:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c232c;
  --border: #2a3340;
  --text: #e6edf3;
  --muted: #8b949e;
  --primary: #2f81f7;
  --primary-hover: #4a96fa;
  --success: #3fb950;
  --warn: #d29922;
  --danger: #f85149;
  --accent: #a371f7;
  --radius: 8px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.muted { color: var(--muted); font-weight: normal; font-size: 13px; }
.hint { color: var(--muted); font-size: 12px; margin-left: 4px; }

.actions { display: flex; gap: 10px; align-items: center; }

.layout {
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(420px, 1.2fr);
  gap: 16px;
  padding: 16px;
  align-items: start;
}

@media (max-width: 1100px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--panel-2);
}
details > summary {
  cursor: pointer;
  padding: 10px 14px;
  font-weight: 600;
  user-select: none;
  list-style: none;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 8px;
  transition: transform 0.15s;
  color: var(--muted);
}
details[open] > summary::before { transform: rotate(90deg); }
details > *:not(summary) { padding: 0 14px 12px; }

.section-title {
  margin: 12px 0 6px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-end;
  margin-bottom: 8px;
}
.form-row label { min-width: 150px; }

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}
.computed-field {
  min-width: 150px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--muted);
  font-size: 13px;
}
.computed-field strong {
  min-height: 33px;
  display: flex;
  align-items: center;
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
}

input[type="number"],
input[type="text"],
select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 14px;
  font-family: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--primary); }

button {
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-family: inherit;
  background: var(--panel-2);
  color: var(--text);
  transition: all 0.15s;
}
button:hover { background: var(--border); }
.btn-primary {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  padding: 10px 20px;
  font-weight: 600;
  width: 100%;
  margin-top: 8px;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--panel-2); }
.btn-ghost { background: transparent; }

.month-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 8px;
}
@media (max-width: 700px) { .month-grid { grid-template-columns: repeat(2, 1fr); } }

.month-cell {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}
.month-cell label { font-size: 11px; }
.month-cell input { width: 100%; }

.rsu-row {
  display: grid;
  grid-template-columns: minmax(140px, 1.2fr) minmax(140px, 1.1fr) minmax(80px, 0.6fr) minmax(80px, 0.6fr);
  gap: 8px;
  margin-bottom: 6px;
  align-items: end;
  background: var(--bg);
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.rsu-row label { font-size: 11px; }
.rsu-row .price-row { display: flex; gap: 4px; }
.rsu-row .price-row input { flex: 1; }
.rsu-row .price-row button { padding-left: 8px; padding-right: 8px; }
.stock-price strong {
  min-height: 32px;
  font-size: 14px;
  white-space: nowrap;
}
.rsu-row .stock-price {
  grid-column: 1 / span 2;
}
.rsu-row .btn-price {
  grid-column: 3;
  height: 32px;
}
.rsu-row .btn-del {
  grid-column: 4;
  align-self: end;
  height: 32px;
  padding: 0 10px;
  background: transparent;
  color: var(--danger);
  border-color: var(--border);
}
.rsu-row .price-meta {
  font-size: 11px;
  color: var(--muted);
  grid-column: 1 / -1;
  margin-top: 2px;
}

@media (max-width: 700px) {
  .rsu-row { grid-template-columns: 1fr 1fr; }
  .rsu-row .stock-price { grid-column: 1 / -1; }
  .rsu-row .btn-price { grid-column: 1; }
  .rsu-row .btn-del { grid-column: 2; }
  .rsu-row .btn-price,
  .rsu-row .btn-del { width: 100%; }
}

/* Results */
.placeholder {
  text-align: center;
  color: var(--muted);
  padding: 40px 20px;
}
.placeholder ul { display: inline-block; text-align: left; }

.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.card .label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.card .value {
  font-size: 22px;
  font-weight: 600;
}
.card.income .value { color: var(--success); }
.card.tax .value { color: var(--danger); }
.card.takehome .value { color: var(--primary); }
.card.effective .value { color: var(--accent); }

.breakdown {
  margin-top: 12px;
  margin-bottom: 16px;
}
.breakdown h3 {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: var(--panel-2);
  border-radius: 6px;
  overflow: hidden;
}
th, td {
  padding: 8px 10px;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
th { background: var(--bg); color: var(--muted); font-weight: 500; text-align: right; }
th:first-child, td:first-child { text-align: left; }
td:last-child { color: var(--muted); font-size: 12px; }
tr:last-child td { border-bottom: none; }
tr.total { font-weight: 600; background: var(--bg); }
tr.total td { border-top: 1px solid var(--border); }
.table-wrap {
  width: 100%;
  overflow-x: auto;
}
.table-wrap table { min-width: 720px; }

.tag {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  background: var(--border);
  color: var(--text);
  margin-left: 6px;
}
.tag.success { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.tag.warn { background: rgba(210, 153, 34, 0.15); color: var(--warn); }
.tag.danger { background: rgba(248, 81, 73, 0.15); color: var(--danger); }

.advice {
  background: rgba(47, 129, 247, 0.08);
  border: 1px solid rgba(47, 129, 247, 0.3);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 14px;
  font-size: 13px;
}

.foot {
  text-align: center;
  padding: 16px;
  border-top: 1px solid var(--border);
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 100;
}
.toast.show { opacity: 1; }
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }