/* ==========================================================================
   Budget Controller — FLASHBANG (light) / WITNESS PROTECT (dark)
   UI chrome variables follow CJ's shared toggle convention; viz-* tokens are
   the validated dataviz reference palette stepped per mode.
   ========================================================================== */

:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --text: #1d1d1f;
  --text-muted: #86868b;
  --surface: #ffffff;
  --surface-2: #fafafa;
  --surface-hover: #f9f9fb;
  --border: #e5e5ea;
  --border-soft: #f0f0f3;
  --chip-border: #d2d2d7;
  --accent: #007aff;
  --accent-bg: #007aff;
  --accent-hover: #f0f7ff;
  --high: #ff3b30;
  --med: #ff9500;
  --question: #af52de;
  --shadow: 0 0 0 transparent;

  /* dataviz tokens (light) */
  --viz-series: #2a78d6;
  --viz-series-soft: #9ec5f4;
  --viz-ink: #0b0b0b;
  --viz-ink-2: #52514e;
  --viz-muted: #898781;
  --viz-grid: #e1e0d9;
  --viz-baseline: #c3c2b7;
  --viz-good: #0ca30c;
  --viz-good-text: #006300;
  --viz-warning: #fab219;
  --viz-critical: #d03b3b;
}
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0a0c;
  --text: #f2f2f4;
  --text-muted: #8e8e93;
  --surface: #18181b;
  --surface-2: #1f1f23;
  --surface-hover: #232328;
  --border: #2a2a30;
  --border-soft: #232328;
  --chip-border: #3a3a40;
  --accent: #0a84ff;
  --accent-bg: #0a84ff;
  --accent-hover: #1a2a3f;
  --high: #ff453a;
  --med: #ff9f0a;
  --question: #bf5af2;
  --shadow: 0 1px 0 rgba(255,255,255,0.02) inset;

  --viz-series: #3987e5;
  --viz-series-soft: #1c5cab;
  --viz-ink: #ffffff;
  --viz-ink-2: #c3c2b7;
  --viz-muted: #898781;
  --viz-grid: #2c2c2a;
  --viz-baseline: #383835;
  --viz-good: #0ca30c;
  --viz-good-text: #0ca30c;
  --viz-warning: #fab219;
  --viz-critical: #d03b3b;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.45;
  transition: background 0.2s ease, color 0.2s ease;
}
a { color: var(--accent); text-decoration: none; }
button { font-family: inherit; }

/* --- top bar ------------------------------------------------------------ */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1100px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 22px;
}
.brand { font-weight: 700; font-size: 16px; color: var(--text); display: flex; gap: 8px; align-items: center; }
.nav { display: flex; gap: 4px; flex: 1; }
.nav a {
  color: var(--text-muted); font-weight: 500; padding: 6px 12px; border-radius: 8px;
}
.nav a:hover { color: var(--text); background: var(--surface-hover); }
.nav a.active { color: var(--text); background: var(--surface-2); border: 1px solid var(--border-soft); padding: 5px 11px; }
.topbar-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.theme-toggle {
  display: inline-flex; align-items: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 999px; padding: 3px; cursor: pointer; flex-shrink: 0;
  box-shadow: var(--shadow);
}
.theme-toggle button {
  border: none; background: transparent; color: var(--text-muted);
  font-size: 11px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.theme-toggle button.active { background: var(--accent-bg); color: white; }
.theme-toggle button:not(.active):hover { color: var(--text); }

/* --- layout ------------------------------------------------------------- */
.app { max-width: 1100px; margin: 0 auto; padding: 24px 20px 80px; }
.loading-view { color: var(--text-muted); padding: 60px 0; text-align: center; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px; box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 4px; font-size: 15px; font-weight: 650; }
.card .sub { color: var(--text-muted); font-size: 13px; margin: 0 0 14px; }

.grid { display: grid; gap: 16px; }
.grid.kpis { grid-template-columns: repeat(4, 1fr); }
.grid.two { grid-template-columns: 3fr 2fr; align-items: start; }
@media (max-width: 900px) {
  .grid.kpis { grid-template-columns: repeat(2, 1fr); }
  .grid.two { grid-template-columns: 1fr; }
}

/* --- page head / month picker ------------------------------------------- */
.page-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.page-head h1 { font-size: 22px; margin: 0; flex: 1; }
.month-picker { display: inline-flex; align-items: center; gap: 6px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 4px; }
.month-picker button {
  border: none; background: transparent; color: var(--text); font-size: 15px;
  width: 30px; height: 30px; border-radius: 7px; cursor: pointer;
}
.month-picker button:hover { background: var(--surface-hover); }
.month-picker .label { min-width: 130px; text-align: center; font-weight: 600; font-variant-numeric: tabular-nums; }

/* --- stat tiles ----------------------------------------------------------- */
.tile .k { color: var(--text-muted); font-size: 12.5px; font-weight: 600; letter-spacing: 0.3px; text-transform: uppercase; }
.tile .v { font-size: 34px; font-weight: 700; margin-top: 4px; letter-spacing: -0.5px; }
.tile .v.hero { font-size: 48px; }
.tile .d { font-size: 13px; color: var(--text-muted); margin-top: 2px; }
.delta-up   { color: var(--viz-critical); font-weight: 600; }  /* spending up = bad */
.delta-down { color: var(--viz-good-text); font-weight: 600; }

/* --- viz ------------------------------------------------------------------ */
.viz-svg { display: block; width: 100%; }
.viz-svg text { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }
.viz-grid-line { stroke: var(--viz-grid); stroke-width: 1; shape-rendering: crispEdges; }
.viz-baseline  { stroke: var(--viz-baseline); stroke-width: 1; shape-rendering: crispEdges; }
.viz-axis-label { fill: var(--viz-muted); font-size: 11px; }
.viz-value-label { fill: var(--viz-ink-2); font-size: 11.5px; font-variant-numeric: tabular-nums; }
.viz-cat-label { fill: var(--viz-ink-2); font-size: 12.5px; }
.viz-bar { fill: var(--viz-series); }
.viz-bar:hover { fill-opacity: 0.85; }
.viz-tooltip {
  position: fixed; z-index: 50; pointer-events: none;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 10px; font-size: 12.5px; box-shadow: 0 4px 14px rgba(0,0,0,0.12);
  max-width: 260px;
}
.viz-tooltip .t-title { font-weight: 650; }
.viz-tooltip .t-sub { color: var(--text-muted); }
.viz-empty { color: var(--text-muted); font-size: 13.5px; padding: 26px 0; text-align: center; }

/* budget meters */
.meter-row { display: grid; grid-template-columns: 130px 1fr auto; gap: 10px; align-items: center; padding: 7px 0; }
.meter-row .m-label { color: var(--viz-ink-2); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.meter-track { height: 10px; border-radius: 5px; background: var(--viz-grid); overflow: hidden; }
.meter-fill { height: 100%; border-radius: 5px; background: var(--viz-series); transition: width 0.3s ease; }
.meter-fill.warn { background: var(--viz-warning); }
.meter-fill.over { background: var(--viz-critical); }
.meter-row .m-value { font-size: 12.5px; color: var(--text-muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.meter-row .m-value .flag { font-weight: 700; }
.meter-row .m-value .flag.over { color: var(--viz-critical); }
.meter-row .m-value .flag.warn { color: var(--med); }

/* suggestions */
.suggestion { display: flex; gap: 10px; padding: 10px 0; border-top: 1px solid var(--border-soft); }
.suggestion:first-of-type { border-top: none; }
.suggestion .s-icon { flex-shrink: 0; }
.suggestion .s-title { font-weight: 620; font-size: 13.5px; }
.suggestion .s-detail { color: var(--text-muted); font-size: 13px; }
.ai-badge { font-size: 10.5px; font-weight: 700; letter-spacing: 0.4px; color: var(--question); border: 1px solid currentColor; padding: 1px 6px; border-radius: 999px; vertical-align: 2px; }

/* --- buttons / forms ------------------------------------------------------ */
.btn {
  background: var(--accent-bg); color: #fff; border: none; border-radius: 9px;
  padding: 9px 16px; font-size: 14px; font-weight: 600; cursor: pointer;
}
.btn:hover { filter: brightness(1.06); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn.secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn.danger { background: transparent; color: var(--high); border: 1px solid var(--high); }
.ghost-btn {
  background: transparent; border: none; color: var(--text-muted);
  font-size: 13px; cursor: pointer; padding: 6px 8px; border-radius: 7px;
}
.ghost-btn:hover { color: var(--text); background: var(--surface-hover); }

label.field { display: block; margin-bottom: 12px; }
label.field .fl { display: block; font-size: 12.5px; font-weight: 600; color: var(--text-muted); margin-bottom: 5px; }
input[type="text"], input[type="email"], input[type="password"], input[type="date"], input[type="number"], select {
  width: 100%; padding: 9px 11px; font-size: 14px; font-family: inherit;
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 9px; outline: none;
}
input:focus, select:focus { border-color: var(--accent); }
.form-error { color: var(--high); font-size: 13px; margin: 8px 0 0; min-height: 18px; }

/* --- auth ----------------------------------------------------------------- */
.auth-wrap { max-width: 400px; margin: 8vh auto 0; }
.auth-wrap .brand-big { font-size: 40px; text-align: center; margin-bottom: 6px; }
.auth-wrap h1 { text-align: center; font-size: 20px; margin: 0 0 4px; }
.auth-wrap .sub { text-align: center; color: var(--text-muted); font-size: 13.5px; margin-bottom: 22px; }
.auth-switch { text-align: center; font-size: 13.5px; color: var(--text-muted); margin-top: 14px; }

/* --- upload zone ----------------------------------------------------------- */
.dropzone {
  border: 1.5px dashed var(--chip-border); border-radius: 14px;
  padding: 26px; text-align: center; color: var(--text-muted);
  background: var(--surface-2); cursor: pointer; transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover { border-color: var(--accent); background: var(--accent-hover); color: var(--text); }
.dropzone strong { color: var(--text); }

/* --- receipts list ---------------------------------------------------------- */
.receipt-row {
  display: grid; grid-template-columns: 44px 1fr auto; gap: 14px; align-items: center;
  padding: 12px 6px; border-top: 1px solid var(--border-soft); cursor: pointer; border-radius: 10px;
}
.receipt-row:hover { background: var(--surface-hover); }
.receipt-row .r-emoji { width: 44px; height: 44px; border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border-soft); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.receipt-row .r-merchant { font-weight: 620; }
.receipt-row .r-meta { color: var(--text-muted); font-size: 12.5px; }
.receipt-row .r-total { font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.receipt-row .r-status { font-size: 11.5px; text-align: right; }
.badge { display: inline-block; font-size: 11px; font-weight: 650; letter-spacing: 0.3px; border-radius: 999px; padding: 2px 8px; }
.badge.processing { color: var(--med); border: 1px solid currentColor; }
.badge.failed { color: var(--high); border: 1px solid currentColor; }
.badge.demo { color: var(--question); border: 1px solid currentColor; }
.badge.lang { color: var(--text-muted); border: 1px solid var(--chip-border); text-transform: uppercase; }

/* --- receipt detail ----------------------------------------------------------- */
.detail-grid { display: grid; grid-template-columns: 320px 1fr; gap: 16px; align-items: start; }
@media (max-width: 900px) { .detail-grid { grid-template-columns: 1fr; } }
.receipt-img { width: 100%; border-radius: 10px; border: 1px solid var(--border); }
table.items { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.items th { text-align: left; color: var(--text-muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.4px; padding: 6px 8px; border-bottom: 1px solid var(--border); }
table.items td { padding: 7px 8px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
table.items td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.items .raw { color: var(--text-muted); font-size: 12px; }
table.items select { padding: 4px 6px; font-size: 12.5px; width: auto; }
.totals-row td { font-weight: 700; border-bottom: none; }

/* --- settings ------------------------------------------------------------------ */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
@media (max-width: 900px) { .settings-grid { grid-template-columns: 1fr; } }
.key-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-top: 1px solid var(--border-soft); }
.key-row:first-of-type { border-top: none; }
.key-row .k-name { font-weight: 620; min-width: 90px; }
.key-row .k-meta { color: var(--text-muted); font-size: 12.5px; flex: 1; }
.budget-edit { display: grid; grid-template-columns: 1fr 110px; gap: 8px; align-items: center; padding: 4px 0; }
.budget-edit .b-label { font-size: 13.5px; color: var(--viz-ink-2); }
.invite-code { font-size: 24px; font-weight: 700; letter-spacing: 2px; text-align: center; padding: 12px; background: var(--surface-2); border: 1px dashed var(--chip-border); border-radius: 10px; margin: 10px 0; user-select: all; }

/* --- toast ------------------------------------------------------------------------ */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 18px; font-size: 13.5px; z-index: 60;
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}
.toast.error { border-color: var(--high); color: var(--high); }

.muted { color: var(--text-muted); }
.mono { font-variant-numeric: tabular-nums; }
.mt { margin-top: 14px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }