:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --ink: #1f2733;
  --muted: #6b7280;
  --border: #e5e7eb;
  --thead: #fafbfc;
  --brand: #1f93ff;
  --mkt: #8b5cf6;
  --util: #0ea5e9;
  --serv: #10b981;
}

/* Tema oscuro segun preferencia del sistema */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a;
    --card: #1a212b;
    --ink: #e6e9ee;
    --muted: #9aa4b2;
    --border: #2a3340;
    --thead: #202a36;
    --brand: #3b9eff;
    --mkt: #a78bfa;
    --util: #38bdf8;
    --serv: #34d399;
  }
}

* { box-sizing: border-box; }

:root { color-scheme: light dark; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
}

.hidden { display: none !important; }

/* Estados */
.state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 70vh;
  text-align: center;
  color: var(--muted);
  padding: 24px;
}
.state h2 { color: var(--ink); margin: 0; }
.lock { font-size: 40px; }
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; background: var(--card); border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 18px; margin: 0; }
.controls { display: flex; gap: 8px; align-items: center; }

input[type="month"] {
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; font-size: 14px;
}

.btn {
  background: var(--brand); color: #fff; border: none; border-radius: 8px;
  padding: 8px 14px; cursor: pointer; font-size: 14px;
}
.btn:hover { filter: brightness(0.95); }
.btn-icon { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--muted); }
.btn-link { background: none; border: none; color: var(--brand); cursor: pointer; font-size: 13px; }

/* Cards */
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px; padding: 20px;
}
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; display: flex; flex-direction: column; gap: 4px;
}
.card-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.card-value { font-size: 24px; font-weight: 700; }
.card-sub { font-size: 12px; color: var(--muted); }
.cat-marketing { border-left: 3px solid var(--mkt); }
.cat-utility { border-left: 3px solid var(--util); }
.cat-service { border-left: 3px solid var(--serv); }

/* Tabla */
.table-wrap { padding: 0 20px 24px; }
.table-wrap h2 { font-size: 15px; }
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 12px; overflow: hidden; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { font-size: 12px; color: var(--muted); text-transform: uppercase; background: var(--thead); }
td.num, th.num { text-align: right; }
td.strong { font-weight: 700; }
tbody tr:last-child td { border-bottom: none; }
.empty { color: var(--muted); text-align: center; padding: 24px; }

/* Tags */
.tag { padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; color: #fff; }
.tag-marketing { background: var(--mkt); }
.tag-utility { background: var(--util); }
.tag-service { background: var(--serv); }

/* Modal */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 50;
}
.modal-box {
  background: var(--card); border-radius: 14px; width: 100%; max-width: 720px;
  max-height: 85vh; display: flex; flex-direction: column; overflow: hidden;
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.modal-head h3 { margin: 0; font-size: 16px; }
.modal-body { overflow: auto; padding: 0; }
.modal-body table { border-radius: 0; }