/* ============================================
   CalcHeaven — Polish Sprint 1
   Presentation only. No workflow/calc changes.
   ============================================ */

:root {
  --ch-radius-xl: 28px;
  --ch-radius-lg: 18px;
  --ch-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --ch-shadow-md: 0 6px 22px rgba(15, 23, 42, 0.07);
  --ch-shadow-lg: 0 14px 44px rgba(15, 23, 42, 0.09);
  --ch-shadow-hover: 0 10px 28px rgba(15, 23, 42, 0.09);
  --ch-ai-glow: 0 0 0 1px rgba(37, 99, 235, 0.12), 0 8px 28px rgba(37, 99, 235, 0.08);
}

/* ——— Section reveal (JS adds --wait only when offscreen) ——— */
.ch-reveal {
  transition:
    opacity 0.55s var(--ch-ease),
    transform 0.55s var(--ch-ease);
}
.ch-reveal.ch-reveal--wait {
  opacity: 0;
  transform: translateY(14px);
  will-change: opacity, transform;
}
.ch-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  will-change: auto;
}

/* ——— Typography hierarchy polish ——— */
.section-header h2,
.ai-assume-header .ch-title,
.ga-plan-hero .ch-title {
  letter-spacing: var(--ch-tracking-tight);
  line-height: var(--ch-leading-tight);
}
.section-header p,
.ai-assume-header .ch-subtitle,
.ga-plan-hero .ch-subtitle {
  max-width: 40rem;
  line-height: 1.65;
}
.page-hero h1 {
  letter-spacing: -0.03em;
}

/* ——— Spacing consistency ——— */
.section {
  padding-block: clamp(3.75rem, 6vw, 5.5rem);
}
.section-header {
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}
.section-header h2 {
  margin-bottom: 0.65rem;
}
.ga-shell {
  gap: var(--ch-space-6);
}
.ga-main {
  gap: var(--ch-space-5);
  min-height: 22rem; /* reduce jump between steps */
}
.ga-step-panel,
.ga-summary {
  border-radius: var(--ch-radius-xl);
  box-shadow: var(--ch-shadow-sm);
  transition:
    opacity 0.35s var(--ch-ease),
    transform 0.35s var(--ch-ease),
    box-shadow var(--ch-duration) var(--ch-ease);
}
.ga-main.is-step-enter .ga-step-panel,
.ga-main.is-step-enter .ga-summary {
  animation: chPolishStepIn 0.4s var(--ch-ease) both;
}
@keyframes chPolishStepIn {
  from {
    opacity: 0.35;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ——— Buttons: gentle hover ——— */
.btn {
  transition:
    background var(--ch-duration) var(--ch-ease),
    color var(--ch-duration) var(--ch-ease),
    border-color var(--ch-duration) var(--ch-ease),
    box-shadow var(--ch-duration) var(--ch-ease),
    transform var(--ch-duration-fast) var(--ch-ease);
}
.btn:hover:not(:disabled):not(.is-loading) {
  transform: translateY(-1px);
}
.btn:active:not(:disabled) {
  transform: translateY(0) scale(0.985);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.28);
}
.btn-ai:hover:not(:disabled) {
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}
.btn-secondary:hover:not(:disabled),
.btn-outline:hover:not(:disabled) {
  box-shadow: var(--ch-shadow-sm);
}

/* ——— Cards: elevation + radius ——— */
.ch-card,
.ai-assume-card,
.ga-plan-metric,
.ga-plan-rec,
.life-toolkit-card,
.related-card,
.toolkit-hero-outcome-card {
  border-radius: var(--ch-radius-xl);
  transition:
    border-color var(--ch-duration) var(--ch-ease),
    box-shadow var(--ch-duration) var(--ch-ease),
    transform var(--ch-duration) var(--ch-ease);
}
.ch-card--interactive:hover,
.ch-card--ai-assumption:hover,
.ai-assume-card:hover,
.life-toolkit-card:hover,
.related-card:hover,
.ga-plan-rec:hover {
  transform: translateY(-3px);
  box-shadow: var(--ch-shadow-hover);
  border-color: rgba(37, 99, 235, 0.22);
}

/* ——— AI recommendation distinct + soft glow ——— */
.ch-ai-recommend,
.ch-ai-recommendation,
.ga-plan-rec,
.ch-card--ai-recommend,
.ai-assume-card {
  position: relative;
  border-color: rgba(37, 99, 235, 0.18);
  background:
    linear-gradient(180deg, rgba(239, 246, 255, 0.85), var(--ch-color-surface));
  box-shadow: var(--ch-ai-glow);
}
.ch-ai-recommend,
.ch-ai-recommendation,
.ga-plan-rec,
.ch-card--ai-recommend {
  padding-left: calc(1.1rem + 3px);
}
.ch-ai-recommend::before,
.ch-ai-recommendation::before,
.ga-plan-rec::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  bottom: 0.65rem;
  width: 3px;
  border-radius: var(--ch-radius-pill);
  background: linear-gradient(180deg, var(--ch-color-primary), #93c5fd);
}
.ch-ai-recommend:hover,
.ch-ai-recommendation:hover,
.ga-plan-rec:hover {
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.18), 0 12px 32px rgba(37, 99, 235, 0.12);
}
.ch-ai-insight {
  box-shadow: var(--ch-shadow-sm);
  transition: box-shadow var(--ch-duration) var(--ch-ease), transform var(--ch-duration) var(--ch-ease);
}
.ch-ai-insight:hover {
  box-shadow: var(--ch-ai-glow);
}

/* ——— Progress fill ——— */
.ch-progress__fill,
.ga-plan-progress-fill,
.workflow-progress-bar > span,
.ga-progress-ring {
  transition: width 1s var(--ch-ease), background var(--ch-duration) var(--ch-ease);
}
.ch-progress__track,
.ga-plan-progress-track {
  background: var(--ch-color-primary-soft);
  overflow: hidden;
}

/* ——— Inputs: focus + stable height ——— */
.ch-input,
.ch-select,
.ch-textarea,
.form-input,
.form-select,
.ai-assume-location-input,
.ai-assume-input {
  min-height: var(--ch-touch-min);
  transition:
    border-color var(--ch-duration) var(--ch-ease),
    box-shadow var(--ch-duration) var(--ch-ease),
    background var(--ch-duration) var(--ch-ease);
}
.ch-input:focus-visible,
.ch-select:focus-visible,
.ch-textarea:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible,
.ai-assume-location-input:focus-visible,
.ai-assume-input:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--ch-color-primary);
  outline-offset: 2px;
  border-color: var(--ch-color-primary);
  box-shadow: var(--ch-shadow-focus);
  background: var(--ch-color-surface);
}

/* ——— Count-up numbers ——— */
.ch-count,
.ch-metric-value,
.ai-assume-big,
.ga-metric-value,
.ga-plan-score-num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}
.ch-count.is-counting,
.ch-tick.is-ticking {
  color: var(--ch-color-primary);
}

/* ——— Loading / empty (anti layout-shift) ——— */
.ch-loading {
  min-height: 1.5rem;
}
.ch-skeleton {
  min-height: 0.85rem;
}
.ch-state,
.ch-card--empty {
  min-height: 12rem;
  display: grid;
  place-content: center;
  gap: var(--ch-space-3);
}
.ai-assume-shell.is-updating .ai-assume-grid {
  min-height: 18rem;
}
.ai-assume-shell.is-updating .ai-assume-card-value,
.ai-assume-shell.is-updating .ai-assume-big {
  filter: saturate(1.05);
}

/* ——— Assumption / plan surfaces ——— */
.ai-assume-summary-card,
.toolkit-hero-outcome-card,
.ga-plan-dashboard {
  box-shadow: var(--ch-shadow-md);
}
.ai-assume-grid,
.ga-plan-metrics,
.ga-plan-recs {
  gap: var(--ch-space-5);
}
.ai-assume-card,
.ga-plan-metric {
  min-height: 11.5rem;
}

/* ——— Tracker polish ——— */
.ga-tracker-btn {
  transition: background var(--ch-duration) var(--ch-ease), border-color var(--ch-duration) var(--ch-ease);
  min-height: var(--ch-touch-min);
}
.ga-tracker-item.is-complete .ga-tracker-num {
  transition: background var(--ch-duration) var(--ch-ease), color var(--ch-duration) var(--ch-ease);
}

/* ——— Responsive: tablet ——— */
@media (max-width: 900px) {
  .toolkit-hero-premium-grid,
  .ai-assume-context,
  .ai-assume-highlights,
  .ga-plan-metrics.ch-metric-grid,
  .ga-layout {
    grid-template-columns: 1fr;
  }
  .ga-sidebar {
    position: static;
  }
  .ga-main {
    min-height: 18rem;
  }
  .ch-btn-row .btn {
    flex: 1 1 calc(50% - 0.5rem);
  }
}

/* ——— Responsive: mobile ——— */
@media (max-width: 640px) {
  .container {
    width: min(100% - 1.5rem, var(--ch-container));
  }
  .section {
    padding-block: 3rem;
  }
  .ai-assume-grid,
  .ch-grid-2,
  .ch-metric-grid,
  .ga-summary-grid {
    grid-template-columns: 1fr;
  }
  .ch-btn-row .btn,
  .ga-plan-actions .btn,
  .ai-assume-accept-all {
    flex: 1 1 100%;
    max-width: none;
  }
  .ai-assume-card,
  .ga-plan-metric {
    min-height: 0;
  }
  .toolkit-hero-benefits {
    grid-template-columns: 1fr;
  }
  .page-hero {
    padding-top: 2.25rem;
  }
}

/* ——— Reduced motion ——— */
/* ——— Empty / loading polish ——— */
.ch-state--empty,
.ch-card--empty {
  background:
    linear-gradient(180deg, #f8fafc, var(--ch-color-surface));
  box-shadow: var(--ch-shadow-sm);
}
.ch-state--empty .ch-state__title {
  font-size: var(--ch-text-lg);
}
.smart-recs {
  min-height: 6.5rem;
}
.smart-recs [data-smart-recs-list] li {
  transition: opacity var(--ch-duration) var(--ch-ease), transform var(--ch-duration-fast) var(--ch-ease);
}
.smart-recs [data-smart-recs-list] li:hover {
  transform: translateX(2px);
  opacity: 1;
}
.smart-recs [data-smart-recs-empty] {
  margin: 0;
  padding: var(--ch-space-4);
  border: 1px dashed rgba(255, 255, 255, 0.28);
  border-radius: var(--ch-radius-lg);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.82);
  text-align: center;
  line-height: var(--ch-leading-normal);
  min-height: 4rem;
  display: grid;
  place-content: center;
}
.toolkit-empty,
[data-toolkit-empty] {
  min-height: 10rem;
  border-radius: var(--ch-radius-xl);
  border: 1px dashed var(--ch-color-border);
  background: linear-gradient(180deg, #f8fafc, var(--ch-color-surface));
  display: grid;
  place-content: center;
  gap: var(--ch-space-2);
  padding: var(--ch-space-8) var(--ch-space-5);
  text-align: center;
  color: var(--ch-color-text-secondary);
}
.ai-assume-shell.is-updating {
  position: relative;
}
.ai-assume-shell.is-updating::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(
    100deg,
    transparent 30%,
    rgba(239, 246, 255, 0.45) 50%,
    transparent 70%
  );
  background-size: 200% 100%;
  animation: chPolishShimmer 1.1s linear infinite;
}
@keyframes chPolishShimmer {
  to {
    background-position: -200% 0;
  }
}
.ch-skeleton,
.skeleton {
  min-height: 0.85rem;
}

@media (prefers-reduced-motion: reduce) {
  .ch-reveal,
  .ch-reveal.is-visible,
  .ch-reveal.ch-reveal--wait,
  .ga-main.is-step-enter .ga-step-panel,
  .ga-main.is-step-enter .ga-summary,
  .btn,
  .ch-card,
  .ai-assume-card,
  .ch-progress__fill,
  .ga-plan-progress-fill,
  .ai-assume-shell.is-updating::after {
    transition: none !important;
    animation: none !important;
    transform: none !important;
  }
  .ch-reveal,
  .ch-reveal.ch-reveal--wait {
    opacity: 1;
  }
}