/**
 * ily.dog Design System v2.0
 * A modern, accessible, and beautiful design system
 */

:root {
  /* ========== Colors ========== */
  --color-bg-primary: #0f0f12;
  --color-bg-secondary: #1a1a24;
  --color-bg-tertiary: #252532;
  --color-bg-elevated: #2a2a3a;
  --color-bg-overlay: rgba(0, 0, 0, 0.8);
  
  /* Text colors */
  --color-text-primary: #f0f0f5;
  --color-text-secondary: #a0a0b0;
  --color-text-tertiary: #707080;
  --color-text-muted: #505060;
  
  /* Accent colors */
  --color-accent-primary: #6366f1;
  --color-accent-primary-hover: #818cf8;
  --color-accent-primary-subtle: rgba(99, 102, 241, 0.15);
  
  --color-accent-success: #10b981;
  --color-accent-success-hover: #34d399;
  --color-accent-success-subtle: rgba(16, 185, 129, 0.15);
  
  --color-accent-danger: #ef4444;
  --color-accent-danger-hover: #f87171;
  --color-accent-danger-subtle: rgba(239, 68, 68, 0.15);
  
  --color-accent-warning: #f59e0b;
  --color-accent-warning-hover: #fbbf24;
  --color-accent-warning-subtle: rgba(245, 158, 11, 0.15);
  
  --color-accent-info: #3b82f6;
  --color-accent-info-hover: #60a5fa;
  --color-accent-info-subtle: rgba(59, 130, 246, 0.15);
  
  /* Border colors */
  --color-border-primary: #2a2a3a;
  --color-border-secondary: #3a3a4a;
  --color-border-focus: #6366f1;
  --color-border-error: #ef4444;
  
  /* ========== Typography ========== */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Fira Code', monospace;
  
  /* Font sizes - fluid scale */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-lg: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-xl: clamp(1.15rem, 1.05rem + 0.5vw, 1.25rem);
  --text-2xl: clamp(1.3rem, 1.15rem + 0.75vw, 1.5rem);
  --text-3xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
  --text-4xl: clamp(1.8rem, 1.5rem + 1.5vw, 2.25rem);
  --text-5xl: clamp(2.2rem, 1.8rem + 2vw, 3rem);
  
  /* Font weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Line heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* ========== Spacing ========== */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* ========== Border Radius ========== */
  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* ========== Shadows ========== */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 12px 24px rgba(0,  0, 0, 0.3);
  --shadow-2xl: 0 16px 32px rgba(0, 0, 0, 0.3);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  --shadow-glow-success: 0 0 20px rgba(16, 185, 129, 0.3);
  --shadow-glow-danger: 0 0 20px rgba(239, 68, 68, 0.3);
  
  /* ========== Transitions ========== */
  --transition-fast: 100ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;
  
  /* ========== Z-index ========== */
  --z-0: 0;
  --z-10: 10;
  --z-20: 20;
  --z-30: 30;
  --z-40: 40;
  --z-50: 50;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
  
  /* ========== Breakpoints (for reference) ========== */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

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

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

body {
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== Focus States (Accessibility) ========== */
:focus {
  outline: none;
}

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

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

/* ========== Scrollbar Styling ========== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border-secondary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-accent-primary-hover);
  text-decoration: underline;
}

code, pre {
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
}

code {
  background: var(--color-bg-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

pre {
  background: var(--color-bg-tertiary);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

pre code {
  background: none;
  padding: 0;
}

strong {
  font-weight: var(--font-semibold);
}

em {
  font-style: italic;
}

small {
  font-size: var(--text-sm);
}

/* ========== Layout ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.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-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ========== Cards ========== */
.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: 
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal);
}

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

.card-interactive:hover {
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-primary);
}

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

.card-description {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.card-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-primary);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-family-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: 
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-primary-hover);
  border-color: var(--color-accent-primary-hover);
  box-shadow: var(--shadow-glow);
}

/* Secondary */
.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-color: var(--color-border-secondary);
}

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

/* Success */
.btn-success {
  background: var(--color-accent-success);
  color: white;
  border-color: var(--color-accent-success);
}

.btn-success:hover {
  background: var(--color-accent-success-hover);
  border-color: var(--color-accent-success-hover);
  box-shadow: var(--shadow-glow-success);
}

/* Danger */
.btn-danger {
  background: var(--color-accent-danger);
  color: white;
  border-color: var(--color-accent-danger);
}

.btn-danger:hover {
  background: var(--color-accent-danger-hover);
  border-color: var(--color-accent-danger-hover);
  box-shadow: var(--shadow-glow-danger);
}

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

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

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
}

.btn-outline:hover {
  background: var(--color-accent-primary-subtle);
}

/* Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn-icon {
  padding: var(--space-3);
  aspect-ratio: 1;
}

/* ========== Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  line-height: 1.4;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-accent-primary-subtle);
  color: var(--color-accent-primary);
}

.badge-success {
  background: var(--color-accent-success-subtle);
  color: var(--color-accent-success);
}

.badge-danger {
  background: var(--color-accent-danger-subtle);
  color: var(--color-accent-danger);
}

.badge-warning {
  background: var(--color-accent-warning-subtle);
  color: var(--color-accent-warning);
}

.badge-info {
  background: var(--color-accent-info-subtle);
  color: var(--color-accent-info);
}

.badge-neutral {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
}

.status-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: currentColor;
}

.status-running {
  background: var(--color-accent-success-subtle);
  color: var(--color-accent-success);
}

.status-stopped {
  background: var(--color-accent-danger-subtle);
  color: var(--color-accent-danger);
}

.status-pending {
  background: var(--color-accent-warning-subtle);
  color: var(--color-accent-warning);
}

.status-idle {
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
}

/* ========== Forms ========== */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-lg);
  transition: 
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px var(--color-accent-primary-subtle);
  outline: none;
}

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

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--color-accent-danger);
}

.form-error {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-accent-danger);
}

.form-hint {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ========== Alerts ========== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.alert-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-message {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.alert-success {
  background: var(--color-accent-success-subtle);
  border: 1px solid var(--color-accent-success);
}

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

.alert-warning {
  background: var(--color-accent-warning-subtle);
  border: 1px solid var(--color-accent-warning);
}

.alert-info {
  background: var(--color-accent-info-subtle);
  border: 1px solid var(--color-accent-info);
}

/* ========== Stats ========== */
.stat-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
}

.stat-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-3);
}

.stat-value {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-none);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

/* ========== Modals ========== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity var(--transition-normal),
    visibility var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal {
  transform: scale(1) translateY(0);
}

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

.modal-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--text-xl);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: 
    background var(--transition-fast),
    color var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-6);
  border-top: 1px solid var(--color-border-primary);
}

/* ========== Toasts ========== */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transform: translateX(120%);
  transition: transform var(--transition-normal);
}

.toast.show {
  transform: translateX(0);
}

.toast-icon {
  font-size: var(--text-lg);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

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

.toast-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

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

/* Toast variants */
.toast-success { border-left: 4px solid var(--color-accent-success); }
.toast-danger { border-left: 4px solid var(--color-accent-danger); }
.toast-warning { border-left: 4px solid var(--color-accent-warning); }
.toast-info { border-left: 4px solid var(--color-accent-info); }

/* ========== Skeleton Loading ========== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

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

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 1.5em;
  width: 60%;
  margin-bottom: var(--space-4);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton-card {
  height: 200px;
}

/* ========== Utilities ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent-primary); }
.text-success { color: var(--color-accent-success); }
.text-danger { color: var(--color-accent-danger); }
.text-warning { color: var(--color-accent-warning); }

.bg-primary { background: var(--color-bg-primary); }
.bg-secondary { background: var(--color-bg-secondary); }
.bg-tertiary { background: var(--color-bg-tertiary); }

.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

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

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

/* ========== Animations ========== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(-5%);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }
  50% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier( 0, 0, 0.2, 1);
  }
}

.animate-fade-in { animation: fadeIn var(--transition-normal) forwards; }
.animate-fade-in-up { animation: fadeInUp var(--transition-slow) forwards; }
.animate-fade-in-down { animation: fadeInDown var(--transition-slow) forwards; }
.animate-slide-in-right { animation: slideInRight var(--transition-slow) forwards; }
.animate-slide-in-left { animation: slideInLeft var(--transition-slow) forwards; }
.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }
.animate-spin { animation: spin 1s linear infinite; }
.animate-bounce { animation: bounce 1s infinite; }

/* ========== Header ========== */
.header {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-primary);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  text-decoration: none;
}

.header-logo:hover {
  text-decoration: none;
  color: var(--color-accent-primary);
}

.header-logo-icon {
  font-size: var(--text-2xl);
}

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

.header-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  transition: 
    background var(--transition-fast),
    color var(--transition-fast);
}

.header-nav a:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  text-decoration: none;
}

.header-nav a.active {
  background: var(--color-accent-primary-subtle);
  color: var(--color-accent-primary);
}

/* ========== Footer ========== */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-primary);
  padding: var(--space-8) 0;
  margin-top: var(--space-16);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .header-nav {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .card {
    padding: var(--space-4);
  }
  
  .modal {
    margin: var(--space-4);
    max-width: calc(100% - var(--space-8));
  }
}