*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #2dd4bf;
  --accent-dim: #0f766e;
  --danger: #f87171;
  --warning: #fbbf24;
  --border: #334155;
  --radius: 8px;
  --gap: 12px;
}
body {
  width: 380px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  font-size: 13px;
  line-height: 1.45;
  overflow-x: hidden;
}
#app { padding: 16px; }
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 22px; }
.brand h1 { font-size: 18px; font-weight: 700; letter-spacing: -0.3px; }
.brand p { color: var(--muted); font-size: 12px; margin-top: 2px; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  padding: 6px 8px;
  font-size: 14px;
}
.icon-btn:hover { background: var(--card); }

.overview .card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.overview .label { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.overview .big-number { font-size: 32px; font-weight: 800; margin: 6px 0; color: var(--accent); }
.overview .sub { color: var(--muted); font-size: 12px; margin-top: 4px; }
.progress-wrap { margin-top: 10px; height: 8px; background: #0f172a; border-radius: 4px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--accent); transition: width 0.3s ease; }

h2 { font-size: 14px; font-weight: 600; margin: 14px 0 8px; }

.tools-section, .add-usage-section, .trend-section { margin-bottom: 14px; }

.tools-list { display: flex; flex-direction: column; gap: 8px; }
.tool-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.tool-left { display: flex; flex-direction: column; gap: 2px; }
.tool-name { font-weight: 600; font-size: 13px; }
.tool-meta { color: var(--muted); font-size: 11px; }
.tool-right { text-align: right; }
.tool-spend { font-weight: 700; font-size: 14px; }
.tool-budget { font-size: 11px; color: var(--muted); }
.tool-actions { display: flex; gap: 6px; margin-top: 6px; }
.btn-small {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 11px;
}
.btn-small:hover { background: var(--border); }

.form { display: flex; flex-direction: column; gap: 8px; }
.form.compact { flex-direction: row; flex-wrap: wrap; gap: 6px; }
.form.compact input, .form.compact select { flex: 1 1 120px; }
.form.compact button { flex: 0 0 auto; }
input, select, textarea {
  background: #0f172a;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
  width: 100%;
}
input:focus, select:focus { border-color: var(--accent); }
.btn-primary {
  background: var(--accent-dim);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent); color: #000; }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
}
.btn-danger {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  width: 100%;
}

.trend-list { display: flex; flex-direction: column; gap: 6px; max-height: 180px; overflow-y: auto; }
.trend-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 8px;
  background: var(--card);
  border-radius: 6px;
  font-size: 12px;
}
.trend-row .day { color: var(--muted); }
.trend-row .val { font-weight: 600; }

.empty-state { text-align: center; padding: 30px 16px; color: var(--muted); }
.empty-icon { font-size: 36px; margin-bottom: 8px; }
.empty-state p { font-size: 13px; }
.hidden { display: none !important; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  width: 340px;
}
.modal-content h2 { margin-bottom: 12px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }
.danger-zone { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }
.row { display: flex; align-items: center; gap: 8px; margin-top: 4px; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }