/* ============================================
   PlantWise — Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Color palette — Normal mode */
  --color-primary: #2d6a4f;
  --color-primary-light: #40916c;
  --color-primary-dark: #1b4332;
  --color-accent: #52b788;
  --color-accent-glow: rgba(82, 183, 136, 0.2);
  --color-surface: #fefae0;
  --color-surface-alt: #f0ead2;
  --color-card: #ffffff;
  --color-text: #1b4332;
  --color-text-secondary: #4a6b5a;
  --color-text-muted: #7c9a8d;
  --color-border: #d4e7db;
  --color-warning: #e76f51;
  --color-warning-bg: #fdf0ed;
  --color-danger: #d62828;
  --color-success: #2d6a4f;
  --color-shadow: rgba(45, 106, 79, 0.08);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-scale: 1;
  --font-size-xs: calc(0.75rem * var(--font-scale));
  --font-size-sm: calc(0.875rem * var(--font-scale));
  --font-size-base: calc(1.125rem * var(--font-scale));
  --font-size-lg: calc(1.25rem * var(--font-scale));
  --font-size-xl: calc(1.5rem * var(--font-scale));
  --font-size-2xl: calc(1.875rem * var(--font-scale));
  --font-size-3xl: calc(2.25rem * var(--font-scale));

  /* Spacing (8px grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Borders & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --header-height: 60px;
  --bottom-nav-height: 72px;
  --max-width: 480px;
}

/* --- High Contrast Mode --- */
[data-contrast="high"] {
  --color-primary: #00ff88;
  --color-primary-light: #33ffaa;
  --color-primary-dark: #00cc66;
  --color-accent: #00ff88;
  --color-accent-glow: rgba(0, 255, 136, 0.25);
  --color-surface: #000000;
  --color-surface-alt: #111111;
  --color-card: #1a1a1a;
  --color-text: #ffffff;
  --color-text-secondary: #cccccc;
  --color-text-muted: #999999;
  --color-border: #444444;
  --color-warning: #ff6b35;
  --color-warning-bg: #2a1a10;
  --color-danger: #ff4444;
  --color-success: #00ff88;
  --color-shadow: rgba(0, 255, 136, 0.05);
}

/* --- Font Scale --- */
[data-font-scale="small"] {
  --font-scale: 0.85;
}

[data-font-scale="medium"] {
  --font-scale: 1;
}

[data-font-scale="large"] {
  --font-scale: 1.2;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-surface);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

ul {
  list-style: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}

/* ============================================
   App Header
   ============================================ */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-back-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  transition: background var(--transition-fast);
}

.nav-back-btn:hover,
.nav-back-btn:focus-visible {
  background: var(--color-accent-glow);
}

.app-logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-icon {
  font-size: 1.4em;
}

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

.icon-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.icon-btn:hover,
.icon-btn:focus-visible {
  background: var(--color-accent-glow);
  color: var(--color-primary);
}

/* ============================================
   Main Area & Screens
   ============================================ */
#appMain {
  padding-top: var(--header-height);
  padding-bottom: var(--bottom-nav-height);
  min-height: 100vh;
  min-height: 100dvh;
}

.screen {
  display: none;
  animation: fadeIn var(--transition-normal) ease;
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.screen-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-8);
}

.screen-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.screen-hint {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

/* ============================================
   SCREEN 1: Welcome / Home
   ============================================ */
.welcome-screen {
  text-align: center;
}

.welcome-hero {
  padding: var(--space-6) 0 var(--space-8);
}

/* Animated plant graphic */
.hero-illustration {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.hero-plant-graphic {
  position: relative;
  width: 120px;
  height: 120px;
}

.leaf {
  position: absolute;
  width: 40px;
  height: 60px;
  border-radius: 50% 0 50% 0;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
  opacity: 0.85;
}

.leaf-1 {
  top: 10px;
  left: 40px;
  transform: rotate(-15deg);
  animation: leafSway 3s ease-in-out infinite;
}

.leaf-2 {
  top: 30px;
  left: 15px;
  transform: rotate(-45deg);
  animation: leafSway 3s ease-in-out infinite 0.5s;
  width: 35px;
  height: 50px;
}

.leaf-3 {
  top: 25px;
  right: 15px;
  transform: rotate(30deg) scaleX(-1);
  animation: leafSway 3s ease-in-out infinite 1s;
  width: 35px;
  height: 50px;
}

.magnifier {
  position: absolute;
  bottom: 0;
  right: 0;
  color: var(--color-primary);
  background: var(--color-card);
  border-radius: 50%;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px var(--color-shadow);
  animation: floatBounce 2s ease-in-out infinite;
}

@keyframes leafSway {

  0%,
  100% {
    transform: rotate(var(--base-rotate, -15deg));
  }

  50% {
    transform: rotate(calc(var(--base-rotate, -15deg) + 5deg));
  }
}

.leaf-1 {
  --base-rotate: -15deg;
}

.leaf-2 {
  --base-rotate: -45deg;
}

.leaf-3 {
  --base-rotate: 30deg;
}

@keyframes floatBounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-6px);
  }
}

.welcome-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.welcome-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 320px;
  margin: 0 auto;
  line-height: 1.5;
}

/* Action Grid */
.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.action-card {
  background: var(--color-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  transition: all var(--transition-normal);
  min-height: 140px;
}

.action-card:hover,
.action-card:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-shadow);
}

.action-card:active {
  transform: translateY(0);
}

.action-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent-glow), transparent);
  border-radius: var(--radius-md);
  color: var(--color-primary);
}

.action-label {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

.action-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.welcome-footer {
  padding-top: var(--space-4);
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-primary);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  min-height: 48px;
}

.link-btn:hover,
.link-btn:focus-visible {
  background: var(--color-accent-glow);
}

/* ============================================
   SCREEN 2: Capture / Upload
   ============================================ */
.capture-preview {
  background: var(--color-surface-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  overflow: hidden;
  position: relative;
}

.preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  padding: var(--space-6);
}

.preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  max-height: 360px;
}

/* Text input area */
.text-input-area {
  margin-bottom: var(--space-6);
}

.input-label {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.plant-textarea {
  width: 100%;
  padding: var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  font-size: var(--font-size-base);
  line-height: 1.6;
  resize: vertical;
  transition: border-color var(--transition-fast);
  min-height: 120px;
}

.plant-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.plant-textarea::placeholder {
  color: var(--color-text-muted);
}

/* Audio input area */
.audio-input-area {
  margin-bottom: var(--space-6);
  text-align: center;
}

.record-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5);
  border-radius: 50%;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  transition: all var(--transition-normal);
  margin: var(--space-4) 0;
  box-shadow: 0 4px 20px rgba(45, 106, 79, 0.3);
}

.record-btn:hover,
.record-btn:focus-visible {
  transform: scale(1.05);
  box-shadow: 0 6px 28px rgba(45, 106, 79, 0.4);
}

.record-btn.recording {
  background: linear-gradient(135deg, var(--color-warning), #ff8b6a);
  animation: pulseRecord 1.5s ease-in-out infinite;
}

@keyframes pulseRecord {

  0%,
  100% {
    box-shadow: 0 4px 20px rgba(231, 111, 81, 0.3);
  }

  50% {
    box-shadow: 0 4px 32px rgba(231, 111, 81, 0.6);
  }
}

#recordBtnLabel {
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.audio-transcript {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  text-align: left;
}

.transcript-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.transcript-text {
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.5;
}

/* Capture actions */
.capture-actions {
  display: flex;
  gap: var(--space-3);
}

.capture-actions .btn {
  flex: 1;
}

/* ============================================
   SCREEN 3: Processing
   ============================================ */
.processing-screen {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height) - 80px);
  min-height: calc(100dvh - var(--header-height) - var(--bottom-nav-height) - 80px);
}

.processing-animation {
  margin-bottom: var(--space-8);
}

.processing-spinner {
  position: relative;
  width: 100px;
  height: 100px;
  animation: spinSlow 4s linear infinite;
}

.spinner-leaf {
  position: absolute;
  font-size: 2rem;
}

.sl-1 {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  animation: leafPulse 1.5s ease-in-out infinite;
}

.sl-2 {
  bottom: 10px;
  left: 5px;
  animation: leafPulse 1.5s ease-in-out infinite 0.5s;
}

.sl-3 {
  bottom: 10px;
  right: 5px;
  animation: leafPulse 1.5s ease-in-out infinite 1s;
}

@keyframes spinSlow {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes leafPulse {

  0%,
  100% {
    opacity: 0.5;
    transform: scale(1);
  }

  50% {
    opacity: 1;
    transform: scale(1.2);
  }
}

.progress-container {
  width: 100%;
  max-width: 280px;
  height: 8px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: var(--space-6) 0 var(--space-3);
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  border-radius: var(--radius-full);
  transition: width 200ms ease;
}

.progress-percent {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--space-6);
}

/* ============================================
   SCREEN: Error / Not Identified
   ============================================ */
.error-screen {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height) - 80px);
  min-height: calc(100dvh - var(--header-height) - var(--bottom-nav-height) - 80px);
}

.error-illustration {
  margin-bottom: var(--space-6);
}

.error-emoji {
  font-size: 4.5rem;
  display: block;
  animation: headTilt 2s ease-in-out infinite;
}

@keyframes headTilt {

  0%,
  100% {
    transform: rotate(0deg);
  }

  25% {
    transform: rotate(-8deg);
  }

  75% {
    transform: rotate(8deg);
  }
}

.error-message {
  max-width: 340px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

.error-tips {
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-6) 0;
  text-align: left;
  width: 100%;
  max-width: 360px;
}

.error-tips-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.error-tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.error-tips-list li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.4;
  padding-left: var(--space-1);
}

.error-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 280px;
}

/* Benefit source citation */
.benefit-source {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-1);
}

/* ============================================
   SCREEN 4: Results
   ============================================ */

/* A11y Toolbar */
.a11y-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
}

.font-controls {
  display: flex;
  gap: var(--space-2);
}

.a11y-btn {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: var(--color-card);
  transition: all var(--transition-fast);
}

.a11y-btn:hover,
.a11y-btn:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.a11y-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.contrast-btn {
  gap: var(--space-2);
}

/* Result Card */
.result-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 4px 24px var(--color-shadow);
  margin-bottom: var(--space-6);
}

.result-image-wrap {
  position: relative;
  width: 100%;
  height: 220px;
  background: linear-gradient(135deg, var(--color-accent-glow), var(--color-surface-alt));
  overflow: hidden;
}

.result-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.confidence-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-contrast="high"] .confidence-badge {
  background: rgba(0, 0, 0, 0.85);
}

.confidence-value {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-success);
}

.confidence-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-body {
  padding: var(--space-6);
}

.plant-common-name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.plant-scientific-name {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.result-section {
  margin-bottom: var(--space-6);
}

.result-section:last-child {
  margin-bottom: 0;
}

.result-section-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-border);
}

/* Tags */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-accent-glow);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary-dark);
}

.tag-detail {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

/* Benefits */
.benefit-list {
  list-style: none;
}

.benefit-list li {
  position: relative;
  padding: var(--space-3) 0 var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.benefit-list li:last-child {
  border-bottom: none;
}

.benefit-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: var(--space-3);
  color: var(--color-accent);
  font-weight: 700;
}

/* Safety */
.safety-card {
  background: var(--color-warning-bg);
  border: 2px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.safety-list li {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.safety-list li::before {
  content: '⚠';
  position: absolute;
  left: 0;
  top: var(--space-2);
}

/* TTS button */
.btn-tts {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-4);
  background: var(--color-surface-alt);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary);
  transition: all var(--transition-fast);
  border-top: 1px solid var(--color-border);
}

.btn-tts:hover,
.btn-tts:focus-visible {
  background: var(--color-accent-glow);
}

.btn-tts.reading {
  background: var(--color-primary);
  color: white;
}

/* Result actions */
.result-actions {
  display: flex;
  gap: var(--space-3);
}

.result-actions .btn {
  flex: 1;
}

/* ============================================
   SCREEN 5: Saved Plants
   ============================================ */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  transition: border-color var(--transition-fast);
}

.search-bar:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.search-bar svg {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  border: none;
  background: transparent;
  font-size: var(--font-size-base);
  padding: var(--space-1) 0;
  min-height: 44px;
}

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

.search-input::placeholder {
  color: var(--color-text-muted);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.6;
}

.empty-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.empty-hint {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* Saved plant cards */
.saved-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.saved-card:hover,
.saved-card:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px var(--color-shadow);
}

.saved-card-image {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-surface-alt);
}

.saved-card-body {
  flex: 1;
  min-width: 0;
}

.saved-card-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.saved-card-scientific {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--space-2);
}

.saved-card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.saved-card-delete {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  align-self: center;
  transition: all var(--transition-fast);
}

.saved-card-delete:hover {
  background: rgba(214, 40, 40, 0.1);
  color: var(--color-danger);
}

/* ============================================
   SCREEN 6: Settings
   ============================================ */
.settings-group {
  margin-bottom: var(--space-8);
}

.settings-group-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-border);
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-4);
}

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

.setting-label {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
}

.setting-control {
  flex-shrink: 0;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 56px;
  height: 32px;
  flex-shrink: 0;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 24px;
  width: 24px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  border-radius: 50%;
  transition: var(--transition-normal);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

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

.toggle-switch input:checked+.toggle-slider::before {
  transform: translateX(24px);
}

.toggle-switch input:focus-visible+.toggle-slider {
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* Select */
.setting-select {
  padding: var(--space-2) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-card);
  font-size: var(--font-size-base);
  min-height: 44px;
  min-width: 120px;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  appearance: auto;
}

.setting-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* Settings footer */
.settings-footer {
  text-align: center;
  padding: var(--space-6) 0;
  color: var(--color-text-muted);
}

.settings-version {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.settings-disclaimer {
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  min-height: 52px;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  box-shadow: 0 4px 12px rgba(45, 106, 79, 0.25);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(45, 106, 79, 0.35);
}

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

.btn-outline {
  background: var(--color-card);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: var(--color-accent-glow);
}

.btn-ghost {
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-5);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.btn-danger {
  color: var(--color-danger);
}

.btn-danger:hover {
  background: rgba(214, 40, 40, 0.08);
}

/* ============================================
   Bottom Navigation
   ============================================ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  min-width: 64px;
  min-height: 48px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-item:hover,
.nav-item:focus-visible {
  color: var(--color-primary);
}

.nav-item.active {
  color: var(--color-primary);
}

.nav-item.active svg {
  stroke-width: 2.5;
}

/* ============================================
   Toast
   ============================================ */
.toast {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--space-4));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-surface);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  z-index: 200;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  animation: toastIn var(--transition-normal) ease;
  white-space: nowrap;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ============================================
   Focus Styles
   ============================================ */
*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 600px) {
  .screen-content {
    padding: var(--space-8) var(--space-6) var(--space-10);
  }

  .action-grid {
    gap: var(--space-5);
  }

  .result-image-wrap {
    height: 280px;
  }
}

@media (min-width: 768px) {
  :root {
    --max-width: 540px;
  }

  .bottom-nav {
    max-width: 540px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }

  .app-header {
    max-width: 540px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}