/* ===========================
   Paleta clara corporativa
   =========================== */
:root {
  --brand-50:  #f9fbff;
  --brand-100: #e6f0ff;
  --brand-200: #cce0ff;
  --brand-400: #6699ff;
  --brand-600: #3366cc; /* Azul principal */
  --brand-700: #254e99;

  --bg:        #f4f6fa;
  --card-bg:   #ffffff;
  --text:      #1e293b;
  --muted:     #64748b;
  --border:    #e2e8f0;
  --shadow:    0 8px 22px rgba(0, 0, 0, .06);

  --danger-bg: #fee2e2;
  --danger-bd: #fecaca;
  --danger-fg: #991b1b;

  --warn-bg:   #fef9c3;
  --warn-bd:   #fef08a;
  --warn-fg:   #854d0e;

  --radius-lg:  14px;
  --radius-md:  10px;
  --radius-sm:   8px;

  --space-1: 6px;
  --space-2: 10px;
  --space-3: 14px;
  --space-4: 18px;
  --space-5: 24px;

  --focus: 0 0 0 3px rgba(51, 102, 204, .18), 0 0 0 1px var(--brand-600);
}

/* ===========================
   Layout base
   =========================== */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background:
    radial-gradient(1200px 600px at 20% -20%, var(--brand-50), transparent 40%),
    radial-gradient(1200px 600px at 120% 120%, var(--brand-100), transparent 40%),
    var(--bg);
  color: var(--text);
}

.wrap {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-5);
}

/* ===========================
   Tarjeta / contenedor
   =========================== */
.card {
  width: 100%;
  max-width: 440px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: translateY(0);
  transition: transform .2s ease;
}
.card:hover { transform: translateY(-2px); }

.card header {
  padding: 22px var(--space-5);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.card header .logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand-400), var(--brand-600));
  box-shadow: 0 6px 16px rgba(51, 102, 204, .25);
  flex: 0 0 auto;
  overflow: hidden; /* para que la imagen no desborde */
}
.card header .logo img{
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  border-radius: inherit;
}
.card header h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: .2px;
}

.card .body { padding: var(--space-5); }

/* ===========================
   Alertas / mensajes
   =========================== */
.alert {
  padding: 12px var(--space-3);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  font-size: 14px;
  line-height: 1.35;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid transparent;
}
.alert-danger { background: var(--danger-bg); color: var(--danger-fg); border-color: var(--danger-bd); }
.alert-warning { background: var(--warn-bg);   color: var(--warn-fg);   border-color: var(--warn-bd); }

/* ===========================
   Formularios
   =========================== */
.form-row { margin-bottom: var(--space-4); }

label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 16px;
  background: #fff;
  color: var(--text);
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.input:focus {
  outline: none;
  border-color: var(--brand-600);
  box-shadow: var(--focus);
}

.actions { margin-top: var(--space-4); }
.button {
  width: 100%;
  padding: 12px 14px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--brand-400), var(--brand-600));
  color: #fff;
  font-weight: 700;
  letter-spacing: .3px;
  cursor: pointer;
  transition: filter .15s ease, transform .02s ease;
}
.button:hover  { filter: brightness(1.05); }
.button:active { transform: translateY(1px); }

.muted { color: var(--muted); font-size: 12px; margin-top: 10px; text-align: center; }

/* ===========================
   Footer de la tarjeta
   =========================== */
.footer {
  padding: 12px var(--space-3) 16px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

/* ===========================
   Responsividad
   =========================== */
@media (max-width: 480px) {
  .card { max-width: 94vw; }
  .card header { padding: 18px var(--space-4); }
  .card .body { padding: var(--space-4); }
}