/**
 * QuickTask v2 - Minimal Design System
 * Inspired by ftre.co with subtle glassmorphism
 */

/* ============================================
   Design System Variables
   ============================================ */
:root {
  /* Light Mode Colors */
  --bg-primary: #F5F5F5;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #E8E8E8;

  --text-primary: #1A1A1A;
  --text-secondary: #5F6567;
  --text-tertiary: #9CA3A8;

  /* Subtle Glass */
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-bg-strong: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.1);
  --glass-shadow: rgba(0, 0, 0, 0.08);

  /* Accent (minimal usage) */
  --accent: #1A1A1A;
  --accent-hover: #3A3A3A;

  /* Status */
  --success: #4CAF50;
  --warning: #FF9800;
  --error: #F44336;

  /* Spacing (responsive) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Border Radius (modern, smooth) */
  --radius-none: 0px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Text', 'Segoe UI', sans-serif;

  /* Blur */
  --blur-subtle: 16px;
  --blur-medium: 24px;
  --blur-strong: 32px;

  /* Transitions */
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
  /* Dark Mode Colors */
  --bg-primary: #0F0F0F;
  --bg-secondary: #1A1A1A;
  --bg-tertiary: #2A2A2A;

  --text-primary: #FFFFFF;
  --text-secondary: #B0B0B0;
  --text-tertiary: #707070;

  /* Dark Glass */
  --glass-bg: rgba(26, 26, 26, 0.6);
  --glass-bg-strong: rgba(26, 26, 26, 0.75);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: rgba(0, 0, 0, 0.3);

  /* Accent */
  --accent: #FFFFFF;
  --accent-hover: #E0E0E0;
  --accent-text: #1A1A1A;
}

/* System Preference Dark Mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* Dark Mode Colors */
    --bg-primary: #0F0F0F;
    --bg-secondary: #1A1A1A;
    --bg-tertiary: #2A2A2A;

    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --text-tertiary: #707070;

    /* Dark Glass */
    --glass-bg: rgba(26, 26, 26, 0.6);
    --glass-bg-strong: rgba(26, 26, 26, 0.75);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.3);

    /* Accent */
    --accent: #FFFFFF;
    --accent-hover: #E0E0E0;
    --accent-text: #1A1A1A;
  }
}

/* Additional Dark Mode Specificity Overrides */
[data-theme="dark"] .modal-close,
[data-theme="dark"] .input,
[data-theme="dark"] .textarea,
[data-theme="dark"] .task-name,
[data-theme="dark"] .stat-value,
[data-theme="dark"] .logo {
  color: var(--text-primary) !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .modal-close,
  :root:not([data-theme="light"]) .input,
  :root:not([data-theme="light"]) .textarea,
  :root:not([data-theme="light"]) .task-name,
  :root:not([data-theme="light"]) .stat-value,
  :root:not([data-theme="light"]) .logo {
    color: var(--text-primary) !important;
  }
}

/* Ensure placeholders are visible in dark mode */
[data-theme="dark"] .input::placeholder,
[data-theme="dark"] .textarea::placeholder {
  color: var(--text-tertiary) !important;
  opacity: 1;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .input::placeholder,
  :root:not([data-theme="light"]) .textarea::placeholder {
    color: var(--text-tertiary) !important;
    opacity: 1;
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p { margin: 0; }

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

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

/* ============================================
   Glass Components (Enhanced)
   ============================================ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 2px 8px var(--glass-shadow);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--blur-strong)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-strong)) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px var(--glass-shadow);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl);
  width: 100%;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================
   Top Bar (Minimal)
   ============================================ */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-strong)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-strong)) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  z-index: 100;
  box-shadow: 0 2px 12px var(--glass-shadow);
}

.logo {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.top-bar-actions {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

/* ============================================
   Floating Action Button
   ============================================ */
.fab {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 56px;
  height: 56px;
  background: var(--accent);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  cursor: pointer;
  border: none;
  z-index: 99;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15), 0 1px 4px rgba(0, 0, 0, 0.1);
}

/* Dark mode: FAB needs dark text */
[data-theme="dark"] .fab {
  color: var(--accent-text, #1A1A1A) !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .fab {
    color: var(--accent-text, #1A1A1A) !important;
  }
}

.fab:hover {
  background: var(--accent-hover);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2), 0 2px 8px rgba(0, 0, 0, 0.12);
}

.fab:active {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Modal System
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-md);
}

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

.modal {
  width: 100%;
  max-width: 700px;
  max-height: 90vh;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

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

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-lg);
  background: transparent;
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
}

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

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

.modal-footer {
  padding: var(--space-lg);
  border-top: 1px solid var(--glass-border);
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}

/* ============================================
   Chat Interface (Proper Message Bubbles)
   ============================================ */
.chat-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-height: 400px;
  max-height: 500px;
  overflow-y: auto;
  padding: var(--space-sm);
}

.message {
  display: flex;
  gap: var(--space-sm);
  max-width: 80%;
}

.message.user {
  margin-left: auto;
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-tertiary);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.message.user .message-avatar {
  background: var(--accent);
  color: white;
}

/* Dark mode: user avatar needs dark text */
[data-theme="dark"] .message.user .message-avatar {
  color: var(--accent-text, #1A1A1A) !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .message.user .message-avatar {
    color: var(--accent-text, #1A1A1A) !important;
  }
}

.message-bubble {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.message-bubble strong {
  font-weight: 600;
}

.message-bubble em {
  font-style: italic;
}

.message-bubble a {
  color: inherit;
  text-decoration: underline;
  transition: opacity var(--transition);
}

.message-bubble a:hover {
  opacity: 0.7;
}

.message-bubble ol,
.message-bubble ul {
  margin: var(--space-sm) 0;
  padding-left: var(--space-lg);
}

.message-bubble li {
  margin: var(--space-xs) 0;
}

.message-bubble code {
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* Approval UI */
.approval-ui {
  width: 100%;
  max-width: 80%;
  margin: var(--space-md) 0;
}

.approval-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: 0 2px 8px var(--glass-shadow);
}

.approval-header {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--glass-border);
}

.approval-details {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.approval-field {
  margin-bottom: var(--space-md);
}

.approval-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.approval-input,
.approval-textarea {
  width: 100%;
  font-size: 0.9375rem;
}

.approval-textarea {
  resize: vertical;
  min-height: 60px;
}

.approval-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--glass-border);
}

.approval-actions .btn {
  min-width: 100px;
}

.subtasks-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.subtask-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-left: var(--space-md);
  border-left: 2px solid var(--glass-border);
}

.subtask-input {
  flex: 1;
}

.message.user .message-bubble {
  background: var(--accent);
  color: white;
}

/* Dark mode: user message bubble needs dark text */
[data-theme="dark"] .message.user .message-bubble {
  color: var(--accent-text, #1A1A1A) !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .message.user .message-bubble {
    color: var(--accent-text, #1A1A1A) !important;
  }
}

.message.assistant .message-bubble {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-subtle));
  -webkit-backdrop-filter: blur(var(--blur-subtle));
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--space-md);
  max-width: 60px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-tertiary);
  animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; }
  30% { opacity: 1; }
}

/* ============================================
   Input Areas
   ============================================ */
.input-container {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-end;
  margin-top: var(--space-md);
}

.input,
.textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  resize: none;
}

.input:focus,
.textarea:focus {
  outline: none;
  border-color: var(--text-secondary);
}

.textarea {
  min-height: 48px;
  max-height: 200px;
  line-height: 1.5;
}

/* ============================================
   Buttons (Minimal)
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 10px 20px;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

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

/* Dark mode: primary buttons need dark text */
[data-theme="dark"] .btn-primary {
  color: var(--accent-text, #1A1A1A) !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn-primary {
    color: var(--accent-text, #1A1A1A) !important;
  }
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.btn-secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-subtle)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-subtle)) saturate(180%);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--glass-bg-strong);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

/* ============================================
   Dashboard
   ============================================ */
.dashboard {
  padding: calc(56px + var(--space-xl)) var(--space-xl) var(--space-xl);
  min-height: 100vh;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition);
  box-shadow: 0 2px 8px var(--glass-shadow);
}

.stat-card:hover {
  background: var(--glass-bg-strong);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--glass-shadow);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

.stat-value {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stat-value.success { color: var(--success); }
.stat-value.error { color: var(--error); }
.stat-value.warning { color: var(--warning); }

/* ============================================
   Tasks
   ============================================ */
.tasks-container {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.tasks-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.tasks-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.filters {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.filter-chip {
  padding: var(--space-xs) var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-chip:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}

.filter-chip.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* Dark mode: active filter chips need dark text */
[data-theme="dark"] .filter-chip.active {
  color: var(--accent-text, #1A1A1A) !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .filter-chip.active {
    color: var(--accent-text, #1A1A1A) !important;
  }
}

.tasks-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.task-item {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-medium)) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: all var(--transition);
  cursor: pointer;
  box-shadow: 0 1px 4px var(--glass-shadow);
}

.task-item:hover {
  background: var(--glass-bg-strong);
  transform: translateX(4px);
  box-shadow: 0 4px 16px var(--glass-shadow);
}

.task-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.task-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.task-badge {
  padding: 2px var(--space-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.task-badge.high { background: rgba(244, 67, 54, 0.1); color: var(--error); border-color: var(--error); }
.task-badge.medium { background: rgba(255, 152, 0, 0.1); color: var(--warning); border-color: var(--warning); }
.task-badge.low { background: rgba(76, 175, 80, 0.1); color: var(--success); border-color: var(--success); }
.task-badge.overdue { background: rgba(244, 67, 54, 0.1); color: var(--error); border-color: var(--error); }
.task-badge.today { background: rgba(255, 152, 0, 0.1); color: var(--warning); border-color: var(--warning); }

/* ============================================
   Login Page
   ============================================ */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-xl);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: var(--space-2xl);
  background: var(--glass-strong);
  backdrop-filter: blur(var(--blur-medium));
  -webkit-backdrop-filter: blur(var(--blur-medium));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-none);
  text-align: center;
}

.auth-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.auth-subtitle {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

.auth-footer {
  margin-top: var(--space-lg);
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
  position: fixed;
  top: calc(56px + var(--space-md));
  right: var(--space-xl);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  min-width: 300px;
  padding: var(--space-md);
  background: var(--glass-strong);
  backdrop-filter: blur(var(--blur-medium));
  -webkit-backdrop-filter: blur(var(--blur-medium));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-none);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  animation: slideIn 0.3s ease;
}

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

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--error); }
.toast-warning { border-left: 3px solid var(--warning); }

.toast-message {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-primary);
}

/* ============================================
   Loading
   ============================================ */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  z-index: 999;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--glass-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================
   Empty States
   ============================================ */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
}

.empty-state h3 {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

/* ============================================
   Mobile Navigation
   ============================================ */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-strong)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-strong)) saturate(180%);
  border-top: 1px solid var(--glass-border);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  padding-bottom: calc(var(--space-sm) + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.06);
}

.mobile-nav-items {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 100%;
  max-width: 500px;
  margin: 0 auto;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  color: var(--text-tertiary);
  transition: all var(--transition);
  font-size: 0.6875rem;
  font-weight: 500;
  flex: 1;
  max-width: 80px;
  border-radius: var(--radius-lg);
  min-height: 48px;
  background: transparent;
  border: none;
  font-family: var(--font-sans);
}

.mobile-nav-item svg {
  transition: all var(--transition);
  stroke-width: 2;
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
  color: var(--text-primary);
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--blur-subtle)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-subtle)) saturate(180%);
}

.mobile-nav-item.active svg {
  stroke-width: 2.5;
  transform: scale(1.1);
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
  display: none !important;
}

/* ============================================
   Mobile Responsive
   ============================================ */
@media (max-width: 768px) {
  :root {
    --space-xl: 20px;
    --space-2xl: 32px;
  }

  .top-bar {
    padding: 0 var(--space-md);
    height: 56px;
  }

  .logo {
    font-size: 1rem;
  }

  .dashboard {
    padding: calc(56px + var(--space-lg)) var(--space-md) calc(70px + var(--space-lg));
  }

  .container {
    padding: var(--space-md);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .stat-card {
    padding: var(--space-md);
  }

  .stat-value {
    font-size: 1.75rem;
  }

  .tasks-container {
    padding: var(--space-md);
  }

  .tasks-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .tasks-title {
    font-size: 1.25rem;
  }

  .fab {
    bottom: calc(70px + var(--space-md));
    right: var(--space-md);
    width: 52px;
    height: 52px;
    font-size: 1.375rem;
  }

  .mobile-nav {
    display: block;
  }

  .modal {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-lg);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--space-md);
  }

  .chat-container {
    max-height: 400px;
  }

  .toast-container {
    right: var(--space-md);
    left: var(--space-md);
    top: calc(56px + var(--space-sm));
  }

  .toast {
    min-width: auto;
  }

  .message {
    max-width: 90%;
  }

  .filters {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-xs);
  }

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

  .task-item {
    padding: var(--space-sm) var(--space-md);
  }

  .task-name {
    font-size: 0.875rem;
  }

  .task-meta {
    font-size: 0.75rem;
  }

  .auth-card {
    padding: var(--space-xl);
  }

  .auth-title {
    font-size: 1.75rem;
  }
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 4px;
}

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