:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff4ff;
  --bg: #f3f5f9;
  --card: #ffffff;
  --border: #e3e7ee;
  --text: #1a1f2b;
  --muted: #6b7280;
  --red: #dc2626;
  --green: #16a34a;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
nav {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  box-shadow: 0 2px 10px rgba(29, 78, 216, 0.25);
}
nav a {
  color: rgba(255,255,255,0.92);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
nav a:hover { color: #fff; border-color: rgba(255,255,255,0.6); }
nav .brand { font-weight: 700; font-size: 17px; margin-right: 4px; white-space: nowrap; letter-spacing: -0.01em; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  margin-left: auto;
  padding: 4px 8px;
}
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.nav-group { position: relative; }
.nav-group summary { list-style: none; cursor: pointer; color: rgba(255,255,255,0.92); font-size: 14.5px; font-weight: 500; padding: 4px 2px; user-select: none; }
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary::after { content: " \25BE"; font-size: 11px; opacity: 0.8; }
.nav-group summary:hover, .nav-group[open] summary { color: #fff; }
.nav-group .dropdown { position: absolute; top: 100%; left: 0; background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 6px; min-width: 190px; box-shadow: 0 10px 24px rgba(0,0,0,0.18); z-index: 50; margin-top: 8px; }
.nav-group .dropdown a { display: block; color: var(--text); padding: 8px 10px; border-bottom: none; border-radius: 6px; font-weight: 500; }
.nav-group .dropdown a:hover { background: var(--primary-light); color: var(--primary); }

main {
  max-width: 1400px;
  margin: 28px auto;
  padding: 0 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
  margin-bottom: 18px;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.04), 0 1px 2px rgba(16, 24, 40, 0.03);
}
.card:has(table) { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.cards-row { display: flex; gap: 16px; flex-wrap: wrap; }
.cards-row .card { flex: 1; min-width: 180px; }
.stat-label { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; }
.stat-value { font-size: 27px; font-weight: 700; margin-top: 6px; letter-spacing: -0.01em; }
.positive { color: var(--green); }
.negative { color: var(--red); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.04em; background: #fafbfd; }
tr:hover { background: var(--primary-light); }
.filter-row th { background: #fff; padding: 6px 8px; }
.filter-row:hover { background: transparent; }
.col-filter { width: 100%; font-size: 12.5px; padding: 5px 7px; font-weight: 400; text-transform: none; letter-spacing: normal; }
form.inline { display: inline; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; align-items: end; }
label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 5px; font-weight: 500; }
input, select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px; /* 16px prevents iOS Safari auto-zoom on focus */
  background: white;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
input[type="file"] { padding: 8px 0; font-size: 13px; border: none; }
button, .btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  white-space: nowrap;
  transition: background 0.15s, transform 0.05s;
}
button:hover, .btn:hover { background: var(--primary-dark); }
button:active, .btn:active { transform: scale(0.98); }
button.danger, .btn.danger { background: var(--red); }
button.danger:hover, .btn.danger:hover { background: #b91c1c; }
button.secondary { background: #6b7280; }
button.secondary:hover { background: #4b5563; }
button:disabled { background: #cbd5e1; cursor: not-allowed; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; padding: 0; margin: 0;
  background: transparent; border: 1px solid var(--border); border-radius: 7px;
  color: #6b7280; text-decoration: none; cursor: pointer; vertical-align: middle;
}
.icon-btn svg { width: 15px; height: 15px; stroke: currentColor; }
.icon-btn:hover { background: #f1f3f5; color: #111827; border-color: #cbd5e1; }
.icon-btn:active { transform: scale(0.96); }
.quarter-nav a { margin-right: 10px; display: inline-block; padding: 4px 0; font-weight: 500; color: var(--text); }
.quarter-nav a.active { font-weight: 700; color: var(--primary); border-bottom: 2px solid var(--primary); }
h1 { font-size: 23px; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 16px; font-weight: 600; margin-top: 0; }
.muted { color: var(--muted); font-size: 13px; }
a { color: var(--primary); }

.fab {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 400;
  line-height: 1;
  padding-bottom: 3px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(29, 78, 216, 0.4);
  z-index: 100;
  transition: transform 0.1s;
}
.fab:active { transform: scale(0.94); }

/* --- Mobile --- */
@media (max-width: 720px) {
  nav { padding: 10px 12px; }
  .nav-toggle {
    display: block;
    flex-shrink: 0;
    order: 2;
  }
  .brand {
    flex: 1 1 auto;
    order: 1;
    min-width: 0;
    text-align: center;
    white-space: normal;
    font-size: 15px;
    line-height: 1.25;
  }
  .nav-links {
    display: none;
    order: 3;
    width: 100%;
    flex-direction: column;
    gap: 2px;
    align-items: stretch;
    border-top: 1px solid rgba(255,255,255,0.25);
    margin-top: 8px;
    padding-top: 8px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 4px; border-radius: 6px; border-bottom: none; }
  .nav-links a:hover { background: rgba(255,255,255,0.12); }
  .nav-group .dropdown { position: static; box-shadow: none; border: none; background: transparent; margin: 0 0 0 10px; padding: 0; }
  .nav-group .dropdown a { color: rgba(255,255,255,0.85); padding: 8px 4px; }
  .nav-group .dropdown a:hover { background: rgba(255,255,255,0.12); color: #fff; }

  main { margin: 12px auto; padding: 0 10px 80px; }
  .card { padding: 12px 14px; margin-bottom: 14px; }
  .cards-row { flex-direction: column; gap: 10px; }
  h1 { font-size: 19px; }
  h2 { font-size: 15px; }

  table { font-size: 12.5px; }
  th, td { padding: 7px 8px; }

  .form-grid { grid-template-columns: 1fr; }
  button, .btn { width: 100%; text-align: center; }
  form.inline button, form.inline .btn { width: auto; }

  .quarter-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; }
  .quarter-nav span { width: 100%; }
  .quarter-nav .btn { width: auto; }

  .fab { right: 16px; bottom: 16px; }
}