@import url('/iol/tokens.css');

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-foreground);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-background);
}

/* Root-Cause Guards: Ensure all layout containers can shrink to viewport */
.app-container,
.main-layout,
.sidebar-column,
.results-column,
.card,
.table-container,
.results-cards-container,
.result-card {
  min-width: 0;
}

/* App Container */
.app-container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-xs);
  width: 100%;
}

@media (min-width: 640px) {
  .app-container {
    padding: var(--space-md);
  }
}

@media (min-width: 1024px) {
  .app-container {
    padding: var(--space-xl);
  }
}

/* Sticky App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-top: env(safe-area-inset-top);
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-xs) var(--space-xs) var(--space-2xs) var(--space-xs);
}

@media (min-width: 640px) {
  .header-inner {
    padding: var(--space-sm) var(--space-md);
  }
}

.header-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  min-height: 48px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  min-width: 0;
  flex: 1 1 auto;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-on-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-text {
  min-width: 0;
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-foreground-strong);
  line-height: var(--line-height-tight);
  white-space: nowrap;
}

.brand-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
  display: none;
}

@media (min-width: 768px) {
  .brand-icon {
    width: var(--space-2xl);
    height: var(--space-2xl);
  }
  .brand-icon svg {
    width: var(--space-xl);
    height: var(--space-xl);
  }
  .brand-text h1 {
    font-size: var(--font-size-xl);
  }
  .brand-subtitle {
    display: block;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

/* OD / OS Segmented Control */
.eye-segmented {
  display: inline-flex;
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
}

.btn-eye {
  min-width: 44px;
  min-height: 44px;
  padding: 0 var(--space-sm);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-foreground);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-eye:hover {
  background-color: var(--color-surface);
}

.btn-eye.active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: var(--shadow-sm);
}

.btn-eye:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.header-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.btn-secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  min-height: 44px;
  min-width: 44px;
  padding: var(--space-2xs) var(--space-xs);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-secondary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-secondary-link .btn-label {
  display: none;
}

@media (min-width: 640px) {
  .btn-secondary-link {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
    gap: var(--space-xs);
  }
  .btn-secondary-link .btn-label {
    display: inline;
  }
}

.btn-secondary-link:hover {
  background-color: var(--color-surface-sunken);
  border-color: var(--color-secondary);
}

.btn-secondary-link:active {
  background-color: var(--color-accent-subtle);
}

.btn-secondary-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Disclaimer Banner */
.disclaimer-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  color: var(--color-warning);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-normal);
  margin-top: var(--space-xs);
}

@media (min-width: 640px) {
  .disclaimer-banner {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    gap: var(--space-sm);
  }
}

.disclaimer-banner svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  stroke: var(--color-warning);
  fill: none;
  stroke-width: 2;
  margin-top: 1px;
}

/* Main Layout */
.main-layout {
  display: grid;
  grid-template-columns: 100%;
  gap: var(--space-md);
  width: 100%;
}

@media (min-width: 1024px) {
  .main-layout {
    grid-template-columns: 360px minmax(0, 1fr);
    align-items: start;
    gap: var(--space-xl);
  }
}

.sidebar-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.results-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Card Surface & Native Collapsible Details */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.section-collapsible summary {
  list-style: none;
  min-height: 48px;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  background-color: var(--color-surface);
  transition: background-color 0.15s ease;
}

.section-collapsible summary::-webkit-details-marker {
  display: none;
}

.section-collapsible summary:hover {
  background-color: var(--color-surface-elevated);
}

.section-collapsible summary:active {
  background-color: var(--color-surface-sunken);
}

.summary-title-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  min-width: 0;
}

.card-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-foreground-strong);
}

@media (min-width: 640px) {
  .card-title {
    font-size: var(--font-size-lg);
  }
}

.summary-chevron {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.summary-chevron svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 2;
  transition: transform 0.2s ease;
}

.section-collapsible[open] > summary .summary-chevron svg {
  transform: rotate(180deg);
}

.section-collapsible .section-content {
  padding: 0 var(--space-md) var(--space-md) var(--space-md);
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-md);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground-strong);
  margin-bottom: var(--space-2xs);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.form-input, .form-select {
  width: 100%;
  min-height: 48px;
  padding: var(--space-xs) var(--space-md);
  padding-right: var(--space-2xl);
  font-family: var(--font-family-sans);
  font-size: 16px; /* Prevents iOS safari zoom on focus */
  color: var(--color-foreground-strong);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-select {
  padding-right: var(--space-md);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--focus-ring);
}

.form-input.warning {
  border-color: var(--color-warning);
  background-color: var(--color-warning-bg);
}

.form-input.error {
  border-color: var(--color-destructive);
  background-color: var(--color-destructive-bg);
}

.input-unit {
  position: absolute;
  right: var(--space-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground-subtle);
  pointer-events: none;
}

.input-warning-msg {
  font-size: var(--font-size-xs);
  color: var(--color-warning);
  margin-top: var(--space-2xs);
  display: none;
}

.input-warning-msg.visible {
  display: block;
}

.input-error-msg {
  font-size: var(--font-size-xs);
  color: var(--color-destructive);
  margin-top: var(--space-2xs);
  display: none;
}

.input-error-msg.visible {
  display: block;
}

/* Two Column Form Row */
.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 340px) {
  .form-row-k {
    grid-template-columns: 1fr 1fr;
  }
  .form-row-acd-lt {
    grid-template-columns: 1fr 1fr;
  }
  .form-row-cct-wtw {
    grid-template-columns: 1fr 1fr;
  }
}

/* Full Width Checkbox Row (48px Hit Area) */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: 48px;
  padding: var(--space-xs) var(--space-md);
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: var(--space-xs);
  margin-bottom: var(--space-xs);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.checkbox-row:hover {
  background-color: var(--color-surface-elevated);
  border-color: var(--color-border-strong);
}

.checkbox-row:active {
  background-color: var(--color-accent-subtle);
}

.checkbox-row input[type="checkbox"] {
  width: 22px;
  height: 22px;
  min-width: 22px;
  min-height: 22px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.checkbox-label-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground-strong);
  line-height: var(--line-height-normal);
}

/* Results Section Header */
.results-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  margin-bottom: var(--space-2xs);
}

.results-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-foreground-strong);
}

@media (min-width: 640px) {
  .results-title {
    font-size: var(--font-size-xl);
  }
}

.results-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
}

@media (min-width: 640px) {
  .results-subtitle {
    font-size: var(--font-size-sm);
  }
}

/* Responsive View Switchers */
.desktop-only {
  display: none;
}

.mobile-only {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

@media (min-width: 1024px) {
  .desktop-only {
    display: block;
  }
  .mobile-only {
    display: none;
  }
}

/* Mobile Result Cards */
.results-cards-container {
  width: 100%;
}

.result-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.result-card-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xs);
}

.result-card-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0; /* flex children default to min-width:auto and refuse to shrink — long badge text then
                   widens the whole card past the viewport (measured 416px inside a 375px frame) */
  overflow-wrap: anywhere;
}

.result-formula-name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-foreground-strong);
}

.result-rec-power {
  font-family: var(--font-family-mono);
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  font-variant-numeric: tabular-nums;
  color: var(--color-primary-active);
  line-height: 1;
  text-align: right;
  white-space: nowrap;
}

.result-card-subline {
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2xs);
  margin-top: 2px;
  margin-bottom: var(--space-2xs);
}

.result-card-subline .bullet {
  color: var(--color-foreground-subtle);
}

.result-ladder-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-2xs);
}

.ladder-chip {
  flex: 1 1 calc(20% - var(--space-xs));
  min-width: 54px;
  min-height: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4px 6px;
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-family-mono);
  text-align: center;
  user-select: none;
}

.ladder-chip.best {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-sm);
}

.chip-power {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.chip-rx {
  font-size: 10px;
  color: var(--color-foreground-muted);
}

.ladder-chip.best .chip-rx {
  color: var(--color-on-primary);
}

/* Desktop Table (>= 1024px) */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.calc-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--font-size-sm);
}

.calc-table th {
  background-color: var(--color-surface-sunken);
  color: var(--color-foreground-strong);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--color-border-strong);
  white-space: nowrap;
}

.calc-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.calc-table tbody tr:hover {
  background-color: var(--color-surface-elevated);
}

.calc-table tr:last-child td {
  border-bottom: none;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-xs);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  white-space: nowrap;
  width: fit-content;
}

.badge-api {
  background-color: var(--color-badge-api-bg);
  color: var(--color-badge-api-text);
  border: 1px solid var(--color-success-border);
}

.badge-author, .badge-authorverified {
  background-color: var(--color-badge-api-bg);
  color: var(--color-badge-api-text);
  border: 1px solid var(--color-success-border);
}

.badge-crosschecked, .badge-oracle {
  background-color: var(--color-badge-crosschecked-bg);
  color: var(--color-badge-crosschecked-text);
  border: 1px solid var(--color-border-strong);
}

.badge-selfconsistency, .badge-invariants {
  background-color: var(--color-badge-selfconsistency-bg);
  color: var(--color-badge-selfconsistency-text);
  border: 1px solid var(--color-warning-border);
}

/* Desktop Power Cell Typography */
.power-rec {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-active);
}

.power-exact {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  color: var(--color-foreground-subtle);
}

.rx-val {
  font-family: var(--font-family-mono);
  font-weight: var(--font-weight-medium);
}

.ladder-container {
  display: flex;
  gap: var(--space-2xs);
  align-items: center;
}

.ladder-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4px 6px;
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  min-width: 48px;
  text-align: center;
}

.ladder-step.best {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary-hover);
  font-weight: var(--font-weight-bold);
}

.ladder-step.best .ladder-rx {
  color: var(--color-on-primary);
}

.ladder-p {
  font-weight: var(--font-weight-semibold);
}

.ladder-rx {
  font-size: 10px;
  color: var(--color-foreground-muted);
}

/* Bridge Rows Section */
.bridge-desc {
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
  margin-bottom: var(--space-md);
  line-height: var(--line-height-normal);
}

@media (min-width: 640px) {
  .bridge-desc {
    font-size: var(--font-size-sm);
  }
}

.bridge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .bridge-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.bridge-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-md);
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  gap: var(--space-sm);
}

.bridge-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xs);
}

.bridge-name {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  color: var(--color-foreground-strong);
}

.bridge-author {
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
}

.bridge-card-bottom {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.bridge-input {
  flex: 1;
  min-height: 48px;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-family-mono);
  font-size: 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-foreground-strong);
}

.bridge-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--focus-ring);
}

.bridge-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  min-height: 48px;
  min-width: 48px;
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-secondary);
  background-color: var(--color-secondary);
  border: none;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease;
}

.bridge-btn:hover {
  background-color: var(--color-secondary-hover);
}

.bridge-btn:active {
  background-color: var(--color-primary-active);
}

.bridge-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Methodology Section & Modal Styling */
.methodology-content {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-foreground-strong);
}

.methodology-heading {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  margin-top: var(--space-md);
  margin-bottom: var(--space-2xs);
  color: var(--color-primary);
}

.methodology-list {
  padding-left: var(--space-md);
  margin-bottom: var(--space-md);
}

.methodology-list li {
  margin-bottom: var(--space-2xs);
}

.mono-code {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  background-color: var(--color-surface-sunken);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
}

/* Modal Dialog / Bottom Sheet on Mobile */
.dialog-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--color-backdrop);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.dialog-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.dialog-content {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top-left-radius: var(--radius-xl);
  border-top-right-radius: var(--radius-xl);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  width: 100%;
  max-width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom));
  box-shadow: var(--shadow-lg);
}

@media (min-width: 641px) {
  .dialog-backdrop {
    align-items: center;
    padding: var(--space-md);
  }
  .dialog-content {
    max-width: 640px;
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
  }
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.dialog-header h3 {
  font-size: var(--font-size-lg);
  color: var(--color-foreground-strong);
}

@media (min-width: 640px) {
  .dialog-header h3 {
    font-size: var(--font-size-xl);
  }
}

.btn-close {
  min-width: 48px;
  min-height: 48px;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-foreground-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-close:hover {
  background-color: var(--color-surface-sunken);
  color: var(--color-foreground-strong);
}

.btn-close:active {
  background-color: var(--color-accent-subtle);
}

/* App Footer */
.app-footer {
  margin-top: auto;
  padding: var(--space-lg) var(--space-md);
  padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
}

@media (min-width: 640px) {
  .app-footer {
    padding: var(--space-xl) var(--space-md);
    font-size: var(--font-size-sm);
  }
}

.app-footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

/* Post-Refractive Mode & Calculate Action */
.post-refractive-fields {
  margin-top: var(--space-xs);
  margin-bottom: var(--space-xs);
  padding: var(--space-sm);
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
}

.field-hint {
  font-size: var(--font-size-xs);
  color: var(--color-foreground-muted);
  margin-top: var(--space-2xs);
  line-height: var(--line-height-tight);
}

.form-actions {
  margin-top: var(--space-md);
  display: flex;
  justify-content: flex-end;
}

.btn-calculate {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  min-height: 48px;
  padding: 0 var(--space-xl);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
}

.btn-calculate:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

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

.btn-calculate:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

@media (max-width: 639px) {
  .form-actions {
    width: 100%;
  }
  .btn-calculate {
    width: 100%;
  }
}

.post-refractive-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  color: var(--color-warning-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.post-refractive-banner .banner-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  stroke: var(--color-warning-text);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-top: 2px;
}

/* Dimmed Standard Rows in Post-Refractive Mode */
.row-dimmed {
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.row-dimmed:hover {
  opacity: 0.85;
}

.result-card.card-dimmed {
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.result-card.card-dimmed:hover {
  opacity: 0.85;
}

.badge-postrefractive-warning {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 10px;
  font-weight: var(--font-weight-medium);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
  border: 1px solid var(--color-warning-border);
  margin-top: 3px;
  white-space: nowrap;
}

/* In-App Official Calculator Embeds */
.embed-disclosure {
  margin-top: var(--space-xs);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-sunken);
  overflow: hidden;
}

.embed-summary {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  cursor: pointer;
  user-select: none;
  background-color: var(--color-surface-elevated);
}

.embed-summary:hover {
  background-color: var(--color-surface);
}

.embed-summary svg {
  flex-shrink: 0;
}

.embed-container {
  padding: var(--space-xs);
  background-color: var(--color-surface-sunken);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.embed-notice {
  font-size: 11px;
  color: var(--color-foreground-subtle);
  font-style: italic;
  padding: 0 var(--space-xs);
}

.embed-frame {
  width: 100%;
  height: 520px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background-color: #fff;
}

/* Accessibility & Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Kane Mode Selector & Toric Controls */
.kane-segmented {
  display: inline-flex;
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
  max-width: 100%;
}

.btn-kane-mode {
  min-height: 32px;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease;
}

@media (max-width: 640px) {
  .btn-kane-mode {
    min-height: 44px;
    padding: 4px 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

.btn-kane-mode:hover {
  background-color: var(--color-surface-elevated);
  color: var(--color-foreground-strong);
}

.btn-kane-mode.active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: var(--shadow-sm);
}

.kane-kc-banner {
  font-size: 11px;
  line-height: 1.3;
  color: var(--color-warning-text);
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  margin-top: 6px;
}

.kane-toric-form {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 6px;
  padding: 6px;
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.kane-toric-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.kane-toric-field label {
  font-size: 10px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground-subtle);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.kane-input {
  width: 100%;
  min-height: 32px;
  padding: 2px 6px;
  font-family: var(--font-family-mono);
  font-size: 12px;
  color: var(--color-foreground-strong);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
}

.kane-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: var(--focus-ring);
}