:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #3b82f6;
  --expense: #ef4444;
  --income: #10b981;
  --border: #334155;
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Apple SD Gothic Neo",
    "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.9rem; }
.right { text-align: right; }
.full { grid-column: 1 / -1; }

/* ---------- Login ---------- */
.login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  background: var(--surface);
  padding: 2.5rem;
  border-radius: var(--radius);
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}
.login-card h1 { text-align: center; }
.login-card p { text-align: center; margin-bottom: 0.5rem; }

/* ---------- Layout ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 1.5rem;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 700; font-size: 1.2rem; }
.tabs { display: flex; gap: 0.25rem; flex: 1; }
.tab {
  background: transparent;
  color: var(--muted);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
}
.tab:hover { background: var(--surface-2); color: var(--text); }
.tab.active { background: var(--primary); color: #fff; }

.content { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

/* ---------- Cards (KPI) ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border-left: 4px solid var(--surface-2);
}
.card.expense { border-left-color: var(--expense); }
.card.income { border-left-color: var(--income); }
.card.net { border-left-color: var(--primary); }
.card-label { color: var(--muted); font-size: 0.85rem; }
.card-value { font-size: 1.6rem; font-weight: 700; }

/* ---------- Charts ---------- */
.charts { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.chart-box { background: var(--surface); border-radius: var(--radius); padding: 1.25rem; }
.chart-box h3 { font-size: 1rem; margin-bottom: 1rem; }
.chart-box canvas { max-height: 280px; }

/* ---------- Tables ---------- */
.data-table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: var(--radius); overflow: hidden; }
.data-table th, .data-table td { padding: 0.7rem 1rem; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
.data-table th { color: var(--muted); font-weight: 600; background: var(--surface-2); }
.data-table tbody tr:hover { background: var(--surface-2); }
.breakdown { margin-top: 1rem; }
.breakdown h3 { margin-bottom: 0.75rem; }

.cat-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.amount-expense { color: var(--expense); font-weight: 600; }
.amount-income { color: var(--income); font-weight: 600; }

/* 거래내역 인라인 카테고리 드롭다운 */
.cat-select { padding: 0.3rem 0.4rem; font-size: 0.85rem; max-width: 160px; }

/* 거래내역 합계 바 */
.tx-summary {
  margin: 0 0 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--surface);
  border-radius: 8px;
  font-size: 0.95rem;
}
.tx-summary:empty { display: none; }

/* ---------- Filters ---------- */
.filters { display: flex; gap: 0.6rem; margin-bottom: 1rem; flex-wrap: wrap; }
.filters input, .filters select { flex: 0 0 auto; }
#filter-search { flex: 1; min-width: 180px; }

/* ---------- Forms ---------- */
input, select, button {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
button {
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
}
button:hover { filter: brightness(1.1); }
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--muted); }
button.ghost:hover { color: var(--text); }
button.danger { background: var(--expense); }
button.danger:hover { filter: brightness(1.1); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  background: var(--surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  max-width: 640px;
}
.form-grid label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.85rem; color: var(--muted); }
.form-grid input, .form-grid select { color: var(--text); }

.inline-form { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.inline-form input[type="text"] { min-width: 200px; }

.settings-block {
  background: var(--surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
}
.settings-block h3 { margin-bottom: 0.75rem; }

.chip-list { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface-2);
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
}
.chip button {
  background: transparent;
  color: var(--muted);
  padding: 0;
  font-size: 1rem;
  line-height: 1;
}
.chip button:hover { color: var(--expense); }

.icon-btn { background: transparent; color: var(--muted); padding: 0.2rem 0.5rem; }
.icon-btn:hover { color: var(--expense); }

/* ---------- Messages ---------- */
.error { color: var(--expense); font-size: 0.85rem; text-align: center; }
.msg { padding: 0.6rem; border-radius: 8px; font-size: 0.9rem; }
.msg.success { background: rgba(16, 185, 129, 0.15); color: var(--income); }
.msg.error { background: rgba(239, 68, 68, 0.15); color: var(--expense); text-align: left; }
.result-box {
  margin-top: 1rem;
  background: var(--surface);
  padding: 1.25rem;
  border-radius: var(--radius);
  max-width: 640px;
}
.upload-help { background: var(--surface); padding: 1.25rem; border-radius: var(--radius); margin-bottom: 1rem; max-width: 640px; }
.upload-help p { margin-bottom: 0.5rem; }

.month-select, #filter-category { min-width: 130px; }

@media (max-width: 768px) {
  .charts { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .topbar { flex-wrap: wrap; height: auto; padding: 0.75rem 1rem; }
  .tabs { order: 3; width: 100%; overflow-x: auto; }
}