@import url("https://fonts.googleapis.com/css?family=Ruda:400,500,700&subset=latin,latin-ext");

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #444444;
  --ink-soft: #666666;
  --ink-faint: #888888;
  --paper: #ffffff;
  --paper-warm: #f2f2f2;
  --surface: #ffffff;
  --accent: #007a8f;
  --accent-lt: #e6f4f6;
  --gold: #f18e00;
  --gold-lt: #fff6e8;
  --danger: #cc0000;
  --green: #62a400;
  --border: #dddddd;
  --border-lt: #eeeeee;
  --shadow: 0 2px 12px rgba(0, 122, 143, .08);
  --shadow-lg: 0 8px 32px rgba(0, 122, 143, .12);
  --radius: 10px;
  font-size: 15px;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: Ruda, "Segoe UI", system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 200;
  padding: 8px 12px;
  background: var(--accent);
  color: #fff;
}
.skip:focus { left: 8px; }

.page-wrap {
  width: 100%;
  max-width: 1100px;
  flex: 1;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.site-header {
  position: relative;
  overflow: hidden;
  margin-bottom: 28px;
  padding: 36px 40px 32px;
  background: var(--accent);
  color: #fff;
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent, transparent 30px, rgba(255,255,255,.02) 30px, rgba(255,255,255,.02) 60px);
}
.site-header .inner {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
}
.site-header .kicker {
  margin-bottom: 6px;
  color: rgba(255,255,255,.45);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.site-header h1 { font-size: 2.15rem; font-weight: 500; line-height: 1.1; }
.site-header .subtitle { margin-top: 6px; color: rgba(255,255,255,.65); font-size: .95rem; }
.site-header .meta { color: rgba(255,255,255,.55); font-size: .82rem; text-align: right; white-space: nowrap; }
.site-header .meta strong { display: block; color: rgba(255,255,255,.95); font-size: 1.05rem; margin-bottom: 2px; }

.crumb { margin: 0 0 22px; color: var(--ink-faint); font-size: .85rem; }
.crumb a { color: var(--accent); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }

.sticky-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  margin: 0 -20px 28px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
}
.sticky-nav .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
  font: inherit;
  font-size: .83rem;
  font-weight: 500;
  text-decoration: none;
  transition: all .15s;
}
.nav-btn:hover { border-color: var(--accent); background: var(--accent-lt); color: var(--accent); }
.nav-btn.active { border-color: var(--accent); background: var(--accent); color: #fff; }
.nav-btn.disabled { opacity: .4; pointer-events: none; cursor: default; }
.nav-sep { flex: 1; }

.search-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
}
.search-wrap input {
  width: 190px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: .85rem;
}
.search-wrap input::placeholder { color: var(--ink-faint); }

.nav-hint {
  margin-bottom: 16px;
  padding: 10px 14px;
  border: 1px solid #ead7a8;
  border-radius: var(--radius);
  background: var(--gold-lt);
  color: var(--ink-soft);
  font-size: .88rem;
}

.inst-grid, .month-grid { display: grid; gap: 16px; margin-bottom: 40px; }
.inst-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.month-grid { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.inst-card, .month-tile {
  display: block;
  border: 1px solid var(--border-lt);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: inherit;
  text-decoration: none;
  transition: box-shadow .2s, transform .15s;
}
.inst-card { padding: 22px; border-top: 4px solid var(--inst, var(--accent)); }
.inst-card:hover, .month-tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.inst-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--inst, var(--accent)) 12%, white);
  color: var(--inst, var(--accent));
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.inst-card h2 { font-size: 1.25rem; font-weight: 500; }
.month-tile { overflow: hidden; }
.month-tile.empty { opacity: .55; box-shadow: none; }
.month-tile.empty:hover { transform: none; box-shadow: none; }
.month-hit { display: block; padding: 16px 18px 8px; }
.month-name { font-size: 1.25rem; text-transform: capitalize; }
.month-total { margin-top: 3px; color: var(--accent); font-size: .92rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.month-empty { padding: 8px 18px 16px; color: var(--ink-faint); font-size: .8rem; font-style: italic; }
.chip-row { display: flex; gap: 6px; flex-wrap: wrap; padding: 0 18px 16px; }
.chip {
  padding: 3px 9px;
  border: 1px solid color-mix(in srgb, var(--inst) 25%, white);
  border-radius: 999px;
  background: color-mix(in srgb, var(--inst) 12%, white);
  color: var(--inst);
  font-size: .72rem;
  font-weight: 600;
  text-decoration: none;
}
.chip:hover { background: var(--inst); color: #fff; }

.month-switch { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0 16px;
  font-size: 1.35rem;
  font-weight: 500;
}
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--border); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 36px;
}
.stat-card {
  padding: 15px 22px;
  border: 1px solid var(--border-lt);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.stat-card .label { margin-bottom: 8px; color: var(--ink-faint); font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.stat-card .value { color: var(--ink); font-size: 1.8rem; line-height: 1; }
.stat-card .value.accent { color: var(--accent); }
.stat-card .value.gold { color: var(--gold); }
.stat-card .sub { margin-top: 4px; color: var(--ink-faint); font-size: .8rem; }

.summary-wrap {
  overflow: hidden;
  margin-bottom: 40px;
  border: 1px solid var(--border-lt);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.summary-table { width: 100%; border-collapse: collapse; }
.summary-table thead th { padding: 12px 18px; background: var(--accent); color: #fff; font-size: .75rem; letter-spacing: .07em; text-align: left; text-transform: uppercase; }
.summary-table thead th.right { text-align: right; }
.summary-table tbody tr { border-bottom: 1px solid var(--border-lt); }
.summary-table tbody tr:hover { background: var(--accent-lt); }
.summary-table td { padding: 11px 18px; font-size: .88rem; }
.summary-table td.right { text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; }
.summary-table td.count { color: var(--ink-faint); font-size: .82rem; text-align: right; }
.summary-table td.bar-cell { width: 160px; padding-right: 18px; }
.summary-table tfoot td { padding: 12px 18px; border-top: 2px solid var(--border); background: var(--paper-warm); font-weight: 600; }
.summary-table tfoot td.right { color: var(--accent); }
.bar { overflow: hidden; height: 6px; border-radius: 3px; background: var(--border); }
.bar-fill { height: 100%; border-radius: 3px; background: var(--accent); }
.sup-link { color: var(--ink); text-decoration: none; }
.sup-link:hover { color: var(--accent); text-decoration: underline; }

.invoice-grid { display: flex; flex-direction: column; gap: 16px; }
.invoice-card {
  overflow: hidden;
  border: 1px solid var(--border-lt);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.invoice-card:hover { box-shadow: var(--shadow-lg); }
.invoice-card.negative { border-left: 4px solid var(--danger); }
.invoice-card.positive { border-left: 4px solid var(--green); }
.invoice-card.zero { border-left: 4px solid var(--border); opacity: .75; }
.inv-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 22px 14px;
  cursor: pointer;
  user-select: none;
}
.inv-id { margin-bottom: 4px; color: var(--ink-faint); font-size: .78rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; }
.inv-supplier { font-size: 1rem; font-weight: 600; }
.inv-addr { margin-top: 2px; color: var(--ink-faint); font-size: .78rem; }
.inv-right { flex-shrink: 0; text-align: right; }
.inv-amount { font-size: 1.35rem; line-height: 1; }
.inv-amount.positive { color: var(--green); }
.inv-amount.negative { color: var(--danger); }
.inv-dates { margin-top: 4px; color: var(--ink-faint); font-size: .75rem; }
.inv-toggle { display: inline-block; margin-left: 8px; color: var(--ink-faint); font-size: .7rem; transition: transform .2s; }
.inv-toggle.open { transform: rotate(180deg); }
.inv-body { display: none; border-top: 1px solid var(--border-lt); }
.inv-body.open { display: block; }
.inv-meta { display: flex; gap: 24px; flex-wrap: wrap; padding: 12px 22px; border-bottom: 1px solid var(--border-lt); background: var(--paper-warm); color: var(--ink-soft); font-size: .8rem; }
.inv-meta span b { color: var(--ink); font-weight: 600; }
.detail-wrap { overflow-x: auto; padding: 16px 22px; }
.detail-table { width: 100%; border-collapse: collapse; font-size: .83rem; }
.detail-table thead th { padding: 0 10px 10px 0; border-bottom: 1px solid var(--border); color: var(--ink-faint); font-size: .72rem; letter-spacing: .06em; text-align: left; text-transform: uppercase; }
.detail-table thead th.right { padding-right: 0; text-align: right; }
.detail-table tbody tr { border-bottom: 1px solid var(--border-lt); }
.detail-table td { padding: 9px 5px 9px 0; color: var(--ink-soft); }
.detail-table td:first-child { color: var(--ink); }
.detail-table td.right { padding-right: 0; color: var(--ink); font-variant-numeric: tabular-nums; font-weight: 500; text-align: right; }
.detail-table td.right.neg { color: var(--danger); }
.detail-table td.right.pos { color: var(--green); }
.detail-table td.qty { color: var(--ink-faint); font-size: .8rem; }
.inv-subtotals { display: flex; justify-content: flex-end; gap: 24px; padding: 10px 22px 12px; border-top: 1px solid var(--border-lt); font-size: .82rem; }
.inv-subtotals .row { display: flex; align-items: center; gap: 8px; }
.inv-subtotals .lbl { color: var(--ink-faint); }
.inv-subtotals .val { font-variant-numeric: tabular-nums; font-weight: 600; }
.inv-subtotals .val.total { color: var(--accent); font-size: .95rem; }

.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 4px 16px rgba(0, 122, 143, .28);
  color: #fff;
  font-size: 1.1rem;
  opacity: 0;
  text-decoration: none;
  transform: translateY(10px);
  transition: opacity .2s, transform .2s;
}
.back-top.visible { opacity: 1; transform: translateY(0); }
.back-top:hover { background: var(--green); }
.hidden { display: none !important; }
.empty-msg { padding: 48px; color: var(--ink-faint); font-style: italic; text-align: center; }

.site-footer { margin-top: auto; border-top: 1px solid var(--border); background: var(--paper-warm); color: var(--ink-faint); font-size: .78rem; }
.site-footer .inner { max-width: 1100px; margin: 0 auto; padding: 16px 20px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media print {
  .sticky-nav, .back-top, .site-footer, .month-switch { display: none; }
  .inv-body { display: block !important; }
  .invoice-card { break-inside: avoid; }
}

@media (max-width: 640px) {
  .site-header { padding: 28px 20px; }
  .site-header h1 { font-size: 1.5rem; }
  .site-header .meta { text-align: left; }
  .inv-amount { font-size: 1.1rem; }
  .search-wrap input { width: 120px; }
  .hide-mobile { display: none !important; }
}