/* =========================
   BASE
========================= */
body {
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at top, #020617, #0b1220 70%);
  color: #e5e7eb;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

/* =========================
   LOGIN CARD
========================= */
.login-box {
  width: 360px;
  padding: 40px 36px;
  background: #020617;
  border-radius: 16px;
  border: 1px solid #1e293b;
  box-shadow:
    0 40px 80px rgba(0, 0, 0, 0.75),
    inset 0 1px 0 rgba(255, 255, 255, 0.03);
  text-align: center;
}

/* =========================
   TÍTULO
========================= */
.login-box h2 {
  margin: 0 0 28px;
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.5px;
}

/* =========================
   FORMULARIO (CLAVE)
========================= */
.login-form {
  display: flex;
  flex-direction: column;   /* 🔒 columna forzada */
  gap: 16px;                /* separación uniforme */
  align-items: stretch;     /* todo al mismo ancho */
}

/* =========================
   INPUTS
========================= */
.login-form input {
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid #334155;
  background: #020617;
  color: #e5e7eb;
  font-size: 15px;
  transition: border-color .15s ease, box-shadow .15s ease;
}

.login-form input::placeholder {
  color: #64748b;
}

.login-form input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

/* =========================
   BOTÓN
========================= */
.login-form button {
  margin-top: 6px;
  padding: 14px;
  background: linear-gradient(180deg, #2563eb, #1d4ed8);
  border: none;
  border-radius: 10px;
  color: #ffffff;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: transform .05s ease, box-shadow .15s ease, opacity .15s ease;
}

.login-form button:hover {
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.45);
}

.login-form button:active {
  transform: translateY(1px);
}

.login-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

#btnResendOtp {
  background: #0f172a;
  border: 1px solid #334155;
  color: #cbd5e1;
}

#btnResendOtp:hover {
  box-shadow: none;
  border-color: #475569;
}

/* =========================
   MENSAJE
========================= */
#msg {
  margin-top: 18px;
  min-height: 18px;
  font-size: 13px;
}

/* =========================
   FOOTER EMPRESARIAL
========================= */
.login-box::after {
  content: "ACCESO RESTRINGIDO";
  display: block;
  margin-top: 30px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: #64748b;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 480px) {
  body {
    padding: 20px;
    align-items: flex-start;
  }

  .login-box {
    width: 100%;
    max-width: 420px;
    margin-top: 10vh;
    padding: 42px 28px;
  }
}

/* =========================
   TECLADO / PANTALLA BAJA
========================= */
@media (max-height: 600px) {
  .login-box {
    margin-top: 4vh;
  }
}