/* ==========================================================================
   CalculatorHub - SIP Calculator Stylesheet
   Theme: CalculatorHub Light Master Design System
   Compatible with: styles.css tokens & components
   ========================================================================== */

/* --- Breadcrumbs --- */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.breadcrumb-link {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--text-subtle);
  font-size: 0.75rem;
}

.breadcrumb-current {
  color: var(--text-main);
  font-weight: 600;
}

/* --- Hero Intro --- */
.sip-hero {
  padding-top: 2.5rem;
  padding-bottom: 2rem;
  background: radial-gradient(circle at 50% -20%, rgba(37, 99, 235, 0.07) 0%, transparent 70%);
}

@media (max-width: 640px) {
  .sip-hero {
    padding-top: 1.75rem;
    padding-bottom: 1.5rem;
  }
}

.sip-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sip-page-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.65rem;
}

@media (max-width: 640px) {
  .sip-page-title {
    font-size: 1.875rem;
  }
}

.sip-page-subtitle {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.6;
}

/* --- Main Calculator Layout --- */
.sip-calc-section {
  padding-bottom: 3.5rem;
}

.sip-calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 1024px) {
  .sip-calc-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2.5rem;
  }
}

/* Card Shell */
.sip-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.875rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

@media (max-width: 640px) {
  .sip-card {
    padding: 1.25rem;
  }
}

.sip-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.sip-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sip-tag-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
}

/* Form Groups & Controls */
.sip-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sip-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.sip-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}

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

.sip-value-pill {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
}

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

.sip-affix {
  position: absolute;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
  user-select: none;
}

.sip-prefix {
  left: 1rem;
}

.sip-suffix {
  right: 1rem;
}

.sip-input-text {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  padding: 0.75rem 1rem;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
  min-height: 48px;
}

.sip-input-text:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

.has-prefix {
  padding-left: 2.25rem;
}

.has-suffix {
  padding-right: 2.75rem;
}

/* Range Slider */
.sip-range-slider {
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  margin-top: 0.25rem;
}

.sip-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #ffffff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.sip-range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: var(--primary-hover);
}

.sip-range-legend {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-subtle);
  font-weight: 500;
}

/* Step-Up Toggle Box */
.stepup-toggle-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.stepup-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stepup-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.stepup-badge-opt {
  font-size: 0.6875rem;
  font-weight: 700;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
}

.stepup-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Toggle Switch Button */
.switch-toggle {
  position: relative;
  width: 52px;
  height: 28px;
  background-color: #cbd5e1;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  padding: 2px;
  flex-shrink: 0;
}

.switch-toggle.is-active {
  background-color: var(--primary);
}

.switch-thumb {
  display: block;
  width: 24px;
  height: 24px;
  background-color: #ffffff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-fast);
}

.switch-toggle.is-active .switch-thumb {
  transform: translateX(24px);
}

/* Step-Up Presets */
.stepup-presets-row {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.25rem;
}

.stepup-preset-chip {
  flex: 1;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-body);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition-fast);
  min-height: 40px;
}

.stepup-preset-chip:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: #bfdbfe;
}

.stepup-preset-chip.is-active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Quick Examples Box */
.quick-examples-box {
  background-color: var(--bg-page);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.quick-examples-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.example-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.example-chip {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-body);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 38px;
}

.example-chip:hover {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: #bfdbfe;
  transform: translateY(-1px);
}

.example-chip-detail {
  font-size: 0.75rem;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  font-weight: 700;
}

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

.btn-calc-submit {
  flex: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.5rem;
  background-color: var(--primary);
  color: #ffffff;
  font-size: 1.0625rem;
  font-weight: 700;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  transition: all var(--transition-fast);
  min-height: 48px;
}

.btn-calc-submit:hover,
.btn-calc-submit:focus-visible {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

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

.btn-calc-reset {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.95rem 1rem;
  background-color: var(--bg-subtle);
  color: var(--text-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  min-height: 48px;
}

.btn-calc-reset:hover {
  background-color: #e2e8f0;
  color: var(--text-main);
}

/* --- Results Card (Right Column) --- */
.sip-results-card {
  display: flex;
  flex-direction: column;
}

.sip-main-result-box {
  background-color: var(--primary-light);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-lg);
  padding: 1.65rem 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.sip-result-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.sip-result-amount {
  font-size: 2.625rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-family: var(--font-sans);
}

@media (max-width: 480px) {
  .sip-result-amount {
    font-size: 2.125rem;
  }
}

.sip-result-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Stats Rows */
.sip-stats-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.sip-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.9375rem;
}

.sip-stat-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sip-stat-label {
  color: var(--text-muted);
}

.sip-stat-val {
  font-weight: 700;
  color: var(--text-main);
  font-family: var(--font-sans);
}

.sip-stat-val.returns {
  color: #10b981; /* Green accent for returns */
}

/* Visual Ratio Progress Bar */
.sip-ratio-wrapper {
  margin-top: 0.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.sip-ratio-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.ratio-legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.ratio-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

.ratio-dot.invested {
  background-color: var(--primary);
}

.ratio-dot.returns {
  background-color: #10b981;
}

.ratio-bar-track {
  display: flex;
  height: 10px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background-color: var(--bg-subtle);
}

.bar-segment-invested {
  background-color: var(--primary);
  transition: width 0.3s ease;
}

.bar-segment-returns {
  background-color: #10b981;
  transition: width 0.3s ease;
}

/* Step-Up Comparison Card (When Active) */
.stepup-comparison-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  margin-top: 1.25rem;
}

.stepup-cmp-header {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stepup-cmp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.cmp-column {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cmp-col-title {
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.25rem;
}

.cmp-val-highlight {
  font-weight: 700;
  color: var(--primary);
}

.cmp-diff-banner {
  margin-top: 0.65rem;
  padding: 0.5rem 0.75rem;
  background-color: var(--accent-green-light);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: #065f46;
  font-weight: 600;
  text-align: center;
}

/* Copy Summary Button */
.btn-calc-copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-body);
  margin-top: 1.25rem;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.btn-calc-copy:hover {
  background-color: #e2e8f0;
  color: var(--text-main);
}

/* --- Yearly Growth Table Section --- */
.growth-section {
  padding-top: 1rem;
  padding-bottom: 3.5rem;
}

.growth-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 640px) {
  .growth-card {
    padding: 1.25rem;
  }
}

.growth-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .growth-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.growth-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.table-responsive {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  display: block;
  scrollbar-width: thin;
  padding-bottom: 0.25rem;
}

.growth-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  text-align: right;
  font-size: 0.875rem;
}

.growth-table th,
.growth-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.growth-table th {
  background-color: var(--bg-page);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.growth-table th:first-child,
.growth-table td:first-child {
  text-align: left;
}

.growth-table tr:hover td {
  background-color: var(--primary-light);
}

.growth-table td {
  color: var(--text-body);
}

.sip-returns-col {
  color: #10b981;
  font-weight: 600;
}

.sip-highlight-balance {
  font-weight: 700;
  color: var(--text-main);
}

.btn-toggle-growth {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1.25rem;
  padding: 0.6rem 1.15rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

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

/* --- Educational & Content Cards --- */
.content-section {
  padding-bottom: 3.5rem;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .content-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.article-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

@media (max-width: 640px) {
  .article-card {
    padding: 1.35rem;
  }
}

.article-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.article-subheading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.5rem;
  margin-bottom: 0.35rem;
}

.article-p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-body);
}

/* Formula Box */
.formula-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  max-width: 100%;
}

.formula-display {
  font-family: var(--font-mono, monospace);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
  word-break: break-word;
  overflow-wrap: break-word;
}

.formula-vars-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.875rem;
  color: var(--text-body);
}

/* Steps List */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  counter-reset: sip-steps;
}

.step-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.step-number {
  counter-increment: sip-steps;
  width: 1.875rem;
  height: 1.875rem;
  border-radius: 50%;
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.step-text {
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.55;
}

/* Related Calculators Grid */
.related-section {
  padding-bottom: 4rem;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: var(--shadow-card-hover);
}

.related-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.related-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.related-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
  flex-grow: 1;
}

.related-action {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Disclaimer Box */
.disclaimer-card {
  background-color: var(--bg-page);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.55;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.disclaimer-card svg {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
  color: var(--accent-amber);
}

/* Responsive adjustments for compact screens (320px - 480px) */
@media (max-width: 480px) {
  .formula-display {
    font-size: 0.9375rem;
  }
  .stepup-cmp-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 440px) {
  .sip-actions-row {
    flex-direction: column;
  }
  .btn-calc-submit,
  .btn-calc-reset {
    width: 100%;
  }
}

@media (max-width: 360px) {
  .sip-card {
    padding: 1rem 0.875rem;
  }
  .sip-result-amount {
    font-size: 1.875rem;
  }
  .growth-card {
    padding: 1rem 0.75rem;
  }
  .formula-box {
    padding: 0.875rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .formula-display {
    font-size: 0.8125rem;
  }
}