/* ============================================
   Responsive Design - All Screen Sizes
   ============================================ */

/* ============================================
   CSS Custom Properties for Responsive Design
   ============================================ */
:root {
  /* Fluid spacing scale */
  --space-responsive-xs: clamp(0.125rem, 0.5vw, 0.25rem);
  --space-responsive-sm: clamp(0.25rem, 1vw, 0.5rem);
  --space-responsive-md: clamp(0.5rem, 2vw, 1rem);
  --space-responsive-lg: clamp(0.75rem, 3vw, 1.5rem);
  --space-responsive-xl: clamp(1rem, 4vw, 2rem);
  
  /* Fluid typography scale */
  --font-size-fluid-xs: clamp(0.65rem, 0.6rem + 0.25vw, 0.75rem);
  --font-size-fluid-sm: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-fluid-base: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-fluid-lg: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --font-size-fluid-xl: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-fluid-2xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --font-size-fluid-3xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --font-size-fluid-4xl: clamp(1.75rem, 1.5rem + 1.5vw, 2.5rem);
  
  /* Container widths */
  --container-xs: 320px;
  --container-sm: 420px;
  --container-md: 600px;
  --container-lg: 700px;
  --container-xl: 800px;
}

/* ============================================
   Global Responsive Foundations
   ============================================ */

/* Prevent horizontal overflow globally */
html, body, #app {
  max-width: 100vw;
  overflow-x: hidden;
}

/* Responsive images and media */
img, video, iframe, embed, object {
  max-width: 100%;
  height: auto;
}

/* Responsive tables */
table {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  display: block;
}

/* Word breaking for long text */
h1, h2, h3, h4, h5, h6, p, li, td, th, label, span, a {
  overflow-wrap: break-word;
  word-wrap: break-word;
  hyphens: auto;
}

/* ============================================
   Breakpoints:
   - Mobile: 320px - 480px (small phones)
   - Large Mobile: 481px - 640px (large phones)
   - Small Tablet: 641px - 768px (portrait tablets)
   - Tablet: 769px - 1024px (landscape tablets)
   - Desktop: 1025px - 1280px
   - Large Desktop: 1281px+
   ============================================ */

/* ============================================
   Extra Small Mobile (320px - 360px)
   ============================================ */
@media (max-width: 360px) {
  :root {
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --font-size-xl: 1rem;
    --font-size-lg: 0.9375rem;
    --space-xl: 1.25rem;
    --space-2xl: 1.75rem;
    --space-3xl: 2rem;
  }

  #app {
    max-width: 100%;
    border-radius: 0;
    box-shadow: none;
  }

  body {
    padding: 0;
  }

  #app-header {
    padding: var(--space-xs) var(--space-sm);
    min-height: 52px;
  }

  .header-title {
    font-size: var(--font-size-base);
  }

  .header-btn {
    width: 36px;
    height: 36px;
  }

  #main-content {
    padding: var(--space-sm);
    padding-bottom: calc(var(--space-md) + 70px);
  }

  /* Buttons */
  .btn {
    padding: 10px 16px;
    font-size: var(--font-size-sm);
    min-height: 40px;
  }

  .btn-lg {
    padding: 12px 20px;
    font-size: var(--font-size-base);
  }

  /* Cards */
  .card {
    padding: var(--space-sm);
    border-radius: var(--radius-lg);
  }

  /* Forms */
  .form-input,
  .form-select {
    padding: 10px 12px;
    font-size: var(--font-size-sm);
  }

  /* Welcome Screen */
  .welcome-screen {
    padding: var(--space-md);
    padding-top: var(--space-lg);
  }

  .logo-circle {
    width: 64px;
    height: 64px;
  }

  .brand-title {
    font-size: var(--font-size-2xl);
  }

  .feature-item {
    padding: var(--space-xs) var(--space-sm);
    gap: var(--space-sm);
  }

  .feature-icon {
    width: 36px;
    height: 36px;
  }

  /* Bottom Navigation */
  #bottom-nav {
    padding: var(--space-xs) 0;
  }

  .nav-item {
    padding: var(--space-xs);
    font-size: 10px;
    min-height: 44px;
  }

  .nav-item svg {
    width: 18px;
    height: 18px;
  }

  /* Multi-select */
  .multi-select-option {
    padding: 6px 10px;
    font-size: 11px;
    gap: 4px;
  }

  /* OTP Inputs */
  .otp-inputs {
    gap: var(--space-xs);
  }

  .otp-input {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }

  /* Profile Grid */
  .profile-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .profile-card {
    padding: var(--space-sm);
  }

  /* S3 Configure - Difficulty/Format Pills */
  .s3-configure .difficulty-options,
  .s3-configure .format-options {
    gap: 6px;
    flex-wrap: wrap;
  }

  .s3-configure .difficulty-pill,
  .s3-configure .format-pill {
    padding: 10px 6px;
    gap: 4px;
    min-width: 0;
    flex: 1 1 calc(33.33% - 4px);
  }

  .s3-configure .format-pill .pill-description {
    font-size: 8px;
    display: none;
  }

  /* History items */
  .history-item {
    padding: var(--space-sm);
    gap: var(--space-sm);
  }

  .history-item-icon {
    width: 32px;
    height: 32px;
  }

  .history-item-score {
    font-size: var(--font-size-sm);
    padding: var(--space-xs);
  }

  /* Modal */
  .modal-content {
    width: 95%;
    max-width: 95%;
    padding: var(--space-md);
    margin: var(--space-sm);
  }

  /* Stats grid */
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xs);
  }

  .stat-card {
    padding: var(--space-xs);
  }

  .stat-icon {
    width: 32px;
    height: 32px;
  }

  .stat-value {
    font-size: var(--font-size-base);
  }

  .stat-label {
    font-size: 9px;
  }
}

/* ============================================
   Mobile (320px - 480px)
   ============================================ */
@media (max-width: 480px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.375rem;
    --font-size-xl: 1.125rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
  }

  /* App Container */
  #app {
    max-width: 100%;
    border-radius: 0;
    box-shadow: none;
  }

  body {
    padding: 0;
  }

  /* Header */
  #app-header {
    padding: var(--space-sm) var(--space-md);
    min-height: 56px;
  }

  .header-title {
    font-size: var(--font-size-lg);
  }

  .header-btn {
    width: 40px;
    height: 40px;
    min-width: 44px;
    min-height: 44px;
  }

  /* Main Content */
  #main-content {
    padding: var(--space-md);
    padding-bottom: calc(var(--space-md) + 80px);
  }

  /* Buttons */
  .btn {
    padding: 12px 20px;
    font-size: var(--font-size-sm);
    min-height: 44px;
  }

  .btn-lg {
    padding: 14px 24px;
    font-size: var(--font-size-base);
  }

  .btn-block {
    width: 100%;
    justify-content: center;
  }

  /* Cards */
  .card {
    padding: var(--space-md);
    margin-bottom: var(--space-md);
  }

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

  .form-input,
  .form-select {
    padding: 12px 16px;
    font-size: var(--font-size-base);
    min-height: 48px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  /* Welcome Screen */
  .welcome-screen {
    padding: var(--space-lg);
    padding-top: var(--space-2xl);
  }

  .logo-circle {
    width: 80px;
    height: 80px;
  }

  .brand-title {
    font-size: var(--font-size-3xl);
  }

  .welcome-features {
    margin-bottom: var(--space-xl);
  }

  .feature-item {
    padding: var(--space-sm) var(--space-md);
  }

  /* Bottom Navigation */
  #bottom-nav {
    padding: var(--space-xs) var(--space-sm);
  }

  .nav-item {
    padding: var(--space-xs);
    font-size: var(--font-size-xs);
    min-height: 48px;
    min-width: 48px;
  }

  .nav-item svg {
    width: 20px;
    height: 20px;
  }

  /* Multi-select */
  .multi-select-container {
    gap: var(--space-xs);
  }

  .multi-select-option {
    padding: 8px 12px;
    font-size: var(--font-size-xs);
  }

  /* Difficulty and Format Pills */
  .s3-configure .difficulty-options,
  .s3-configure .format-options {
    gap: 8px;
  }

  .s3-configure .difficulty-pill,
  .s3-configure .format-pill {
    padding: 12px 8px;
    gap: 6px;
    min-height: 60px;
  }

  .s3-configure .format-pill .pill-description {
    font-size: 9px;
  }

  /* Stepper */
  .stepper {
    gap: var(--space-sm);
  }

  .stepper-btn {
    width: 40px;
    height: 40px;
    min-width: 44px;
    min-height: 44px;
  }

  /* OTP Inputs */
  .otp-inputs {
    gap: var(--space-sm);
  }

  .otp-input {
    width: 44px;
    height: 44px;
    font-size: var(--font-size-lg);
  }

  /* Screen Headers */
  .screen-header h1 {
    font-size: var(--font-size-2xl);
  }

  .screen-header .subtitle {
    font-size: var(--font-size-sm);
  }

  /* Auth Screens */
  .auth-screen {
    padding: var(--space-lg);
  }

  .auth-header h1 {
    font-size: var(--font-size-2xl);
  }

  /* Question Renderer */
  .question-card {
    padding: var(--space-md);
  }

  .question-number {
    font-size: var(--font-size-sm);
    width: 28px;
    height: 28px;
  }

  .question-text {
    font-size: var(--font-size-base);
  }

  /* Progress Bar */
  .progress-bar {
    height: 6px;
  }

  /* Modal */
  .modal-overlay {
    padding: var(--space-sm);
  }

  .modal-content {
    width: 95%;
    max-width: 95%;
    padding: var(--space-lg);
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  }

  /* Dropdown Menu */
  .dropdown-menu {
    width: calc(100% - 32px);
    max-width: 280px;
    right: var(--space-md);
  }

  /* Settings */
  .settings-section {
    margin-bottom: var(--space-lg);
  }

  .setting-item {
    padding: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .setting-info {
    flex: 1 1 100%;
  }

  /* History Items */
  .history-item {
    padding: var(--space-md);
  }

  /* Profile Cards */
  .profile-card {
    padding: var(--space-md);
  }

  .profile-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .profile-avatar {
    width: 56px;
    height: 56px;
    font-size: var(--font-size-lg);
  }

  /* Question Options */
  .question-options {
    gap: var(--space-sm);
  }

  .option-btn,
  .mcq-option {
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    min-height: 48px;
  }

  /* Progress Indicators */
  .progress-info {
    font-size: var(--font-size-sm);
  }

  /* Action Cards */
  .s0-entry .action-card {
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .s0-entry .action-card .card-icon {
    width: 44px;
    height: 44px;
  }

  .s0-entry .action-card .card-title {
    font-size: 14px;
  }

  .s0-entry .action-card .card-subtitle {
    font-size: 11px;
  }

  /* Type cards (S2) */
  .s2-assessment-type .type-card {
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .s2-assessment-type .type-icon {
    width: 44px;
    height: 44px;
  }

  .s2-assessment-type .type-title {
    font-size: var(--font-size-base);
  }

  .s2-assessment-type .type-description {
    font-size: 12px;
  }

  /* Subject chips */
  .subject-chips {
    gap: 6px;
  }

  .subject-chip {
    padding: 6px 12px;
    font-size: 12px;
  }

  /* Upload section */
  .s6-upload .upload-options.horizontal {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .s6-upload .upload-option-btn {
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    padding: 16px 12px;
    min-height: 100px;
  }
  
  .s6-upload .upload-option-btn .option-icon {
    width: 48px;
    height: 48px;
  }
  
  .s6-upload .upload-option-btn .option-label {
    font-size: 12px;
  }

  /* Score display */
  .score-ring-container {
    width: 120px;
    height: 120px;
  }

  .score-inner {
    width: 85px;
    height: 85px;
  }

  .score-value {
    font-size: var(--font-size-2xl);
  }

  /* Voice input */
  .voice-input-container {
    bottom: 80px;
    right: var(--space-md);
  }

  .voice-input-btn {
    padding: 8px 14px 8px 10px;
  }

  .voice-btn-inner {
    width: 32px;
    height: 32px;
  }

  .voice-btn-label {
    font-size: 12px;
  }
}

/* ============================================
   Large Mobile / Small Tablet (481px - 768px)
   ============================================ */
@media (min-width: 481px) and (max-width: 768px) {
  #app {
    max-width: 100%;
    border-radius: 0;
  }

  body {
    padding: var(--space-md);
  }

  #main-content {
    padding: var(--space-lg);
    padding-bottom: calc(var(--space-lg) + 80px);
  }

  .welcome-screen {
    padding: var(--space-xl);
  }

  .form-row {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

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

  .modal-content {
    width: 85%;
    max-width: 500px;
  }

  /* Better grid layouts */
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  /* Profile Grid */
  .profile-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  /* Improved spacing */
  .welcome-actions {
    gap: var(--space-md);
  }

  /* Action cards */
  .s0-entry .action-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  /* Type cards side by side */
  .s2-assessment-type .type-cards {
    gap: var(--space-md);
  }

  /* Upload options */
  .s6-upload .upload-options.horizontal {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Stats grid */
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* History items */
  .history-item {
    padding: var(--space-lg);
  }
}

/* ============================================
   Tablet (769px - 1024px)
   ============================================ */
@media (min-width: 769px) and (max-width: 1024px) {
  #app {
    max-width: 600px;
    border-radius: 24px;
    margin: 0 auto;
  }

  body {
    padding: var(--space-lg);
    align-items: center;
    justify-content: center;
  }

  #main-content {
    padding: var(--space-xl);
    padding-bottom: calc(var(--space-xl) + 80px);
  }

  .welcome-screen {
    padding: var(--space-2xl);
  }

  .welcome-features {
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .form-row {
    grid-template-columns: 1fr 1fr;
  }

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

  .modal-content {
    width: 70%;
    max-width: 600px;
    border-radius: var(--radius-2xl);
  }

  /* Better layouts for tablet */
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }

  /* Improved card layouts */
  .card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  /* Multi-select - better spacing */
  .multi-select-container {
    gap: var(--space-md);
  }

  .multi-select-option {
    padding: 12px 18px;
  }

  /* Profile Grid */
  .profile-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 400px;
    margin: 0 auto var(--space-lg);
  }

  /* Action cards */
  .s0-entry .action-cards {
    max-width: 500px;
    margin: 0 auto;
  }

  /* Header adjustments */
  #app-header {
    padding: var(--space-md) var(--space-xl);
  }

  /* Bottom nav */
  #bottom-nav {
    padding: var(--space-sm) var(--space-lg);
  }

  .nav-item {
    padding: var(--space-sm) var(--space-lg);
  }
}

/* ============================================
   Desktop (1025px+)
   ============================================ */
@media (min-width: 1025px) {
  #app {
    max-width: 700px;
    border-radius: 24px;
    margin: 0 auto;
  }

  body {
    padding: var(--space-xl);
    align-items: center;
    justify-content: center;
  }

  #main-content {
    padding: var(--space-2xl);
    padding-bottom: calc(var(--space-2xl) + 80px);
    max-width: 100%;
  }

  .welcome-screen {
    padding: var(--space-3xl);
    max-width: 600px;
    margin: 0 auto;
  }

  .welcome-features {
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
  }

  .form-row {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }

  .card {
    padding: var(--space-2xl);
  }

  .modal-content {
    width: 60%;
    max-width: 700px;
    border-radius: var(--radius-2xl);
  }

  /* Better hover states for desktop */
  .btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
  }

  .card-clickable:hover {
    box-shadow: var(--shadow-card-hover);
  }

  /* Larger touch targets for desktop */
  .btn {
    min-height: 48px;
  }

  .nav-item {
    padding: var(--space-sm) var(--space-md);
  }

  /* Better spacing for desktop */
  .multi-select-container {
    gap: var(--space-md);
  }

  .multi-select-option {
    padding: 14px 20px;
  }

  /* Desktop grid layouts */
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
  }

  /* Better desktop card layouts */
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Improved desktop spacing */
  .screen-header {
    margin-bottom: var(--space-2xl);
  }

  /* Profile Grid */
  .profile-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 500px;
    margin: 0 auto var(--space-xl);
  }

  /* Action cards */
  .s0-entry .action-cards {
    max-width: 550px;
    margin: 0 auto;
  }

  /* Type cards */
  .s2-assessment-type .type-cards {
    max-width: 600px;
    margin: 0 auto;
  }

  /* Settings */
  .settings-card {
    max-width: 600px;
    margin: 0 auto;
  }
}

/* ============================================
   Large Desktop (1440px+)
   ============================================ */
@media (min-width: 1440px) {
  #app {
    max-width: 800px;
  }

  #main-content {
    padding: var(--space-3xl);
    padding-bottom: calc(var(--space-3xl) + 80px);
  }

  .welcome-screen {
    max-width: 700px;
  }

  .card {
    padding: var(--space-2xl);
  }
}

/* ============================================
   Extra Large Desktop (1920px+)
   ============================================ */
@media (min-width: 1920px) {
  #app {
    max-width: 900px;
  }

  body {
    padding: var(--space-3xl);
  }

  :root {
    --font-size-base: 1.0625rem;
    --font-size-lg: 1.1875rem;
    --font-size-xl: 1.375rem;
  }
}

/* ============================================
   Landscape Orientation (Mobile/Tablet)
   ============================================ */
@media (max-height: 600px) and (orientation: landscape) {
  .welcome-screen {
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
  }

  .welcome-hero {
    margin-bottom: var(--space-md);
    flex: 1 1 50%;
  }

  .welcome-features {
    flex: 1 1 50%;
    margin-bottom: var(--space-md);
  }

  .welcome-actions {
    flex: 1 1 100%;
  }

  .logo-circle {
    width: 64px;
    height: 64px;
  }

  .welcome-features {
    margin-bottom: var(--space-lg);
  }

  .feature-item {
    padding: var(--space-xs) var(--space-sm);
  }

  .auth-screen {
    padding: var(--space-md);
    flex-direction: row;
    flex-wrap: wrap;
  }

  .auth-header {
    margin-bottom: var(--space-md);
    flex: 1 1 100%;
  }

  .auth-form {
    flex: 1 1 50%;
    padding-right: var(--space-md);
  }

  /* Bottom nav in landscape */
  #bottom-nav {
    padding: var(--space-xs) 0;
  }

  .nav-item {
    flex-direction: row;
    gap: var(--space-xs);
  }

  /* Profile Grid in landscape */
  .profile-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Question card in landscape */
  .question-card {
    display: flex;
    flex-wrap: wrap;
  }

  .question-text {
    flex: 1 1 50%;
  }

  .answer-area {
    flex: 1 1 50%;
  }
}

/* ============================================
   Landscape for tablets
   ============================================ */
@media (min-width: 769px) and (max-height: 600px) and (orientation: landscape) {
  #app {
    max-width: 100%;
    border-radius: 0;
    height: 100vh;
    height: 100dvh;
  }

  body {
    padding: 0;
  }

  #main-content {
    padding: var(--space-md) var(--space-xl);
  }
}

/* ============================================
   Touch Device Optimizations
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  /* Larger touch targets - minimum 44px x 44px (iOS guidelines) */
  .btn {
    min-height: 44px;
    min-width: 44px;
  }

  .header-btn {
    min-width: 44px;
    min-height: 44px;
  }

  .nav-item {
    min-height: 48px;
    padding: var(--space-sm);
  }

  .otp-input {
    min-width: 48px;
    min-height: 48px;
  }

  .form-input,
  .form-select {
    min-height: 48px;
  }

  .mcq-option,
  .option-btn {
    min-height: 48px;
  }

  .multi-select-option {
    min-height: 44px;
  }

  .menu-item {
    min-height: 48px;
  }

  /* Remove hover effects on touch devices */
  .btn:hover {
    transform: none;
  }

  .card-clickable:hover {
    transform: none;
    box-shadow: var(--shadow-card);
  }

  /* Active states instead of hover */
  .btn:active {
    transform: scale(0.98);
    opacity: 0.9;
  }

  .card-clickable:active {
    transform: scale(0.99);
    box-shadow: var(--shadow-card-hover);
  }

  /* Better scrolling */
  #main-content {
    -webkit-overflow-scrolling: touch;
  }

  /* Disable text selection on interactive elements */
  .btn, .nav-item, .menu-item, .card-clickable {
    -webkit-user-select: none;
    user-select: none;
  }
}

/* ============================================
   High DPI / Retina Displays
   ============================================ */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .logo-circle {
    box-shadow: 0 8px 32px rgba(245, 182, 66, 0.4);
  }

  .card {
    border: 0.5px solid var(--color-border);
  }

  /* Sharper borders */
  .form-input,
  .form-select,
  .btn-secondary {
    border-width: 1.5px;
  }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  #app-header,
  #bottom-nav,
  .btn,
  .header-btn,
  .voice-input-container {
    display: none !important;
  }

  #app {
    max-width: 100%;
    box-shadow: none;
    border-radius: 0;
  }

  #main-content {
    padding: 0;
    padding-bottom: 0;
  }

  .card {
    page-break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .question-card {
    page-break-inside: avoid;
  }

  body {
    background: white;
    padding: 0;
  }
}

/* ============================================
   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;
  }

  .btn:hover,
  .card:hover {
    transform: none !important;
  }
}

/* ============================================
   High Contrast Mode
   ============================================ */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000;
    --color-text-secondary: #333;
    --color-text-muted: #555;
  }

  .btn {
    border: 2px solid currentColor;
  }

  .card {
    border: 2px solid var(--color-border);
  }

  .form-input,
  .form-select {
    border: 2px solid var(--color-border);
  }
}

/* ============================================
   Dark Mode Support (Future)
   ============================================ */
@media (prefers-color-scheme: dark) {
  /* Dark mode styles can be added here */
  /* Currently using light theme by default */
}

/* ============================================
   Responsive Utility Classes
   ============================================ */

/* Hide on mobile */
.hide-mobile {
  display: none;
}

@media (min-width: 769px) {
  .hide-mobile {
    display: block;
  }
}

/* Hide on desktop */
.hide-desktop {
  display: block;
}

@media (min-width: 769px) {
  .hide-desktop {
    display: none;
  }
}

/* Show only on mobile */
.show-mobile-only {
  display: block;
}

@media (min-width: 481px) {
  .show-mobile-only {
    display: none;
  }
}

/* Show only on tablet and up */
.show-tablet-up {
  display: none;
}

@media (min-width: 769px) {
  .show-tablet-up {
    display: block;
  }
}

/* Responsive text alignment */
@media (max-width: 480px) {
  .text-center-mobile {
    text-align: center;
  }

  .text-left-mobile {
    text-align: left;
  }
}

/* Responsive spacing */
.spacing-responsive {
  padding: var(--space-md);
}

@media (min-width: 769px) {
  .spacing-responsive {
    padding: var(--space-xl);
  }
}

/* Responsive grid */
.grid-responsive {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 481px) {
  .grid-responsive {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1025px) {
  .grid-responsive {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
}

/* Flex responsive */
.flex-responsive {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

@media (min-width: 769px) {
  .flex-responsive {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

/* Container max-widths */
.container-sm {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 481px) {
  .container-sm {
    max-width: 420px;
  }
}

@media (min-width: 769px) {
  .container-sm {
    max-width: 600px;
  }
}

@media (min-width: 1025px) {
  .container-sm {
    max-width: 700px;
  }
}

.container-md {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 481px) {
  .container-md {
    max-width: 540px;
  }
}

@media (min-width: 769px) {
  .container-md {
    max-width: 720px;
  }
}

@media (min-width: 1025px) {
  .container-md {
    max-width: 900px;
  }
}

/* Flexible images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
  .table-responsive table {
    min-width: 600px;
  }
}

/* Stack on mobile */
.stack-mobile {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

@media (min-width: 481px) {
  .stack-mobile {
    flex-direction: row;
    align-items: center;
  }
}

/* Full width on mobile */
.full-width-mobile {
  width: 100%;
}

@media (min-width: 481px) {
  .full-width-mobile {
    width: auto;
  }
}

/* Responsive padding */
.p-responsive {
  padding: var(--space-sm);
}

@media (min-width: 481px) {
  .p-responsive {
    padding: var(--space-md);
  }
}

@media (min-width: 769px) {
  .p-responsive {
    padding: var(--space-lg);
  }
}

@media (min-width: 1025px) {
  .p-responsive {
    padding: var(--space-xl);
  }
}

/* Responsive margin */
.m-responsive {
  margin: var(--space-sm);
}

@media (min-width: 481px) {
  .m-responsive {
    margin: var(--space-md);
  }
}

@media (min-width: 769px) {
  .m-responsive {
    margin: var(--space-lg);
  }
}

/* Responsive gap */
.gap-responsive {
  gap: var(--space-sm);
}

@media (min-width: 481px) {
  .gap-responsive {
    gap: var(--space-md);
  }
}

@media (min-width: 769px) {
  .gap-responsive {
    gap: var(--space-lg);
  }
}

/* Truncate text */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Line clamp for multi-line truncation */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Safe area insets for notched devices */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  #bottom-nav {
    padding-bottom: calc(var(--space-sm) + env(safe-area-inset-bottom));
  }

  .modal-content {
    padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
  }

  .action-bar {
    padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom));
  }
}

@supports (padding-top: env(safe-area-inset-top)) {
  #app-header {
    padding-top: calc(var(--space-md) + env(safe-area-inset-top));
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove focus outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}