@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Manrope:wght@500;600;700&display=swap');

@tailwind base;
@tailwind components;
@tailwind utilities;

@layer base {
  :root {
    --background: 220 33% 98%;
    --foreground: 222 47% 11%;
    --card: 0 0% 100%;
    --card-foreground: 222 47% 11%;
    --popover: 0 0% 100%;
    --popover-foreground: 222 47% 11%;
    --primary: 214 89% 52%;
    --primary-foreground: 0 0% 100%;
    --secondary: 173 80% 40%;
    --secondary-foreground: 0 0% 100%;
    --muted: 220 16% 96%;
    --muted-foreground: 215 16% 47%;
    --accent: 188 92% 42%;
    --accent-foreground: 0 0% 100%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 0 0% 100%;
    --border: 215 20% 90%;
    --input: 215 20% 90%;
    --ring: 214 89% 52%;
    --radius: 0.75rem;
  }

  .dark {
    --background: 215 26% 7%;
    --foreground: 0 0% 98%;
    --card: 215 21% 11%;
    --card-foreground: 0 0% 98%;
    --popover: 215 21% 11%;
    --popover-foreground: 0 0% 98%;
    --primary: 213 93% 60%;
    --primary-foreground: 0 0% 100%;
    --secondary: 173 70% 42%;
    --secondary-foreground: 0 0% 100%;
    --muted: 215 15% 15%;
    --muted-foreground: 215 10% 58%;
    --accent: 197 100% 68%;
    --accent-foreground: 215 26% 7%;
    --destructive: 0 70% 52%;
    --destructive-foreground: 0 0% 100%;
    --border: 215 12% 21%;
    --input: 215 12% 21%;
    --ring: 213 93% 60%;
  }
}

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

  :root {
    /* Modern SaaS Design Tokens */
    --surface: 0 0% 100%;
    --surface-muted: 220 16% 96%;
    --text-primary: 222 47% 11%;
    --text-secondary: 215 25% 27%;
    --text-muted: 215 16% 47%;
    --brand: 214 89% 52%;
    --brand-dark: 221 83% 45%;
    --brand-teal: 173 80% 40%;
    --brand-teal-dark: 173 80% 32%;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.10);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.14);
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.25);
    --gradient-hero: linear-gradient(120deg, #eef6ff 0%, #f5f7fb 55%, #ffffff 100%);
    --gradient-accent: linear-gradient(120deg, #2563eb 0%, #14b8a6 100%);

    /* Compatibility aliases (legacy pixel tokens mapped to modern palette) */
    --pixel-purple-deep: #1E40AF;
    --pixel-purple-bright: #2563EB;
    --pixel-pink-vibrant: #38BDF8;
    --pixel-cyan-bright: #14B8A6;
    --pixel-orange-warm: #F59E0B;
    --pixel-yellow-gold: #FBBF24;
    --pixel-green-lime: #22C55E;
    --pixel-green-forest: #16A34A;

    --pixel-bg-dark: #0F172A;
    --pixel-bg-medium: #1E293B;
    --pixel-bg-light: #F5F7FB;
    --pixel-panel: #FFFFFF;
    --pixel-white: #FFFFFF;

    --pixel-shadow-dark: rgba(15, 23, 42, 0.2);
    --pixel-outline: #E2E8F0;

    --pixel-text-primary: #0F172A;
    --pixel-text-secondary: #334155;
    --pixel-text-muted: #64748B;
  }

  .dark {
    --surface: 215 21% 11%;
    --surface-muted: 215 15% 15%;
    --text-primary: 0 0% 98%;
    --text-secondary: 215 15% 82%;
    --text-muted: 215 10% 70%;
    --brand: 213 93% 60%;
    --brand-dark: 213 90% 52%;
    --brand-teal: 173 70% 42%;
    --brand-teal-dark: 173 68% 34%;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.45);
    --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.55);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.65);
    --focus-ring: 0 0 0 3px rgba(88, 166, 255, 0.35);
    --gradient-hero: linear-gradient(120deg, #0d1117 0%, #111827 55%, #161b22 100%);
    --gradient-accent: linear-gradient(120deg, #2f81f7 0%, #14b8a6 100%);

    --pixel-purple-deep: #0b1f4b;
    --pixel-purple-bright: #2f81f7;
    --pixel-pink-vibrant: #58a6ff;
    --pixel-cyan-bright: #14b8a6;
    --pixel-orange-warm: #f59e0b;
    --pixel-yellow-gold: #fbbf24;
    --pixel-green-lime: #22c55e;
    --pixel-green-forest: #16a34a;

    --pixel-bg-dark: #0d1117;
    --pixel-bg-medium: #161b22;
    --pixel-bg-light: #1f2937;
    --pixel-panel: #0f172a;
    --pixel-white: #e5e7eb;

    --pixel-shadow-dark: rgba(0, 0, 0, 0.5);
    --pixel-outline: #30363d;

    --pixel-text-primary: #e5e7eb;
    --pixel-text-secondary: #c9d1d9;
    --pixel-text-muted: #8b949e;
  }

  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
      'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--gradient-hero);
    color: hsl(var(--foreground));
  }

  h1, h2, h3, h4, h5 {
    font-family: 'Manrope', 'Inter', sans-serif;
  }

  #root {
    min-height: 100vh;
  }

  /* Pixel Art Utility Classes */
  .pixel-border {
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
  }

  .pixel-card {
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    background: hsl(var(--surface));
    transition: transform 0.12s ease, box-shadow 0.12s ease;
  }

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

  .pixel-button {
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.08s ease, box-shadow 0.08s ease;
    cursor: pointer;
  }

  .pixel-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .pixel-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
  }

  /* Focus states for accessibility */
  button:focus-visible,
  input:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
  }

  /* Reduced motion support */
  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }

  /* Pixel Icon Styles */
  .pixel-icon {
    display: inline-block;
    vertical-align: middle;
  }

  .pixel-icon-animated {
    animation: pixel-spin 1s steps(8) infinite;
  }

  /* Keyframe Animations */
  @keyframes pixel-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
  }

  @keyframes pixel-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-12px) rotate(2deg); }
    50% { transform: translateY(-8px) rotate(0deg); }
    75% { transform: translateY(-12px) rotate(-2deg); }
  }

  @keyframes pixel-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
  }

  @keyframes pixel-sparkle {
    0% { transform: scale(0) rotate(0deg); opacity: 1; }
    50% { transform: scale(1.5) rotate(180deg); opacity: 0.6; }
    100% { transform: scale(0) rotate(360deg); opacity: 0; }
  }

  @keyframes pixel-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
  }

  /* Home Page */
  .home-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }

  .home-page h1 {
    margin-bottom: 2rem;
  }

  .create-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .create-buttons button {
    padding: 0.75rem 1.5rem;
    background: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .create-buttons button:hover {
    background: hsl(var(--primary) / 0.9);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .create-buttons button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
  }

  .create-buttons button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
  }

  .document-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
  }

  .document-card {
    background: hsl(var(--surface));
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid hsl(var(--border));
    box-shadow: var(--shadow-md);
    transition: transform 0.12s ease, box-shadow 0.12s ease;
  }

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

  .doc-info h3 {
    margin-bottom: 0.5rem;
  }

  .doc-type {
    color: hsl(var(--text-secondary));
    text-transform: capitalize;
    margin-bottom: 0.5rem;
  }

  .doc-date {
    color: hsl(var(--text-muted));
    font-size: 0.875rem;
  }

  .doc-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
  }

  .doc-actions button {
    padding: 0.5rem 1rem;
    border: 1px solid hsl(var(--border));
    background: hsl(var(--surface));
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease, box-shadow 0.1s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .doc-actions button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .doc-actions button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
  }

  .doc-actions button:first-child {
    background: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border-color: hsl(var(--border));
  }

  .doc-actions button:first-child:hover {
    background: hsl(var(--primary));
  }

  /* Editor Page */
  .editor-page, .kanban-page {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: hsl(var(--background));
  }

  .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: hsl(var(--surface));
    border-bottom: 1px solid hsl(var(--border));
    box-shadow: var(--shadow-sm);
  }

  .page-header button {
    padding: 0.5rem 1rem;
    background: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
  }

  .page-header button:hover {
    background: hsl(var(--surface-muted));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .page-header button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
  }

  .sync-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: hsl(var(--text-secondary));
    font-size: 0.875rem;
  }

  .sync-dot {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    background: hsl(var(--surface-muted));
    border: 1px solid hsl(var(--border));
  }

  .sync-dot.synced {
    background: hsl(var(--secondary));
    border-color: hsl(var(--secondary));
    box-shadow: 0 0 0 2px rgba(20, 184, 166, 0.15);
  }

  .sync-dot.syncing {
    background: hsl(var(--primary));
    border-color: hsl(var(--primary));
    animation: pulse-dot 1.2s ease-in-out infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.2); opacity: 1; }
  }

  .view-only-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 999px;
    background: hsl(var(--surface));
    color: hsl(var(--text-secondary));
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid hsl(var(--border));
    box-shadow: var(--shadow-sm);
    line-height: 1;
  }

  .view-only-icon {
    width: 14px;
    height: 14px;
    color: hsl(var(--text-muted));
  }

  .shared-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: hsl(var(--text-secondary));
    background: hsl(var(--surface-muted));
    border: 1px solid hsl(var(--border));
    border-radius: 6px;
    box-shadow: 2px 2px 0 rgba(15, 23, 42, 0.08);
  }

  .page-content {
    display: flex;
    flex-direction: column; /* Mobile: stack vertically */
    flex: 1;
    overflow: hidden;
  }

  @media (min-width: 768px) {
    .page-content {
      flex-direction: row; /* Desktop: horizontal layout */
    }
  }

  .main-area {
    flex: 1;
    overflow: auto;
    padding: 0.5rem; /* Mobile: minimal padding */
  }

  @media (min-width: 640px) {
    .main-area {
      padding: 1rem;
    }
  }

  @media (min-width: 768px) {
    .main-area {
      padding: 2rem; /* Desktop: original padding */
    }
  }

  .sidebar {
    width: 100%; /* Mobile: full width */
    background: hsl(var(--surface));
    border-top: 1px solid hsl(var(--border)); /* Mobile: top border */
    border-left: none;
    padding: 1rem;
    max-height: 200px; /* Mobile: limit height */
    overflow-y: auto;
  }

  @media (min-width: 768px) {
    .sidebar {
      width: 250px; /* Desktop: fixed width */
      max-height: none;
      border-top: none;
      border-left: 1px solid hsl(var(--border));
    }
  }

  /* Editor */
  .editor-container {
    background: hsl(var(--surface));
    border-radius: var(--radius-lg);
    border: 1px solid hsl(var(--border));
    box-shadow: var(--shadow-md);
    overflow: hidden;
  }

  .toolbar {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem;
    background: hsl(var(--surface-muted));
    border-bottom: 1px solid hsl(var(--border));
    flex-wrap: wrap;
  }

  .toolbar button {
    padding: 0.5rem 0.75rem;
    background: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
  }

  .toolbar button:hover {
    background: hsl(var(--surface-muted));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .toolbar button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
  }

  .toolbar button.active {
    background: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border-color: hsl(var(--border));
    box-shadow: var(--shadow-sm);
  }

  .editor-content {
    padding: 0.5rem; /* Mobile: minimal padding */
    min-height: 500px;
  }

  @media (min-width: 640px) {
    .editor-content {
      padding: 1rem;
    }
  }

  @media (min-width: 768px) {
    .editor-content {
      padding: 2rem; /* Desktop: original padding */
    }
  }

  .ProseMirror {
    outline: none;
  }

  .ProseMirror h1 {
    font-size: 2rem;
    margin: 1rem 0;
  }

  .ProseMirror h2 {
    font-size: 1.5rem;
    margin: 1rem 0;
  }

  .ProseMirror p {
    margin: 0.5rem 0;
  }

  .ProseMirror ul, .ProseMirror ol {
    margin-left: 1.5rem;
  }

  /* Collaborative Cursors */
  .collaboration-cursor__caret {
    position: absolute;
    border-left: 3px solid;
    border-right: none;
    margin-left: -1px;
    margin-right: -1px;
    pointer-events: none;
    word-break: normal;
    box-shadow: 1px 0 0 currentColor;
  }

  .collaboration-cursor__label {
    position: absolute;
    top: -1.4em;
    left: -1px;
    font-size: 12px;
    font-style: normal;
    font-weight: 600;
    line-height: normal;
    user-select: none;
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.15);
    white-space: nowrap;
    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
  }

  /* Kanban Board */
  .kanban-board {
    display: flex;
    flex-direction: column; /* Mobile: stack vertically */
    gap: 1rem;
    overflow-x: visible;
    padding-bottom: 1rem;
  }

  @media (min-width: 640px) {
    .kanban-board {
      flex-direction: row; /* Tablet+: horizontal scrolling */
      overflow-x: auto;
    }
  }

  .kanban-column {
    background: hsl(var(--surface));
    border-radius: var(--radius-lg);
    border: 1px solid hsl(var(--border));
    padding: 1rem;
    width: 100%; /* Mobile: full width */
    min-width: unset;
    max-width: unset;
    box-shadow: var(--shadow-sm);
  }

  @media (min-width: 640px) {
    .kanban-column {
      width: auto;
      min-width: 280px; /* Tablet: smaller fixed width */
      max-width: 280px;
    }
  }

  @media (min-width: 1024px) {
    .kanban-column {
      min-width: 300px; /* Desktop: original width */
      max-width: 300px;
    }
  }

  .column-title {
    margin-bottom: 1rem;
    font-size: 1.125rem;
  }

  .column-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .kanban-card {
    background: hsl(var(--surface));
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid hsl(var(--border));
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
  }

  .kanban-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .kanban-card h4 {
    margin-bottom: 0.5rem;
  }

  .kanban-card p {
    color: hsl(var(--text-secondary));
    font-size: 0.875rem;
  }

  .add-task-btn {
    padding: 0.75rem;
    background: hsl(var(--surface));
    border: 1px dashed hsl(var(--border));
    border-radius: var(--radius-md);
    cursor: pointer;
    color: hsl(var(--text-secondary));
  }

  .add-task-btn:hover {
    border-color: hsl(var(--primary));
    color: hsl(var(--text-primary));
    background: hsl(var(--surface-muted));
  }

  .add-task-form input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    background: hsl(var(--surface));
  }

  .add-task-form input:focus {
    outline: none;
    border-color: hsl(var(--primary));
    box-shadow: var(--focus-ring);
  }

  .form-actions {
    display: flex;
    gap: 0.5rem;
  }

  .form-actions button {
    padding: 0.5rem 1rem;
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: hsl(var(--surface));
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
  }

  .form-actions button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }

  .form-actions button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
  }

  .form-actions button:first-child {
    background: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border-color: hsl(var(--border));
  }

  /* User List */
  .user-list h4 {
    margin-bottom: 1rem;
  }

  .users {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .user-color {
    width: 12px;
    height: 12px;
    border-radius: 999px;
    border: 1px solid hsl(var(--border));
  }

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

  .loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-size: 1.25rem;
    color: hsl(var(--text-secondary));
  }