:root {
    --bg: #0e0f14;
    --surface: #16181f;
    --surface2: #1e2029;
    --border: #2a2d3a;
    --accent: #e8ff47;
    --accent2: #47ffe0;
    --accent3: #ff6b6b;
    --text: #e8eaf0;
    --text-muted: #6b7080;
    --text-dim: #9199a8;
    --green: #4ade80;
    --orange: #fb923c;
    --blue: #60a5fa;
    --purple: #c084fc;
    --font-display: 'Syne', sans-serif;
    --font-mono: 'DM Mono', monospace;
    --radius: 12px;
    --radius-sm: 8px;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-display), sans-serif;
    min-height: 100vh;
    background-image:
      radial-gradient(ellipse 60% 40% at 10% 10%, rgba(232,255,71,0.05) 0%, transparent 60%),
      radial-gradient(ellipse 50% 40% at 90% 80%, rgba(71,255,224,0.04) 0%, transparent 60%);
  }

  .header {
    padding: 2.5rem 2rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    flex-wrap: wrap;
  }

  .header-badge {
    background: var(--accent);
    color: #0e0f14;
    font-family: var(--font-mono), monospace;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: inline-block;
  }

  h1 {
    font-size: clamp(1.6rem, 4vw, 2.8rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #fff;
  }

  h1 span { color: var(--accent); }

  .header-sub {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: var(--font-mono), monospace;
  }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 1.5rem;
    align-items: start;
  }

  @media (max-width: 900px) {
    .container { grid-template-columns: 1fr; }
    .header { padding: 1.5rem 1rem; }
    .container { padding: 1rem; }
  }

  /* PANEL */
  .panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
  }

  .panel-title {
    font-size: 0.65rem;
    font-family: var(--font-mono), monospace;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 1rem 1.25rem 0.75rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface2);
  }

  .panel-body { padding: 1.25rem; }

  /* TOGGLE */
  .mode-toggle {
    display: flex;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 3px;
    margin-bottom: 1.25rem;
  }

  .mode-btn {
    flex: 1;
    padding: 0.55rem 0.5rem;
    border: none;
    background: none;
    color: var(--text-muted);
    font-family: var(--font-mono), monospace;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    text-transform: uppercase;
  }

  .mode-btn.active {
    background: var(--accent);
    color: #0e0f14;
  }

  /* FIELD */
  .field { margin-bottom: 1rem; }

  .field label {
    display: block;
    font-size: 0.72rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    text-transform: uppercase;
    margin-bottom: 0.4rem;
  }

  .field-row {
    display: flex;
    align-items: center;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color 0.2s;
  }

  .field-row:focus-within { border-color: var(--accent); }

  .field-row input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    padding: 0.65rem 0.9rem;
    color: var(--text);
    font-family: var(--font-mono), monospace;
    font-size: 1rem;
    font-weight: 500;
  }

  .field-unit {
    padding: 0 0.9rem;
    color: var(--text-muted);
    font-family: var(--font-mono), monospace;
    font-size: 0.8rem;
    font-weight: 500;
    background: var(--surface2);
    border-left: 1px solid var(--border);
    height: 100%;
    display: flex;
    align-items: center;
    min-height: 2.6rem;
  }

  .field-hint {
    font-size: 0.68rem;
    font-family: var(--font-mono), monospace;
    color: var(--text-muted);
    margin-top: 0.35rem;
  }

  /* CHECKBOXES */
  .section-label {
    font-size: 0.65rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
  }

  .check-group { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.25rem; }

  .check-item {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    cursor: pointer;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface2);
    transition: all 0.2s;
  }

  .check-item:hover { border-color: var(--text-muted); }
  .check-item.checked { border-color: var(--accent); background: rgba(232,255,71,0.05); }

  .check-item input[type="checkbox"] { display: none; }

  .check-box {
    width: 16px;
    height: 16px;
    min-width: 16px;
    border: 1.5px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
    transition: all 0.2s;
  }

  .check-item.checked .check-box {
    background: var(--accent);
    border-color: var(--accent);
  }

  .check-box::after {
    content: '✓';
    font-size: 10px;
    color: #0e0f14;
    display: none;
    font-weight: 700;
  }

  .check-item.checked .check-box::after { display: block; }

  .check-text { flex: 1; }
  .check-name { display: block; font-size: 0.82rem; font-weight: 600; color: var(--text); line-height: 1.3; }
  .check-desc { display: block; font-size: 0.68rem; font-family: var(--font-mono), monospace; color: var(--text-muted); margin-top: 0.15rem; line-height: 1.4; }

  /* SUBFIELD for honorarium */
  .subfield {
    display: none;
    margin-top: 0.6rem;
    padding: 0.6rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
  }
  .subfield.visible { display: block; }
  .subfield label {
    font-size: 0.68rem;
    font-family: var(--font-mono), monospace;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.3rem;
    display: block;
  }
  .subfield input {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.4rem 0.7rem;
    color: var(--text);
    font-family: var(--font-mono), monospace;
    font-size: 0.85rem;
    width: 100px;
    outline: none;
  }
  .subfield input:focus { border-color: var(--accent); }

  /* Autor subfield layout helpers */
  .panel-mb { margin-bottom: 1rem; }
  .autor-subfield-row { display: flex; gap: 1rem; flex-wrap: wrap; }
  .autor-input-row { display: flex; align-items: center; gap: 0.4rem; }
  .autor-rate-btns { display: flex; gap: 0.3rem; }
  .autor-rate-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-family: var(--font-mono), monospace;
    font-size: 0.65rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
  }

  /* BUTTON */
  .calc-btn {
    width: 100%;
    padding: 0.85rem;
    background: var(--accent);
    color: #0e0f14;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-display), sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.15s;
    text-transform: uppercase;
    margin-top: 0.25rem;
  }

  .calc-btn:hover { background: #f4ff70; transform: translateY(-1px); box-shadow: 0 4px 20px rgba(232,255,71,0.25); }
  .calc-btn:active { transform: translateY(0); }

  /* RESULTS */
  .results-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: var(--text-muted);
    font-family: var(--font-mono), monospace;
    font-size: 0.8rem;
    text-align: center;
    flex-direction: column;
    gap: 1rem;
  }

  .placeholder-icon {
    font-size: 3rem;
    opacity: 0.3;
  }

  /* SUMMARY CARDS */
  .summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.25rem;
  }

  @media (max-width: 600px) { .summary-grid { grid-template-columns: 1fr 1fr; } }

  .summary-card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.1rem;
  }

  .summary-card.highlight { border-color: var(--accent); background: rgba(232,255,71,0.06); }
  .summary-card.highlight2 { border-color: var(--accent2); background: rgba(71,255,224,0.05); }
  .summary-card.highlight3 { border-color: var(--accent3); background: rgba(255,107,107,0.05); }
  .summary-card.highlight4 { border-color: var(--purple); background: rgba(192,132,252,0.05); }

  .card-label {
    font-size: 0.62rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.4rem;
  }

  .card-val {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
  }

  .card-val.accent { color: var(--accent); }
  .card-val.accent2 { color: var(--accent2); }
  .card-val.accent3 { color: var(--accent3); }
  .card-val.purple { color: var(--purple); }

  .card-sub {
    font-size: 0.68rem;
    font-family: var(--font-mono), monospace;
    color: var(--text-muted);
    margin-top: 0.3rem;
  }

  /* BREAKDOWNS */
  .breakdown-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
  }

  @media (max-width: 700px) { .breakdown-grid { grid-template-columns: 1fr; } }

  .breakdown-section {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
  }

  .breakdown-header {
    padding: 0.6rem 1rem;
    font-size: 0.62rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .breakdown-header.employer { color: var(--orange); background: rgba(251,146,60,0.07); border-bottom-color: rgba(251,146,60,0.2); }
  .breakdown-header.employee { color: var(--blue); background: rgba(96,165,250,0.07); border-bottom-color: rgba(96,165,250,0.2); }
  .breakdown-header.tax { color: var(--accent3); background: rgba(255,107,107,0.07); border-bottom-color: rgba(255,107,107,0.2); }

  .breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.55rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    transition: background 0.15s;
  }

  .breakdown-row:last-child { border-bottom: none; }
  .breakdown-row:hover { background: rgba(255,255,255,0.02); }
  .breakdown-row .name { color: var(--text-dim); font-family: var(--font-mono), monospace; font-size: 0.75rem; }
  .breakdown-row .rate { color: var(--text-muted); font-family: var(--font-mono), monospace; font-size: 0.68rem; margin-right: 0.5rem; }
  .breakdown-row .val { font-family: var(--font-mono), monospace; font-weight: 500; color: var(--text); }
  .breakdown-row .val.negative { color: var(--accent3); }
  .breakdown-row .val.total { font-weight: 700; color: #fff; }
  .breakdown-row.subtotal { background: rgba(255,255,255,0.03); }
  .breakdown-row.subtotal .name { color: var(--text); font-weight: 600; font-family: var(--font-display), sans-serif; font-size: 0.82rem; }
  .breakdown-row.zero { opacity: 0.4; }
  .breakdown-row .tag {
    font-size: 0.58rem;
    font-family: var(--font-mono), monospace;
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    margin-left: 0.4rem;
    letter-spacing: 0.05em;
    vertical-align: middle;
  }
  .tag.green { background: rgba(74,222,128,0.15); color: var(--green); }
  .tag.orange { background: rgba(251,146,60,0.15); color: var(--orange); }

  /* ANNUAL TABLE */
  .annual-section {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 1rem;
  }

  .annual-header {
    padding: 0.65rem 1rem;
    font-size: 0.62rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    background: rgba(232,255,71,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .annual-table {
    width: 100%;
    border-collapse: collapse;
  }

  .annual-table th {
    font-size: 0.62rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    text-align: right;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border);
  }

  .annual-table th:first-child { text-align: left; }

  .annual-table td {
    padding: 0.5rem 1rem;
    font-family: var(--font-mono), monospace;
    font-size: 0.75rem;
    text-align: right;
    border-bottom: 1px solid rgba(42,45,58,0.5);
    color: var(--text-dim);
  }

  .annual-table td:first-child { text-align: left; color: var(--text); }
  .annual-table tr:hover td { background: rgba(255,255,255,0.02); }

  .annual-table tr.month-limit td { background: rgba(232,255,71,0.04); }
  .annual-table tr.month-limit td:first-child::after {
    content: ' ★';
    color: var(--accent);
    font-size: 0.6rem;
  }

  .annual-table tfoot td {
    font-weight: 700;
    color: #fff;
    background: rgba(255,255,255,0.04);
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
  }

  /* EFFECTIVE RATE */
  .rate-bar-wrap {
    margin-top: 1rem;
    padding: 1rem 1.1rem;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
  }

  .rate-bar-label {
    font-size: 0.62rem;
    font-family: var(--font-mono), monospace;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
  }

  .rate-bars { display: flex; flex-direction: column; gap: 0.5rem; }

  .rate-bar-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.72rem;
    font-family: var(--font-mono), monospace;
  }

  .rate-bar-name { width: 160px; color: var(--text-dim); flex-shrink: 0; }
  .rate-bar-track {
    flex: 1;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
  }
  .rate-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .rate-bar-pct { width: 40px; text-align: right; color: var(--text); }

  .divider { height: 1px; background: var(--border); margin: 1rem 0; }

  .results-note {
    font-size: 0.68rem;
    font-family: var(--font-mono), monospace;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    line-height: 1.6;
  }

  .results-note strong { color: var(--accent); }

  /* SCROLL */
  .results-scroll { overflow-y: auto; }
  /* ── LANG SWITCHER ── */
  .lang-switcher {
    display: flex; gap: 0.35rem; margin-left: auto; align-items: center;
  }
  .lang-btn {
    background: var(--surface2); border: 1px solid var(--border);
    color: var(--text-dim); font-family: var(--font-mono), monospace; font-size: 0.65rem;
    font-weight: 500; padding: 0.3rem 0.55rem; border-radius: 5px;
    cursor: pointer; letter-spacing: 0.05em; transition: all 0.15s;
  }
  .lang-btn:hover { border-color: var(--accent); color: var(--accent); }
  .lang-btn.active { background: var(--accent); color: #0e0f14; border-color: var(--accent); font-weight: 700; }