:root {
  --navy: #1f3864;
  --accent: #2e74b5;
  --accent-light: #eaf2fa;
  --grey: #f2f2f2;
  --grey-dark: #6b7280;
  --red: #c0392b;
  --green: #1e7d3b;
  --border: #e2e5ea;
  --radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #f7f8fa;
  color: #1c2430;
}

.topbar {
  background: var(--navy);
  color: white;
  padding: 14px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand { display: flex; flex-direction: column; }
.brand-mark { font-weight: 700; font-size: 20px; letter-spacing: 0.5px; }
.brand-sub { font-size: 12px; opacity: 0.75; }
.nav-link { color: white; text-decoration: none; font-size: 14px; opacity: 0.9; }
.nav-link:hover { opacity: 1; text-decoration: underline; }

.app {
  max-width: 1080px;
  margin: 28px auto;
  padding: 0 20px 60px;
}

h1 { font-size: 24px; margin: 0 0 6px; color: var(--navy); }
h2 { font-size: 18px; margin: 0 0 12px; color: var(--navy); }
.subtitle { color: var(--grey-dark); margin: 0 0 24px; font-size: 14px; }

.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 20px;
}

.row { display: flex; gap: 16px; flex-wrap: wrap; }
.col { flex: 1; min-width: 200px; }

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

button, .btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 600;
}
button:hover, .btn:hover { background: #24608f; }
button.secondary { background: white; color: var(--accent); border: 1px solid var(--accent); }
button.secondary:hover { background: var(--accent-light); }
button.danger { background: white; color: var(--red); border: 1px solid var(--red); }
button.danger:hover { background: #fdecea; }
button.small { padding: 5px 10px; font-size: 12px; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--grey-dark); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
tr:hover td { background: #fafbfc; }

.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.pill.mensuel { background: var(--accent-light); color: var(--accent); }
.pill.trimestriel { background: #f4ecfb; color: #7b3fa3; }
.pill.brouillon { background: var(--grey); color: var(--grey-dark); }
.pill.genere { background: #e7f6ec; color: var(--green); }

.empty { color: var(--grey-dark); font-style: italic; padding: 20px 0; text-align: center; }

label { display: block; font-size: 12.5px; color: var(--grey-dark); margin-bottom: 4px; font-weight: 600; }
input, select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 14px;
  margin-bottom: 14px;
  background: white;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 16px; }
.form-grid.two { grid-template-columns: repeat(2, 1fr); }

.breadcrumb { font-size: 13px; color: var(--grey-dark); margin-bottom: 10px; }
.breadcrumb a { color: var(--accent); text-decoration: none; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stat {
  background: white; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; text-align: center;
}
.stat .label { font-size: 12px; color: var(--grey-dark); text-transform: uppercase; letter-spacing: 0.4px; }
.stat .value { font-size: 22px; font-weight: 700; color: var(--navy); margin-top: 4px; }
.stat.due .value { color: var(--red); }
.stat.credit .value { color: var(--green); }

.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tab {
  padding: 9px 16px; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--grey-dark);
  border-bottom: 2px solid transparent;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.note {
  background: #fff8e6; border: 1px solid #f0deb4; color: #7a5c00;
  padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 16px;
}

.toast {
  position: fixed; bottom: 24px; right: 24px; background: var(--navy); color: white;
  padding: 12px 20px; border-radius: 8px; font-size: 14px; box-shadow: 0 4px 14px rgba(0,0,0,0.2);
  transition: opacity 0.3s;
}
.toast.error { background: var(--red); }
.toast.hidden { opacity: 0; pointer-events: none; }

.actions-cell { display: flex; gap: 6px; }