:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #253449;
  --accent: #6366f1;
  --accent-2: #818cf8;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: #334155;
  --green: #22c55e;
  --red: #f87171;
  --yellow: #fbbf24;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
}

#login-screen h1 { font-size: 22px; margin: 0 0 4px; }
#login-screen p { color: var(--text-dim); margin: 0; font-size: 14px; }

#login-form {
  display: flex;
  gap: 8px;
}

input, select, textarea {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

button:hover { background: var(--accent-2); }
button.secondary { background: var(--panel-2); border: 1px solid var(--border); }
button.secondary:hover { background: var(--border); }
button.danger { background: transparent; color: var(--red); padding: 4px 8px; }
button.danger:hover { background: rgba(248,113,113,0.15); }
button.icon { padding: 4px 8px; }

#login-error { color: var(--red); font-size: 13px; min-height: 18px; }

#app { display: none; min-height: 100vh; }
#app.visible { display: flex; }

nav#sidebar {
  width: 220px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
}

nav#sidebar h1 {
  font-size: 16px;
  padding: 0 20px 16px;
  margin: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

nav#sidebar .tab {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 20px;
  background: none;
  border: none;
  border-radius: 0;
  color: var(--text-dim);
  font-weight: 500;
  cursor: pointer;
}

nav#sidebar .tab:hover { background: var(--panel-2); color: var(--text); }
nav#sidebar .tab.active { background: var(--panel-2); color: var(--accent-2); border-left: 3px solid var(--accent); }

main {
  flex: 1;
  padding: 28px 32px;
  overflow-x: auto;
}

main h2 { margin-top: 0; font-size: 20px; }

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.grid-kpi {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.kpi {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}

.kpi .label { color: var(--text-dim); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.kpi .value { font-size: 22px; font-weight: 700; margin-top: 6px; }
.kpi.green .value { color: var(--green); }
.kpi.red .value { color: var(--red); }
.kpi.yellow .value { color: var(--yellow); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

th, td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th { color: var(--text-dim); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:hover { background: var(--panel-2); }

.pill {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.pill.pago { background: rgba(34,197,94,0.15); color: var(--green); }
.pill.pendente { background: rgba(248,113,113,0.15); color: var(--red); }

.subtabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.subtabs button.secondary.active { background: var(--accent); color: white; border-color: var(--accent); }

dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  width: 420px;
  max-width: 92vw;
}
dialog::backdrop { background: rgba(0,0,0,0.55); }
dialog h3 { margin-top: 0; }
.form-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.form-row label { font-size: 12px; color: var(--text-dim); }
.form-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.muted { color: var(--text-dim); }
.right { text-align: right; }

.empty { color: var(--text-dim); padding: 24px; text-align: center; }

@media (max-width: 760px) {
  #app.visible { flex-direction: column; }
  nav#sidebar { width: 100%; display: flex; overflow-x: auto; padding: 10px; }
  nav#sidebar h1 { display: none; }
  nav#sidebar .tab { white-space: nowrap; border-left: none; border-bottom: 3px solid transparent; }
  nav#sidebar .tab.active { border-left: none; border-bottom: 3px solid var(--accent); }
  main { padding: 18px; }
}