/* =========================================
   Life Command Center - Design System
   Premium Dark Theme with Glassmorphism
   ========================================= */

/* ---- CSS Variables ---- */
:root {
  /* Colors - Dark Premium Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: rgba(25, 25, 35, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);

  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(
    135deg,
    #6366f1 0%,
    #8b5cf6 50%,
    #a855f7 100%
  );
  --accent-glow: rgba(99, 102, 241, 0.4);

  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  /* Priority Colors */
  --priority-high: #ef4444;
  --priority-medium: #f59e0b;
  --priority-low: #10b981;

  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Borders & Shadows */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

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

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

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Outfit", var(--font-sans);
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(0, 0, 0, 0.02);
  
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Animated Background */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(
      ellipse at 20% 20%,
      rgba(99, 102, 241, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 80% 80%,
      rgba(139, 92, 246, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(168, 85, 247, 0.05) 0%,
      transparent 70%
    );
  pointer-events: none;
  z-index: -1;
}

/* ---- Typography ---- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
}
h2 {
  font-size: 1.75rem;
}
h3 {
  font-size: 1.25rem;
}

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

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

/* ---- Layout ---- */
.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: width var(--transition-base);
  overflow-x: hidden;
}

.sidebar.collapsed {
  width: 80px;
  padding: var(--space-lg) var(--space-sm);
}

.sidebar.collapsed .nav-logo {
  justify-content: center;
  font-size: 1.2rem;
}

.sidebar.collapsed .nav-item span:not(.nav-icon) {
  display: none;
}

.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: var(--space-sm);
}

.sidebar.collapsed .nav-icon {
  margin: 0;
  font-size: 1.5rem;
}

.sidebar.collapsed .btn {
  padding: var(--space-sm);
}
.sidebar.collapsed .btn span:not(.nav-icon) {
   display: none;
}

.main-content {
  flex: 1;
  margin-left: 280px;
  padding: var(--space-xl);
  min-height: 100vh;
  transition: margin-left var(--transition-base);
}

.sidebar.collapsed + .main-content,
body:has(.sidebar.collapsed) .main-content { /* Fallback/Support */
  margin-left: 80px;
}

/* ---- Glass Cards ---- */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

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

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

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

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

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

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ---- Form Elements ---- */
.input,
.textarea,
.select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

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

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

.textarea {
  min-height: 100px;
  resize: vertical;
}

/* ---- Task Items ---- */
.task-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.task-item:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
}

.task-item.done {
  opacity: 0.6;
}

.task-item.done .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-checkbox {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border-hover);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.task-checkbox.checked {
  background: var(--accent-gradient);
  border-color: transparent;
}

.task-checkbox.checked::after {
  content: "✓";
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
}

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

.task-title {
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.task-meta {
  display: flex;
  gap: var(--space-md);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Priority Badge */
.priority-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.priority-badge.high {
  background: rgba(239, 68, 68, 0.15);
  color: var(--priority-high);
}

.priority-badge.medium {
  background: rgba(245, 158, 11, 0.15);
  color: var(--priority-medium);
}

.priority-badge.low {
  background: rgba(16, 185, 129, 0.15);
  color: var(--priority-low);
}

/* ---- Dashboard Widgets ---- */
.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.stat-widget {
  text-align: center;
  padding: var(--space-xl);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

/* ---- AI Coach ---- */
.ai-chat {
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.1) 0%,
    rgba(139, 92, 246, 0.05) 100%
  );
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.ai-message {
  padding: var(--space-md);
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-primary);
  line-height: 1.7;
}

.ai-message strong {
  color: var(--accent-primary);
}

/* ---- Navigation ---- */
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

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

.nav-item.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
}

.nav-icon {
  font-size: 1.25rem;
  width: 24px;
  text-align: center;
}

/* ---- Modal ---- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: all var(--transition-base);
}

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

/* ---- Utilities ---- */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-sm {
  gap: var(--space-sm);
}
.gap-md {
  gap: var(--space-md);
}
.gap-lg {
  gap: var(--space-lg);
}
.mt-md {
  margin-top: var(--space-md);
}
.mt-lg {
  margin-top: var(--space-lg);
}
.mb-md {
  margin-bottom: var(--space-md);
}
.mb-lg {
  margin-bottom: var(--space-lg);
}
.text-muted {
  color: var(--text-muted);
}
.text-sm {
  font-size: 0.875rem;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .main-content {
    margin-left: 0;
    padding: var(--space-md);
  }

  .widget-grid {
    grid-template-columns: 1fr;
  }

  .app {
    flex-direction: column;
  }

  .nav-menu {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

/* ---- Animations ---- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

.loading {
  animation: pulse 1.5s infinite;
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* ---- Project Badge ---- */
.project-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
}

/* ---- Assignee Badge ---- */
.assignee-badge {
  color: var(--text-muted);
}

/* ---- Dashboard Widgets ---- */
.dashboard-widgets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

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

.widget.dragging {
  opacity: 0.5;
  transform: scale(0.98);
}

.widget.drag-over {
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px var(--accent-glow);
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  font-weight: 600;
}

.widget-drag-handle {
  cursor: grab;
  opacity: 0.5;
  font-size: 0.75rem;
  padding: var(--space-xs);
  width: auto;
  height: auto;
}

.widget-drag-handle:hover {
  opacity: 1;
}

.widget-sm {
  grid-column: span 1;
}

.widget-lg {
  grid-column: span 2;
}

.widget-full {
  grid-column: span 3;
}

.widget.hidden {
  display: none;
}

.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
}

.mt-sm {
  margin-top: var(--space-sm);
}

@media (max-width: 1200px) {
  .dashboard-widgets {
    grid-template-columns: repeat(2, 1fr);
  }
  .widget-lg {
    grid-column: span 2;
  }
  .widget-full {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .dashboard-widgets {
    grid-template-columns: 1fr;
  }
  .widget-sm, .widget-lg, .widget-full {
    grid-column: span 1;
  }
}