/* ==========================================================================
   Depth of Field Calculator — Styles
   Matches the clean, minimal aesthetic of Camera Settings
   ========================================================================== */

/* --------------------------------------------------------------------------
   Fonts & Base
   -------------------------------------------------------------------------- */
.dof-page {
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  
  /* Accent color for DOF elements */
  --color-dof-accent: #7c3aed;
  --color-dof-accent-subtle: rgba(124, 58, 237, 0.08);
  --color-dof-gradient-start: #6d28d9;
  --color-dof-gradient-end: #a78bfa;
  --color-dof-sharp: #22c55e;
  --color-dof-blur: #e5e5e5;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* --------------------------------------------------------------------------
   DOF Calculator Layout
   -------------------------------------------------------------------------- */
.dof-calc-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (max-width: 1024px) {
  .dof-calc-layout {
    grid-template-columns: 1fr;
  }
}

/* Calculator Inputs */
.dof-calc-inputs {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.input-label {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.input-hint {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  font-weight: var(--font-weight-normal);
}

.input-hint.warning {
  color: #b45309;
}

.input-with-unit {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-with-unit:focus-within {
  border-color: var(--color-black);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

.input-with-unit input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: none;
  background: transparent;
  font-size: var(--text-base);
  font-family: var(--font-mono);
  min-width: 0;
}

.input-with-unit input:focus {
  outline: none;
}

.input-unit,
.input-prefix {
  padding: var(--space-3) var(--space-3);
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  border-left: 1px solid var(--color-gray-200);
}

.input-prefix {
  border-left: none;
  border-right: 1px solid var(--color-gray-200);
}

.input-presets {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.input-presets button {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.input-presets button:hover {
  background: var(--color-gray-200);
  color: var(--color-black);
}

.input-presets button.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.dof-calc-inputs select {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.dof-calc-inputs select:focus {
  outline: none;
  border-color: var(--color-black);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

/* Circle of Confusion Display */
.coc-display {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
}

.coc-label {
  color: var(--color-gray-500);
}

.coc-value {
  color: var(--color-black);
  font-weight: var(--font-weight-medium);
}

/* Distance Input with Unit Toggle */
.distance-input-wrapper {
  display: flex;
  gap: var(--space-2);
}

.distance-input-wrapper .input-with-unit {
  flex: 1;
}

.unit-toggle {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.unit-toggle:hover {
  background: var(--color-gray-200);
  color: var(--color-black);
}

/* --------------------------------------------------------------------------
   DOF Calculator Results Panel
   -------------------------------------------------------------------------- */
.dof-calc-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.dof-result-card {
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

.dof-result-card--primary {
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  box-shadow: var(--shadow-lg);
}

.dof-result-card--large {
  padding: var(--space-6);
}

.result-header {
  margin-bottom: var(--space-2);
}

.result-badge {
  display: inline-block;
  padding: 2px var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
}

.result-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-500);
}

.dof-result-card--primary .result-title {
  color: rgba(255, 255, 255, 0.8);
}

.result-value {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.result-value .value-number {
  font-size: var(--text-4xl);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  line-height: 1;
}

.dof-result-card--large .value-number {
  font-size: var(--text-5xl);
}

.result-value .value-unit {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
}

.dof-result-card--primary .value-unit {
  color: rgba(255, 255, 255, 0.7);
}

.result-desc {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.dof-result-card--primary .result-desc {
  color: rgba(255, 255, 255, 0.7);
}

/* Results Grid */
.dof-results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

@media (max-width: 768px) {
  .dof-results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .dof-results-grid {
    grid-template-columns: 1fr;
  }
}

.dof-results-grid .dof-result-card {
  padding: var(--space-4);
}

.dof-results-grid .value-number {
  font-size: var(--text-2xl);
}

/* --------------------------------------------------------------------------
   DOF Visual Diagram - Improved Scene-Based Design
   -------------------------------------------------------------------------- */
.dof-visual {
  margin-top: var(--space-6);
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
}

.dof-visual-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-gray-500);
  margin-bottom: var(--space-5);
  text-align: center;
}

/* Scene Layout */
.dof-diagram-scene {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

/* Camera Icon */
.dof-camera {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding-top: 48px; /* Align with the bar */
}

.dof-camera svg {
  width: 40px;
  height: 40px;
  color: var(--color-gray-600);
}

.dof-camera-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  font-weight: var(--font-weight-medium);
}

/* Scene Container */
.dof-scene {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

/* Zone Labels */
.dof-zone-labels {
  display: flex;
  position: relative;
  height: 28px;
}

.dof-zone-label {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: left var(--transition-base), opacity var(--transition-base);
  white-space: nowrap;
}

.dof-zone-label--blur {
  color: var(--color-gray-500);
  background: var(--color-gray-100);
}

.dof-zone-label--sharp {
  color: var(--color-dof-accent);
  background: rgba(124, 58, 237, 0.1);
}

.dof-zone-label .zone-icon {
  font-size: 10px;
}

/* Scene Bar */
.dof-scene-bar {
  position: relative;
  height: 64px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  overflow: visible;
  border: 1px solid var(--color-gray-200);
}

/* Blur zones */
.dof-zone--blur-near,
.dof-zone--blur-far {
  position: absolute;
  top: 0;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    var(--color-gray-200) 0px,
    var(--color-gray-200) 2px,
    transparent 2px,
    transparent 6px
  );
  opacity: 0.7;
  transition: left var(--transition-base), width var(--transition-base);
}

.dof-zone--blur-near {
  left: 0;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.dof-zone--blur-far {
  right: 0;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* Sharp zone */
.dof-zone--sharp {
  position: absolute;
  top: -1px;
  height: calc(100% + 2px);
  background: linear-gradient(
    135deg, 
    var(--color-dof-gradient-start) 0%, 
    var(--color-dof-gradient-end) 50%,
    var(--color-dof-gradient-start) 100%
  );
  border-radius: var(--radius-lg);
  box-shadow: 
    0 4px 16px rgba(124, 58, 237, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: left var(--transition-base), width var(--transition-base);
  overflow: hidden;
}

/* Edge gradients to show blur transition */
.dof-zone-edge {
  position: absolute;
  top: 0;
  height: 100%;
  width: 20px;
  pointer-events: none;
}

.dof-zone-edge--near {
  left: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.3), transparent);
}

.dof-zone-edge--far {
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(0,0,0,0.1));
}

/* Focus point marker */
.dof-focus-marker {
  position: absolute;
  top: -8px;
  bottom: -8px;
  width: 3px;
  transform: translateX(-50%);
  z-index: 10;
  transition: left var(--transition-base);
}

.focus-marker-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: var(--color-black);
  border-radius: 1px;
}

.focus-marker-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: var(--color-white);
  border: 3px solid var(--color-black);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Scale ruler */
.dof-scale-ruler {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  font-family: var(--font-mono);
}

/* Distance Summary - fixed 3-column layout */
.dof-distance-summary {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
}

.dof-distance-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  text-align: center;
}

.dof-distance-item .distance-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: var(--font-weight-medium);
}

.dof-distance-item .distance-value {
  font-size: var(--text-lg);
  font-family: var(--font-mono);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-700);
}

.dof-distance-item--near {
  align-items: flex-start;
  text-align: left;
}

.dof-distance-item--far {
  align-items: flex-end;
  text-align: right;
}

.dof-distance-item--focus .distance-value {
  font-size: var(--text-xl);
  color: var(--color-black);
}

.dof-distance-item--focus .distance-label {
  color: var(--color-gray-600);
}

/* Legend */
.dof-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-100);
}

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

.dof-legend-color {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-sm);
}

.dof-legend-color--blur {
  background: repeating-linear-gradient(
    90deg,
    var(--color-gray-300) 0px,
    var(--color-gray-300) 2px,
    var(--color-gray-100) 2px,
    var(--color-gray-100) 4px
  );
  border: 1px solid var(--color-gray-300);
}

.dof-legend-color--sharp {
  background: linear-gradient(135deg, var(--color-dof-gradient-start), var(--color-dof-gradient-end));
}

.dof-legend-color--focus {
  width: 12px;
  height: 12px;
  background: var(--color-white);
  border: 3px solid var(--color-black);
  border-radius: 50%;
}

.dof-legend-label {
  color: var(--color-gray-600);
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .dof-diagram-scene {
    flex-direction: column;
    align-items: stretch;
  }
  
  .dof-camera {
    flex-direction: row;
    padding-top: 0;
    justify-content: center;
  }
  
  .dof-camera svg {
    width: 32px;
    height: 32px;
  }
  
  .dof-zone-labels {
    display: none; /* Hide on mobile, rely on legend */
  }
  
  .dof-legend {
    flex-wrap: wrap;
    gap: var(--space-3);
  }
  
  .dof-legend-item {
    font-size: var(--text-xs);
  }
}

/* --------------------------------------------------------------------------
   Focus Stacking Section
   -------------------------------------------------------------------------- */
.stack-intro {
  margin-bottom: var(--space-8);
}

.stack-info {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.stack-info-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
}

.stack-info p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
}

.stack-use-cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

@media (max-width: 640px) {
  .stack-use-cases {
    grid-template-columns: 1fr;
  }
}

.stack-use-cases li {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  padding-left: var(--space-4);
  position: relative;
}

.stack-use-cases li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-dof-accent);
}

.stack-use-cases li strong {
  color: var(--color-black);
}

/* Stack Calculator */
.stack-calculator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (max-width: 900px) {
  .stack-calculator {
    grid-template-columns: 1fr;
  }
}

.stack-inputs {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

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

.stack-result-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
}

.stack-result-card--primary {
  background: var(--color-black);
  color: var(--color-white);
  border: none;
}

.stack-result-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
  color: var(--color-gray-600);
}

.stack-result-icon svg {
  width: 24px;
  height: 24px;
}

.stack-result-card--primary .stack-result-icon {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

.stack-result-info {
  display: flex;
  flex-direction: column;
}

.stack-result-label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-1);
}

.stack-result-card--primary .stack-result-label {
  color: rgba(255, 255, 255, 0.7);
}

.stack-result-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  line-height: 1;
}

.stack-step-unit,
.stack-depth-unit {
  font-size: var(--text-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-gray-500);
  margin-left: var(--space-1);
}

.stack-result-card--primary .stack-step-unit,
.stack-result-card--primary .stack-depth-unit {
  color: rgba(255, 255, 255, 0.7);
}

/* Stack Visual */
.stack-visual {
  grid-column: 1 / -1;
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  margin-top: var(--space-4);
}

.stack-visual-title {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
}

.stack-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.stack-shot {
  position: relative;
  height: 24px;
  background: var(--color-gray-200);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.stack-shot-zone {
  position: absolute;
  top: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-dof-gradient-start), var(--color-dof-gradient-end));
  border-radius: var(--radius-sm);
}

.stack-shot-label {
  position: absolute;
  left: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-white);
  z-index: 1;
}

.stack-legend {
  display: flex;
  gap: var(--space-6);
  font-size: var(--text-sm);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-sm);
}

.legend-color--sharp {
  background: linear-gradient(90deg, var(--color-dof-gradient-start), var(--color-dof-gradient-end));
}

.legend-color--overlap {
  background: var(--color-gray-300);
}

.legend-label {
  color: var(--color-gray-600);
}

/* --------------------------------------------------------------------------
   Hyperfocal Section
   -------------------------------------------------------------------------- */
.hyperfocal-explanation {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

@media (max-width: 900px) {
  .hyperfocal-explanation {
    grid-template-columns: 1fr;
  }
}

.hyperfocal-concept {
  background: var(--color-gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.hyperfocal-concept-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
}

.hyperfocal-concept p {
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

/* Hyperfocal Diagram - New Structure */
.hyperfocal-diagram {
  margin-top: var(--space-6);
}

.hf-visual-new {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.hf-row--camera {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.hf-camera-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  color: var(--color-gray-700);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.hf-camera-icon svg {
  width: 28px;
  height: 28px;
}

.hf-distance-line {
  flex: 1;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  overflow: hidden;
  background: var(--color-gray-200);
}

.hf-blur-zone {
  width: 30%;
  background: var(--color-gray-300);
}

.hf-sharp-zone-new {
  flex: 1;
  background: linear-gradient(90deg, var(--color-dof-gradient-start), var(--color-dof-gradient-end));
  position: relative;
}

.hf-row--markers {
  display: grid;
  grid-template-columns: 48px 1fr 1fr 1fr;
  gap: var(--space-4);
  padding-left: 0;
}

.hf-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  text-align: center;
}

.hf-marker--camera {
  justify-content: flex-start;
}

.hf-marker-line {
  width: 2px;
  height: 12px;
  background: var(--color-gray-300);
  border-radius: 1px;
}

.hf-marker-line--focus {
  background: var(--color-dof-accent);
  height: 16px;
}

.hf-marker-value {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  color: var(--color-black);
}

.hf-marker--hyperfocal .hf-marker-value {
  color: var(--color-dof-accent);
}

.hf-marker-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  line-height: var(--leading-snug);
}

.hf-marker-label small {
  color: var(--color-gray-400);
  font-size: 10px;
}

@media (max-width: 640px) {
  .hf-row--markers {
    grid-template-columns: 40px 1fr 1fr 1fr;
    gap: var(--space-2);
  }
  
  .hf-marker-value {
    font-size: var(--text-base);
  }
  
  .hf-marker-label small {
    display: none;
  }
}

/* Hyperfocal Formula */
.hyperfocal-formula {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.hyperfocal-formula h4 {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
}

.formula-block {
  padding: var(--space-4);
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
  text-align: center;
  margin-bottom: var(--space-4);
}

.formula-block code {
  font-size: var(--text-xl);
  font-family: var(--font-mono);
  font-weight: var(--font-weight-medium);
}

.formula-legend {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.formula-legend strong {
  color: var(--color-black);
  font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   Sensor Sizes Section
   -------------------------------------------------------------------------- */
.sensor-explanation {
  margin-bottom: var(--space-8);
}

.sensor-info {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.sensor-info h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
}

.sensor-info p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
}

.sensor-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sensor-points li {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  padding-left: var(--space-4);
  position: relative;
}

.sensor-points li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-gray-400);
}

/* Equivalence Note */
.equivalence-note {
  margin-top: var(--space-8);
  padding: var(--space-5);
  background: var(--color-dof-accent-subtle);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--radius-lg);
}

.equivalence-note h4 {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
}

.equivalence-note p {
  color: var(--color-gray-700);
  margin-bottom: var(--space-4);
}

.equivalence-grid {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.equiv-item {
  display: flex;
  flex-direction: column;
  padding: var(--space-3) var(--space-4);
  background: var(--color-white);
  border-radius: var(--radius-md);
  min-width: 120px;
}

.equiv-sensor {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-bottom: var(--space-1);
}

.equiv-value {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
}

/* --------------------------------------------------------------------------
   Aperture Guide
   -------------------------------------------------------------------------- */
.aperture-guide {
  margin-top: var(--space-6);
}

.aperture-scale {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

@media (max-width: 900px) {
  .aperture-scale {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .aperture-scale {
    grid-template-columns: 1fr;
  }
}

.aperture-zone {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-align: center;
}

.aperture-zone--soft {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.aperture-zone--sweet {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.aperture-zone--deep {
  background: rgba(234, 179, 8, 0.1);
  border: 1px solid rgba(234, 179, 8, 0.2);
}

.aperture-zone--diffraction {
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
}

.zone-range {
  display: block;
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  font-family: var(--font-mono);
  margin-bottom: var(--space-2);
}

.zone-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.zone-desc {
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
}

/* --------------------------------------------------------------------------
   Night Vision Mode — DOF Calculator Specific
   -------------------------------------------------------------------------- */
body.night-vision.dof-page {
  --color-dof-accent: var(--nv-text);
  --color-dof-accent-subtle: rgba(204, 51, 51, 0.1);
  --color-dof-gradient-start: #330000;
  --color-dof-gradient-end: var(--nv-text);
  --color-dof-sharp: var(--nv-text);
}

/* Inputs */
body.night-vision .input-label {
  color: var(--nv-text);
}

body.night-vision .input-hint {
  color: var(--nv-text-dim);
}

body.night-vision .input-with-unit {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .input-with-unit:focus-within {
  border-color: var(--nv-text);
  box-shadow: 0 0 0 3px rgba(204, 51, 51, 0.2);
}

body.night-vision .input-with-unit input {
  color: var(--nv-text);
}

body.night-vision .input-unit,
body.night-vision .input-prefix {
  background: var(--nv-bg-elevated);
  color: var(--nv-text-muted);
  border-color: var(--nv-border);
}

body.night-vision .input-presets button {
  color: var(--nv-text-muted);
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .input-presets button:hover {
  background: var(--nv-bg-elevated);
  color: var(--nv-text);
}

body.night-vision .input-presets button.active {
  background: var(--nv-text);
  color: var(--nv-bg);
  border-color: var(--nv-text);
}

body.night-vision .dof-calc-inputs select {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
  color: var(--nv-text);
}

body.night-vision .coc-display {
  background: var(--nv-bg-elevated);
}

body.night-vision .coc-label {
  color: var(--nv-text-dim);
}

body.night-vision .coc-value {
  color: var(--nv-text);
}

body.night-vision .unit-toggle {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
  color: var(--nv-text-muted);
}

body.night-vision .unit-toggle:hover {
  background: var(--nv-bg-elevated);
  color: var(--nv-text);
}

/* Result Cards */
body.night-vision .dof-result-card {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .dof-result-card--primary {
  background: linear-gradient(145deg, var(--nv-bg-card), #200000);
  border: 1px solid var(--nv-border);
}

body.night-vision .result-title {
  color: var(--nv-text-dim);
}

body.night-vision .result-value .value-number {
  color: var(--nv-text);
}

body.night-vision .result-value .value-unit,
body.night-vision .result-desc {
  color: var(--nv-text-muted);
}

/* DOF Visual */
body.night-vision .dof-visual {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .dof-visual-title {
  color: var(--nv-text-dim);
}

body.night-vision .dof-camera svg {
  color: var(--nv-text-muted);
}

body.night-vision .dof-camera-label {
  color: var(--nv-text-dim);
}

body.night-vision .dof-zone-label--blur {
  color: var(--nv-text-dim);
  background: var(--nv-bg-elevated);
}

body.night-vision .dof-zone-label--sharp {
  color: var(--nv-text);
  background: rgba(204, 51, 51, 0.15);
}

body.night-vision .dof-scene-bar {
  background: var(--nv-bg-elevated);
  border-color: var(--nv-border);
}

body.night-vision .dof-zone--blur-near,
body.night-vision .dof-zone--blur-far {
  background: repeating-linear-gradient(
    90deg,
    var(--nv-border) 0px,
    var(--nv-border) 2px,
    transparent 2px,
    transparent 6px
  );
}

body.night-vision .dof-zone--sharp {
  background: linear-gradient(135deg, #330000, var(--nv-text));
  box-shadow: 0 4px 16px rgba(204, 51, 51, 0.25);
}

body.night-vision .focus-marker-line {
  background: var(--nv-text);
}

body.night-vision .focus-marker-dot {
  background: var(--nv-bg-card);
  border-color: var(--nv-text);
  box-shadow: 0 2px 8px rgba(204, 51, 51, 0.3);
}

body.night-vision .dof-scale-ruler {
  color: var(--nv-text-dim);
}

body.night-vision .dof-distance-summary {
  border-color: var(--nv-border);
}

body.night-vision .dof-distance-item .distance-label {
  color: var(--nv-text-dim);
}

body.night-vision .dof-distance-item .distance-value {
  color: var(--nv-text-muted);
}

body.night-vision .dof-distance-item--focus .distance-value {
  color: var(--nv-text);
}

body.night-vision .dof-distance-item--focus .distance-label {
  color: var(--nv-text-muted);
}

body.night-vision .dof-legend {
  border-color: var(--nv-border);
}

body.night-vision .dof-legend-color--blur {
  background: repeating-linear-gradient(
    90deg,
    var(--nv-border) 0px,
    var(--nv-border) 2px,
    var(--nv-bg-card) 2px,
    var(--nv-bg-card) 4px
  );
  border-color: var(--nv-border);
}

body.night-vision .dof-legend-color--sharp {
  background: linear-gradient(135deg, #330000, var(--nv-text));
}

body.night-vision .dof-legend-color--focus {
  background: var(--nv-bg-card);
  border-color: var(--nv-text);
}

body.night-vision .dof-legend-label {
  color: var(--nv-text-muted);
}

/* Stack Section */
body.night-vision .stack-info {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .stack-info-title {
  color: var(--nv-text);
}

body.night-vision .stack-info p {
  color: var(--nv-text-muted);
}

body.night-vision .stack-use-cases li {
  color: var(--nv-text-muted);
}

body.night-vision .stack-use-cases li strong {
  color: var(--nv-text);
}

body.night-vision .stack-use-cases li::before {
  color: var(--nv-text);
}

body.night-vision .stack-result-card {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .stack-result-card--primary {
  background: linear-gradient(145deg, var(--nv-bg-card), #200000);
}

body.night-vision .stack-result-icon {
  background: var(--nv-bg-elevated);
  color: var(--nv-text-muted);
}

body.night-vision .stack-result-card--primary .stack-result-icon {
  background: rgba(204, 51, 51, 0.2);
  color: var(--nv-text);
}

body.night-vision .stack-result-label {
  color: var(--nv-text-dim);
}

body.night-vision .stack-result-value {
  color: var(--nv-text);
}

body.night-vision .stack-visual {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .stack-visual-title {
  color: var(--nv-text);
}

body.night-vision .stack-shot {
  background: var(--nv-bg-elevated);
}

body.night-vision .stack-shot-zone {
  background: linear-gradient(90deg, #330000, var(--nv-text));
}

body.night-vision .legend-label {
  color: var(--nv-text-muted);
}

body.night-vision .legend-color--overlap {
  background: var(--nv-border);
}

/* Hyperfocal Section */
body.night-vision .hyperfocal-concept {
  background: var(--nv-bg-card);
}

body.night-vision .hyperfocal-concept-title {
  color: var(--nv-text);
}

body.night-vision .hyperfocal-concept p {
  color: var(--nv-text-muted);
}

body.night-vision .hf-camera-icon {
  background: var(--nv-bg-elevated);
  color: var(--nv-text-muted);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body.night-vision .hf-distance-line {
  background: var(--nv-bg-elevated);
}

body.night-vision .hf-blur-zone {
  background: var(--nv-border);
}

body.night-vision .hf-sharp-zone-new {
  background: linear-gradient(90deg, #330000, var(--nv-text));
}

body.night-vision .hf-marker-line {
  background: var(--nv-border);
}

body.night-vision .hf-marker-line--focus {
  background: var(--nv-text);
}

body.night-vision .hf-marker-value {
  color: var(--nv-text);
}

body.night-vision .hf-marker--hyperfocal .hf-marker-value {
  color: var(--nv-accent);
}

body.night-vision .hf-marker-label {
  color: var(--nv-text-dim);
}

body.night-vision .hf-marker-label small {
  color: var(--nv-text-dim);
}

body.night-vision .hyperfocal-formula {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .hyperfocal-formula h4 {
  color: var(--nv-text);
}

body.night-vision .formula-block {
  background: var(--nv-bg-elevated);
}

body.night-vision .formula-block code {
  color: var(--nv-text);
}

body.night-vision .formula-legend {
  color: var(--nv-text-muted);
}

body.night-vision .formula-legend strong {
  color: var(--nv-text);
}

/* Sensor Section */
body.night-vision .sensor-info {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .sensor-info h3 {
  color: var(--nv-text);
}

body.night-vision .sensor-info p {
  color: var(--nv-text-muted);
}

body.night-vision .sensor-points li {
  color: var(--nv-text-muted);
}

body.night-vision .equivalence-note {
  background: rgba(204, 51, 51, 0.1);
  border-color: rgba(204, 51, 51, 0.2);
}

body.night-vision .equivalence-note h4 {
  color: var(--nv-text);
}

body.night-vision .equivalence-note p {
  color: var(--nv-text-muted);
}

body.night-vision .equiv-item {
  background: var(--nv-bg-card);
}

body.night-vision .equiv-sensor {
  color: var(--nv-text-dim);
}

body.night-vision .equiv-value {
  color: var(--nv-text);
}

/* Aperture Guide */
body.night-vision .aperture-zone--soft {
  background: rgba(100, 34, 34, 0.2);
  border-color: rgba(100, 34, 34, 0.3);
}

body.night-vision .aperture-zone--sweet {
  background: rgba(34, 100, 34, 0.2);
  border-color: rgba(34, 100, 34, 0.3);
}

body.night-vision .aperture-zone--deep {
  background: rgba(100, 80, 34, 0.2);
  border-color: rgba(100, 80, 34, 0.3);
}

body.night-vision .aperture-zone--diffraction {
  background: var(--nv-bg-card);
  border-color: var(--nv-border);
}

body.night-vision .zone-range,
body.night-vision .zone-label {
  color: var(--nv-text);
}

body.night-vision .zone-desc {
  color: var(--nv-text-muted);
}