:root {
  --bg: #0f1420;
  --surface: #171d2b;
  --surface-2: #1f2637;
  --border: #2a3244;
  --text: #e8ebf2;
  --text-dim: #9aa4b8;
  --accent: #4f7cff;
  --accent-dim: #2d3d63;
  --success: #2fbf71;
  --success-bg: rgba(47,191,113,0.12);
  --warning: #e6b93d;
  --warning-bg: rgba(230,185,61,0.12);
  --danger: #e35b5b;
  --danger-bg: rgba(227,91,91,0.12);
  --radius: 10px;
}

* { 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;
}

a { color: var(--accent); text-decoration: none; }

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 380px;
}

.brand {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.brand span { color: var(--accent); }
.subtitle { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 1.75rem; }

label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 1rem 0 0.35rem;
}
input, select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  color: var(--text);
  font-size: 0.95rem;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.1rem;
  transition: opacity 0.15s;
}
button:hover { opacity: 0.88; }
button.primary { background: var(--accent); color: white; width: 100%; margin-top: 1.5rem; }
button.secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
button.danger { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.msg { font-size: 0.85rem; margin-top: 1rem; padding: 0.6rem 0.8rem; border-radius: 8px; }
.msg.error { background: var(--danger-bg); color: var(--danger); }
.msg.success { background: var(--success-bg); color: var(--success); }

.link-row { text-align: center; margin-top: 1.25rem; font-size: 0.85rem; color: var(--text-dim); }

/* App shell */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
}
.sidebar .brand { padding: 0 0.5rem; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: 0.25rem;
}
.nav-item:hover { background: var(--surface-2); color: var(--text); }
.nav-item.active { background: var(--accent-dim); color: var(--text); }
.sidebar-footer { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--border); }
.user-chip { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 0.6rem; }
.user-chip b { color: var(--text); display: block; }

.main { flex: 1; padding: 2rem 2.5rem; overflow-y: auto; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.page-header h1 { font-size: 1.35rem; margin: 0; }
.page-header p { color: var(--text-dim); font-size: 0.88rem; margin: 0.2rem 0 0; }

.cards-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.75rem; }
.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}
.metric-card .label { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 0.4rem; }
.metric-card .value { font-size: 1.5rem; font-weight: 700; }
.metric-card .value.success { color: var(--success); }
.metric-card .value.warning { color: var(--warning); }
.metric-card .value.danger { color: var(--danger); }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}
.panel h2 { font-size: 1rem; margin: 0 0 1rem; }
.panel .panel-actions { display: flex; gap: 0.6rem; }

table { width: 100%; border-collapse: collapse; font-size: 0.87rem; }
th { text-align: left; color: var(--text-dim); font-weight: 500; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
td { padding: 0.65rem 0.6rem; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr.clickable { cursor: pointer; }
tr.clickable:hover { background: var(--surface-2); }

.badge { display: inline-block; font-size: 0.76rem; font-weight: 600; padding: 0.25rem 0.65rem; border-radius: 999px; }
.badge.ok { background: var(--success-bg); color: var(--success); }
.badge.alerta { background: var(--warning-bg); color: var(--warning); }
.badge.critico { background: var(--danger-bg); color: var(--danger); }
.badge.sin_datos { background: var(--surface-2); color: var(--text-dim); }
.badge.warning { background: var(--warning-bg); color: var(--warning); }
.badge.critical { background: var(--danger-bg); color: var(--danger); }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.75rem; width: 100%; max-width: 460px; max-height: 85vh; overflow-y: auto;
}
.modal h2 { margin-top: 0; font-size: 1.1rem; }
.modal-actions { display: flex; gap: 0.6rem; justify-content: flex-end; margin-top: 1.5rem; }
.hidden { display: none !important; }

.checkbox-row { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.5rem; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; color: var(--text); font-size: 0.88rem; }

.empty-state { text-align: center; color: var(--text-dim); padding: 2.5rem 1rem; font-size: 0.9rem; }

.tabs { display: flex; gap: 0.4rem; margin-bottom: 1.25rem; border-bottom: 1px solid var(--border); }
.tab { padding: 0.6rem 1rem; font-size: 0.88rem; color: var(--text-dim); cursor: pointer; border-bottom: 2px solid transparent; }
.tab.active { color: var(--text); border-color: var(--accent); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } .sidebar { display: none; } .main { padding: 1.25rem; } }

.file-drop {
  border: 1.5px dashed var(--border); border-radius: 8px; padding: 1.5rem;
  text-align: center; color: var(--text-dim); font-size: 0.85rem; cursor: pointer;
}
.file-drop:hover { border-color: var(--accent); }

canvas { max-width: 100%; }