/* KeyTasks - Modern Minimalist Design System */

/* CSS Variables for Design System */
:root {
  /* Colors - Grayscale Palette */
  --color-primary: var(--color-gray-700);
  --color-primary-hover: var(--color-gray-800);
  --color-primary-light: var(--color-gray-100);
  --color-success: var(--color-gray-600);
  --color-success-hover: var(--color-gray-700);
  --color-error: var(--color-gray-800);
  --color-error-hover: var(--color-gray-900);
  --color-warning: var(--color-gray-600);
  --color-warning-hover: var(--color-gray-700);
  
  /* Neutral colors */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  
  /* Action colors */
  --color-golden-yellow: #ffc62b;
  --color-golden-yellow-hover: #e7ab08;
  --color-deep-blue: #1e40af;
  --color-deep-blue-highlight: #1e40af17;
  --color-deep-blue-hover: #1e3a8a;
  --color-faded-pink-red: #f87171;
  --color-faded-pink-red-highlight: #f8717117;
  --color-faded-pink-red-hover: #ef4444;
  
  /* Text */
  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-500);
  
  /* Background */
  --bg-primary: #ffffff;
  --bg-secondary: var(--color-gray-50);
  --bg-muted: var(--color-gray-100);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  /* Spacing */
  --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;
  
  /* Border radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-loose: 1.75;

  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Dark mode variables */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: var(--color-gray-100);
    --text-secondary: var(--color-gray-300);
    --text-muted: var(--color-gray-400);
    --bg-primary: var(--color-gray-900);
    --bg-secondary: var(--color-gray-800);
    --bg-muted: var(--color-gray-700);
    --color-deep-blue-highlight: #1e40af33;
    --color-faded-pink-red-highlight: #f8717133;
  }
}

/* Base styles */
* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: var(--line-height-normal);
  color: var(--text-primary);
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-secondary);
  min-height: 100vh;
}

.lowercase {
  text-transform: lowercase;
}

/* Layout components */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-4);
}

.app-header {
  padding: var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-leading {
  flex: 0;
  display: flex;
  justify-content: flex-start;
}

.header-title {
  flex: 1;
  display: flex;
  justify-content: center;
  font-family: var(--font-mono);
}

.header-title .heading-1 {
  margin: 0;
  text-align: center;
}

.user-menu {
  flex: 0;
  display: flex;
  justify-content: flex-end;
}

.app-main {
  flex: 1;
  padding: var(--space-8) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.app-footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-gray-200);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* Focus area - main content container */
.focus-area {
  width: 100%;
  max-width: 900px;
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
  margin: 0 auto;
}

/* Typography */
.heading-1 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin: 0 0 var(--space-6) 0;
  text-align: center;
  color: var(--text-primary);
}

.heading-2 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  line-height: var(--line-height-tight);
  margin: 0 0 var(--space-4) 0;
  color: var(--text-primary);
}

.heading-3 {
  font-size: var(--font-size-xl);
  font-weight: 500;
  line-height: var(--line-height-tight);
  margin: 0 0 var(--space-3) 0;
  color: var(--text-primary);
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  min-height: 44px; /* Touch-friendly */
  gap: var(--space-2);
}

.btn-primary {
  background: var(--color-deep-blue);
  color: var(--color-gray-100);
}

.btn-primary:hover {
  background: var(--color-deep-blue-hover);
}

.btn-secondary {
  background: var(--bg-muted);
  color: var(--text-primary);
  border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover {
  background: var(--color-gray-200);
}

@media (prefers-color-scheme: dark) {
  .btn-secondary:hover {
    background: var(--color-gray-600);
  }
}

.btn-success {
  background: var(--color-deep-blue);
  color: var(--color-gray-100);
}

.btn-success:hover {
  background: var(--color-deep-blue-hover);
}

.btn-error {
  background: var(--color-gray-800);
  color: var(--color-gray-100);
}

.btn-error:hover {
  background: var(--color-gray-900);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

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

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  min-height: 32px;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

/* Forms */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
  color: var(--text-primary);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
  min-height: 44px;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-gray-700);
  box-shadow: 0 0 0 3px var(--color-gray-200);
}

@media (prefers-color-scheme: dark) {
  .form-input:focus, .form-textarea:focus, .form-select:focus {
    border-color: var(--color-gray-300);
    box-shadow: 0 0 0 3px var(--color-gray-700);
  }
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* Task-specific components */
.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Suggestions Panel Styling */
.suggestions-panel {
  background: var(--bg-muted);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  position: relative;
}

.suggestions-panel::before {
  content: "Suggestions";
  position: absolute;
  top: calc(var(--space-3) * -1);
  left: var(--space-4);
  background: var(--bg-primary);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.suggestions-list {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-top: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.suggestions-list .task-item {
  background: var(--bg-secondary);
  border: 1px solid var(--color-gray-200);
  position: relative;
}

.suggestions-list .task-item::before {
  content: "S";
  position: absolute;
  left: calc(var(--space-4) * -1);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-gray-600);
  color: var(--color-gray-100);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border: 1px solid var(--color-gray-400);
}

.task-item {
  display: flex;
  align-items: stretch;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  margin: calc(-1 * var(--space-2)) var(--space-2) var(--space-3) var(--space-2);
  border-radius: var(--radius-lg);
}

.task-item:hover {
  background-color: var(--color-deep-blue-highlight);
}

.task-item:hover > .task-main-content {
  border-color: var(--color-deep-blue);
}

.task-item.completed:hover {
  background-color: var(--color-faded-pink-red-highlight);
}

.task-item.completed:hover > .task-main-content {
  border-color: var(--color-faded-pink-red);
}

.task-item.completed .task-main-content {
  border-color: var(--color-gray-100);
}

.task-item.completed .task-content {
  text-decoration: line-through;
  color: var(--text-muted);
  opacity: 0.7;
}

.task-main-content {
  flex: 1;
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding-left: var(--space-4);
  border: 2px solid var(--color-deep-blue-highlight);
  transition: all 0.2s ease-in-out;
  min-height: 60px;
  display: flex;
  align-items: center;
}

.task-content {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  resize: none;
  outline: none;
  min-height: 60px;
  border-radius: var(--radius-lg);
  transition: background-color 0.2s ease-in-out;
  height: 100%;
  vertical-align: middle;
  display: inline-block;
  height: 100%;
  width: 100%;
  padding: var(--space-4) 0;
  box-sizing: border-box;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  .task-content:focus {
    background: var(--color-gray-800);
  }
}

.task-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.task-actions .btn {
  height: 60px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-xl);
  border: none;
  padding: var(--space-3);
  background: transparent;
  color: var(--color-gray-600);
  transition: all 0.2s ease-in-out;
  text-decoration: none;
}

.task-actions .btn-success {
  color: var(--color-deep-blue);
}

.task-actions .btn-secondary {
  color: var(--color-gray-600);
}

.task-actions .btn-secondary.undo-btn {
  color: var(--color-faded-pink-red);
}

.task-actions .btn-secondary.undo-btn:hover {
  color: var(--color-faded-pink-red-hover);
}

.task-item:hover .task-actions .btn-success {
  color: var(--color-deep-blue-hover);
}

.task-item:hover .task-actions .btn-secondary {
  color: var(--color-gray-800);
}

@media (prefers-color-scheme: dark) {
  .task-item:hover .task-actions .btn-secondary {
    color: var(--color-gray-200);
  }
}

.task-item:hover .task-actions .btn-secondary.undo-btn {
  color: var(--color-faded-pink-red-hover);
}

.task-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-gray-700);
  color: var(--color-gray-100);
  border-radius: 50%;
  font-size: var(--font-size-sm);
  font-weight: 600;
  flex-shrink: 0;
  margin-right: var(--space-3);
}

/* Navigation */
.nav-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-1);
  background: var(--bg-muted);
  border-radius: var(--radius-xl);
}

.nav-tab {
  flex: 1;
  padding: var(--space-2) var(--space-1);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-decoration: none;
  text-align: center;
}

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

.nav-tab.active {
  color: var(--color-gray-900);
  background: var(--color-golden-yellow);
  box-shadow: var(--shadow-sm);
}

/* Brand styles */
.focus-brand {
  font-family: 'Dancing Script', cursive !important;
  font-size: var(--font-size-3xl) !important;
  font-weight: 400 !important;
  line-height: 1 !important;
  display: flex !important;
  align-items: center !important;
}

/* Utilities */
.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;
}

.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

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

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

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

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

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.w-full { width: 100%; }

/* User Account Dropdown */
.user-menu {
  position: relative;
}

.user-menu-button {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  font-size: var(--font-size-sm);
}

.user-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-1);
  background: var(--bg-primary);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  z-index: 50;
}

.user-menu-item {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: none;
  background: none;
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background-color 0.2s ease-in-out;
}

.user-menu-item:hover {
  background: var(--bg-muted);
}

.user-menu-item:first-child {
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

.user-menu-item:last-child {
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

/* Mobile Navigation Styles */
.mobile-menu-button {
  display: none;
  flex: 0;
}

.mobile-nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger-line + .hamburger-line {
  margin-top: 4px;
}

.mobile-nav-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(3px, 3px);
}

.mobile-nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(3px, -3px);
}

.mobile-nav-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
}

.mobile-nav-content {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav-item {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: none;
  background: none;
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-base);
  cursor: pointer;
  border-radius: var(--radius-lg);
  transition: background-color 0.2s ease-in-out;
  text-align: left;
}

.mobile-nav-item:hover {
  background: var(--bg-muted);
}

.mobile-nav-item.focus-brand {
  font-family: 'Dancing Script', cursive !important;
  font-size: var(--font-size-2xl) !important;
  font-weight: 400 !important;
  text-align: center;
  margin-bottom: var(--space-2);
}

.mobile-nav-divider {
  height: 1px;
  background: var(--color-gray-200);
  margin: var(--space-2) 0;
}

.mobile-nav-user {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  padding: var(--space-2) var(--space-4);
  font-weight: 500;
}

.desktop-nav {
  display: flex;
}

/* Responsive design */
@media (max-width: 768px) {
  .app-container {
    padding: 0;
  }
  
  .app-header {
    position: relative;
    padding: var(--space-4);
  }
  
  .mobile-menu-button {
    display: flex;
  }
  
  .desktop-nav {
    display: none !important;
  }
  
  .header-title {
    flex: 1;
    display: flex;
    justify-content: center;
    font-family: var(--font-mono);
  }
  
  .focus-area {
    max-width: none;
    margin: 0;
    padding: var(--space-4);
    border-radius: 0;
    box-shadow: none;
  }
  
  .heading-1 {
    font-size: var(--font-size-2xl);
  }
  
  .heading-2 {
    font-size: var(--font-size-xl);
  }
  
  /* Hide mobile nav menu on desktop */
  .mobile-nav-menu {
    display: none;
  }
}

/* Show mobile nav menu only on mobile when not hidden */
@media (max-width: 768px) {
  .mobile-nav-menu:not(.hidden) {
    display: block;
  }
}

/* Loading and transitions removed for speed */

/* Focus states for accessibility */
.btn:focus-visible,
.nav-tab:focus-visible,
.user-menu-button:focus-visible {
  outline: 2px solid var(--color-gray-700);
  outline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  .btn:focus-visible,
  .nav-tab:focus-visible,
  .user-menu-button:focus-visible {
    outline: 2px solid var(--color-gray-300);
  }
}

/* Task item hover effects */
.single-task-container {
  transition: background-color 0.2s ease;
  border-radius: var(--radius-lg);
  margin: calc(-1 * var(--space-2));
}

.single-task-container:hover {
  background-color: var(--color-gray-100);
}

@media (prefers-color-scheme: dark) {
  .single-task-container:hover {
    background-color: var(--color-gray-800);
  }
}

/* Print styles */
@media print {
  .btn, .user-menu, .nav-tabs {
    display: none !important;
  }
  
  .focus-area {
    box-shadow: none;
    border: 1px solid var(--color-gray-300);
  }
}