/* ===== Reset & base ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* El atributo [hidden] debe ganar siempre: varias clases definen display
   (grid/flex) y sin esto pisarían a [hidden], dejando el login/spinner
   visibles aunque se marquen como ocultos. */
[hidden] { display: none !important; }

:root {
  --bg: #0b0f14;
  --bg-elev: #121821;
  --bg-elev-2: #171f2b;
  --border: #212c3a;
  --text: #e6edf3;
  --text-dim: #8b98a9;
  --text-faint: #5c6a7c;
  --accent: #f5a524;
  --accent-2: #22c55e;
  --brand: #4f9dff;
  --danger: #ef4444;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(0,0,0,.35);
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background: radial-gradient(1200px 600px at 80% -10%, #13202f 0%, var(--bg) 55%);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2 { margin: 0; font-weight: 600; }

/* ===== Buttons ===== */
.btn {
  font: inherit;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: .55rem .9rem;
  cursor: pointer;
  color: var(--text);
  background: var(--bg-elev-2);
  transition: background .15s, border-color .15s, opacity .15s;
}
.btn:hover { background: #1d2735; }
.btn:disabled { opacity: .55; cursor: default; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #06101f; font-weight: 600; }
.btn-primary:hover { background: #6cb0ff; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); background: var(--bg-elev); }
.btn-block { width: 100%; }
.btn-sm { padding: .4rem .7rem; font-size: .875rem; }

/* ===== Login ===== */
.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.75rem;
  text-align: center;
}
.login-logo { font-size: 2.75rem; line-height: 1; }
.login-card h1 { font-size: 1.4rem; margin-top: .35rem; }
.login-sub { color: var(--text-dim); font-size: .9rem; margin: .35rem 0 1.5rem; }
.field { display: block; text-align: left; margin-bottom: 1rem; }
.field span { display: block; font-size: .8rem; color: var(--text-dim); margin-bottom: .35rem; }
.field input {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .6rem .75rem;
}
.field input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(79,157,255,.18); }
.login-error {
  background: rgba(239,68,68,.12);
  border: 1px solid rgba(239,68,68,.35);
  color: #fca5a5;
  border-radius: 10px;
  padding: .55rem .7rem;
  font-size: .85rem;
  margin: 0 0 1rem;
}

/* ===== Dashboard layout ===== */
.dashboard {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.topbar-title { display: flex; align-items: center; gap: .75rem; }
.topbar-logo { font-size: 1.9rem; }
.topbar h1 { font-size: 1.25rem; }
.topbar-sub { margin: 0; color: var(--text-dim); font-size: .85rem; }
.topbar-actions { display: flex; gap: .5rem; }

/* ===== Filters ===== */
.filters { margin-bottom: 1.25rem; }
.presets { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  font: inherit;
  font-size: .875rem;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-dim);
  border-radius: 999px;
  padding: .4rem .85rem;
  cursor: pointer;
  transition: all .15s;
}
.chip:hover { color: var(--text); border-color: #33445a; }
.chip.is-active { background: var(--brand); border-color: var(--brand); color: #06101f; font-weight: 600; }
.custom-range {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: .75rem;
  margin-top: .85rem;
  padding: .85rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.custom-range label { font-size: .8rem; color: var(--text-dim); display: flex; flex-direction: column; gap: .3rem; }
.custom-range input {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .4rem .5rem;
  color-scheme: dark;
}

/* ===== States ===== */
.state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .85rem;
  padding: 3rem 1rem;
  color: var(--text-dim);
}
.state-error { color: #fca5a5; }
.spinner {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--brand);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== KPIs ===== */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: .9rem;
  margin-bottom: 1.25rem;
}
.kpi {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: .25rem;
}
.kpi-accent { border-color: rgba(245,165,36,.35); background: linear-gradient(180deg, rgba(245,165,36,.08), var(--bg-elev)); }
.kpi-cost { border-color: rgba(34,197,94,.35); background: linear-gradient(180deg, rgba(34,197,94,.08), var(--bg-elev)); }
.kpi-cost .kpi-value { color: var(--accent-2); }
.kpi-label { font-size: .78rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .04em; }
.kpi-value { font-size: 2rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; }
.kpi-accent .kpi-value { color: var(--accent); }
.kpi-hint { font-size: .75rem; color: var(--text-faint); }

/* ===== Panels ===== */
.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem 1.35rem;
  margin-bottom: 1.25rem;
}
.panel-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.panel-head h2 { font-size: 1.02rem; }
.panel-note { font-size: .8rem; color: var(--text-faint); }

/* ===== Chart (SVG) ===== */
.chart { width: 100%; overflow-x: auto; }
.chart svg { display: block; width: 100%; height: auto; }
.bar { fill: var(--brand); transition: fill .15s; }
.bar:hover { fill: #7ab6ff; }
.grid-line { stroke: var(--border); stroke-width: 1; }
.axis-label { fill: var(--text-faint); font-size: 11px; font-family: var(--sans); }
.chart-empty { color: var(--text-faint); text-align: center; padding: 2.5rem 1rem; }

/* ===== Months list ===== */
.months { display: flex; flex-direction: column; gap: .55rem; }
.month-row { display: grid; grid-template-columns: 92px 1fr auto; align-items: center; gap: .75rem; }
.month-name { color: var(--text-dim); font-size: .9rem; text-transform: capitalize; }
.month-track { background: var(--bg-elev-2); border-radius: 999px; height: 10px; overflow: hidden; }
.month-fill { height: 100%; background: linear-gradient(90deg, var(--brand), #7ab6ff); border-radius: 999px; }
.month-val { font-variant-numeric: tabular-nums; font-size: .9rem; color: var(--text); min-width: 62px; text-align: right; }

/* ===== Footer ===== */
.foot { color: var(--text-faint); font-size: .78rem; text-align: center; margin-top: 1rem; }

/* ===== Responsive ===== */
@media (max-width: 780px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .kpi-value { font-size: 1.7rem; }
}
@media (max-width: 460px) {
  .dashboard { padding: 1rem .85rem 2.5rem; }
  .kpis { grid-template-columns: 1fr 1fr; gap: .65rem; }
  .kpi { padding: .85rem .9rem; }
  .kpi-value { font-size: 1.5rem; }
  .month-row { grid-template-columns: 74px 1fr auto; }
  .topbar h1 { font-size: 1.1rem; }
}