
  margin-top: 0.4rem;
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 0.8rem 0.95rem;
  font: inherit;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, #4a76ff 0%, #315efb 100%);
  box-shadow: 0 10px 22px rgba(49, 94, 251, 0.26);
  cursor: pointer;
}

.mobile-results-cta:active {
  transform: translateY(1px);
}

.accuracy-note {
  margin: 0.55rem 0 0;
  font-size: 0.8rem;
  color: #4d5f95;
  font-weight: 600;
}

.advanced-options {
  border: 1px solid #d8e3ff;
  border-radius: 12px;
  padding: 0.7rem;
  margin-bottom: 0.9rem;
  background: #f3f7ff;
}

.advanced-options summary {
  cursor: pointer;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.advanced-options[open] summary {
  margin-bottom: 0.95rem;
}

.compact-details summary {
  margin-bottom: 0;
}

.compact-details[open] summary {
  margin-bottom: 0.75rem;
}

.advanced-subsection {
  border: 1px solid #dbe2f8;
  border-radius: 10px;
  padding: 0.55rem;
  background: #f8fbff;
  margin-bottom: 0.75rem;
}

.advanced-subsection summary {
  cursor: pointer;
  font-weight: 600;
}

.advanced-subsection[open] summary {
  margin-bottom: 0.65rem;
}

.inline-grid {
  display: grid;
  gap: 0.65rem;
}

.inline-grid label {
  margin-bottom: 0;
}

.hidden {
  display: none;
}

.stats {
  display: grid;
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.stat {
  border: 1px solid #dce4f8;
  background: #fff;
  border-radius: 12px;
  padding: 0.72rem 0.78rem;
}

.validation-alert {
  margin-bottom: 0.75rem;
  border: 1px solid #ffd7db;
  background: #fff3f4;
  color: #8a2430;
  border-radius: 12px;
  padding: 0.65rem 0.72rem;
  font-size: 0.85rem;
  line-height: 1.35;
}

.stat-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.stat-value {
  margin: 0.3rem 0 0;
  font-size: 1.15rem;
  font-weight: 800;
}

.breakdown {
  margin-bottom: 1rem;
}

.bar-track {
  height: 18px;
  border-radius: 999px;
  overflow: hidden;
  display: flex;
  background: #e7edff;
}

.bar {
  height: 100%;
  transition: width 220ms ease;
}

.bar.net {
  background: linear-gradient(90deg, #2ab384, var(--success));
}

.bar.tax {
  background: linear-gradient(90deg, #f37f86, var(--danger));
}

.bar-legend {
  margin-top: 0.45rem;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.84rem;
}

.details ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.details li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid #dfE6f8;
  padding: 0.52rem 0;
  font-size: 0.92rem;
}

.details li:last-child {
  border-bottom: none;
}

.insight {
  margin-top: 0.9rem;
  background: var(--primary-soft);
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
  color: #1d2b5f;
  font-weight: 600;
  line-height: 1.35;
}

.comparison-results {
  margin-top: 0.85rem;
}

#comparisonText {
  margin: 0;
  color: #1d2b5f;
  font-weight: 600;
}

.methodology {
  margin-top: 0.9rem;
  background: #f3f7ff;
  border: 1px solid #d8e3ff;
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
}

.methodology summary {
  cursor: pointer;
  font-weight: 700;
}

#methodologyIntro {
  margin: 0.7rem 0 0.45rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.methodology-list {
  margin: 0;
  padding-left: 1rem;
  color: #1d2b5f;
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
}

@media (max-width: 899px) {
  .app-shell {
    padding: 0.65rem;
  }

  .card {
    padding: 0.8rem;
    border-radius: 16px;
  }

  .card-header {
    padding: 0.2rem 0.1rem 0.7rem;
  }

  .subtitle {
    font-size: 0.9rem;
  }

  .grid {
    gap: 0.75rem;
  }

  .panel {
    padding: 0.8rem;
  }

  .field {
    margin-bottom: 0.75rem;
  }

  select,
  input[type="number"] {
    padding: 0.58rem 0.68rem;
    font-size: 0.95rem;
  }

  .pill {
    min-width: 80px;
    font-size: 0.8rem;
  }
}

@media (min-width: 900px) {
  body {
    overflow: hidden;
  }

  .app-shell {
    height: 100vh;
    padding: 0.75rem;
  }

  .card {
    height: calc(100vh - 1.5rem);
    padding: 1.35rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .grid {
    grid-template-columns: 1.02fr 1fr;
    min-height: 0;
    flex: 1;
  }

  .panel {
    padding: 1.15rem;
    overflow: auto;
    min-height: 0;
  }

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

  .mobile-results-cta {
    display: none;
  }
}