@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #080b11;
  --bg-secondary: #121824;
  --bg-card: rgba(30, 41, 59, 0.4);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-accent: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light theme support via attribute or class */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.7);
  --border-color: rgba(0, 0, 0, 0.06);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Layout container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Header design */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo svg {
  stroke: #818cf8;
}

/* Grid Dashboard */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}

@media (max-width: 900px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* Glassmorphic Card */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-normal), border-color var(--transition-fast);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Task Form styles */
.form-group {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

input[type="text"], input[type="password"] {
  flex: 1;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  outline: none;
  min-height: 48px; /* Tablet-friendly touch target */
  transition: all var(--transition-fast);
}

input[type="text"]:focus, input[type="password"]:focus {
  border-color: var(--border-focus);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Button style */
button, .btn {
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px; /* Tablet-friendly touch target */
  transition: all var(--transition-fast);
}

button:hover, .btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

button:active, .btn:active {
  transform: translateY(1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

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

/* Items List */
.items-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  animation: fadeIn 0.3s ease-out;
}

.item-row:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateX(4px);
}

.item-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.item-checkbox {
  appearance: none;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  display: grid;
  place-content: center;
  min-width: 24px;
  min-height: 24px;
  transition: all var(--transition-fast);
}

.item-checkbox::before {
  content: "";
  width: 0.8rem;
  height: 0.8rem;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--color-accent);
  transform-origin: center;
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}

.item-checkbox:checked {
  border-color: var(--color-accent);
  background: rgba(16, 185, 129, 0.1);
}

.item-checkbox:checked::before {
  transform: scale(1);
}

.item-text {
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.item-row.completed .item-text {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Web Component Styles (Light DOM) */
.webcomponent-card {
  border: 2px dashed rgba(99, 102, 241, 0.3);
  background: rgba(99, 102, 241, 0.03) !important;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 50px;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
}

.badge-green {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.stat-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Footer style */
footer {
  margin-top: 4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
}

.chat-loader {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  border-top-color: #6366f1;
  animation: spin-chat-loader 1s linear infinite;
  display: inline-block;
}

@keyframes spin-chat-loader {
  to { transform: rotate(360deg); }
}