/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  background: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 100%);
  min-height: 100%;
  scrollbar-width: none;
}

::-webkit-scrollbar {
  display: none;
}

body {
  background: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 100%);
  color: #e0e0e0;
  line-height: 1.6;
  min-height: 100vh;
  font-family: "Nunito", sans-serif;
}

/* ─── Container and layout ─── */

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 40px;
  padding: 30px 0;
}

/* #20: color fallback before gradient so text is never invisible */
/* #1: Bebas Neue for display headline */
header h1 {
  font-family: "Bebas Neue", sans-serif;
  font-size: 3rem;
  letter-spacing: 2px;
  color: #a78bfa;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}

header p {
  color: #a0a0a0;
  font-size: 1.1rem;
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  min-height: 600px;
}

/* ─── Cards ─── */

.form-card,
.results-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  /* #17: targeted transition + actual hover state */
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}

.form-card:hover,
.results-card:hover {
  border-color: rgba(102, 126, 234, 0.3);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45);
}

.form-card h2,
.results-card h2 {
  font-family: "Poppins", sans-serif;
  color: #ffffff;
  margin-bottom: 25px;
  font-size: 1.5rem;
  text-align: center;
}

/* ─── Form groups ─── */

.form-group {
  margin-bottom: 20px;
}

/* #1: Poppins for UI labels */
.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #ffffff;
  font-family: "Poppins", sans-serif;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(177, 176, 176, 0.2);
  border-radius: 10px;
  color: #ffffff;
  font-size: 1rem;
  font-family: "Nunito", sans-serif;
  transition:
    border-color 0.3s ease,
    background 0.3s ease,
    box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #667eea;
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-group input::placeholder {
  color: #808080;
}

.hourly-saved {
  border-color: #4ade80 !important;
  transition: border-color 0.4s ease;
}

/* #21: raised from #a0a0a0 (~3.8:1) to #b8b8b8 (~5.1:1) — WCAG AA */
.form-group small {
  display: block;
  margin-top: 5px;
  color: #b8b8b8;
  font-size: 0.85rem;
}

/* #6: Remove browser-default number spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}
input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

/* #7: Custom select arrow */
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a0a0a0' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
  cursor: pointer;
}

/* #5: Inline form error */
.form-error {
  display: none;
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid rgba(255, 107, 107, 0.3);
  border-radius: 8px;
  color: #ff8a8a;
  font-size: 0.9rem;
  padding: 10px 14px;
  margin-bottom: 16px;
}
.form-error.visible {
  display: block;
}

/* ─── Pay type toggle ─── */

.pay-type-toggle {
  display: flex;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 4px;
  gap: 4px;
}

.pay-type-toggle input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.toggle-label {
  flex: 1;
  padding: 10px 16px;
  margin-bottom: 0 !important;
  text-align: center;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: #a0a0a0;
  font-family: "Poppins", sans-serif;
  font-weight: 500;
  font-size: 0.9rem;
}

.pay-type-toggle input[type="radio"]:checked + .toggle-label {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  transform: translateY(-1px);
}

.pay-type-toggle input[type="radio"]:focus + .toggle-label {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

.pay-type-toggle input[type="radio"]:focus:not(:focus-visible) + .toggle-label {
  outline: none;
}

/* ─── Pay inputs ─── */

.pay-inputs {
  transition: opacity 0.3s ease;
}

.pay-inputs.hidden {
  display: none;
}

/* ─── Deductions accordion ─── */

.deductions-section {
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* #19: h3 is now a button trigger */
.deductions-toggle {
  width: 100%;
  background: none;
  border: none;
  color: #ffffff;
  font-family: "Poppins", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 4px;
}

.deductions-toggle:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
  border-radius: 6px;
}

.optional-label {
  color: #a0a0a0;
  font-size: 0.8rem;
  font-weight: 400;
  margin-left: 6px;
}

.deductions-chevron {
  color: #a0a0a0;
  flex-shrink: 0;
  transition:
    transform 0.3s ease,
    color 0.2s ease;
}

.deductions-section.open .deductions-chevron {
  transform: rotate(180deg);
  color: #a78bfa;
}

.deductions-body {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height 0.35s ease,
    opacity 0.3s ease;
}

.deductions-section.open .deductions-body {
  max-height: 1200px;
  opacity: 1;
}

/* ─── Calculate button ─── */

.calculate-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  font-family: "Poppins", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
  margin-top: 30px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.calculate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

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

/* #18: keyboard focus ring for the CTA */
.calculate-btn:focus-visible {
  outline: 2px solid #a78bfa;
  outline-offset: 3px;
}

/* #4: Keyboard shortcut hints */
.keyboard-hints {
  text-align: center;
  margin-top: 12px;
  color: #808080;
  font-size: 0.78rem;
}

.keyboard-hints kbd {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: inherit;
  font-size: 0.75rem;
  color: #c0c0c0;
}

/* ─── Financial tips ─── */

.financial-tips {
  text-align: center;
}

.financial-tips h2 {
  color: #ffffff;
  margin-bottom: 25px;
  font-size: 1.5rem;
  font-family: "Poppins", sans-serif;
}

.tip-content {
  padding: 30px;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.1) 0%,
    rgba(118, 75, 162, 0.1) 100%
  );
  border-radius: 15px;
  border: 1px solid rgba(102, 126, 234, 0.2);
}

.tip-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #e0e0e0;
  margin-bottom: 15px;
}

.tip-content .tip-category {
  display: inline-block;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  padding: 6px 12px;
  border-radius: 20px;
  font-family: "Poppins", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 10px;
}

/* #10: Next tip button */
.next-tip-btn {
  display: block;
  margin: 20px auto 0;
  background: none;
  border: 1px solid rgba(102, 126, 234, 0.35);
  border-radius: 20px;
  color: #a78bfa;
  font-family: "Poppins", sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.next-tip-btn:hover {
  background: rgba(102, 126, 234, 0.12);
  border-color: rgba(102, 126, 234, 0.6);
  color: #c4b5fd;
}

.next-tip-btn:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* ─── Results panel ─── */

.calculation-results.hidden {
  display: none;
}

.calculation-results {
  animation: fadeIn 0.5s ease;
}

/* #3: Results header — h2 + reset button in one row */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 25px;
}

.results-header h2 {
  text-align: left;
  margin-bottom: 0;
  font-size: 1.4rem;
}

/* #3: Reset button */
.reset-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  color: #a0a0a0;
  font-family: "Poppins", sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.reset-btn:hover {
  background: rgba(255, 107, 107, 0.12);
  border-color: rgba(255, 107, 107, 0.3);
  color: #ff8a8a;
}

.reset-btn:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* ─── Net pay hero ─── */

.net-pay {
  text-align: center;
  margin-bottom: 40px;
  padding: 30px;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.15) 0%,
    rgba(118, 75, 162, 0.15) 100%
  );
  border-radius: 20px;
  border: 2px solid rgba(102, 126, 234, 0.3);
}

/* #2: On-theme soft green instead of electric #00e432 */
/* #1: Bebas Neue for the big display number */
.net-pay-amount {
  font-family: "Bebas Neue", sans-serif;
  font-size: 4rem;
  letter-spacing: 1px;
  color: #4ade80;
  margin-bottom: 10px;
}

.net-pay-amount .currency {
  font-size: 2.8rem;
  opacity: 0.8;
}

.pay-period {
  color: #a0a0a0;
  font-size: 1.1rem;
  font-family: "Poppins", sans-serif;
  font-weight: 500;
}

/* #11: pay-warning as a CSS class instead of inline styles */
.pay-warning {
  display: none;
  color: #ff8a8a;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}
.pay-warning.visible {
  display: block;
}

.net-pay.negative {
  border-color: rgba(255, 107, 107, 0.5);
  background: linear-gradient(
    135deg,
    rgba(255, 107, 107, 0.1) 0%,
    rgba(200, 50, 50, 0.1) 100%
  );
}

.net-pay.negative .net-pay-amount {
  color: #ff8a8a;
}

/* ─── Breakdown ─── */

.breakdown {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 15px;
  padding: 25px;
}

/* #8: breakdown header — h3 + annual toggle in one row */
.breakdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 25px;
}

.breakdown-toggle {
  background: none;
  border: none;
  color: #ffffff;
  font-family: "Poppins", sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0;
}

.breakdown-toggle-label {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.expand-hint {
  font-size: 0.72rem;
  font-weight: 400;
  color: #808080;
  letter-spacing: 0;
}

.breakdown-toggle[aria-expanded="true"] .expand-hint {
  display: none;
}

.breakdown-toggle:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
  border-radius: 4px;
}

.breakdown-chevron {
  color: #a0a0a0;
  flex-shrink: 0;
  transition:
    transform 0.3s ease,
    color 0.2s ease;
}

.breakdown-toggle[aria-expanded="true"] .breakdown-chevron {
  transform: rotate(180deg);
  color: #a78bfa;
}

.breakdown-sections {
  overflow: hidden;
  max-height: 2000px;
  opacity: 1;
  transition:
    max-height 0.4s ease,
    opacity 0.3s ease;
}

.breakdown-sections.collapsed {
  max-height: 0;
  opacity: 0;
}

/* #8: period toggle button */
.period-toggle-btn {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  color: #a0a0a0;
  font-family: "Poppins", sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.period-toggle-btn:hover {
  background: rgba(102, 126, 234, 0.15);
  border-color: rgba(102, 126, 234, 0.4);
  color: #ffffff;
}

.period-toggle-btn:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

.period-toggle-btn.annual-active {
  background: rgba(102, 126, 234, 0.2);
  border-color: rgba(102, 126, 234, 0.5);
  color: #a78bfa;
}

.breakdown-section {
  margin-bottom: 25px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  border-left: 4px solid transparent;
  animation: fadeIn 0.6s ease;
}

/* #16: Semantic color assignments — nothing is red for normal tax lines */
.breakdown-section:nth-child(2) {
  border-left-color: #4ade80;
} /* gross income  → green */
.breakdown-section:nth-child(3) {
  border-left-color: #60a5fa;
} /* pre-tax ded.  → blue */
.breakdown-section:nth-child(4) {
  border-left-color: #fbbf24;
} /* federal tax   → amber */
.breakdown-section:nth-child(5) {
  border-left-color: #fb923c;
} /* state/local   → orange (not red) */
.breakdown-section:nth-child(6) {
  border-left-color: #a78bfa;
} /* post-tax      → purple */

.breakdown-section h4 {
  color: #ffffff;
  font-family: "Poppins", sans-serif;
  margin-bottom: 15px;
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.breakdown-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.breakdown-item:last-child {
  border-bottom: none;
}

.breakdown-item span:first-child {
  color: #c8c8c8;
  font-size: 0.92rem;
}

.breakdown-item span:last-child {
  font-weight: 600;
  color: #ffffff;
  font-family: "Poppins", sans-serif;
  font-size: 0.92rem;
}

.breakdown-item.taxable {
  background: rgba(102, 126, 234, 0.1);
  margin: 10px -10px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid rgba(102, 126, 234, 0.3);
}

/* ─── Summary ─── */

.summary {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 2px solid rgba(255, 255, 255, 0.15);
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  font-size: 1rem;
}

.summary-item.net {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.2) 0%,
    rgba(118, 75, 162, 0.2) 100%
  );
  margin: 15px -15px -15px;
  padding: 20px 15px;
  border-radius: 12px;
  font-size: 1.2rem;
  font-weight: 700;
  font-family: "Poppins", sans-serif;
}

.summary-item.net span:first-child {
  color: #ffffff;
}

/* #9: Effective rate shown in theme purple */
.summary-item.net span:last-child {
  color: #a78bfa;
  font-size: 1.4rem;
}

/* ─── Mobile tabs (visible only at ≤1024px) ─── */

.mobile-tabs {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 20px;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: #a0a0a0;
  font-family: "Poppins", sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.tab-btn.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
}

.tab-btn:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* ─── Responsive ─── */

@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .form-card,
  .results-card {
    padding: 25px;
  }

  header h1 {
    font-size: 2.4rem;
  }

  .net-pay-amount {
    font-size: 3.2rem;
  }

  /* #14: Tab-based panel switching on mobile */
  .mobile-tabs {
    display: flex;
  }

  .main-content.show-inputs .results-section {
    display: none;
  }

  .main-content.show-results .input-section {
    display: none;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 12px;
  }

  .form-card,
  .results-card {
    padding: 18px;
  }

  /* #15: Reduce header vertical footprint on mobile */
  header {
    padding: 14px 0;
    margin-bottom: 18px;
  }

  header h1 {
    font-size: 2rem;
  }

  /* Hide subtitle on small screens — it's not actionable */
  header p {
    display: none;
  }

  .net-pay-amount {
    font-size: 2.8rem;
  }

  .breakdown-section {
    padding: 15px;
    margin-bottom: 18px;
  }

  .breakdown {
    padding: 0;
    background: none;
  }

  .results-header h2 {
    font-size: 1.2rem;
  }
}

/* ─── Animations ─── */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}