: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-revenue: #2a78d6; /* categorical slot 1 - blue */
  --series-expense: #eb6834; /* categorical slot 2 - orange */
  --status-good:    #0ca30c;
  --status-critical:#d03b3b;
  --seq-100: #cde2fb;
  --seq-450: #2a78d6;
  --radius-card: 14px;
  --radius-field: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    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-revenue: #3987e5;
    --series-expense: #d95926;
    --status-good:    #0ca30c;
    --status-critical:#e66767;
    --seq-100: #184f95;
    --seq-450: #3987e5;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page-plane);
  color: var(--text-primary);
}
.muted { color: var(--text-muted); }

.app-shell { max-width: 1080px; margin: 0 auto; padding: 0 16px 64px; }

.app-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--page-plane);
  padding: 18px 0 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.brand-mark { font-size: 26px; }
.brand-title { font-size: 18px; font-weight: 700; line-height: 1.2; }
.brand-sub { font-size: 12px; color: var(--text-muted); }

.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab-btn {
  appearance: none; border: none; background: transparent;
  padding: 9px 14px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: var(--text-secondary); cursor: pointer;
}
.tab-btn:hover { background: var(--gridline); }
.tab-btn.is-active { background: var(--series-revenue); color: #fff; }

.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 820px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 18px;
  margin-bottom: 16px;
}
.card-title { font-size: 15px; font-weight: 700; margin: 0 0 12px; }
.card-title-row { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; }
.card-title-row .card-title { margin: 0; }
.stat-inline { font-size: 13px; }
.stat-inline strong { font-size: 15px; margin-left: 4px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.form-grid-compact { grid-template-columns: 1fr 1fr; }
.field { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--text-secondary); }
.field-wide { grid-column: 1 / -1; }
.field input, .field select {
  font: inherit; font-size: 14px; color: var(--text-primary);
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius-field); padding: 9px 10px;
}
.field input:focus, .field select:focus { outline: 2px solid var(--series-revenue); outline-offset: 1px; }
.form-actions { grid-column: 1 / -1; display: flex; align-items: center; gap: 12px; margin-top: 4px; }

.btn {
  appearance: none; border: none; cursor: pointer; font: inherit; font-weight: 600; font-size: 14px;
  padding: 10px 18px; border-radius: 999px;
}
.btn-primary { background: var(--series-revenue); color: #fff; }
.btn-primary:hover { opacity: .92; }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text-primary); }
.btn-danger-ghost {
  background: transparent; border: none; color: var(--status-critical);
  cursor: pointer; font-size: 12px; font-weight: 600; padding: 4px 8px;
}
.form-msg { font-size: 13px; color: var(--status-good); }
.form-msg.is-error { color: var(--status-critical); }

.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left; font-weight: 600; color: var(--text-muted);
  padding: 8px 10px; border-bottom: 1px solid var(--gridline); white-space: nowrap;
}
.data-table td {
  padding: 9px 10px; border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}
.data-table td.num, .data-table th.num { text-align: right; }
.data-table tbody tr:hover { background: var(--page-plane); }
.empty-state { color: var(--text-muted); font-size: 13px; padding: 10px 2px; }

/* ---- Report: filters ---- */
.filter-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.month-nav { display: flex; align-items: center; justify-content: center; gap: 16px; width: 100%; font-size: 15px; }
.month-nav .btn { padding: 6px 14px; }
.preset-group { display: flex; gap: 6px; flex-wrap: wrap; }
.preset-btn {
  appearance: none; border: 1px solid var(--border); background: transparent;
  color: var(--text-secondary); font: inherit; font-size: 13px; font-weight: 600;
  padding: 7px 12px; border-radius: 999px; cursor: pointer;
}
.preset-btn.is-active { background: var(--series-revenue); border-color: var(--series-revenue); color: #fff; }
.custom-range { display: flex; align-items: center; gap: 8px; }
.custom-range input {
  font: inherit; font-size: 13px; padding: 7px 8px; border-radius: var(--radius-field);
  border: 1px solid var(--border); background: var(--surface-1); color: var(--text-primary);
}

/* ---- Stat tiles ---- */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
@media (max-width: 720px) { .stat-row { grid-template-columns: 1fr 1fr; } }
.stat-tile {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 16px;
}
.stat-label { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.stat-value { font-size: 22px; font-weight: 700; }

/* ---- Bar chart (day) ---- */
.chart-legend { display: flex; gap: 16px; margin-bottom: 10px; font-size: 12px; color: var(--text-secondary); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.legend-swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.swatch-revenue { background: var(--series-revenue); }
.swatch-expense { background: var(--series-expense); }

.bar-chart {
  display: flex; align-items: flex-end; gap: 14px; height: 200px;
  padding: 8px 4px 0; border-bottom: 1px solid var(--baseline);
  overflow-x: auto;
}
.bar-chart-col { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; min-width: 34px; flex-shrink: 0; }
.bar-chart-bars { display: flex; align-items: flex-end; gap: 2px; height: 100%; }
.bar-chart-bar {
  width: 16px; max-width: 24px; border-radius: 4px 4px 0 0;
  position: relative; cursor: default;
}
.bar-revenue { background: var(--series-revenue); }
.bar-expense { background: var(--series-expense); }
.bar-chart-label { margin-top: 6px; font-size: 11px; color: var(--text-muted); white-space: nowrap; }

.bar-chart-bar:hover::after,
.rank-bar:hover .rank-fill::after {
  content: attr(data-tip);
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  background: var(--text-primary); color: var(--surface-1);
  font-size: 11px; padding: 4px 7px; border-radius: 6px; white-space: nowrap;
  margin-bottom: 6px; pointer-events: none; z-index: 5;
}

/* ---- Rank bars (service / staff / payment breakdown) ---- */
.rank-bars { display: flex; flex-direction: column; gap: 10px; }
.rank-row { display: grid; grid-template-columns: 140px 1fr auto; align-items: center; gap: 10px; font-size: 13px; }
.rank-name { color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-track { background: var(--gridline); border-radius: 4px; height: 10px; position: relative; }
.rank-fill { height: 10px; border-radius: 4px; background: var(--series-revenue); position: relative; }
.rank-value { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }

@media (max-width: 560px) {
  .rank-row { grid-template-columns: 96px 1fr auto; }
  .form-grid { grid-template-columns: 1fr; }
}

/* ================= App shell / mobile-first layout ================= */
.app-shell { max-width: 1080px; margin: 0 auto; padding: 0 16px calc(84px + env(safe-area-inset-bottom)); }
.app-header { padding: 14px 0 10px; }
.brand { position: relative; }
.btn-icon {
  appearance: none; border: none; background: transparent; cursor: pointer;
  font-size: 18px; color: var(--text-secondary); padding: 6px 8px; border-radius: 999px;
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
}
.btn-icon:hover { background: var(--gridline); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; }

/* ---- Bottom nav (mobile-first tab bar) ---- */
.bottom-nav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  display: flex; justify-content: space-around;
  background: var(--surface-1); border-top: 1px solid var(--border);
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
}
.nav-btn {
  appearance: none; border: none; background: transparent; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  color: var(--text-muted); font: inherit; font-size: 11px; font-weight: 600;
  padding: 4px 10px; border-radius: 10px; flex: 1; max-width: 96px;
}
.nav-btn .nav-icon { font-size: 19px; line-height: 1; }
.nav-btn.is-active { color: var(--series-revenue); }
.nav-btn[hidden] { display: none; }

/* ---- Login screen ---- */
.login-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--page-plane); padding: 24px;
}
.login-card {
  width: 100%; max-width: 360px; background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 28px 22px;
}
.brand-center { display: flex; flex-direction: column; align-items: center; gap: 6px; margin-bottom: 22px; text-align: center; }
.brand-center .brand-mark { font-size: 36px; }

/* ---- Room board ---- */
.room-board {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px;
}
.room-card {
  border: 1px solid var(--border); border-radius: var(--radius-card); padding: 14px;
  display: flex; flex-direction: column; gap: 8px; background: var(--page-plane);
}
.room-card.is-free { border-color: var(--border); }
.room-card.is-occupied { background: rgba(235,104,52,0.08); border-color: var(--series-expense); }
.room-card.is-done { background: rgba(12,163,12,0.08); border-color: var(--status-good); }
.room-name { font-weight: 700; font-size: 15px; }
.room-status-badge {
  display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 700;
  padding: 3px 8px; border-radius: 999px; width: fit-content;
}
.room-status-badge.free { background: var(--gridline); color: var(--text-secondary); }
.room-status-badge.occupied { background: var(--series-expense); color: #fff; }
.room-status-badge.done { background: var(--status-good); color: #fff; }
.room-meta { font-size: 12px; color: var(--text-secondary); line-height: 1.5; }
.room-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; }
.room-actions .btn { flex: 1; padding: 8px 10px; font-size: 12px; }

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 50;
  display: flex; align-items: flex-end; justify-content: center;
}
@media (min-width: 640px) { .modal-backdrop { align-items: center; } }
.modal-card {
  width: 100%; max-width: 480px; background: var(--surface-1);
  border-radius: 18px 18px 0 0; padding: 18px; max-height: 88vh; overflow-y: auto;
}
@media (min-width: 640px) { .modal-card { border-radius: var(--radius-card); } }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.modal-header h3 { margin: 0; font-size: 16px; }
.modal-header .btn-icon { position: static; transform: none; }

/* ---- Toast ---- */
.toast {
  position: fixed; left: 50%; bottom: calc(96px + env(safe-area-inset-bottom));
  transform: translateX(-50%); background: var(--text-primary); color: var(--surface-1);
  padding: 10px 18px; border-radius: 999px; font-size: 13px; font-weight: 600; z-index: 60;
  box-shadow: 0 4px 14px rgba(0,0,0,0.2);
}
.toast.is-error { background: var(--status-critical); color: #fff; }

[hidden] { display: none !important; }