/**
 * CalculatorHub - Age Calculator Stylesheet
 * Scoped styling for the Age & Date of Birth Calculator.
 * Adheres strictly to the CalculatorHub Light Master Design System.
 */

/* ==========================================================================
   1. Hero & Breadcrumbs
   ========================================================================== */
.age-hero {
  padding: 2.5rem 0 1.75rem 0;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.age-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
}

.age-page-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.025em;
  margin-bottom: 0.65rem;
}

.age-page-subtitle {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.55;
}

@media (max-width: 640px) {
  .age-hero {
    padding: 1.75rem 0 1.25rem 0;
  }
  .age-page-title {
    font-size: 1.75rem;
  }
  .age-page-subtitle {
    font-size: 0.9375rem;
  }
}

/* ==========================================================================
   2. Interactive Age Calculator Layout
   ========================================================================== */
.age-calculator-section {
  padding: 2.5rem 0 3.5rem 0;
}

.age-calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 1040px;
  margin: 0 auto;
}

@media (min-width: 992px) {
  .age-calc-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

/* Form Card */
.age-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.age-card-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.age-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.age-card-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Input Fields */
.age-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.age-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.age-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.age-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-main);
}

.btn-inline-today {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-inline-today:hover {
  background-color: var(--primary);
  color: #ffffff;
}

.age-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.age-input-date {
  width: 100%;
  min-height: 48px;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-main);
  background-color: #ffffff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  outline: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.age-input-date:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

/* Error Alert */
.age-error-alert {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-lg);
  color: #b91c1c;
  font-size: 0.875rem;
  font-weight: 500;
  margin-top: 0.5rem;
}

.age-error-alert svg {
  flex-shrink: 0;
}

/* Quick Example Pills */
.age-examples-box {
  margin-top: 0.25rem;
  padding: 0.85rem 1rem;
  background-color: var(--bg-page);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
}

.age-examples-title {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.age-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.age-example-btn {
  display: inline-flex;
  align-items: center;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-body);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.age-example-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

/* Action Buttons */
.age-actions-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.btn-age-primary {
  flex: 1;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--primary);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
  transition: all var(--transition-fast);
}

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

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

.btn-age-secondary {
  width: 100%;
  min-height: 48px;
  padding: 0 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background-color: #ffffff;
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 600;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-age-secondary:hover {
  border-color: var(--text-muted);
  color: var(--text-main);
  background-color: var(--bg-page);
}

/* ==========================================================================
   3. Results Presentation
   ========================================================================== */
.age-results-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Primary Result Card */
.age-result-hero-box {
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
  border: 1.5px solid rgba(37, 99, 235, 0.25);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.age-result-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.age-res-label {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
}

.btn-copy-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-body);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-copy-sm:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* 3-Tier Age Numbers Display */
.age-numbers-display {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  text-align: center;
}

.age-unit-block {
  background-color: #ffffff;
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-lg);
  padding: 1rem 0.5rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.age-unit-val {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.age-unit-lbl {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Born On Banner */
.age-born-on-banner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.9rem;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-body);
}

.age-born-on-banner svg {
  color: var(--primary);
  flex-shrink: 0;
}

.age-leap-note {
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background-color: #f8fafc;
  border-left: 3px solid var(--primary);
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Next Birthday Card */
.age-next-bday-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.bday-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.bday-header-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.bday-countdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.bday-metric-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.85rem 1rem;
  text-align: center;
}

.bday-metric-val {
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.bday-metric-lbl {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bday-date-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.75rem;
}

.bday-greeting-banner {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.25rem;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 1px solid #f59e0b;
  border-radius: var(--radius-lg);
  color: #92400e;
  font-size: 1.25rem;
  font-weight: 800;
}

/* Supplementary Units Table / Grid */
.age-supp-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.supp-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.supp-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.supp-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-page);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.supp-row-label {
  font-weight: 500;
  color: var(--text-muted);
}

.supp-row-val {
  font-weight: 700;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 480px) {
  .age-numbers-display {
    gap: 0.4rem;
  }
  .age-unit-val {
    font-size: 1.625rem;
  }
  .bday-countdown-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   4. Educational & SEO Content Sections
   ========================================================================== */
.age-content-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
}

.age-article-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  max-width: 900px;
  margin: 0 auto;
}

.age-prose h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.015em;
  margin-top: 2rem;
  margin-bottom: 0.85rem;
}

.age-prose h2:first-child {
  margin-top: 0;
}

.age-prose p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.age-formula-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem;
  margin: 1.25rem 0;
  font-family: inherit;
}

.age-formula-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.age-formula-code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9375rem;
  color: var(--primary);
  font-weight: 600;
  background-color: #ffffff;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: inline-block;
  margin-bottom: 0.4rem;
}

.age-formula-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Worked Example Box */
.age-example-card {
  background: linear-gradient(135deg, #ffffff 0%, var(--bg-page) 100%);
  border: 1.5px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.age-example-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.age-example-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.age-example-step {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.5;
}

.age-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Privacy Callout */
.age-privacy-callout {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.25rem;
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-lg);
  color: #166534;
  margin: 2rem 0 0 0;
}

.age-privacy-callout svg {
  flex-shrink: 0;
  margin-top: 2px;
}

.age-privacy-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.age-privacy-desc {
  font-size: 0.875rem;
  line-height: 1.5;
  margin: 0;
}