/* Native Dark Flat UI Theme for CyberDental Report */

:root {
  /* Safe area variables for iPhone X+ */
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  
  /* Responsive spacing */
  --spacing-mobile: 12px;
  --spacing-tablet: 16px;
  --spacing-desktop: 24px;
  
  /* Touch targets (minimum 44px for iOS) */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;
  
  /* Mobile-first breakpoints */
  --breakpoint-xs: 320px;  /* iPhone SE */
  --breakpoint-sm: 375px;  /* iPhone 6/7/8 */
  --breakpoint-md: 414px;  /* iPhone Plus */
  --breakpoint-lg: 768px;  /* iPad */
  --breakpoint-xl: 1024px; /* iPad Pro */
  --breakpoint-xxl: 1280px; /* Desktop */
  
  /* Fluid typography */
  --font-size-xs: clamp(0.75rem, 2vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 2.5vw, 1rem);
  --font-size-base: clamp(1rem, 3vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 4vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 5vw, 2rem);
  --font-size-3xl: clamp(2rem, 6vw, 3rem);
  
  /* Dark Theme Colors */
  --bg-primary: #0a0a0a;        /* Main background - Pure black */
  --bg-secondary: #141414;      /* Card backgrounds */
  --bg-tertiary: #1a1a1a;       /* Hover states */
  --bg-elevated: #1f1f1f;       /* Elevated surfaces */
  --bg-hover: #242424;          /* Hover backgrounds */
  
  /* Border Colors */
  --border-primary: #2a2a2a;    /* Main borders */
  --border-secondary: #333333;  /* Secondary borders */
  --border-focus: #4a4a4a;      /* Focus borders */
  
  /* Text Colors */
  --text-primary: #ffffff;       /* Primary text */
  --text-secondary: #a0a0a0;    /* Secondary text */
  --text-tertiary: #6b6b6b;     /* Muted text */
  --text-disabled: #4a4a4a;     /* Disabled text */
  
  /* Accent Colors */
  --accent-primary: #3b82f6;    /* Primary blue */
  --accent-success: #10b981;    /* Success green */
  --accent-warning: #f59e0b;    /* Warning amber */
  --accent-danger: #ef4444;     /* Danger red */
  --accent-special: #8b5cf6;    /* Special attention purple */
  
  /* Special Attention Colors */
  --special-bg: #1a0f1f;         /* Dark purple tint */
  --special-border: #8b5cf6;     /* Purple border */
  --special-text: #c4b5fd;       /* Light purple text */
  
  /* Interactive States */
  --hover-opacity: 0.08;
  --active-opacity: 0.12;
  --disabled-opacity: 0.38;
  
  /* Shadows (minimal for flat design) */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.5);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius (flat but modern) */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scrollbar-gutter: stable;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 
               system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 14px;
  overflow-x: hidden;
  scroll-behavior: smooth;
  overscroll-behavior-y: contain;
}

/* Custom Scrollbar for Webkit */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-focus);
}

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-secondary) var(--bg-secondary);
}

/* Selection Colors */
::selection {
  background: var(--accent-primary);
  color: white;
  opacity: 0.99;
}

/* Focus Visible (Keyboard Navigation) */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Native-like Animations */
@media (prefers-reduced-motion: no-preference) {
  * {
    transition-property: color, background-color, border-color, 
                        text-decoration-color, fill, stroke, opacity, 
                        box-shadow, transform, filter, backdrop-filter;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
  }
}

/* Container Layout */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Native Header Bar */
.header-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(20, 20, 20, 0.8);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-title {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.header-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-left: var(--spacing-md);
}

/* Native-like Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

/* Ripple Effect for Buttons */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn:hover::before {
  opacity: var(--hover-opacity);
}

.btn:active::before {
  opacity: var(--active-opacity);
}

/* Button Variants */
.btn-primary {
  background: var(--accent-primary);
  color: white;
}

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

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

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-danger {
  background: transparent;
  color: var(--accent-danger);
  border: 1px solid var(--accent-danger);
}

.btn-danger:hover {
  background: var(--accent-danger);
  color: white;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

/* Native-like Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--border-secondary);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

/* Native-like Table */
.table-container {
  overflow: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
  background: var(--bg-secondary);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table thead {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  position: sticky;
  top: 0;
  z-index: 10;
}

.table th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
  user-select: none;
}

.table th:hover {
  color: var(--text-primary);
  cursor: pointer;
}

.table tbody tr {
  border-bottom: 1px solid var(--border-primary);
  transition: all var(--transition-fast);
}

.table tbody tr:hover {
  background: var(--bg-hover);
}

.table tbody tr.selected {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent-primary);
}

.table tbody tr.special-attention {
  background: var(--special-bg);
  border-left: 3px solid var(--special-border);
}

.table tbody tr.special-attention:hover {
  background: rgba(139, 92, 246, 0.1);
}

.table td {
  padding: var(--spacing-md);
  color: var(--text-primary);
  white-space: nowrap;
}

.table td.muted {
  color: var(--text-tertiary);
}

/* Native-like Checkbox */
.checkbox {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
}

.checkbox:hover {
  border-color: var(--accent-primary);
  background: var(--bg-hover);
}

.checkbox:checked {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkbox:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 12px;
  font-weight: bold;
}

.checkbox:focus-visible {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Native-like Input Fields */
.input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.input:hover {
  border-color: var(--border-secondary);
}

.input:focus {
  border-color: var(--accent-primary);
  background: var(--bg-secondary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Native-like Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-primary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-success);
  border-color: rgba(16, 185, 129, 0.3);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-warning);
  border-color: rgba(245, 158, 11, 0.3);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-danger);
  border-color: rgba(239, 68, 68, 0.3);
}

.badge-special {
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-special);
  border-color: rgba(139, 92, 246, 0.3);
}

/* Stats Cards with Native Feel */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--border-secondary);
  background: var(--bg-elevated);
  transform: scale(1.02);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.05em;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-change {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  font-size: 0.875rem;
}

.stat-change.positive {
  color: var(--accent-success);
}

.stat-change.negative {
  color: var(--accent-danger);
}

/* Native Notice/Alert Box */
.notice {
  background: var(--bg-elevated);
  border: 1px solid var(--accent-warning);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  display: flex;
  gap: var(--spacing-md);
  animation: slideDown var(--transition-slow);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.notice-icon {
  font-size: 1.5rem;
  color: var(--accent-warning);
  flex-shrink: 0;
}

.notice-content {
  flex: 1;
}

.notice-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.notice-message {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Loading States */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 25%,
    var(--bg-elevated) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton 1.5s infinite;
}

@keyframes skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  min-width: 300px;
  box-shadow: var(--shadow-lg);
  animation: slideIn var(--transition-base);
  z-index: 1000;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.success {
  border-color: var(--accent-success);
}

.toast.error {
  border-color: var(--accent-danger);
}

.toast.fade-out {
  animation: slideOut var(--transition-base);
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Ripple Effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple-animation 0.6s ease-out;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .table-container {
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
  
  .toast {
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: var(--spacing-md);
  }
}

/* Print Styles */
@media print {
  body {
    background: white;
    color: black;
  }
  
  .btn,
  .dropdown,
  .modal-backdrop,
  .toast {
    display: none !important;
  }
  
  .table {
    border: 1px solid #ccc;
  }
  
  .table th,
  .table td {
    border: 1px solid #ccc;
  }
}

/* Accessibility */
@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;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --text-primary: #ffffff;
    --border-primary: #ffffff;
    --accent-primary: #00b4d8;
  }
}