:root {
    --white:     #ffffff;
    --off:       #f5f5f5;
    --g100:      #e8e8e8;
    --g300:      #c0c0c0;
    --g500:      #888888;
    --g700:      #444444;
    --black:     #111111;
    --border:    #e2e2e2;
    --radius:    8px;
    --radius-sm: 5px;
    --sans:      'Geist', system-ui, sans-serif;
    --mono:      'Geist Mono', 'Courier New', monospace;
    --t:         0.15s ease;
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { font-size: 16px; }

  body {
    font-family: var(--sans);
    background: var(--white);
    color: var(--black);
    min-height: 100vh;
    padding: 3rem 1rem 5rem;
    line-height: 1.6;
  }

  .wrapper { max-width: 600px; margin: 0 auto; }

  /* Header */
  .site-header { text-align: center; margin-bottom: 3rem; }
  .site-header .eyebrow {
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--g500);
    font-weight: 400;
    margin-bottom: 0.75rem;
  }
  .site-header h1 {
    font-family: var(--sans);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--black);
    margin-bottom: 0.5rem;
  }
  .site-header h1 em { font-style: normal; font-weight: 500; }
  .site-header .subtitle { font-size: 13px; color: var(--g500); font-weight: 300; }

  /* Tabs */
  .tabs {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 2rem;
  }
  .tab {
    flex: 1;
    padding: 10px 8px;
    border: none;
    background: var(--white);
    cursor: pointer;
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 400;
    color: var(--g500);
    transition: all var(--t);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-right: 1px solid var(--border);
    letter-spacing: 0.01em;
  }
  .tab:last-child { border-right: none; }
  .tab svg { width: 14px; height: 14px; stroke-width: 1.6; flex-shrink: 0; }
  .tab:hover { background: var(--off); color: var(--black); }
  .tab.active { background: var(--black); color: var(--white); font-weight: 500; }

  /* Sections */
  .section { display: none; animation: fadeUp 0.2s ease; }
  .section.active { display: block; }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(5px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* Stats */
  .stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 1.25rem;
  }
  .stat { background: var(--white); padding: 16px 12px; text-align: center; }
  .stat-num {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: -0.04em;
    color: var(--black);
    line-height: 1;
    margin-bottom: 4px;
    font-family: var(--mono);
  }
  .stat-label {
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--g500);
    font-weight: 400;
  }

  /* Progress */
  .progress-wrap {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .progress-bar {
    flex: 1;
    height: 1px;
    background: var(--border);
    position: relative;
    overflow: hidden;
  }
  .progress-fill {
    position: absolute;
    inset: 0 auto 0 0;
    background: var(--black);
    transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
  }
  .progress-pct { font-family: var(--mono); font-size: 11px; color: var(--g500); min-width: 36px; text-align: right; }

  /* Joke card */
  .joke-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
  }
  .joke-card::before {
    content: '\201C';
    font-family: var(--mono);
    font-size: 6rem;
    color: var(--g100);
    position: absolute;
    top: -1rem;
    left: 1.25rem;
    line-height: 1;
    pointer-events: none;
    user-select: none;
  }
  .joke-text {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 300;
    line-height: 1.6;
    color: var(--black);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
  }
  .joke-cat {
    display: inline-block;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--g500);
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 2px;
    margin-bottom: 1.5rem;
  }
  .joke-cat:empty { display: none; }

  /* Buttons */
  .btn-row { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.01em;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--black);
    transition: all var(--t);
  }
  .btn svg { width: 14px; height: 14px; stroke-width: 1.6; flex-shrink: 0; }
  .btn:hover { background: var(--off); border-color: var(--g300); }
  .btn:active { transform: scale(0.98); }
  .btn-accent { background: var(--black); color: var(--white); border-color: var(--black); }
  .btn-accent:hover { background: var(--g700); border-color: var(--g700); }
  .btn-ghost { border-color: transparent; background: transparent; color: var(--g500); }
  .btn-ghost:hover { color: var(--black); background: var(--off); border-color: var(--border); }
  .btn-danger { border-color: var(--border); color: var(--g700); background: var(--off); }
  .btn-danger:hover { background: var(--g100); border-color: var(--g300); }

  /* Form */
  .form-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
  .form-group { margin-bottom: 1.25rem; }
  .form-group:last-child { margin-bottom: 0; }
  label {
    display: block;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 400;
    color: var(--g500);
    margin-bottom: 8px;
  }
  textarea, input[type="text"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--off);
    color: var(--black);
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 300;
    line-height: 1.5;
    resize: vertical;
    transition: border-color var(--t), background var(--t);
    outline: none;
  }
  textarea:focus, input:focus {
    border-color: var(--black);
    background: var(--white);
    box-shadow: 0 0 0 3px var(--g100);
  }
  textarea { min-height: 110px; }

  /* List */
  .list-controls { display: flex; gap: 6px; margin-bottom: 1rem; flex-wrap: wrap; align-items: center; }
  .filter-btn {
    padding: 5px 14px;
    border-radius: 2px;
    font-size: 11px;
    font-weight: 400;
    font-family: var(--mono);
    letter-spacing: 0.06em;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--g500);
    transition: all var(--t);
    text-transform: uppercase;
  }
  .filter-btn:hover { border-color: var(--g300); color: var(--black); }
  .filter-btn.active { background: var(--black); color: var(--white); border-color: var(--black); }

  .joke-list { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
  .list-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    transition: background var(--t);
  }
  .list-item:last-child { border-bottom: none; }
  .list-item:hover { background: var(--off); }
  .list-item-body { flex: 1; min-width: 0; }
  .list-item-text { font-size: 14px; font-weight: 300; color: var(--black); line-height: 1.5; margin-top: 6px; }
  .badge {
    display: inline-block;
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 400;
    padding: 2px 8px;
    border-radius: 2px;
  }
  .badge-new { background: var(--black); color: var(--white); }
  .badge-seen { background: var(--g100); color: var(--g500); }
  .badge-cat { background: var(--off); color: var(--g700); border: 1px solid var(--border); margin-left: 4px; }
  .item-actions { display: flex; gap: 4px; flex-shrink: 0; }
  .icon-btn {
    width: 30px; height: 30px;
    display: flex; align-items: center; justify-content: center;
    border: none; background: none; cursor: pointer;
    border-radius: var(--radius-sm);
    color: var(--g300);
    transition: all var(--t);
  }
  .icon-btn svg { width: 15px; height: 15px; stroke-width: 1.6; }
  .icon-btn:hover { background: var(--g100); color: var(--black); }
  .icon-btn.danger:hover { background: var(--g100); color: var(--g700); }

  .empty-state { padding: 3rem 1rem; text-align: center; color: var(--g300); font-size: 13px; }
  .empty-state .empty-icon {
    font-family: var(--mono);
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--g100);
    display: block;
    margin-bottom: 0.5rem;
  }

  /* Datos */
  .data-section {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 1rem;
  }
  .data-block { padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border); }
  .data-block:last-child { border-bottom: none; }
  .data-block-header { display: flex; align-items: center; gap: 12px; margin-bottom: 1rem; }
  .data-icon {
    width: 32px; height: 32px;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--border);
    background: var(--off);
    color: var(--g700);
  }
  .data-icon svg { width: 15px; height: 15px; stroke-width: 1.6; }
  .data-icon.export { }
  .data-icon.import { }
  .data-icon.danger { }
  .data-title { font-weight: 500; font-size: 13px; letter-spacing: -0.01em; }
  .data-desc { font-size: 11px; color: var(--g500); margin-top: 2px; font-weight: 300; }

  .code-box {
    background: var(--off);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--g500);
    max-height: 90px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.6;
    margin-bottom: 10px;
  }
  .import-area { font-family: var(--mono); font-size: 11px; min-height: 90px; }

  .info-box {
    background: var(--off);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    font-size: 12px;
    color: var(--g500);
    line-height: 1.6;
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-weight: 300;
  }
  .info-box svg { width: 14px; height: 14px; stroke-width: 1.6; flex-shrink: 0; margin-top: 2px; color: var(--g300); }

  /* Toast */
  #toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--black);
    color: var(--white);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    padding: 9px 18px;
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
    white-space: nowrap;
    z-index: 999;
  }
  #toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

  .divider { height: 1px; background: var(--border); margin: 1.25rem 0; }
  .row { display: flex; gap: 8px; align-items: center; }
  .row-between { display: flex; gap: 8px; align-items: center; justify-content: space-between; }