/* 
 * AgentEPC Design System v2.0
 * Dark theme design standard implementation - ENHANCED
 * March 2026
 */

/* ========================================
   CSS Custom Properties / Design Tokens
   ======================================== */

:root {
  /* Backgrounds */
  --color-bg-primary: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #1c2128;
  --color-bg-quaternary: #21262d;
  --color-bg-overlay: #2d333b;
  
  /* Text */
  --color-text-primary: #f0f6fc;
  --color-text-secondary: #8b949e;
  --color-text-muted: #656d76;
  --color-text-disabled: #484f58;
  --color-text-inverse: #0d1117;
  
  /* Brand & Actions */
  --color-primary: #238636;
  --color-primary-hover: #2ea043;
  --color-secondary: #1f6feb;
  --color-secondary-hover: #388bfd;
  
  /* Status */
  --color-success: #238636;
  --color-success-bg: #0f2419;
  --color-warning: #d29922;
  --color-warning-bg: #2d2107;
  --color-error: #da3633;
  --color-error-bg: #2d1519;
  --color-info: #1f6feb;
  --color-info-bg: #0c2d6b;
  
  /* Borders & UI */
  --color-border-primary: #30363d;
  --color-border-secondary: #21262d;
  --color-border-accent: #f78166;
  --color-shadow: rgba(0,0,0,0.3);
  
  /* Spacing - 4px grid system */
  --space-0: 0px;
  --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;
  --space-16: 64px;
  
  /* Layout */
  --sidebar-width: 240px;
  --header-height: 60px;
  --border-radius: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 20px;
  --font-size-display: 30px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  
  /* Phase Colors (from DESIGN_SYSTEM.md) */
  --phase-onboarding-bg: rgba(59,130,246,0.15);
  --phase-onboarding-text: #60a5fa;
  --phase-onboarding-border: #3b82f6;
  
  --phase-engineering-bg: rgba(168,85,247,0.15);
  --phase-engineering-text: #c084fc;
  --phase-engineering-border: #8b5cf6;
  
  --phase-permitting-bg: rgba(236,72,153,0.15);
  --phase-permitting-text: #f472b6;
  --phase-permitting-border: #ec4899;
  
  --phase-ntp-bg: rgba(251,146,60,0.15);
  --phase-ntp-text: #fb923c;
  --phase-ntp-border: #f97316;
  
  --phase-pre-installation-bg: rgba(250,204,21,0.15);
  --phase-pre-installation-text: #facc15;
  --phase-pre-installation-border: #eab308;
  
  --phase-installation-bg: rgba(52,211,153,0.15);
  --phase-installation-text: #34d399;
  --phase-installation-border: #10b981;
  
  --phase-funding-bg: rgba(45,212,191,0.15);
  --phase-funding-text: #2dd4bf;
  --phase-funding-border: #14b8a6;
  
  --phase-inspection-bg: rgba(96,165,250,0.15);
  --phase-inspection-text: #60a5fa;
  --phase-inspection-border: #3b82f6;
  
  --phase-pto-bg: rgba(74,222,128,0.15);
  --phase-pto-text: #4ade80;
  --phase-pto-border: #22c55e;
  
  --phase-completion-bg: rgba(34,197,94,0.15);
  --phase-completion-text: #22c55e;
  --phase-completion-border: #16a34a;
  
  --phase-maintenance-bg: rgba(148,163,184,0.15);
  --phase-maintenance-text: #94a3b8;
  --phase-maintenance-border: #64748b;
}

/* ========================================
   Base/Reset Styles
   ======================================== */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Typography scale */
h1 { font-size: var(--font-size-display); line-height: 1.2; }
.h1 { font-size: var(--font-size-xl); line-height: 1.3; }
.h2 { font-size: var(--font-size-lg); line-height: 1.3; }
.h3 { font-size: var(--font-size-base); line-height: 1.4; font-weight: 600; }

p {
  margin: 0 0 var(--space-4) 0;
  color: var(--color-text-primary);
}

/* Global dark theme for native form elements */
input, select, textarea, button {
  color: var(--color-text-primary);
  font-family: inherit;
}

input, select, textarea {
  background: var(--color-bg-quaternary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius);
}

select option {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-muted);
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary-hover);
}

/* ========================================
   ENHANCED: Loading Skeleton Styles
   ======================================== */

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-quaternary) 25%, var(--color-bg-overlay) 50%, var(--color-bg-quaternary) 75%);
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
  border-radius: var(--border-radius);
}

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

.skeleton-table {
  width: 100%;
  border-collapse: collapse;
}

.skeleton-table th {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-primary);
  padding: var(--space-2) var(--space-3);
  height: 32px;
}

.skeleton-table td {
  padding: var(--space-2) var(--space-3);
  height: 40px;
  border-bottom: 1px solid var(--color-border-secondary);
}

.skeleton-row {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-4);
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-text-sm { height: 12px; }
.skeleton-text-lg { height: 20px; }

/* ========================================
   ENHANCED: Toast Notification Styles
   ======================================== */

.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 400px;
}

.toast {
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-4);
  box-shadow: 0 8px 32px rgba(0,0,0,0.16);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 320px;
  animation: toast-slide-in 0.3s ease-out;
  position: relative;
}

@keyframes toast-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.toast-exit {
  animation: toast-slide-out 0.3s ease-in forwards;
}

@keyframes toast-slide-out {
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  margin-top: 1px;
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-weight: 600;
  font-size: var(--font-size-base);
  margin-bottom: var(--space-1);
  color: var(--color-text-primary);
}

.toast-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.toast-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.toast-action {
  font-size: var(--font-size-sm);
  font-weight: 500;
  background: transparent;
  border: none;
  color: var(--color-secondary);
  cursor: pointer;
  padding: var(--space-1) 0;
}

.toast-action:hover {
  color: var(--color-secondary-hover);
}

.toast-close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--border-radius);
  font-size: 16px;
}

.toast-close:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-quaternary);
}

/* Toast variants */
.toast-success {
  border-left: 4px solid var(--color-success);
}
.toast-success .toast-icon {
  background: var(--color-success);
  color: white;
}

.toast-error {
  border-left: 4px solid var(--color-error);
}
.toast-error .toast-icon {
  background: var(--color-error);
  color: white;
}

.toast-warning {
  border-left: 4px solid var(--color-warning);
}
.toast-warning .toast-icon {
  background: var(--color-warning);
  color: white;
}

.toast-info {
  border-left: 4px solid var(--color-info);
}
.toast-info .toast-icon {
  background: var(--color-info);
  color: white;
}

/* ========================================
   ENHANCED: Empty State Styles
   ======================================== */

.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  max-width: 480px;
  margin: 0 auto;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  background: var(--color-bg-quaternary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--color-text-muted);
  border: 2px solid var(--color-border-primary);
}

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

.empty-state-message {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-6);
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
}

.empty-state-action {
  margin-top: var(--space-4);
}

/* ========================================
   ENHANCED: Error Boundary Styles
   ======================================== */

.error-boundary {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  text-align: center;
  margin: var(--space-4) 0;
}

.error-boundary-icon {
  font-size: 48px;
  color: var(--color-error);
  margin-bottom: var(--space-4);
}

.error-boundary-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-error);
  margin-bottom: var(--space-2);
}

.error-boundary-message {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.error-boundary-details {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  padding: var(--space-3);
  font-family: 'Courier New', monospace;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: left;
  overflow-x: auto;
  margin: var(--space-4) 0;
}

/* ========================================
   ENHANCED: Unsaved Changes Indicator
   ======================================== */

.unsaved-indicator {
  position: fixed;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning);
  color: var(--color-warning);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  z-index: 500;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  animation: unsaved-pulse 2s infinite;
}

@keyframes unsaved-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.unsaved-dot {
  width: 8px;
  height: 8px;
  background: var(--color-warning);
  border-radius: 50%;
  animation: unsaved-dot-pulse 1.5s ease-in-out infinite;
}

@keyframes unsaved-dot-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* ========================================
   ENHANCED: Focus Ring Improvements
   ======================================== */

/* Enhanced focus styles for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-border-accent);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

.btn:focus-visible {
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--color-bg-primary), 0 0 0 4px var(--color-border-accent);
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: 1000;
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.skip-to-content:focus {
  top: 6px;
}

/* ========================================
   Button Components (Enhanced)
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: 500;
  font-family: inherit;
  height: 36px;
  cursor: pointer;
  border: 1px solid var(--color-border-primary);
  background: var(--color-bg-quaternary);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  position: relative;
  min-width: 44px; /* Accessibility touch target */
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-loading {
  color: transparent;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 1s linear infinite;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-text-primary);
}

@keyframes btn-spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-primary.btn-loading::after {
  color: white;
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-quaternary);
  border-color: var(--color-border-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-quaternary);
  color: var(--color-text-primary);
}

.btn-danger {
  background: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background: #f85149;
  border-color: #f85149;
}

.btn-danger.btn-loading::after {
  color: white;
}

/* Button sizes */
.btn-sm {
  height: 28px;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-sm);
  min-width: 28px;
}

.btn-lg {
  height: 44px;
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-lg);
  min-width: 44px;
}

/* ========================================
   Status Badges/Pills (Enhanced)
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 4px;
  padding: 2px 6px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  line-height: 14px;
  border: 1px solid;
  gap: var(--space-1);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success);
}

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

.badge-error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border-color: var(--color-error);
}

.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border-color: var(--color-info);
}

.badge-secondary {
  background: var(--color-bg-quaternary);
  color: var(--color-text-secondary);
  border-color: var(--color-border-primary);
}

/* Phase badges */
.badge-phase {
  text-transform: none;
  font-weight: 500;
  letter-spacing: normal;
}

.badge-onboarding { background: var(--phase-onboarding-bg); color: var(--phase-onboarding-text); border-color: var(--phase-onboarding-border); }
.badge-engineering { background: var(--phase-engineering-bg); color: var(--phase-engineering-text); border-color: var(--phase-engineering-border); }
.badge-permitting { background: var(--phase-permitting-bg); color: var(--phase-permitting-text); border-color: var(--phase-permitting-border); }
.badge-ntp { background: var(--phase-ntp-bg); color: var(--phase-ntp-text); border-color: var(--phase-ntp-border); }
.badge-pre-installation { background: var(--phase-pre-installation-bg); color: var(--phase-pre-installation-text); border-color: var(--phase-pre-installation-border); }
.badge-installation { background: var(--phase-installation-bg); color: var(--phase-installation-text); border-color: var(--phase-installation-border); }
.badge-funding { background: var(--phase-funding-bg); color: var(--phase-funding-text); border-color: var(--phase-funding-border); }
.badge-inspection { background: var(--phase-inspection-bg); color: var(--phase-inspection-text); border-color: var(--phase-inspection-border); }
.badge-pto { background: var(--phase-pto-bg); color: var(--phase-pto-text); border-color: var(--phase-pto-border); }
.badge-completion { background: var(--phase-completion-bg); color: var(--phase-completion-text); border-color: var(--phase-completion-border); }
.badge-maintenance { background: var(--phase-maintenance-bg); color: var(--phase-maintenance-text); border-color: var(--phase-maintenance-border); }

/* ========================================
   Form Inputs (Enhanced)
   ======================================== */

.input {
  background: var(--color-bg-quaternary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text-primary);
  height: 36px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  min-height: 44px; /* Touch target */
}

.input:focus {
  outline: none;
  border-color: var(--color-border-accent);
  box-shadow: 0 0 0 1px var(--color-border-accent);
}

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

.input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Input validation states */
.input-error {
  border-color: var(--color-error);
}

.input-error:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 1px var(--color-error);
}

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

.select {
  background: var(--color-bg-quaternary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text-primary);
  height: 36px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  appearance: none;
  background-image: url('data:image/svg+xml;charset=US-ASCII,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" fill="%23656d76"><path d="M4.427 6.427a.6.6 0 0 1 .849 0L8 9.152l2.724-2.725a.6.6 0 1 1 .849.849l-3.15 3.15a.6.6 0 0 1-.849 0l-3.15-3.15a.6.6 0 0 1 0-.849Z"/></svg>');
  background-repeat: no-repeat;
  background-position: right var(--space-2) center;
  padding-right: 32px;
  min-height: 44px;
}

.select:focus {
  outline: none;
  border-color: var(--color-border-accent);
  box-shadow: 0 0 0 1px var(--color-border-accent);
}

.textarea {
  background: var(--color-bg-quaternary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius);
  padding: var(--space-3);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  resize: vertical;
  min-height: 80px;
  line-height: 1.5;
}

.textarea:focus {
  outline: none;
  border-color: var(--color-border-accent);
  box-shadow: 0 0 0 1px var(--color-border-accent);
}

.label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.label-required::after {
  content: ' *';
  color: var(--color-error);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-help {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: var(--space-1);
}

.file-upload {
  border: 2px dashed var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  text-align: center;
  background: var(--color-bg-tertiary);
  transition: border-color var(--transition-fast);
  cursor: pointer;
}

.file-upload:hover {
  border-color: var(--color-border-accent);
}

.file-upload-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-2);
}

.file-upload-subtext {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ========================================
   Tables (Enhanced)
   ======================================== */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-base);
  background: transparent;
}

.table th {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-primary);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: left;
  color: var(--color-text-secondary);
  height: 32px;
  letter-spacing: 0.25px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.table th.sortable {
  cursor: pointer;
  user-select: none;
}

.table th.sortable:hover {
  background: var(--color-bg-tertiary);
}

.table th .sort-indicator {
  margin-left: var(--space-1);
  opacity: 0.5;
}

.table th.sorted .sort-indicator {
  opacity: 1;
}

.table td {
  border-bottom: 1px solid var(--color-border-secondary);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-primary);
  height: 48px;
  vertical-align: middle;
}

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

.table-compact td {
  height: 36px;
  padding: var(--space-1) var(--space-3);
}

.table-comfortable td {
  height: 56px;
  padding: var(--space-3);
}

/* Table alignment helpers */
.table .text-right { text-align: right; }
.table .text-center { text-align: center; }

/* Checkbox column */
.table-checkbox {
  width: 40px;
  padding-left: var(--space-3);
  padding-right: var(--space-2);
}

/* Actions column */
.table-actions {
  width: 120px;
  text-align: right;
}

/* ========================================
   Cards (Enhanced)
   ======================================== */

.card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-4);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  border-color: var(--color-border-accent);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.card-header {
  border-bottom: 1px solid var(--color-border-primary);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: var(--space-1) 0 0 0;
}

.card-actions {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-primary);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* ========================================
   Tabs (Enhanced)
   ======================================== */

.tabs {
  border-bottom: 1px solid var(--color-border-primary);
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-5);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  padding: var(--space-3) 0;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.tab.active {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-primary);
}

.tab:hover {
  color: var(--color-text-primary);
}

.tab:focus-visible {
  outline: 2px solid var(--color-border-accent);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

/* ========================================
   Avatar/User Circles (Enhanced)
   ======================================== */

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  flex-shrink: 0;
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-sm {
  width: 24px;
  height: 24px;
  font-size: var(--font-size-xs);
}

.avatar-lg {
  width: 48px;
  height: 48px;
  font-size: var(--font-size-base);
}

.avatar-xl {
  width: 64px;
  height: 64px;
  font-size: var(--font-size-lg);
}

/* ========================================
   Progress Bars (Enhanced)
   ======================================== */

.progress {
  background: var(--color-bg-quaternary);
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
  width: 100%;
  position: relative;
}

.progress-fill {
  background: var(--color-primary);
  height: 100%;
  border-radius: 4px;
  transition: width var(--transition-normal);
}

.progress-sm { height: 4px; }
.progress-lg { height: 8px; }

.progress-striped .progress-fill {
  background-image: linear-gradient(45deg, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
  background-size: 16px 16px;
  animation: progress-stripe 1s linear infinite;
}

@keyframes progress-stripe {
  from { background-position: 16px 0; }
  to { background-position: 0 0; }
}

/* ========================================
   Navigation Items (Enhanced)
   ======================================== */

.nav-item {
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--border-radius);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  border-left: 2px solid transparent;
  position: relative;
}

.nav-item:hover {
  background: var(--color-bg-quaternary);
  color: var(--color-text-primary);
}

.nav-item.active {
  background: var(--color-bg-overlay);
  color: var(--color-text-primary);
  border-left-color: var(--color-primary);
}

.nav-item:focus-visible {
  outline: 2px solid var(--color-border-accent);
  outline-offset: 2px;
}

.nav-icon {
  width: 18px;
  height: 18px;
  margin-right: var(--space-2);
  opacity: 0.8;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-badge {
  margin-left: auto;
  font-size: 10px;
  padding: 1px 4px;
  border-radius: 8px;
  background: var(--color-error);
  color: white;
  min-width: 16px;
  text-align: center;
  font-weight: 600;
}

.nav-recent-views {
  padding: 2px 0 6px 0;
  margin-left: 28px;
}

.nav-recent-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-recent-item:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

.nav-recent-dot {
  color: var(--color-primary);
  font-size: 14px;
  flex-shrink: 0;
}

.nav-recent-name {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========================================
   Search Inputs (Enhanced)
   ======================================== */

.search {
  position: relative;
  width: 100%;
}

.search-input {
  padding-left: 36px;
  background-image: url('data:image/svg+xml;charset=US-ASCII,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" fill="%23656d76"><path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z"/></svg>');
  background-repeat: no-repeat;
  background-position: var(--space-2) center;
}

.search-clear {
  position: absolute;
  right: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--border-radius);
  font-size: 16px;
}

.search-clear:hover {
  background: var(--color-bg-overlay);
  color: var(--color-text-primary);
}

/* ========================================
   Modals/Overlays (Enhanced)
   ======================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-4);
}

.modal-overlay.active,
.modal-overlay.show {
  display: flex;
}

.modal {
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-xl);
  padding: 0;
  max-width: 600px;
  max-height: 80vh;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px var(--color-shadow);
  margin: var(--space-4);
  width: 100%;
  display: flex;
  flex-direction: column;
}

.modal-sm { max-width: 400px; }
.modal-lg { max-width: 720px; }
.modal-xl { max-width: 1200px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-6) var(--space-4);
  border-bottom: 1px solid var(--color-border-primary);
  flex-shrink: 0;
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--space-4) var(--space-6) var(--space-6);
  border-top: 1px solid var(--color-border-primary);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  font-size: 24px;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--color-bg-quaternary);
  color: var(--color-text-primary);
}

/* ========================================
   Breadcrumbs (Enhanced)
   ======================================== */

.breadcrumbs {
  display: flex;
  align-items: center;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  overflow-x: auto;
  scrollbar-width: none;
}

.breadcrumbs::-webkit-scrollbar {
  display: none;
}

.breadcrumb-item {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.breadcrumb-item:hover {
  color: var(--color-text-primary);
}

.breadcrumb-item:focus-visible {
  outline: 2px solid var(--color-border-accent);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

.breadcrumb-separator {
  margin: 0 var(--space-2);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.breadcrumb-item.active {
  color: var(--color-text-primary);
  font-weight: 500;
}

/* ========================================
   Utility Classes (Enhanced)
   ======================================== */

/* Spacing */
.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Text */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-disabled { color: var(--color-text-disabled); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-display { font-size: var(--font-size-display); }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }

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

/* Flex Layouts */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-baseline { align-items: baseline; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-around { justify-content: space-around; }
.flex-1 { flex: 1; }
.flex-none { flex: none; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.gap-0 { gap: 0; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Grid */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-12 { grid-template-columns: repeat(12, 1fr); }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }

/* Width/Height */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-fit { width: fit-content; }
.h-full { height: 100%; }
.h-auto { height: auto; }
.h-fit { height: fit-content; }
.min-w-0 { min-width: 0; }
.min-h-0 { min-height: 0; }

/* Display */
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }
.hidden { display: none; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }

/* Border */
.border { border: 1px solid var(--color-border-primary); }
.border-0 { border: 0; }
.border-t { border-top: 1px solid var(--color-border-primary); }
.border-b { border-bottom: 1px solid var(--color-border-primary); }
.border-l { border-left: 1px solid var(--color-border-primary); }
.border-r { border-right: 1px solid var(--color-border-primary); }

.rounded-none { border-radius: 0; }
.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-xl { border-radius: var(--border-radius-xl); }
.rounded-full { border-radius: 50%; }

/* Background */
.bg-transparent { background-color: transparent; }
.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-tertiary { background-color: var(--color-bg-tertiary); }
.bg-quaternary { background-color: var(--color-bg-quaternary); }
.bg-overlay { background-color: var(--color-bg-overlay); }

/* Cursor */
.cursor-default { cursor: default; }
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }
.cursor-text { cursor: text; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-hidden { overflow-x: hidden; }
.overflow-y-hidden { overflow-y: hidden; }

/* Z-index */
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Pointer events */
.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

/* Select */
.select-none { user-select: none; }
.select-text { user-select: text; }
.select-all { user-select: all; }

/* Screen reader only */
.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;
}

/* ========================================
   RESPONSIVE BREAKPOINTS
   ======================================== */

/* Mobile first approach */
@media (min-width: 768px) {
  .md\:block { display: block; }
  .md\:hidden { display: none; }
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:block { display: block; }
  .lg\:hidden { display: none; }
  .lg\:flex { display: flex; }
  .lg\:grid { display: grid; }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1280px) {
  .xl\:block { display: block; }
  .xl\:hidden { display: none; }
  .xl\:flex { display: flex; }
  .xl\:grid { display: grid; }
  .xl\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .xl\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
}