/* Global Styles */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --bg-main: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --card-bg: #ffffff;
  --success-bg: #f0fdf4;
  --success-text: #166534;
  --success-border: #bbf7d0;
  --warning-bg: #fffbeb;
  --warning-text: #92400e;
  --warning-border: #fde68a;
  --error-bg: #fef2f2;
  --error-text: #991b1b;
  --error-border: #fee2e2;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  justify-content: center;
  padding: 3rem 1rem;
}

.page {
  width: 100%;
  max-width: 1000px;
  background: var(--card-bg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.page-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.025em;
  margin: 0;
}

/* Tabs Styling */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  background: #f1f5f9;
  padding: 0.4rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  scrollbar-width: none;
}

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

.tab-btn {
  flex: 1;
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.5);
}

.tab-btn.active {
  background: var(--card-bg);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Calculator Sections */
.calculator-section {
  display: none;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.calculator-section.active {
  display: block;
}

/* Card Styling */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  overflow: hidden;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: #cbd5e1;
}

.card-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  background: #f8fafc;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.card-body {
  padding: 1.5rem;
}

.card-body h2 {
  margin: 0 0 1.25rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hint {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.card-body > .hint {
  margin-bottom: 1.5rem;
}

/* Grid Layouts */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  align-items: end;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-current {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
}

.grid-cola {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Form Fields */
.field-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.field-block label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #475569;
}

input[type="text"],
input[type="number"],
input[type="date"],
select.form-select {
  width: 100% !important;
  max-width: 100% !important;
  box-sizing: border-box !important;
  appearance: none !important;
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  padding: 0.625rem 0.75rem;
  font-size: 0.9375rem;
  font-family: inherit;
  min-height: 2.75rem;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  outline: none;
  background-color: #ffffff;
  color: var(--text-main);
  transition: all 0.2s;
  display: block;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
select.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

input[readonly] {
  font-weight: 700;
  color: var(--success-text);
  background-color: var(--success-bg) !important;
  border-color: var(--success-border) !important;
  cursor: default;
}

.currency-input,
.percent-input {
  position: relative;
  display: flex;
  align-items: center;
}

.currency-prefix {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  pointer-events: none;
}

.currency-input input {
  padding-left: 1.6rem;
}

.percent-suffix {
  position: absolute;
  right: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  pointer-events: none;
}

.percent-input input {
  padding-right: 1.75rem;
}

/* Form Select Styling */
.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: right 0.75rem center !important;
  background-size: 1rem !important;
  padding-right: 2.5rem !important;
}

/* Pay Stubs Grid */
.pay-stubs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.stub-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 1.25rem;
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.2s;
}

.stub-row:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

/* Totals and Breakdowns */
.total-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.5rem;
  font-weight: 800;
  font-size: 1.25rem;
  margin-top: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.total-row label {
  color: var(--text-main);
}

.total-row input {
  width: 180px;
  font-size: 1.25rem;
  text-align: right;
}

.breakdown-info {
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  background-color: #f1f5f9;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: #334155;
  display: block;
  font-weight: 600;
}

.breakdown-info:empty {
  display: none !important;
}

.breakdown-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.breakdown-item span:first-child {
  color: #64748b;
  font-weight: 500;
}

.breakdown-item span:last-child {
  font-weight: 700;
  color: var(--text-main);
}

.breakdown-item:last-child {
  margin-bottom: 0;
  padding-top: 0.75rem;
  border-top: 1px dashed #cbd5e1;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  gap: 0.625rem;
}

.btn.primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.btn.primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn.outline {
  background-color: var(--card-bg);
  border: 1px solid #d1d5db;
  color: #374151;
}

.btn.outline:hover {
  background-color: #f9fafb;
  border-color: #9ca3af;
}

.btn i {
  font-size: 1rem;
}

.actions {
  display: flex;
  gap: 1rem;
  margin-top: 3rem;
  justify-content: flex-end;
}

/* Header specific field sizing */
.header-name {
  flex: 2;
  min-width: 300px;
}

.header-apt {
  flex: 1;
  min-width: 150px;
}

.header-date {
  flex: 1;
  min-width: 180px;
}

/* Date Warning Styling */
.date-warning {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background-color: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: var(--radius-md);
  color: var(--error-text);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.6;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.date-warning::before {
  content: '\f071';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 1.1rem;
}

.invalid-date {
  border-color: #ef4444 !important;
  background-color: #fff1f2 !important;
  color: #991b1b !important;
}

/* Responsive Styles */
@media (max-width: 768px) {
  body {
    padding: 1rem 0.5rem;
  }

  .page {
    padding: 1.5rem;
    border-radius: 0;
  }

  .page-header h1 {
    font-size: 1.75rem;
  }

  .tabs {
    flex-direction: column;
    padding: 0.4rem;
    gap: 0.25rem;
  }

  .tab-btn {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    text-align: center;
  }

  .grid,
  .grid-2,
  .grid-cola,
  .grid-current {
    grid-template-columns: 1fr !important;
    gap: 1rem;
  }

  .pay-stubs-grid {
    grid-template-columns: 1fr;
  }

  .stub-row {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .card-header {
    flex-direction: column;
    gap: 1rem;
    padding: 1.25rem;
  }

  .header-name,
  .header-apt,
  .header-date {
    min-width: 0;
    flex: auto;
  }

  .total-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .total-row input {
    width: 100%;
  }

  .actions {
    flex-direction: column-reverse;
    margin-top: 2rem;
  }

  .btn {
    width: 100%;
  }
}

/* Print Styles */
@media print {
  .no-print,
  .no-pdf {
    display: none !important;
  }

  body {
    background: white !important;
    padding: 0 !important;
  }

  .page {
    box-shadow: none !important;
    border: none !important;
    max-width: 100% !important;
    width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .card {
    break-inside: avoid;
    border: 1px solid #e2e8f0 !important;
    margin-bottom: 1rem !important;
  }

  .card-body {
    padding: 1rem !important;
  }

  .card-header {
    padding: 1rem !important;
    background: #f8fafc !important;
  }

  .grid {
    gap: 1rem !important;
  }

  .breakdown-info {
    margin-bottom: 1rem !important;
    padding: 1rem !important;
    background: #f1f5f9 !important;
  }

  .total-row {
    border-top: 1px solid #e2e8f0 !important;
    padding-top: 1rem !important;
  }

  .stub-row {
    background: transparent !important;
    border: 1px solid #e2e8f0 !important;
  }
}