:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #6b7683;
  --border: #d9dfe6;
  --accent: #2f6fed;
  --accent-dark: #2456c4;
  --danger: #d64545;
  --ok: #2e8b57;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 8px 24px rgba(16, 24, 40, .06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --card: #1b2129;
    --text: #e6ebf1;
    --muted: #97a3b1;
    --border: #2d3742;
    --accent: #5b8def;
    --accent-dark: #3f6fd8;
    --danger: #ef6a6a;
    --shadow: 0 1px 3px rgba(0, 0, 0, .35), 0 10px 30px rgba(0, 0, 0, .25);
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

main { max-width: 1040px; margin: 0 auto; padding: 24px 20px 64px; }

/* ------------------------------ topbar ------------------------------ */

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .2px;
  white-space: nowrap;
}
.brand .logo { width: 27px; height: 27px; flex: none; }
.spacer { flex: 1; }
.whoami { color: var(--muted); font-size: 14px; }

/* ------------------------------- auth ------------------------------- */

.auth-wrap {
  display: flex;
  justify-content: center;
  padding-top: 9vh;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 28px 32px 32px;
  width: 100%;
  max-width: 400px;
}
.card h1 {
  margin: 0 0 4px;
  font-size: 26px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card h1 .logo { width: 33px; height: 33px; flex: none; }
.subtitle { margin: 0 0 20px; color: var(--muted); font-size: 14px; }

.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 4px;
  margin-bottom: 18px;
}
.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 7px 0;
  border-radius: 6px;
  cursor: pointer;
}
.tab.active { background: var(--card); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.12); }

form label {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}
input[type="text"],
input[type="email"],
input[type="password"] {
  display: block;
  width: 100%;
  margin-top: 5px;
  padding: 9px 11px;
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }

/* ------------------------------ buttons ----------------------------- */

.btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
}
.btn:hover { border-color: var(--muted); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  padding: 10px 14px;
}
.btn.primary:hover { background: var(--accent-dark); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, transparent); }
.btn.danger:hover { background: color-mix(in srgb, var(--danger) 10%, transparent); }
.btn.small { padding: 4px 9px; font-size: 12.5px; border-radius: 7px; }
.btn.wide { width: 100%; margin-top: 6px; }

/* ------------------------------ dropzone ---------------------------- */

.app-wrap { display: flex; flex-direction: column; gap: 20px; }

#dropzone {
  border: 2px dashed var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 34px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .12s, background .12s;
  outline: none;
}
#dropzone:hover, #dropzone:focus-visible { border-color: var(--accent); }
#dropzone.drag {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--card));
}
.dz-title { margin: 0 0 6px; font-size: 16px; font-weight: 650; }
.dz-hint { margin: 0; color: var(--muted); font-size: 13.5px; }

/* ------------------------------ messages ---------------------------- */

.status { color: var(--ok); font-size: 14px; margin: 0; }
.error {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  border-radius: 9px;
  padding: 10px 13px;
  font-size: 14px;
  margin: 0;
}
.empty { color: var(--muted); font-size: 14px; }

/* ------------------------------ columns ----------------------------- */

.columns {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  align-items: start;
}
@media (max-width: 760px) { .columns { grid-template-columns: 1fr; } }

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  min-width: 0;
}
.panel h2 { margin: 0 0 12px; font-size: 15px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }

#upload-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
#upload-list li { display: flex; align-items: stretch; gap: 8px; }

.upload-item {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  text-align: left;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 9px 12px;
  font: inherit;
  cursor: pointer;
}
.upload-item:hover { border-color: var(--accent); }
.up-name { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.up-meta { color: var(--muted); font-size: 12px; }

/* ------------------------------ rows table -------------------------- */

.table-wrap { overflow: auto; max-height: 62vh; border: 1px solid var(--border); border-radius: 9px; }

table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
thead th {
  position: sticky;
  top: 0;
  background: var(--bg);
  text-align: left;
  font-weight: 650;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody td {
  padding: 6px 12px;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
  white-space: nowrap;
  max-width: 380px;
  overflow: hidden;
  text-overflow: ellipsis;
}
tbody tr:nth-child(even) { background: color-mix(in srgb, var(--bg) 45%, transparent); }
td.truncated { text-align: center; color: var(--muted); font-style: italic; }

/* ------------------------------ nav -------------------------------- */

.main-nav { display: flex; gap: 4px; margin-left: 18px; }
.nav-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 7px 13px;
  border-radius: 8px;
  cursor: pointer;
}
.nav-btn:hover { color: var(--text); background: color-mix(in srgb, var(--text) 7%, transparent); }
.nav-btn.active { color: var(--text); background: color-mix(in srgb, var(--text) 10%, transparent); }

/* ------------------------------ views ------------------------------ */

.view-head { margin: 6px 0 18px; }
.view-head h1 { margin: 0 0 2px; font-size: 24px; }
.view-sub { margin: 0; }

/* ------------------------------ stats ------------------------------ */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.card.stat { padding: 18px 20px; }
.stat-value { font-size: 22px; font-weight: 700; }
.stat-label { margin-top: 3px; color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; }

.report-cols { margin-bottom: 20px; }

/* ------------------------------ bars ------------------------------- */

.bars { display: flex; flex-direction: column; gap: 13px; }
.bar-row { display: flex; flex-direction: column; gap: 4px; }
.bar-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.bar-label {
  border: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 13.5px;
  font-weight: 600;
  text-align: left;
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bar-label:hover { text-decoration: underline; }
.bar-amt { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.bar-track { background: color-mix(in srgb, var(--bg) 70%, transparent); border-radius: 999px; height: 9px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); border-radius: 999px; }

/* --------------------------- merchants ------------------------------ */

.merchants { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.merchant-row { display: grid; grid-template-columns: 1fr auto auto; gap: 10px; align-items: baseline; }
.merchant-name { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.merchant-meta { color: var(--muted); font-size: 12px; white-space: nowrap; }
.merchant-amt { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* --------------------------- transactions --------------------------- */

.tx-filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin-bottom: 14px; }
.tx-filters label { font-size: 12.5px; font-weight: 600; color: var(--muted); }
.tx-filters label.grow { flex: 1; min-width: 200px; }
.tx-filters select, .tx-filters input[type="search"] {
  display: block;
  margin-top: 4px;
  padding: 8px 10px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
}
.tx-filters select { min-width: 150px; }
.tx-filters .grow input { width: 100%; }

.tx-wrap { overflow: auto; }
.tx-wrap thead th { white-space: nowrap; }
.tx-desc { min-width: 200px; white-space: normal; max-width: 420px; }
.muted-td { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.amount { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.amount.pos { color: var(--ok); }
.amount.neg { color: var(--danger); }

td.cat-cell { white-space: nowrap; }
.cat-input {
  width: 150px;
  padding: 5px 8px;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 7px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.cat-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.cat-input.saved { border-color: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 18%, transparent); }
.cat-input.save-error { border-color: var(--danger); }

.badge {
  display: inline-block;
  margin-left: 7px;
  padding: 2px 7px;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .4px;
  border-radius: 999px;
  vertical-align: middle;
}
.refund-badge {
  color: #0e7490;
  background: color-mix(in srgb, #06b6d4 18%, transparent);
  border: 1px solid color-mix(in srgb, #06b6d4 45%, transparent);
}
@media (prefers-color-scheme: dark) {
  .refund-badge { color: #67e8f9; }
}

.month-panel { margin-top: 20px; }

/* item action buttons inside upload rows */
.item-actions { display: flex; flex-direction: column; justify-content: center; gap: 6px; }

/* ------------------------------ timeline --------------------------- */

.timeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 2px 0 16px;
  padding: 10px 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 11px;
}
.tl-label { color: var(--muted); font-size: 12.5px; font-weight: 600; text-transform: uppercase; letter-spacing: .4px; }
.timeline select,
.timeline input[type="date"] {
  padding: 6px 9px;
  font: inherit;
  font-size: 13.5px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
}
.timeline select { min-width: 150px; }
.timeline .btn.small { padding: 6px 10px; }

/* --------------------------- category drill-down -------------------- */

.bar-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: baseline;
}
.bar-toggle {
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  padding: 0 2px;
  cursor: pointer;
}
.bar-toggle:hover { color: var(--text); }

.cat-merchants {
  margin: 6px 0 4px 18px;
  padding: 6px 4px 2px 12px;
  border-left: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.merchant-sub {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: baseline;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text);
  font: inherit;
  font-size: 13px;
  padding: 2px 0;
  cursor: pointer;
}
.merchant-sub:hover .merchant-name,
.merchant-sub:hover,
.merchant-btn:hover .merchant-name,
.merchant-btn:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.merchant-row .merchant-btn {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: baseline;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text);
  font: inherit;
  padding: 0;
  cursor: pointer;
}
.merchant-btn { font-weight: 600; font-size: 14px; }
.merchant-btn .merchant-meta,
.merchant-btn .merchant-amt { font-weight: 400; font-size: 12px; }
.merchant-btn .merchant-amt { font-size: 13px; }

/* ------------------------------ month table ------------------------- */

/* ------------------------------ feedback modal ---------------------- */

textarea {
  display: block;
  width: 100%;
  margin-top: 5px;
  padding: 9px 11px;
  font: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  resize: vertical;
  min-height: 130px;
  line-height: 1.45;
}
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(10, 14, 20, .55);
  backdrop-filter: blur(2px);
}
.modal-overlay[hidden] { display: none; }
.modal { max-width: 540px; max-height: 92vh; overflow: auto; }
.modal h2 { margin: 0 0 2px; }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

/* ------------------------------ sharing ----------------------------- */

.share-list { list-style: none; margin: 8px 0 0; padding: 0; }
.share-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line, #e5e9f0);
  font-size: 14px;
}
.share-list li:last-child { border-bottom: none; }
.share-user { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.share-role { color: var(--muted, #667); font-size: 12.5px; }
.share-edit-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0 0;
  font-size: 14px;
  cursor: pointer;
}
.share-edit-label input { width: auto; }
.shared-tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(47, 111, 237, .12);
  color: var(--accent, #2f6fed);
  font-size: 12px;
  margin-left: 8px;
}
.shared-owner { color: var(--muted, #667); font-size: 12.5px; margin-left: 8px; }
.cat-input[disabled] { opacity: .55; cursor: not-allowed; }

/* ------------------------------ narrow screens ---------------------- */

@media (max-width: 680px) {
  .topbar {
    flex-wrap: wrap;
    row-gap: 6px;
    padding: 10px 14px;
  }
  .main-nav {
    order: 5;
    width: 100%;
    margin-left: 0;
    justify-content: center;
  }
  .brand { font-size: 15.5px; }
  .brand .logo { width: 24px; height: 24px; }
}