/* =====================================================================
 * PAI design system - shared by the admin and the client portal.
 * Oct 2026 (rev 2): "Rail Freight ERP" look - deep-blue gradient header,
 * light grey page, white bordered cards, plain compact grids.
 *
 * ONE place for colours, fonts, sizes, radii and the shared components.
 * Pages should use these tokens (var(--pai-...)) instead of hex codes.
 *
 *   Loaded by:  static/pai/admin.css (admin)  and
 *               client_portal/templates/client_portal/base_portal.html
 *   Density:    compact only.
 * ===================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* type */
  --pai-font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --pai-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* surfaces + lines */
  --pai-bg: #F4F6F9;
  --pai-surface: #FFFFFF;
  --pai-surface-2: #F8FAFC;
  --pai-line: #E5E7EB;
  --pai-line-strong: #CBD5E1;

  /* text */
  --pai-ink: #1E293B;
  --pai-ink-2: #475569;
  --pai-ink-3: #64748B;

  /* brand */
  --pai-primary: #0F4C81;
  --pai-primary-strong: #0B3A63;
  --pai-primary-soft: #EAF2FB;
  --pai-primary-ink: #FFFFFF;
  --pai-focus: 0 0 0 3px rgba(15, 76, 129, .18);

  /* header (top bar) + navigation */
  --pai-header-bg: linear-gradient(90deg, #0F4C81, #1E3A8A);
  --pai-header-h: 54px;
  --pai-nav-bg: #0F4C81;                 /* solid version of the header (login panel, etc.) */
  --pai-nav-ink: rgba(255, 255, 255, .86);
  --pai-nav-ink-strong: #FFFFFF;
  --pai-nav-hover: rgba(255, 255, 255, .12);
  --pai-nav-active: rgba(255, 255, 255, .18);
  --pai-nav-line: rgba(255, 255, 255, .16);

  /* grids */
  --pai-th-bg: #F8FAFC;
  --pai-th-ink: #1E293B;
  --pai-row-line: #ECEFF3;
  --pai-row-hover: #F8FBFF;

  /* status - reserved, never used as decoration */
  --pai-ok: #166534;      --pai-ok-bg: #DCFCE7;
  --pai-warn: #92400E;    --pai-warn-bg: #FEF3C7;
  --pai-bad: #B91C1C;     --pai-bad-bg: #FEE2E2;
  --pai-info: #1E40AF;    --pai-info-bg: #DBEAFE;

  /* KPI / chart series (fixed order) */
  --pai-k1: #0F4C81; --pai-k2: #2563EB; --pai-k3: #B45309; --pai-k4: #7C3AED; --pai-k5: #0891B2; --pai-k6: #BE185D;
  --pai-bar-fill: linear-gradient(#60A5FA, #0F4C81);
  --pai-bar-fill-h: linear-gradient(90deg, #60A5FA, #0F4C81);

  /* shape */
  --pai-radius: 10px;
  --pai-radius-sm: 6px;
  --pai-shadow: none;
  --pai-shadow-pop: 0 12px 32px rgba(15, 23, 42, .16);

  /* sizes (compact) */
  --pai-fs: 13px;          /* body / inputs */
  --pai-fs-table: 12px;    /* grid cells */
  --pai-fs-th: 12px;       /* grid headers */
  --pai-fs-label: 12px;    /* form labels */
  --pai-fs-kpi-label: 11px;
  --pai-row: 30px;         /* grid row height */
  --pai-ctl: 32px;         /* input / button height */
  --pai-pad: 12px;         /* card padding */
  --pai-cell-x: 10px;      /* grid cell side padding */
}

/* =====================================================================
 * Components - usable on any page, admin or portal.
 * ===================================================================== */

/* buttons: one primary per screen; everything else quiet */
.pai-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  height: var(--pai-ctl); padding: 0 14px; border-radius: var(--pai-radius-sm);
  border: 1px solid var(--pai-line-strong); background: var(--pai-surface); color: var(--pai-ink);
  font: 600 var(--pai-fs) var(--pai-font); line-height: 1; text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background .12s, border-color .12s, color .12s;
}
.pai-btn:hover { background: var(--pai-surface-2); border-color: var(--pai-ink-3); color: var(--pai-ink); text-decoration: none; }
.pai-btn:focus-visible { outline: none; box-shadow: var(--pai-focus); }
.pai-btn--primary { background: var(--pai-primary); border-color: var(--pai-primary); color: var(--pai-primary-ink); }
.pai-btn--primary:hover { background: var(--pai-primary-strong); border-color: var(--pai-primary-strong); color: var(--pai-primary-ink); }
.pai-btn--ghost { background: transparent; border-color: transparent; color: var(--pai-ink-2); }
.pai-btn--ghost:hover { background: var(--pai-surface-2); border-color: transparent; }
.pai-btn--danger { background: transparent; border-color: transparent; color: var(--pai-bad); }
.pai-btn--danger:hover { background: var(--pai-bad-bg); border-color: transparent; color: var(--pai-bad); }
.pai-btn svg { width: 15px; height: 15px; }

/* card */
.pai-card { background: var(--pai-surface); border: 1px solid var(--pai-line); border-radius: var(--pai-radius); box-shadow: var(--pai-shadow); }
.pai-card__head { display: flex; align-items: center; gap: 10px; padding: 10px var(--pai-pad); border-bottom: 1px solid var(--pai-line); }
.pai-card__title { margin: 0; font-size: 14px; font-weight: 700; color: var(--pai-ink); }
.pai-card__body { padding: var(--pai-pad); }

/* KPI tile */
.pai-kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 14px; }
.pai-kpi { --c: var(--pai-k1); background: var(--pai-surface); border: 1px solid var(--pai-line); border-radius: var(--pai-radius); padding: 12px 14px; box-shadow: var(--pai-shadow); min-width: 0; }
.pai-kpi__label { font-size: var(--pai-fs-kpi-label); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--pai-ink-3); }
.pai-kpi__value { margin-top: 4px; font-size: 24px; font-weight: 700; letter-spacing: -.01em; color: var(--pai-ink); font-variant-numeric: tabular-nums; }
.pai-kpi__note { font-size: 11.5px; color: var(--pai-ink-3); margin-top: 1px; }

/* pills (status) and tags (codes / types) */
.pai-pill { display: inline-flex; align-items: center; gap: 5px; height: 22px; padding: 0 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; white-space: nowrap; background: var(--pai-surface-2); color: var(--pai-ink-2); }
.pai-pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.pai-pill--ok { background: var(--pai-ok-bg); color: var(--pai-ok); }
.pai-pill--warn { background: var(--pai-warn-bg); color: var(--pai-warn); }
.pai-pill--bad { background: var(--pai-bad-bg); color: var(--pai-bad); }
.pai-pill--info { background: var(--pai-info-bg); color: var(--pai-info); }
.pai-tag { display: inline-block; padding: 2px 7px; border-radius: 5px; border: 1px solid var(--pai-line); background: var(--pai-surface-2); font-size: 11.5px; font-weight: 600; color: var(--pai-ink-2); white-space: nowrap; }
.pai-mono { font-family: var(--pai-mono); font-size: .95em; }

/* alerts */
.pai-alert { display: flex; gap: 10px; align-items: flex-start; padding: 10px 14px; border-radius: var(--pai-radius); border: 1px solid var(--pai-line); background: var(--pai-surface); color: var(--pai-ink-2); font-size: 13px; margin-bottom: 12px; }
.pai-alert--ok { background: var(--pai-ok-bg); border-color: rgba(21, 128, 61, .22); color: var(--pai-ok); }
.pai-alert--warn { background: var(--pai-warn-bg); border-color: rgba(180, 83, 9, .22); color: var(--pai-warn); }
.pai-alert--bad { background: var(--pai-bad-bg); border-color: rgba(180, 35, 24, .22); color: var(--pai-bad); }
.pai-alert--info { background: var(--pai-info-bg); border-color: rgba(29, 78, 216, .2); color: var(--pai-info); }

/* =====================================================================
 * Command palette (Ctrl+K) and density switch - built by pai.js
 * ===================================================================== */
.pai-cmd-trigger {
  display: inline-flex; align-items: center; gap: 8px; height: 32px; min-width: 240px; padding: 0 8px 0 10px;
  border-radius: var(--pai-radius-sm); border: 1px solid var(--pai-line); background: var(--pai-surface-2);
  color: var(--pai-ink-3); font: 500 12.5px var(--pai-font); cursor: pointer; text-align: left;
}
.pai-cmd-trigger:hover { border-color: var(--pai-line-strong); color: var(--pai-ink-2); }
.pai-cmd-trigger svg { width: 15px; height: 15px; flex: 0 0 15px; }
.pai-cmd-trigger span { flex: 1; }
.pai-cmd-trigger kbd, .pai-cmd kbd {
  font: 600 10.5px var(--pai-font); padding: 1px 5px; border-radius: 4px;
  border: 1px solid var(--pai-line-strong); background: var(--pai-surface); color: var(--pai-ink-3); box-shadow: none;
}
.pai-cmd-trigger--dark { background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .12); color: rgba(255, 255, 255, .62); }
.pai-cmd-trigger--dark:hover { border-color: rgba(255, 255, 255, .25); color: #fff; }
.pai-cmd-trigger--dark kbd { background: transparent; border-color: rgba(255, 255, 255, .2); color: rgba(255, 255, 255, .6); }

.pai-cmd-backdrop { position: fixed; inset: 0; z-index: 3000; background: rgba(15, 27, 45, .38); display: none; align-items: flex-start; justify-content: center; padding: 12vh 16px 16px; }
.pai-cmd-backdrop.is-open { display: flex; }
.pai-cmd { width: 100%; max-width: 580px; background: var(--pai-surface); border-radius: 12px; box-shadow: var(--pai-shadow-pop); overflow: hidden; font-family: var(--pai-font); }
.pai-cmd__input { display: flex; align-items: center; gap: 10px; padding: 0 14px; border-bottom: 1px solid var(--pai-line); }
.pai-cmd__input svg { width: 18px; height: 18px; color: var(--pai-ink-3); flex: 0 0 18px; }
.pai-cmd__input input { flex: 1; height: 50px; border: 0; outline: none; background: transparent; font: 500 15px var(--pai-font); color: var(--pai-ink); box-shadow: none; padding: 0; }
.pai-cmd__list { max-height: 52vh; overflow-y: auto; padding: 6px; margin: 0; list-style: none; }
.pai-cmd__group { padding: 8px 10px 4px; font-size: 10.5px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--pai-ink-3); }
.pai-cmd__item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: var(--pai-radius-sm); color: var(--pai-ink); font-size: 13.5px; cursor: pointer; text-decoration: none; }
.pai-cmd__item small { margin-left: auto; color: var(--pai-ink-3); font-size: 11.5px; white-space: nowrap; }
.pai-cmd__item.is-active, .pai-cmd__item:hover { background: var(--pai-primary-soft); color: var(--pai-primary-strong); text-decoration: none; }
.pai-cmd__icon { width: 26px; height: 26px; border-radius: 6px; display: grid; place-items: center; background: var(--pai-surface-2); border: 1px solid var(--pai-line); color: var(--pai-ink-3); flex: 0 0 26px; }
.pai-cmd__icon svg { width: 14px; height: 14px; }
.pai-cmd__empty { padding: 22px; text-align: center; color: var(--pai-ink-3); font-size: 13px; }
.pai-cmd__foot { display: flex; gap: 14px; padding: 8px 14px; border-top: 1px solid var(--pai-line); background: var(--pai-surface-2); font-size: 11.5px; color: var(--pai-ink-3); }

@media (max-width: 760px) {
  .pai-cmd-trigger { min-width: 0; width: 34px; padding: 0; justify-content: center; }
  .pai-cmd-trigger span, .pai-cmd-trigger kbd { display: none; }
}