/* ============================================
   JH GROUP CPA — 2025 Extension Payment Calculator
   Custom Dark Palette: Navy/Charcoal + Gold/Amber
   ============================================ */

:root {
  /* Font families */
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Type scale — fluid */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* 4px spacing system */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ============================================
   DARK MODE PALETTE (Primary)
   ============================================ */
[data-theme="dark"] {
  /* Surfaces — deep navy/charcoal */
  --color-bg:              #0f1729;
  --color-surface:         #1a2332;
  --color-surface-2:       #1e2a3a;
  --color-surface-offset:  #232f3e;
  --color-surface-offset-2: #2a3a4e;
  --color-surface-dynamic: #324560;
  --color-divider:         rgba(212, 168, 67, 0.12);
  --color-border:          rgba(255, 255, 255, 0.08);

  /* Text */
  --color-text:            #e8e6e1;
  --color-text-muted:      #8b95a5;
  --color-text-faint:      #556070;
  --color-text-inverse:    #0f1729;

  /* Primary Accent — Gold/Amber */
  --color-primary:         #d4a843;
  --color-primary-hover:   #c9952c;
  --color-primary-active:  #b8841f;
  --color-primary-highlight: rgba(212, 168, 67, 0.15);

  /* Semantic: Success */
  --color-success:         #4ade80;
  --color-success-hover:   #22c55e;
  --color-success-bg:      rgba(74, 222, 128, 0.08);

  /* Semantic: Error / Warning */
  --color-error:           #f87171;
  --color-error-bg:        rgba(248, 113, 113, 0.08);
  --color-warning:         #fbbf24;
  --color-warning-bg:      rgba(251, 191, 36, 0.08);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(212, 168, 67, 0.08);
}

/* Subtle page background depth */
body {
  background: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 20% 0%, rgba(212, 168, 67, 0.03) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(26, 35, 50, 0.5) 0%, transparent 60%);
  background-attachment: fixed;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 41, 0.85);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-bottom: 1px solid var(--color-divider);
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-mark {
  flex-shrink: 0;
  display: block;
  width: 40px;
  height: 40px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.logo-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--color-text);
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.logo-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.3;
}

.header-actions {
  display: flex;
  gap: var(--space-2);
}

.btn-reset,
.btn-print {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-reset:hover,
.btn-print:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}

.btn-reset:active,
.btn-print:active {
  transform: scale(0.97);
}

/* ============================================
   MAIN LAYOUT
   ============================================ */
.main-layout {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-6) var(--space-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 960px) {
  .main-layout {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-6);
    align-items: start;
  }

  .results-column {
    position: sticky;
    top: 80px;
    max-height: calc(100dvh - 100px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-surface-offset) transparent;
  }
}

@media (min-width: 1200px) {
  .main-layout {
    grid-template-columns: 480px 1fr;
  }
}

/* ============================================
   FORM SECTIONS
   ============================================ */
.form-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-5);
  margin-bottom: var(--space-4);
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 600;
  flex-shrink: 0;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
}

.form-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Fields */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.field label {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
}

.input-wrap {
  display: flex;
  align-items: center;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.input-wrap:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}

.input-prefix {
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  user-select: none;
  pointer-events: none;
}

.input-wrap input {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  font-variant-numeric: tabular-nums lining-nums;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  min-width: 0;
}

.input-wrap input:focus {
  outline: none;
}

.input-wrap input::placeholder {
  color: var(--color-text-faint);
}

select {
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238b95a5' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}

.field-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Section intro text */
.section-intro {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
  margin-top: calc(-1 * var(--space-2));
  max-width: 100%;
}

.section-intro strong {
  color: var(--color-text);
}

/* "Where to find this" callout */
.where-to-find {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-top: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: rgba(79, 152, 163, 0.08);
  border: 1px solid rgba(79, 152, 163, 0.2);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.where-to-find svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 1px;
}

.where-to-find strong {
  color: var(--color-text);
}

.line-ref {
  display: inline-block;
  padding: 1px 8px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* Welcome Banner */
.welcome-banner {
  background: linear-gradient(135deg, rgba(79, 152, 163, 0.1), rgba(212, 168, 67, 0.05));
  border-bottom: 1px solid var(--color-divider);
}

.welcome-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-8) var(--space-4) var(--space-6);
}

.welcome-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.welcome-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 700px;
}

.welcome-desc strong {
  color: var(--color-gold);
}

/* Toggle */
.field-toggle {
  padding-top: var(--space-1);
}

.toggle-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.toggle-text {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.toggle-switch {
  position: relative;
  display: inline-block;
}

.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  display: block;
  width: 44px;
  height: 24px;
  background: var(--color-surface-offset-2);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-interactive);
  cursor: pointer;
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: transform var(--transition-interactive), background var(--transition-interactive);
}

.toggle-switch input:checked + .toggle-track {
  background: var(--color-primary);
}

.toggle-switch input:checked + .toggle-track::after {
  transform: translateX(20px);
  background: var(--color-text-inverse);
}

.toggle-switch input:focus-visible + .toggle-track {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* CA Fields transition */
.ca-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

.ca-fields[hidden] {
  display: flex;
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  margin: 0;
}

.ca-fields:not([hidden]) {
  max-height: 400px;
  opacity: 1;
  pointer-events: auto;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-divider);
}

/* ============================================
   RESULTS COLUMN
   ============================================ */
.results-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.results-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.results-section[hidden] {
  display: none;
}

.results-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.results-title svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* Result cards */
.result-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.result-card {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.result-card.primary {
  border-left: 3px solid var(--color-primary);
}

.result-card.accent {
  background: var(--color-primary-highlight);
  border-color: rgba(212, 168, 67, 0.2);
}

.result-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
  line-height: 1.2;
  transition: color 0.3s ease;
}

.result-card.accent .result-value {
  color: var(--color-primary);
}

.result-sublabel {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* Penalty section */
.penalty-section {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-3);
}

.penalty-section h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-error);
  margin-bottom: var(--space-3);
}

.penalty-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.penalty-row:last-child {
  border-bottom: none;
}

.penalty-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  flex: 1;
  min-width: 0;
  padding-right: var(--space-2);
}

.penalty-value {
  font-size: var(--text-sm);
  font-weight: 600;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-error);
  white-space: nowrap;
}

/* ============================================
   PAYMENT SUMMARY CARD
   ============================================ */
.summary-card {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-offset) 100%);
  border: 1px solid rgba(212, 168, 67, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-glow);
}

.summary-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.summary-total {
  text-align: center;
  padding: var(--space-4) 0;
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}

.summary-total-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}

.summary-total-value {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums lining-nums;
  line-height: 1.1;
}

.summary-breakdown {
  margin-bottom: var(--space-4);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.summary-row span:last-child {
  font-weight: 600;
  color: var(--color-text);
}

.summary-meta {
  margin-bottom: var(--space-3);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.meta-item svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.meta-item strong {
  color: var(--color-text);
}

/* Payment links */
.payment-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.pay-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}

.pay-link {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
}

.pay-link:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.ca-pay-link[hidden] {
  display: none;
}

.disclaimer-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-style: italic;
  line-height: 1.5;
}

/* ============================================
   SCENARIO CARDS
   ============================================ */
.scenarios-section {
  margin-bottom: var(--space-4);
}

.scenario-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 600px) and (max-width: 959px) {
  .scenario-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.scenario-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
}

.scenario-card.conservative {
  border-top: 2px solid var(--color-success);
}

.scenario-card.standard {
  border-top: 2px solid var(--color-primary);
}

.scenario-card.aggressive {
  border-top: 2px solid var(--color-error);
}

.scenario-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-full);
  width: fit-content;
}

.scenario-badge.low {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.scenario-badge.medium {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

.scenario-badge.higher {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.scenario-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--color-text);
}

.scenario-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.scenario-amount {
  font-size: var(--text-lg);
  font-weight: 700;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-text);
}

.scenario-sublabel {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) var(--space-4);
  margin-top: var(--space-8);
}

.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-attribution {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-attribution:hover {
  color: var(--color-primary);
}

.footer-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 60ch;
  line-height: 1.5;
  margin-top: var(--space-2);
}

/* ============================================
   NUMBER ANIMATION
   ============================================ */
.result-value,
.summary-total-value,
.scenario-amount,
.penalty-value {
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.value-updating {
  transform: scale(1.02);
}

/* ============================================
   PRINT STYLES
   ============================================ */
.print-only {
  display: none;
}

@media print {
  .site-header,
  .form-column,
  .site-footer,
  .scenarios-section,
  .payment-links {
    display: none !important;
  }

  .print-only {
    display: block !important;
    padding: 2rem;
    color: #000;
    background: #fff;
  }

  .print-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #000;
  }

  .print-header h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
  }

  .print-header p {
    font-size: 0.875rem;
    color: #555;
  }

  .print-disclaimer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #ccc;
    font-size: 0.75rem;
    color: #666;
  }

  .results-column {
    position: static !important;
    max-height: unset !important;
    overflow: visible !important;
  }

  .main-layout {
    display: block !important;
  }

  .results-section,
  .summary-card {
    break-inside: avoid;
    page-break-inside: avoid;
    border-color: #ccc !important;
    box-shadow: none !important;
  }

  .result-value,
  .summary-total-value,
  .scenario-amount {
    color: #000 !important;
  }

  .result-card.accent {
    background: #f5f0e0 !important;
  }

  body {
    background: #fff !important;
    color: #000 !important;
  }
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 480px) {
  .header-inner {
    padding: var(--space-2) var(--space-3);
  }

  .logo-tagline {
    display: none;
  }

  .logo-name {
    font-size: var(--text-sm);
  }

  .form-section {
    padding: var(--space-4);
  }

  .results-section {
    padding: var(--space-4);
  }

  .summary-card {
    padding: var(--space-4);
  }

  .summary-total-value {
    font-size: var(--text-xl);
  }

  .result-value {
    font-size: var(--text-lg);
  }

  .penalty-label {
    font-size: 0.6875rem;
  }

  .btn-reset,
  .btn-print {
    padding: var(--space-2);
    font-size: 0.6875rem;
  }
}

/* CA results hidden */
.ca-results[hidden] {
  display: none;
}
.ca-summary-row[hidden] {
  display: none;
}

/* Active states for touch devices */
@media (hover: none) {
  .btn-reset:active,
  .btn-print:active,
  .pay-link:active {
    opacity: 0.7;
  }
}

/* ---- Quick Estimator Helper Panels ---- */

.helper-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-gold);
  cursor: pointer;
  border: 1px dashed rgba(212, 168, 67, 0.3);
  border-radius: var(--radius-md);
  background: rgba(212, 168, 67, 0.04);
  transition: all 0.2s;
  text-align: left;
  width: 100%;
}

.helper-toggle:hover {
  background: rgba(212, 168, 67, 0.1);
  border-color: rgba(212, 168, 67, 0.5);
}

.helper-toggle-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  color: var(--color-gold);
}

.helper-toggle-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.helper-toggle-text strong {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 600;
}

.helper-toggle-text .click-here {
  color: #5cb8ff;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 700;
}

.helper-toggle:hover .click-here {
  color: #7ec8ff;
}

.helper-toggle-text .quick-est {
  color: var(--color-primary);
  font-weight: 700;
}

.helper-toggle:hover .quick-est {
  color: var(--color-primary-hover);
}

.helper-toggle-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 400;
}

.helper-toggle .chevron-icon {
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.helper-toggle[aria-expanded="true"] .chevron-icon {
  transform: rotate(180deg);
}

.helper-panel {
  margin-top: var(--space-3);
  padding: var(--space-5);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  animation: helperSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.helper-panel[hidden] {
  display: none;
}

@keyframes helperSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.helper-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-gold);
  margin-bottom: var(--space-2);
}

.helper-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  max-width: 100%;
}

.helper-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (max-width: 600px) {
  .helper-grid {
    grid-template-columns: 1fr;
  }
}

.helper-field label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.helper-field .input-wrap {
  background: var(--color-surface);
}

.helper-field .field-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.helper-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: rgba(212, 168, 67, 0.08);
  border: 1px solid rgba(212, 168, 67, 0.2);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.helper-result-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.helper-result-value {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-gold);
  font-variant-numeric: tabular-nums lining-nums;
}

.helper-apply-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-gold);
  color: #0f1729;
  font-size: var(--text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  margin-bottom: var(--space-3);
}

.helper-apply-btn:hover {
  background: var(--color-gold-light);
}

.helper-apply-btn:active {
  transform: scale(0.98);
}

.helper-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.5;
  max-width: 100%;
}