:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --page-plane:     #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);
  --series-1:       #2a78d6;
  --series-1-wash:  rgba(42,120,214,0.10);
  --good:           #006300;
  --critical:       #d03b3b;
  --warning-bg:     #fff6e5;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --page-plane:     #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255,255,255,0.10);
    --series-1:       #3987e5;
    --series-1-wash:  rgba(57,135,229,0.14);
    --good:           #0ca30c;
    --critical:       #e66767;
    --warning-bg:     #2a2410;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--page-plane);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

.app-header {
  padding: 24px 20px 12px;
  text-align: center;
}
.app-header h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
}
.tagline {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.app-header-top {
  max-width: 880px;
  margin: 0 auto 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.company-name {
  font-weight: 600;
  color: var(--text-secondary);
}
.btn-small {
  min-height: 36px;
  padding: 6px 14px;
  font-size: 0.85rem;
}

.login-body { display: flex; flex-direction: column; min-height: 100vh; }
.login-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  max-width: 360px;
  width: 100%;
}
.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-help {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.app-main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px 64px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}
.card h2 {
  margin: 0 0 14px;
  font-size: 1.15rem;
}
.card h3 {
  margin: 24px 0 10px;
  font-size: 1rem;
  color: var(--text-secondary);
}

.guide-box {
  position: relative;
  background: var(--warning-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 44px 20px 20px;
}
.guide-box h2 { margin: 0 0 8px; font-size: 1.05rem; }
.guide-box ol { margin: 0; padding-left: 1.2em; }
.guide-box li { margin-bottom: 6px; }
.guide-close {
  position: absolute;
  top: 10px; right: 10px;
  width: 32px; height: 32px;
  border-radius: 8px;
  border: none;
  background: transparent;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-secondary);
}
.guide-close:hover { background: var(--border); }

.entry-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
}
.field-memo { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 600; font-size: 0.95rem; }
.field input {
  font-size: 1.1rem;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--baseline);
  background: var(--surface-1);
  color: var(--text-primary);
  min-height: 48px;
}
.field input:focus {
  outline: 3px solid var(--series-1);
  outline-offset: 1px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 10px;
  border: 1px solid var(--baseline);
  background: var(--surface-1);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}
.btn:hover { background: var(--gridline); }
.btn-primary {
  grid-column: 1 / -1;
  background: var(--series-1);
  border-color: var(--series-1);
  color: #ffffff;
  font-size: 1.15rem;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-large { padding: 16px 20px; }
.btn-secondary { background: var(--surface-1); }
.btn-tertiary { background: transparent; border-color: transparent; color: var(--text-secondary); }
.btn-danger { color: var(--critical); border-color: var(--critical); background: transparent; }
.btn-danger:hover { background: var(--critical); color: #fff; }

.field-error {
  margin-top: 12px;
  color: var(--critical);
  font-weight: 600;
}
.field-ok {
  margin-top: 12px;
  color: var(--good);
  font-weight: 600;
}

.kpi-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
}
.stat-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 6px;
}
.stat-value {
  font-size: 1.7rem;
  font-weight: 700;
  font-variant-numeric: proportional-nums;
}
.stat-delta {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.stat-delta.up { color: var(--good); }
.stat-delta.down { color: var(--critical); }

.chart-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.chart-card-head h2 { margin: 0; }

.period-buttons {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.period-btn {
  min-height: 40px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--baseline);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
}
.period-btn.is-active {
  background: var(--series-1);
  border-color: var(--series-1);
  color: #fff;
}

.chart-wrap {
  width: 100%;
  overflow-x: auto;
}
.chart-wrap svg { display: block; width: 100%; height: auto; }
.chart-empty {
  color: var(--text-muted);
  padding: 24px 4px;
  text-align: center;
}

.mark-hit { cursor: pointer; }
.mark-hit:focus { outline: 2px solid var(--series-1); }

.chart-tooltip {
  position: fixed;
  z-index: 1000;
  pointer-events: none;
  background: var(--text-primary);
  color: var(--page-plane);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  line-height: 1.5;
  max-width: 220px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
}
.chart-tooltip .tt-value { font-weight: 700; font-size: 0.95rem; }
.chart-tooltip .tt-label { opacity: 0.8; }

.data-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
thead th {
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--gridline);
  padding: 8px 10px;
}
tbody td {
  padding: 10px;
  border-bottom: 1px solid var(--gridline);
  vertical-align: middle;
}
tbody tr:hover { background: var(--gridline); }
.row-amount { text-align: right; white-space: nowrap; }
.row-actions { text-align: right; white-space: nowrap; }
.row-actions button {
  min-height: 36px;
  padding: 6px 12px;
  margin-left: 6px;
  border-radius: 8px;
  border: 1px solid var(--baseline);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
}
.row-actions button:hover { background: var(--gridline); }
.row-actions .row-delete { color: var(--critical); border-color: var(--critical); }
.row-actions .row-delete:hover { background: var(--critical); color: #fff; }

.dialog-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 16px;
}
.dialog-backdrop[hidden] {
  display: none;
}
.dialog {
  background: var(--surface-1);
  border-radius: 14px;
  padding: 24px;
  max-width: 420px;
  width: 100%;
}
.dialog h2 { margin: 0 0 10px; font-size: 1.1rem; }
.dialog p { margin: 0 0 18px; color: var(--text-secondary); }
.dialog-actions { display: flex; flex-direction: column; gap: 8px; }

@media (max-width: 560px) {
  .entry-form { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: 1fr; }
  html, body { font-size: 16px; }
}