:root {
  --color-primary: #0a65d1;
  --color-primary-light: #e6f0fa;
  --color-text-primary: #1e293b;
  --color-text-secondary: #475569;
  --color-border: #cbd5e1;
  --color-bg-light: #f8fafc;
  --color-bg-white: #ffffff;
  --color-bg-subtle: #f1f5f9;
}

/* Base Styles */
#pace-calculator {
  max-width: 1290px;
  margin: 0 auto;
  padding: 0; /* Remove container padding as requested */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.calculator-body {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 896px; /* max-w-5xl from tailwind */
  margin: 2rem auto 0; /* Add top margin for spacing */
}

.calculator-form-section,
.results-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Goal Selector */
.input-section-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.goal-selector {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  border-radius: 0.75rem;
  background-color: var(--color-bg-subtle);
  padding: 0.25rem;
}

@media (min-width: 640px) {
  .goal-selector {
    grid-template-columns: repeat(3, 1fr);
  }
}

.goal-btn {
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0.5rem;
  border: none;
  background-color: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-align: center;
}

.goal-btn:hover {
  background-color: #e2e8f0;
}

.goal-btn.active {
  background-color: var(--color-bg-white);
  color: var(--color-primary);
  box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
}

/* Form Styles */
.input-form {
  padding: 1.5rem;
  background-color: var(--color-bg-white);
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.input-group, .time-input-group {
  display: flex;
}

.time-input-group {
  gap: 0.5rem;
  align-items: center;
}

.form-input, .form-select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  background-color: var(--color-bg-white);
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(10, 101, 209, 0.2);
}

.form-input:disabled, .form-select:disabled {
  background-color: var(--color-bg-subtle);
  cursor: not-allowed;
  opacity: 0.7;
}

.input-group .form-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
}

.input-group .form-select {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  background-color: var(--color-bg-subtle);
  width: auto;
}

.time-input-group .form-input {
  text-align: center;
}

.time-separator {
  color: var(--color-border);
  font-weight: bold;
}

.time-input {
  border-radius: 0;
  text-align: center;
}

.time-input:first-of-type {
  border-top-left-radius: 0.375rem;
  border-bottom-left-radius: 0.375rem;
}

.time-separator-input {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 0.5rem;
    background-color: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-border);
    font-weight: bold;
}

/* Buttons */
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0.375rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  width: 100%;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}
.btn-primary:hover {
  background-color: #0854b1;
}

.btn-secondary {
  background-color: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background-color: #e2e8f0;
}

/* Predictor Card */
.predictor-card {
  padding: 1.5rem;
  background-color: var(--color-primary-light);
  border-radius: 0.75rem;
  border: 1px solid #b3cff1;
}
.predictor-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #1e3a8a;
  margin: 0 0 0.25rem 0;
}
.predictor-description {
  font-size: 0.875rem;
  color: #1d4ed8;
  margin: 0 0 1rem 0;
}
.predictor-inputs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: end;
}
@media (min-width: 640px) {
  .predictor-inputs {
      grid-template-columns: 1fr 1fr;
  }
}
.predictor-buttons {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
}

/* Results */
.result-card {
  padding: 1.5rem;
  text-align: center;
  background-color: var(--color-bg-white);
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}
.result-card-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin: 0;
}
.result-card-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.025em;
  margin: 0.25rem 0;
}
.result-card-description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
  text-transform: capitalize;
}
.btn-print {
  width: auto;
  margin-top: 1.5rem;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}
.btn-print:hover {
  background-color: #dbeafe;
}
.btn-print svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Tables */
.results-table-container {
  background-color: var(--color-bg-white);
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  padding: 1.5rem;
}
.results-table-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 1rem 0;
}
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
}
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.results-table th, .results-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.results-table thead {
  background-color: var(--color-bg-subtle);
}
.results-table th {
  font-weight: 600;
  color: var(--color-text-primary);
}
.results-table tbody tr:last-child td {
  border-bottom: none;
}
.results-table tbody tr:nth-child(even) {
  background-color: var(--color-bg-light);
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Print Styles */
@media print {
  body {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .no-print {
    display: none !important;
  }
  .print-container, .results-table-container {
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .print-break-inside-avoid {
    break-inside: avoid;
  }
  #pace-calculator {
    max-width: 100%;
  }
}